misc/liblua/lstrlib.c
author dag10
Mon, 21 Jan 2013 21:52:49 -0500
changeset 8424 225ede46e3dc
parent 3697 d5b30d6373fc
child 10017 de822cd3df3a
permissions -rw-r--r--
On pagenetgame, when window is too small the map/game options becomes a tabbed interface to allow for a few lines of chat to always be visible. Restored HWForm's min height to 580. Fixed the 2px alignment issue with the map list and map previews' top edges that unC0Rr was whining about. <3
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/*
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** $Id: lstrlib.c,v 1.132.1.4 2008/07/11 17:27:21 roberto Exp $
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** Standard library for string operations and pattern-matching
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** See Copyright Notice in lua.h
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*/
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#include <ctype.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define lstrlib_c
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#define LUA_LIB
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#include "lua.h"
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#include "lauxlib.h"
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#include "lualib.h"
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/* macro to `unsign' a character */
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#define uchar(c)        ((unsigned char)(c))
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static int str_len (lua_State *L) {
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  size_t l;
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  luaL_checklstring(L, 1, &l);
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  lua_pushinteger(L, l);
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  return 1;
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}
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static ptrdiff_t posrelat (ptrdiff_t pos, size_t len) {
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  /* relative string position: negative means back from end */
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  if (pos < 0) pos += (ptrdiff_t)len + 1;
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  return (pos >= 0) ? pos : 0;
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}
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static int str_sub (lua_State *L) {
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  size_t l;
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  const char *s = luaL_checklstring(L, 1, &l);
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  ptrdiff_t start = posrelat(luaL_checkinteger(L, 2), l);
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  ptrdiff_t end = posrelat(luaL_optinteger(L, 3, -1), l);
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  if (start < 1) start = 1;
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  if (end > (ptrdiff_t)l) end = (ptrdiff_t)l;
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  if (start <= end)
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    lua_pushlstring(L, s+start-1, end-start+1);
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  else lua_pushliteral(L, "");
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  return 1;
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}
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static int str_reverse (lua_State *L) {
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  size_t l;
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  luaL_Buffer b;
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  const char *s = luaL_checklstring(L, 1, &l);
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  luaL_buffinit(L, &b);
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  while (l--) luaL_addchar(&b, s[l]);
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  luaL_pushresult(&b);
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  return 1;
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}
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static int str_lower (lua_State *L) {
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  size_t l;
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  size_t i;
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  luaL_Buffer b;
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  const char *s = luaL_checklstring(L, 1, &l);
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  luaL_buffinit(L, &b);
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  for (i=0; i<l; i++)
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    luaL_addchar(&b, tolower(uchar(s[i])));
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  luaL_pushresult(&b);
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  return 1;
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}
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static int str_upper (lua_State *L) {
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  size_t l;
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  size_t i;
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  luaL_Buffer b;
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  const char *s = luaL_checklstring(L, 1, &l);
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  luaL_buffinit(L, &b);
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  for (i=0; i<l; i++)
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    luaL_addchar(&b, toupper(uchar(s[i])));
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  luaL_pushresult(&b);
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  return 1;
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}
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static int str_rep (lua_State *L) {
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  size_t l;
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  luaL_Buffer b;
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  const char *s = luaL_checklstring(L, 1, &l);
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  int n = luaL_checkint(L, 2);
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  luaL_buffinit(L, &b);
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  while (n-- > 0)
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    luaL_addlstring(&b, s, l);
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  luaL_pushresult(&b);
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  return 1;
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}
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static int str_byte (lua_State *L) {
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  size_t l;
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  const char *s = luaL_checklstring(L, 1, &l);
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  ptrdiff_t posi = posrelat(luaL_optinteger(L, 2, 1), l);
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  ptrdiff_t pose = posrelat(luaL_optinteger(L, 3, posi), l);
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  int n, i;
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  if (posi <= 0) posi = 1;
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  if ((size_t)pose > l) pose = l;
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  if (posi > pose) return 0;  /* empty interval; return no values */
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  n = (int)(pose -  posi + 1);
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  if (posi + n <= pose)  /* overflow? */
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    luaL_error(L, "string slice too long");
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  luaL_checkstack(L, n, "string slice too long");
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  for (i=0; i<n; i++)
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    lua_pushinteger(L, uchar(s[posi+i-1]));
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  return n;
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}
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static int str_char (lua_State *L) {
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  int n = lua_gettop(L);  /* number of arguments */
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  int i;
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  luaL_Buffer b;
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  luaL_buffinit(L, &b);
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  for (i=1; i<=n; i++) {
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    int c = luaL_checkint(L, i);
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    luaL_argcheck(L, uchar(c) == c, i, "invalid value");
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    luaL_addchar(&b, uchar(c));
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  }
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  luaL_pushresult(&b);
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  return 1;
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}
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static int writer (lua_State *L, const void* b, size_t size, void* B) {
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  (void)L;
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  luaL_addlstring((luaL_Buffer*) B, (const char *)b, size);
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  return 0;
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}
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static int str_dump (lua_State *L) {
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  luaL_Buffer b;
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  luaL_checktype(L, 1, LUA_TFUNCTION);
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  lua_settop(L, 1);
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  luaL_buffinit(L,&b);
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  if (lua_dump(L, writer, &b) != 0)
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    luaL_error(L, "unable to dump given function");
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  luaL_pushresult(&b);
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  return 1;
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}
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/*
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** {======================================================
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** PATTERN MATCHING
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** =======================================================
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*/
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#define CAP_UNFINISHED	(-1)
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#define CAP_POSITION	(-2)
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typedef struct MatchState {
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  const char *src_init;  /* init of source string */
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  const char *src_end;  /* end (`\0') of source string */
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  lua_State *L;
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  int level;  /* total number of captures (finished or unfinished) */
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  struct {
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    const char *init;
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    ptrdiff_t len;
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  } capture[LUA_MAXCAPTURES];
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} MatchState;
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#define L_ESC		'%'
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#define SPECIALS	"^$*+?.([%-"
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static int check_capture (MatchState *ms, int l) {
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  l -= '1';
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  if (l < 0 || l >= ms->level || ms->capture[l].len == CAP_UNFINISHED)
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    return luaL_error(ms->L, "invalid capture index");
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  return l;
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}
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static int capture_to_close (MatchState *ms) {
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  int level = ms->level;
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  for (level--; level>=0; level--)
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    if (ms->capture[level].len == CAP_UNFINISHED) return level;
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  return luaL_error(ms->L, "invalid pattern capture");
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}
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static const char *classend (MatchState *ms, const char *p) {
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  switch (*p++) {
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    case L_ESC: {
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      if (*p == '\0')
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        luaL_error(ms->L, "malformed pattern (ends with " LUA_QL("%%") ")");
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      return p+1;
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    }
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    case '[': {
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      if (*p == '^') p++;
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      do {  /* look for a `]' */
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        if (*p == '\0')
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          luaL_error(ms->L, "malformed pattern (missing " LUA_QL("]") ")");
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        if (*(p++) == L_ESC && *p != '\0')
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          p++;  /* skip escapes (e.g. `%]') */
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      } while (*p != ']');
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      return p+1;
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    }
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    default: {
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      return p;
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    }
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  }
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}
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static int match_class (int c, int cl) {
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  int res;
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  switch (tolower(cl)) {
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    case 'a' : res = isalpha(c); break;
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    case 'c' : res = iscntrl(c); break;
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    case 'd' : res = isdigit(c); break;
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    case 'l' : res = islower(c); break;
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    case 'p' : res = ispunct(c); break;
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    case 's' : res = isspace(c); break;
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    case 'u' : res = isupper(c); break;
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    case 'w' : res = isalnum(c); break;
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    case 'x' : res = isxdigit(c); break;
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    case 'z' : res = (c == 0); break;
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    default: return (cl == c);
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  }
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  return (islower(cl) ? res : !res);
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}
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static int matchbracketclass (int c, const char *p, const char *ec) {
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  int sig = 1;
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  if (*(p+1) == '^') {
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    sig = 0;
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    p++;  /* skip the `^' */
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  }
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  while (++p < ec) {
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    if (*p == L_ESC) {
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      p++;
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      if (match_class(c, uchar(*p)))
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        return sig;
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    }
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    else if ((*(p+1) == '-') && (p+2 < ec)) {
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      p+=2;
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      if (uchar(*(p-2)) <= c && c <= uchar(*p))
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        return sig;
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    }
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    else if (uchar(*p) == c) return sig;
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  }
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  return !sig;
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}
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static int singlematch (int c, const char *p, const char *ep) {
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  switch (*p) {
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    case '.': return 1;  /* matches any char */
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    case L_ESC: return match_class(c, uchar(*(p+1)));
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    case '[': return matchbracketclass(c, p, ep-1);
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    default:  return (uchar(*p) == c);
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  }
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}
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static const char *match (MatchState *ms, const char *s, const char *p);
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static const char *matchbalance (MatchState *ms, const char *s,
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                                   const char *p) {
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   283
  if (*p == 0 || *(p+1) == 0)
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    luaL_error(ms->L, "unbalanced pattern");
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  if (*s != *p) return NULL;
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   286
  else {
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    int b = *p;
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    int e = *(p+1);
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    int cont = 1;
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    while (++s < ms->src_end) {
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   291
      if (*s == e) {
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        if (--cont == 0) return s+1;
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   293
      }
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      else if (*s == b) cont++;
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    }
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   296
  }
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  return NULL;  /* string ends out of balance */
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   298
}
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   299
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   300
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static const char *max_expand (MatchState *ms, const char *s,
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                                 const char *p, const char *ep) {
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   303
  ptrdiff_t i = 0;  /* counts maximum expand for item */
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  while ((s+i)<ms->src_end && singlematch(uchar(*(s+i)), p, ep))
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    i++;
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  /* keeps trying to match with the maximum repetitions */
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   307
  while (i>=0) {
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    const char *res = match(ms, (s+i), ep+1);
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    if (res) return res;
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    i--;  /* else didn't match; reduce 1 repetition to try again */
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   311
  }
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  return NULL;
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   313
}
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   314
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   315
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   316
static const char *min_expand (MatchState *ms, const char *s,
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   317
                                 const char *p, const char *ep) {
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   318
  for (;;) {
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   319
    const char *res = match(ms, s, ep+1);
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   320
    if (res != NULL)
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      return res;
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   322
    else if (s<ms->src_end && singlematch(uchar(*s), p, ep))
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   323
      s++;  /* try with one more repetition */
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   324
    else return NULL;
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   325
  }
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   326
}
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   327
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   328
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   329
static const char *start_capture (MatchState *ms, const char *s,
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   330
                                    const char *p, int what) {
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   331
  const char *res;
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  int level = ms->level;
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   333
  if (level >= LUA_MAXCAPTURES) luaL_error(ms->L, "too many captures");
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   334
  ms->capture[level].init = s;
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   335
  ms->capture[level].len = what;
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   336
  ms->level = level+1;
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   337
  if ((res=match(ms, s, p)) == NULL)  /* match failed? */
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   338
    ms->level--;  /* undo capture */
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   339
  return res;
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   340
}
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diff changeset
   341
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   342
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   343
static const char *end_capture (MatchState *ms, const char *s,
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   344
                                  const char *p) {
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   345
  int l = capture_to_close(ms);
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   346
  const char *res;
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   347
  ms->capture[l].len = s - ms->capture[l].init;  /* close capture */
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   348
  if ((res = match(ms, s, p)) == NULL)  /* match failed? */
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   349
    ms->capture[l].len = CAP_UNFINISHED;  /* undo capture */
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   350
  return res;
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   351
}
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diff changeset
   352
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diff changeset
   353
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   354
static const char *match_capture (MatchState *ms, const char *s, int l) {
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   355
  size_t len;
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   356
  l = check_capture(ms, l);
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   357
  len = ms->capture[l].len;
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   358
  if ((size_t)(ms->src_end-s) >= len &&
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   359
      memcmp(ms->capture[l].init, s, len) == 0)
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   360
    return s+len;
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   361
  else return NULL;
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   362
}
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   363
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   364
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   365
static const char *match (MatchState *ms, const char *s, const char *p) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   366
  init: /* using goto's to optimize tail recursion */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   367
  switch (*p) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   368
    case '(': {  /* start capture */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   369
      if (*(p+1) == ')')  /* position capture? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   370
        return start_capture(ms, s, p+2, CAP_POSITION);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   371
      else
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   372
        return start_capture(ms, s, p+1, CAP_UNFINISHED);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   373
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   374
    case ')': {  /* end capture */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   375
      return end_capture(ms, s, p+1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   376
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   377
    case L_ESC: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   378
      switch (*(p+1)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   379
        case 'b': {  /* balanced string? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   380
          s = matchbalance(ms, s, p+2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   381
          if (s == NULL) return NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   382
          p+=4; goto init;  /* else return match(ms, s, p+4); */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   383
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   384
        case 'f': {  /* frontier? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   385
          const char *ep; char previous;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   386
          p += 2;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   387
          if (*p != '[')
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   388
            luaL_error(ms->L, "missing " LUA_QL("[") " after "
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   389
                               LUA_QL("%%f") " in pattern");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   390
          ep = classend(ms, p);  /* points to what is next */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   391
          previous = (s == ms->src_init) ? '\0' : *(s-1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   392
          if (matchbracketclass(uchar(previous), p, ep-1) ||
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   393
             !matchbracketclass(uchar(*s), p, ep-1)) return NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   394
          p=ep; goto init;  /* else return match(ms, s, ep); */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   395
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   396
        default: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   397
          if (isdigit(uchar(*(p+1)))) {  /* capture results (%0-%9)? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   398
            s = match_capture(ms, s, uchar(*(p+1)));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   399
            if (s == NULL) return NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   400
            p+=2; goto init;  /* else return match(ms, s, p+2) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   401
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   402
          goto dflt;  /* case default */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   403
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   404
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   405
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   406
    case '\0': {  /* end of pattern */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   407
      return s;  /* match succeeded */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   408
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   409
    case '$': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   410
      if (*(p+1) == '\0')  /* is the `$' the last char in pattern? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   411
        return (s == ms->src_end) ? s : NULL;  /* check end of string */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   412
      else goto dflt;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   413
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   414
    default: dflt: {  /* it is a pattern item */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   415
      const char *ep = classend(ms, p);  /* points to what is next */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   416
      int m = s<ms->src_end && singlematch(uchar(*s), p, ep);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   417
      switch (*ep) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   418
        case '?': {  /* optional */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   419
          const char *res;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   420
          if (m && ((res=match(ms, s+1, ep+1)) != NULL))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   421
            return res;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   422
          p=ep+1; goto init;  /* else return match(ms, s, ep+1); */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   423
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   424
        case '*': {  /* 0 or more repetitions */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   425
          return max_expand(ms, s, p, ep);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   426
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   427
        case '+': {  /* 1 or more repetitions */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   428
          return (m ? max_expand(ms, s+1, p, ep) : NULL);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   429
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   430
        case '-': {  /* 0 or more repetitions (minimum) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   431
          return min_expand(ms, s, p, ep);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   432
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   433
        default: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   434
          if (!m) return NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   435
          s++; p=ep; goto init;  /* else return match(ms, s+1, ep); */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   436
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   437
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   438
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   439
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   440
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   441
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   442
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   443
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   444
static const char *lmemfind (const char *s1, size_t l1,
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   445
                               const char *s2, size_t l2) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   446
  if (l2 == 0) return s1;  /* empty strings are everywhere */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   447
  else if (l2 > l1) return NULL;  /* avoids a negative `l1' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   448
  else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   449
    const char *init;  /* to search for a `*s2' inside `s1' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   450
    l2--;  /* 1st char will be checked by `memchr' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   451
    l1 = l1-l2;  /* `s2' cannot be found after that */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   452
    while (l1 > 0 && (init = (const char *)memchr(s1, *s2, l1)) != NULL) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   453
      init++;   /* 1st char is already checked */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   454
      if (memcmp(init, s2+1, l2) == 0)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   455
        return init-1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   456
      else {  /* correct `l1' and `s1' to try again */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   457
        l1 -= init-s1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   458
        s1 = init;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   459
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   460
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   461
    return NULL;  /* not found */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   462
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   463
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   464
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   465
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   466
static void push_onecapture (MatchState *ms, int i, const char *s,
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   467
                                                    const char *e) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   468
  if (i >= ms->level) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   469
    if (i == 0)  /* ms->level == 0, too */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   470
      lua_pushlstring(ms->L, s, e - s);  /* add whole match */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   471
    else
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   472
      luaL_error(ms->L, "invalid capture index");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   473
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   474
  else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   475
    ptrdiff_t l = ms->capture[i].len;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   476
    if (l == CAP_UNFINISHED) luaL_error(ms->L, "unfinished capture");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   477
    if (l == CAP_POSITION)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   478
      lua_pushinteger(ms->L, ms->capture[i].init - ms->src_init + 1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   479
    else
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   480
      lua_pushlstring(ms->L, ms->capture[i].init, l);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   481
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   482
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   483
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   484
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   485
static int push_captures (MatchState *ms, const char *s, const char *e) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   486
  int i;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   487
  int nlevels = (ms->level == 0 && s) ? 1 : ms->level;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   488
  luaL_checkstack(ms->L, nlevels, "too many captures");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   489
  for (i = 0; i < nlevels; i++)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   490
    push_onecapture(ms, i, s, e);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   491
  return nlevels;  /* number of strings pushed */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   492
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   493
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   494
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   495
static int str_find_aux (lua_State *L, int find) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   496
  size_t l1, l2;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   497
  const char *s = luaL_checklstring(L, 1, &l1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   498
  const char *p = luaL_checklstring(L, 2, &l2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   499
  ptrdiff_t init = posrelat(luaL_optinteger(L, 3, 1), l1) - 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   500
  if (init < 0) init = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   501
  else if ((size_t)(init) > l1) init = (ptrdiff_t)l1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   502
  if (find && (lua_toboolean(L, 4) ||  /* explicit request? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   503
      strpbrk(p, SPECIALS) == NULL)) {  /* or no special characters? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   504
    /* do a plain search */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   505
    const char *s2 = lmemfind(s+init, l1-init, p, l2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   506
    if (s2) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   507
      lua_pushinteger(L, s2-s+1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   508
      lua_pushinteger(L, s2-s+l2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   509
      return 2;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   510
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   511
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   512
  else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   513
    MatchState ms;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   514
    int anchor = (*p == '^') ? (p++, 1) : 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   515
    const char *s1=s+init;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   516
    ms.L = L;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   517
    ms.src_init = s;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   518
    ms.src_end = s+l1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   519
    do {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   520
      const char *res;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   521
      ms.level = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   522
      if ((res=match(&ms, s1, p)) != NULL) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   523
        if (find) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   524
          lua_pushinteger(L, s1-s+1);  /* start */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   525
          lua_pushinteger(L, res-s);   /* end */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   526
          return push_captures(&ms, NULL, 0) + 2;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   527
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   528
        else
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   529
          return push_captures(&ms, s1, res);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   530
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   531
    } while (s1++ < ms.src_end && !anchor);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   532
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   533
  lua_pushnil(L);  /* not found */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   534
  return 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   535
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   536
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   537
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   538
static int str_find (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   539
  return str_find_aux(L, 1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   540
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   541
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   542
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   543
static int str_match (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   544
  return str_find_aux(L, 0);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   545
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   546
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   547
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   548
static int gmatch_aux (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   549
  MatchState ms;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   550
  size_t ls;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   551
  const char *s = lua_tolstring(L, lua_upvalueindex(1), &ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   552
  const char *p = lua_tostring(L, lua_upvalueindex(2));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   553
  const char *src;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   554
  ms.L = L;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   555
  ms.src_init = s;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   556
  ms.src_end = s+ls;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   557
  for (src = s + (size_t)lua_tointeger(L, lua_upvalueindex(3));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   558
       src <= ms.src_end;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   559
       src++) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   560
    const char *e;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   561
    ms.level = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   562
    if ((e = match(&ms, src, p)) != NULL) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   563
      lua_Integer newstart = e-s;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   564
      if (e == src) newstart++;  /* empty match? go at least one position */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   565
      lua_pushinteger(L, newstart);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   566
      lua_replace(L, lua_upvalueindex(3));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   567
      return push_captures(&ms, src, e);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   568
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   569
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   570
  return 0;  /* not found */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   571
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   572
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   573
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   574
static int gmatch (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   575
  luaL_checkstring(L, 1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   576
  luaL_checkstring(L, 2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   577
  lua_settop(L, 2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   578
  lua_pushinteger(L, 0);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   579
  lua_pushcclosure(L, gmatch_aux, 3);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   580
  return 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   581
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   582
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   583
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   584
static int gfind_nodef (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   585
  return luaL_error(L, LUA_QL("string.gfind") " was renamed to "
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   586
                       LUA_QL("string.gmatch"));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   587
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   588
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   589
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   590
static void add_s (MatchState *ms, luaL_Buffer *b, const char *s,
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   591
                                                   const char *e) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   592
  size_t l, i;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   593
  const char *news = lua_tolstring(ms->L, 3, &l);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   594
  for (i = 0; i < l; i++) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   595
    if (news[i] != L_ESC)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   596
      luaL_addchar(b, news[i]);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   597
    else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   598
      i++;  /* skip ESC */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   599
      if (!isdigit(uchar(news[i])))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   600
        luaL_addchar(b, news[i]);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   601
      else if (news[i] == '0')
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   602
          luaL_addlstring(b, s, e - s);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   603
      else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   604
        push_onecapture(ms, news[i] - '1', s, e);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   605
        luaL_addvalue(b);  /* add capture to accumulated result */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   606
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   607
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   608
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   609
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   610
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   611
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   612
static void add_value (MatchState *ms, luaL_Buffer *b, const char *s,
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   613
                                                       const char *e) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   614
  lua_State *L = ms->L;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   615
  switch (lua_type(L, 3)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   616
    case LUA_TNUMBER:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   617
    case LUA_TSTRING: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   618
      add_s(ms, b, s, e);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   619
      return;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   620
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   621
    case LUA_TFUNCTION: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   622
      int n;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   623
      lua_pushvalue(L, 3);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   624
      n = push_captures(ms, s, e);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   625
      lua_call(L, n, 1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   626
      break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   627
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   628
    case LUA_TTABLE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   629
      push_onecapture(ms, 0, s, e);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   630
      lua_gettable(L, 3);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   631
      break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   632
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   633
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   634
  if (!lua_toboolean(L, -1)) {  /* nil or false? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   635
    lua_pop(L, 1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   636
    lua_pushlstring(L, s, e - s);  /* keep original text */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   637
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   638
  else if (!lua_isstring(L, -1))
3697
d5b30d6373fc remove trailing spaces from end of line
koda
parents: 2812
diff changeset
   639
    luaL_error(L, "invalid replacement value (a %s)", luaL_typename(L, -1));
2812
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   640
  luaL_addvalue(b);  /* add result to accumulator */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   641
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   642
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   643
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   644
static int str_gsub (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   645
  size_t srcl;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   646
  const char *src = luaL_checklstring(L, 1, &srcl);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   647
  const char *p = luaL_checkstring(L, 2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   648
  int  tr = lua_type(L, 3);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   649
  int max_s = luaL_optint(L, 4, srcl+1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   650
  int anchor = (*p == '^') ? (p++, 1) : 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   651
  int n = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   652
  MatchState ms;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   653
  luaL_Buffer b;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   654
  luaL_argcheck(L, tr == LUA_TNUMBER || tr == LUA_TSTRING ||
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   655
                   tr == LUA_TFUNCTION || tr == LUA_TTABLE, 3,
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   656
                      "string/function/table expected");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   657
  luaL_buffinit(L, &b);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   658
  ms.L = L;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   659
  ms.src_init = src;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   660
  ms.src_end = src+srcl;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   661
  while (n < max_s) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   662
    const char *e;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   663
    ms.level = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   664
    e = match(&ms, src, p);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   665
    if (e) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   666
      n++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   667
      add_value(&ms, &b, src, e);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   668
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   669
    if (e && e>src) /* non empty match? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   670
      src = e;  /* skip it */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   671
    else if (src < ms.src_end)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   672
      luaL_addchar(&b, *src++);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   673
    else break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   674
    if (anchor) break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   675
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   676
  luaL_addlstring(&b, src, ms.src_end-src);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   677
  luaL_pushresult(&b);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   678
  lua_pushinteger(L, n);  /* number of substitutions */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   679
  return 2;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   680
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   681
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   682
/* }====================================================== */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   683
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   684
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   685
/* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   686
#define MAX_ITEM	512
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   687
/* valid flags in a format specification */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   688
#define FLAGS	"-+ #0"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   689
/*
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   690
** maximum size of each format specification (such as '%-099.99d')
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   691
** (+10 accounts for %99.99x plus margin of error)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   692
*/
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   693
#define MAX_FORMAT	(sizeof(FLAGS) + sizeof(LUA_INTFRMLEN) + 10)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   694
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   695
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   696
static void addquoted (lua_State *L, luaL_Buffer *b, int arg) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   697
  size_t l;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   698
  const char *s = luaL_checklstring(L, arg, &l);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   699
  luaL_addchar(b, '"');
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   700
  while (l--) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   701
    switch (*s) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   702
      case '"': case '\\': case '\n': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   703
        luaL_addchar(b, '\\');
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   704
        luaL_addchar(b, *s);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   705
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   706
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   707
      case '\r': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   708
        luaL_addlstring(b, "\\r", 2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   709
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   710
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   711
      case '\0': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   712
        luaL_addlstring(b, "\\000", 4);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   713
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   714
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   715
      default: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   716
        luaL_addchar(b, *s);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   717
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   718
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   719
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   720
    s++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   721
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   722
  luaL_addchar(b, '"');
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   723
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   724
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   725
static const char *scanformat (lua_State *L, const char *strfrmt, char *form) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   726
  const char *p = strfrmt;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   727
  while (*p != '\0' && strchr(FLAGS, *p) != NULL) p++;  /* skip flags */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   728
  if ((size_t)(p - strfrmt) >= sizeof(FLAGS))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   729
    luaL_error(L, "invalid format (repeated flags)");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   730
  if (isdigit(uchar(*p))) p++;  /* skip width */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   731
  if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   732
  if (*p == '.') {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   733
    p++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   734
    if (isdigit(uchar(*p))) p++;  /* skip precision */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   735
    if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   736
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   737
  if (isdigit(uchar(*p)))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   738
    luaL_error(L, "invalid format (width or precision too long)");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   739
  *(form++) = '%';
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   740
  strncpy(form, strfrmt, p - strfrmt + 1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   741
  form += p - strfrmt + 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   742
  *form = '\0';
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   743
  return p;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   744
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   745
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   746
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   747
static void addintlen (char *form) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   748
  size_t l = strlen(form);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   749
  char spec = form[l - 1];
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   750
  strcpy(form + l - 1, LUA_INTFRMLEN);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   751
  form[l + sizeof(LUA_INTFRMLEN) - 2] = spec;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   752
  form[l + sizeof(LUA_INTFRMLEN) - 1] = '\0';
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   753
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   754
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   755
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   756
static int str_format (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   757
  int arg = 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   758
  size_t sfl;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   759
  const char *strfrmt = luaL_checklstring(L, arg, &sfl);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   760
  const char *strfrmt_end = strfrmt+sfl;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   761
  luaL_Buffer b;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   762
  luaL_buffinit(L, &b);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   763
  while (strfrmt < strfrmt_end) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   764
    if (*strfrmt != L_ESC)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   765
      luaL_addchar(&b, *strfrmt++);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   766
    else if (*++strfrmt == L_ESC)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   767
      luaL_addchar(&b, *strfrmt++);  /* %% */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   768
    else { /* format item */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   769
      char form[MAX_FORMAT];  /* to store the format (`%...') */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   770
      char buff[MAX_ITEM];  /* to store the formatted item */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   771
      arg++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   772
      strfrmt = scanformat(L, strfrmt, form);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   773
      switch (*strfrmt++) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   774
        case 'c': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   775
          sprintf(buff, form, (int)luaL_checknumber(L, arg));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   776
          break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   777
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   778
        case 'd':  case 'i': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   779
          addintlen(form);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   780
          sprintf(buff, form, (LUA_INTFRM_T)luaL_checknumber(L, arg));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   781
          break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   782
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   783
        case 'o':  case 'u':  case 'x':  case 'X': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   784
          addintlen(form);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   785
          sprintf(buff, form, (unsigned LUA_INTFRM_T)luaL_checknumber(L, arg));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   786
          break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   787
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   788
        case 'e':  case 'E': case 'f':
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   789
        case 'g': case 'G': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   790
          sprintf(buff, form, (double)luaL_checknumber(L, arg));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   791
          break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   792
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   793
        case 'q': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   794
          addquoted(L, &b, arg);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   795
          continue;  /* skip the 'addsize' at the end */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   796
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   797
        case 's': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   798
          size_t l;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   799
          const char *s = luaL_checklstring(L, arg, &l);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   800
          if (!strchr(form, '.') && l >= 100) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   801
            /* no precision and string is too long to be formatted;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   802
               keep original string */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   803
            lua_pushvalue(L, arg);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   804
            luaL_addvalue(&b);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   805
            continue;  /* skip the `addsize' at the end */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   806
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   807
          else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   808
            sprintf(buff, form, s);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   809
            break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   810
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   811
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   812
        default: {  /* also treat cases `pnLlh' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   813
          return luaL_error(L, "invalid option " LUA_QL("%%%c") " to "
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   814
                               LUA_QL("format"), *(strfrmt - 1));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   815
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   816
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   817
      luaL_addlstring(&b, buff, strlen(buff));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   818
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   819
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   820
  luaL_pushresult(&b);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   821
  return 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   822
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   823
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   824
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   825
static const luaL_Reg strlib[] = {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   826
  {"byte", str_byte},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   827
  {"char", str_char},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   828
  {"dump", str_dump},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   829
  {"find", str_find},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   830
  {"format", str_format},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   831
  {"gfind", gfind_nodef},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   832
  {"gmatch", gmatch},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   833
  {"gsub", str_gsub},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   834
  {"len", str_len},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   835
  {"lower", str_lower},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   836
  {"match", str_match},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   837
  {"rep", str_rep},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   838
  {"reverse", str_reverse},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   839
  {"sub", str_sub},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   840
  {"upper", str_upper},
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   841
  {NULL, NULL}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   842
};
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   843
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   844
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   845
static void createmetatable (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   846
  lua_createtable(L, 0, 1);  /* create metatable for strings */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   847
  lua_pushliteral(L, "");  /* dummy string */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   848
  lua_pushvalue(L, -2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   849
  lua_setmetatable(L, -2);  /* set string metatable */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   850
  lua_pop(L, 1);  /* pop dummy string */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   851
  lua_pushvalue(L, -2);  /* string library... */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   852
  lua_setfield(L, -2, "__index");  /* ...is the __index metamethod */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   853
  lua_pop(L, 1);  /* pop metatable */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   854
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   855
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   856
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   857
/*
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   858
** Open string library
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   859
*/
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   860
LUALIB_API int luaopen_string (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   861
  luaL_register(L, LUA_STRLIBNAME, strlib);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   862
#if defined(LUA_COMPAT_GFIND)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   863
  lua_getfield(L, -1, "gmatch");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   864
  lua_setfield(L, -2, "gfind");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   865
#endif
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   866
  createmetatable(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   867
  return 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   868
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   869