author | Medo <smaxein@googlemail.com> |
Wed, 27 Jun 2012 22:52:19 +0200 (2012-06-27) | |
changeset 7314 | 6171f0bad318 |
parent 7275 | 15f722e0b96f |
child 7316 | f7b49b2c5d84 |
permissions | -rw-r--r-- |
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/* |
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* Hedgewars, a free turn based strategy game |
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* Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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*/ |
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#include "buffer.h" |
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#include "logging.h" |
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#include "util.h" |
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#include <stdlib.h> |
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#include <limits.h> |
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#include <string.h> |
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#define MIN_VECTOR_CAPACITY 16 |
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struct _flib_vector { |
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void *data; |
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size_t size; |
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size_t capacity; |
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}; |
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flib_vector *flib_vector_create() { |
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flib_vector *result = NULL; |
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flib_vector *tmpVector = flib_calloc(1, sizeof(flib_vector)); |
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if(tmpVector) { |
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tmpVector->data = flib_malloc(MIN_VECTOR_CAPACITY); |
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if(tmpVector->data) { |
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tmpVector->size = 0; |
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tmpVector->capacity = MIN_VECTOR_CAPACITY; |
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result = tmpVector; |
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tmpVector = NULL; |
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} |
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} |
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flib_vector_destroy(tmpVector); |
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return result; |
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} |
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void flib_vector_destroy(flib_vector *vec) { |
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if(vec) { |
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free(vec->data); |
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free(vec); |
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} |
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} |
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static int setCapacity(flib_vector *vec, size_t newCapacity) { |
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if(newCapacity == vec->capacity) { |
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return 0; |
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} |
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void *newData = realloc(vec->data, newCapacity); |
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if(newData) { |
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vec->data = newData; |
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vec->capacity = newCapacity; |
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return 0; |
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} else { |
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return -1; |
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} |
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} |
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static int allocateExtraCapacity(flib_vector *vec, size_t extraCapacity) { |
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if(extraCapacity <= SIZE_MAX - vec->capacity) { |
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return setCapacity(vec, vec->capacity + extraCapacity); |
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} else { |
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return -1; |
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} |
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} |
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int flib_vector_resize(flib_vector *vec, size_t newSize) { |
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if(!vec) { |
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flib_log_e("null parameter in flib_vector_resize"); |
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return -1; |
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} |
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|
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if(vec->capacity < newSize) { |
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// Resize exponentially for constant amortized time, |
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// But at least by as much as we need of course |
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size_t extraCapacity = (vec->capacity)/2; |
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size_t minExtraCapacity = newSize - vec->capacity; |
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if(extraCapacity < minExtraCapacity) { |
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extraCapacity = minExtraCapacity; |
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} |
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|
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if(allocateExtraCapacity(vec, extraCapacity)) { |
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allocateExtraCapacity(vec, minExtraCapacity); |
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} |
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} else if(vec->capacity/2 > newSize) { |
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size_t newCapacity = newSize+newSize/4; |
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if(newCapacity < MIN_VECTOR_CAPACITY) { |
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newCapacity = MIN_VECTOR_CAPACITY; |
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} |
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setCapacity(vec, newCapacity); |
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} |
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if(vec->capacity >= newSize) { |
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vec->size = newSize; |
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return 0; |
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} else { |
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return -1; |
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} |
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} |
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int flib_vector_append(flib_vector *vec, const void *data, size_t len) { |
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if(!log_badparams_if(!vec || (!data && len>0)) |
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&& !log_oom_if(len > SIZE_MAX-vec->size)) { |
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size_t oldSize = vec->size; |
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if(!log_oom_if(flib_vector_resize(vec, vec->size+len))) { |
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memmove(((uint8_t*)vec->data) + oldSize, data, len); |
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return 0; |
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} |
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} |
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return -1; |
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} |
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|
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int flib_vector_appendf(flib_vector *vec, const char *fmt, ...) { |
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int result = -1; |
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if(!log_badparams_if(!vec || !fmt)) { |
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va_list argp; |
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va_start(argp, fmt); |
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char *formatted = flib_vasprintf(fmt, argp); |
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va_end(argp); |
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|
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135 |
|
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if(formatted) { |
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size_t len = strlen(formatted); |
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result = flib_vector_append(vec, formatted, len); |
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} |
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} |
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return result; |
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} |
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143 |
|
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flib_buffer flib_vector_as_buffer(flib_vector *vec) { |
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if(!vec) { |
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flib_log_e("null parameter in flib_vector_as_buffer"); |
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flib_buffer result = {NULL, 0}; |
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return result; |
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} else { |
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flib_buffer result = {vec->data, vec->size}; |
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return result; |
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} |
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} |
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|
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flib_constbuffer flib_vector_as_constbuffer(flib_vector *vec) { |
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if(!vec) { |
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flib_log_e("null parameter in flib_vector_as_constbuffer"); |
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flib_constbuffer result = {NULL, 0}; |
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return result; |
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} else { |
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flib_constbuffer result = {vec->data, vec->size}; |
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return result; |
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} |
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} |
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|
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void *flib_vector_data(flib_vector *vec) { |
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if(!vec) { |
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flib_log_e("null parameter in flib_vector_data"); |
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return NULL; |
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} else { |
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return vec->data; |
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} |
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} |
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|
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size_t flib_vector_size(flib_vector *vec) { |
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if(!vec) { |
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flib_log_e("null parameter in flib_vector_size"); |
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return 0; |
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} else { |
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return vec->size; |
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} |
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182 |
} |