diff -r 038e3415100a -r bf6cf4dd847a project_files/frontlib/ipc/ipcprotocol.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/project_files/frontlib/ipc/ipcprotocol.c	Fri Jun 08 19:52:24 2012 +0200
@@ -0,0 +1,96 @@
+#include "ipcprotocol.h"
+#include "../util.h"
+#include "../logging.h"
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+
+int flib_ipc_append_message(flib_vector vec, const char *fmt, ...) {
+	int result = -1;
+	if(!vec || !fmt) {
+		flib_log_e("null parameter in flib_ipc_appendmessage");
+	} else {
+		// 1 byte size prefix, 255 bytes max message length, 1 0-byte for vsnprintf
+		char msgbuffer[257];
+
+		// Format the message, leaving one byte at the start for the length
+		va_list argp;
+		va_start(argp, fmt);
+		int msgSize = vsnprintf(msgbuffer+1, 256, fmt, argp);
+		va_end(argp);
+
+		if(msgSize > 255) {
+			flib_log_e("Message too long (%u bytes) in flib_ipc_appendmessage", (unsigned)msgSize);
+		} else if(msgSize<0) {
+			flib_log_e("printf error in flib_ipc_appendmessage");
+		} else {
+			// Add the length prefix
+			((uint8_t*)msgbuffer)[0] = msgSize;
+
+			// Append it to the vector
+			if(flib_vector_append(vec, msgbuffer, msgSize+1) == msgSize+1) {
+				result = 0;
+			}
+		}
+	}
+	return result;
+}
+
+int flib_ipc_append_mapconf(flib_vector vec, flib_map *map, bool mappreview) {
+	int result = -1;
+	flib_vector tempvector = flib_vector_create();
+	if(!vec || !map) {
+		flib_log_e("null parameter in flib_ipc_append_mapconf");
+	} else if(tempvector) {
+		bool error = false;
+
+		if(map->mapgen == MAPGEN_NAMED) {
+			error |= flib_ipc_append_message(tempvector, "emap %s", map->name);
+		}
+		if(map->theme && !mappreview) {
+			error |= flib_ipc_append_message(tempvector, "etheme %s", map->theme);
+		}
+		error |= flib_ipc_append_message(tempvector, "e$template_filter %i", map->templateFilter);
+		error |= flib_ipc_append_message(tempvector, "e$mapgen %i", map->mapgen);
+
+		if(map->mapgen == MAPGEN_MAZE) {
+			error |= flib_ipc_append_message(tempvector, "e$maze_size %i", map->mazeSize);
+		}
+		if(map->mapgen == MAPGEN_DRAWN) {
+			/*
+			 * We have to split the drawn map data into several edraw messages here because
+			 * it can be longer than the maximum message size.
+			 */
+			const char *edraw = "edraw ";
+			int edrawlen = strlen(edraw);
+			for(int offset=0; offset<map->drawDataSize; offset+=200) {
+				int bytesRemaining = map->drawDataSize-offset;
+				int fragmentsize = bytesRemaining < 200 ? bytesRemaining : 200;
+				uint8_t messagesize = edrawlen + fragmentsize;
+				error |= (flib_vector_append(tempvector, &messagesize, 1) != 1);
+				error |= (flib_vector_append(tempvector, edraw, edrawlen) != edrawlen);
+				error |= (flib_vector_append(tempvector, map->drawData+offset, fragmentsize) != fragmentsize);
+			}
+		}
+
+		if(!error) {
+			// Message created, now we can copy everything.
+			flib_constbuffer constbuf = flib_vector_as_constbuffer(tempvector);
+			if(flib_vector_append(vec, constbuf.data, constbuf.size) == constbuf.size) {
+				result = 0;
+			}
+		}
+	}
+	flib_vector_destroy(&tempvector);
+	return result;
+}
+
+int flib_ipc_append_seed(flib_vector vec, const char *seed) {
+	if(!vec || !seed) {
+		flib_log_e("null parameter in flib_ipc_append_seed");
+		return -1;
+	} else {
+		return flib_ipc_append_message(vec, "eseed %s", seed);
+	}
+}