Banished alloca().

git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@2946 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/ChangeLog

@@ -1,4 +1,5 @@
 Changes towards version 0.7:
+- Don't use alloca() in uio. - SvdB
 - Replace PlayerOne/PlayerTwo by PlayerControls[0]/PlayerControls[1] - SvdB
 - Moved comm resources into starcon.ls2 - Michael
 - Repackaged static comm/ship data to it all uniquely named - Michael

sc2/src/sc2code/libs/uio/debug.c

@@ -667,6 +667,7 @@ listOneDir(DebugContext *debugContext, const char *arg) {
 	int i;
 	const char *pattern;
 	const char *cpath;
+	char *buf = NULL;
 
 	if (arg[0] == '\0') {
 		cpath = arg;
@@ -674,21 +675,21 @@ listOneDir(DebugContext *debugContext, const char *arg) {
 	} else {
 		pattern = strrchr(arg, '/');
 		if (pattern == NULL) {
+			// No directory component in 'arg'.
 			cpath = "";
 			pattern = arg;
 		} else if (pattern[1] == '\0') {
-			// argument ends on /
+			// 'arg' ends on /
 			cpath = arg;
 			pattern = "*";
 		} else {
 			if (pattern == arg) {
 				cpath = "/";
 			} else {
-				char *path;
-				path = uio_alloca(pattern - arg + 1);
-				memcpy(path, arg, pattern - arg);
-				path[pattern - arg] = '\0';
-				cpath = path;
+				buf = uio_malloc(pattern - arg + 1);
+				memcpy(buf, arg, pattern - arg);
+				buf[pattern - arg] = '\0';
+				cpath = buf;
 			}
 			pattern++;
 		}
@@ -708,11 +709,15 @@ listOneDir(DebugContext *debugContext, const char *arg) {
 	if (dirList == NULL) {
 		fprintf(debugContext->out, "Error in uio_getDirList(): %s.\n",
 				strerror(errno));
+		if (buf != NULL)
+			uio_free(buf);
 		return 1;
 	}
 	for (i = 0; i < dirList->numNames; i++)
 		fprintf(debugContext->out, "%s\n", dirList->names[i]);
 	uio_DirList_free(dirList);
+	if (buf != NULL)
+		uio_free(buf);
 	return 0;
 }
 

sc2/src/sc2code/libs/uio/gphys.c

@@ -223,7 +223,8 @@ uio_walkGPPath(uio_GPDir *startGPDir, const char *path,
 	int retVal;
 
 	gPDir = startGPDir;
-	tempBuf = uio_alloca(strlen(path) + 1);
+	tempBuf = uio_malloc(strlen(path) + 1);
+			// XXX: Use a dynamically allocated array when moving to C99.
 	pathEnd = path + pathLen;
 	getFirstPathComponent(path, pathEnd, &partStart, &partEnd);
 	while (1) {
@@ -247,6 +248,7 @@ uio_walkGPPath(uio_GPDir *startGPDir, const char *path,
 		getNextPathComponent(pathEnd, &partStart, &partEnd);
 	}
 
+	uio_free(tempBuf);
 	*pathRest = partStart;
 	*endGPDir = gPDir;
 	return retVal;

sc2/src/sc2code/libs/uio/ioaux.c

@@ -71,7 +71,8 @@ uio_walkPhysicalPath(uio_PDirHandle *startPDirHandle, const char *path,
 
 	uio_PDirHandle_ref(startPDirHandle);
 	pDirHandle = startPDirHandle;
-	tempBuf = uio_alloca(strlen(path) + 1);
+	tempBuf = uio_malloc(strlen(path) + 1);
+			// XXX: Use a dynamically allocated array when moving to C99.
 	pathEnd = path + pathLen;
 	getFirstPathComponent(path, pathEnd, &partStart, &partEnd);
 	for (;;) {
@@ -97,6 +98,7 @@ uio_walkPhysicalPath(uio_PDirHandle *startPDirHandle, const char *path,
 		getNextPathComponent(pathEnd, &partStart, &partEnd);
 	}
 
+	uio_free(tempBuf);
 	*pathRest = partStart;
 	*endPDirHandle = pDirHandle;
 	return retVal;
@@ -132,8 +134,9 @@ uio_makePath(uio_PDirHandle *pDirHandle, const char *path, size_t pathLen,
 
 	pathEnd = path + pathLen;
 	
-	buf = uio_alloca(pathLen + 1);
+	buf = uio_malloc(pathLen + 1);
 			// worst case length
+			// XXX: Use a dynamically allocated array when moving to C99.
 
 	uio_walkPhysicalPath(pDirHandle, path, pathLen, &pDirHandle, &rest);
 			// The reference to the original pDirHandle is still kept
@@ -152,12 +155,14 @@ uio_makePath(uio_PDirHandle *pDirHandle, const char *path, size_t pathLen,
 			int savedErrno = errno;
 			uio_PDirHandle_unref(pDirHandle);
 			errno = savedErrno;
+			uio_free(buf);
 			return NULL;
 		}
 		uio_PDirHandle_unref(pDirHandle);
 		pDirHandle = newPDirHandle;
 		getNextPathComponent(pathEnd, &start, &end);
 	}
+	uio_free(buf);
 	return pDirHandle;
 }
 

sc2/src/sc2code/libs/uio/mem.h

@@ -29,7 +29,6 @@
 #define uio_realloc realloc
 #define uio_free free
 #define uio_calloc calloc
-#define uio_alloca alloca
 
 #ifdef uio_MEM_DEBUG
 // When uio_strdup is defined to the libc strdup, there's no opportunity

sc2/src/sc2code/libs/uio/uioport.h

@@ -145,17 +145,6 @@ typedef unsigned short mode_t;
 #	define S_IFDIR _S_IFDIR
 #endif
 
-// Memory related:
-#ifdef WIN32
-#	ifdef __MINGW32__
-#		include <malloc.h>
-#	elif defined (_MSC_VER)
-#		define alloca _alloca
-#	endif
-#elif defined(__linux__) || defined(__svr4__)
-#	include <alloca.h>
-#endif
-
 // String formatting
 #ifdef _MSC_VER
 #define snprintf _snprintf