Configure dynamically generates SDL_config.h

I'm still wrestling with autoheader, but this should work for now...
Fixed lots of build problems with C library support disabled

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401345

src/stdlib/SDL_getenv.c

@@ -113,11 +113,11 @@ int SDL_putenv(const char *variable)
 	}
 
 	/* Allocate memory for the variable */
-	new_variable = (char *)malloc(strlen(variable)+1);
+	new_variable = (char *)SDL_malloc(SDL_strlen(variable)+1);
 	if ( ! new_variable ) {
 		return(-1);
 	}
-	strcpy(new_variable, variable);
+	SDL_strcpy(new_variable, variable);
 
 	/* Actually put it into the environment */
 	added = 0;
@@ -126,13 +126,13 @@ int SDL_putenv(const char *variable)
 		/* Check to see if it's already there... */
 		len = (value - name);
 		for ( ; SDL_env[i]; ++i ) {
-			if ( strncmp(SDL_env[i], name, len) == 0 ) {
+			if ( SDL_strncmp(SDL_env[i], name, len) == 0 ) {
 				break;
 			}
 		}
 		/* If we found it, just replace the entry */
 		if ( SDL_env[i] ) {
-			free(SDL_env[i]);
+			SDL_free(SDL_env[i]);
 			SDL_env[i] = new_variable;
 			added = 1;
 		}
@@ -147,7 +147,7 @@ int SDL_putenv(const char *variable)
 			SDL_env[i++] = (char *)0;
 			added = 1;
 		} else {
-			free(new_variable);
+			SDL_free(new_variable);
 		}
 	}
 	return (added ? 0 : -1);
@@ -161,9 +161,9 @@ char *SDL_getenv(const char *name)
 
 	value = (char *)0;
 	if ( SDL_env ) {
-		len = strlen(name);
+		len = SDL_strlen(name);
 		for ( i=0; SDL_env[i] && !value; ++i ) {
-			if ( (strncmp(SDL_env[i], name, len) == 0) &&
+			if ( (SDL_strncmp(SDL_env[i], name, len) == 0) &&
 			     (SDL_env[i][len] == '=') ) {
 				value = &SDL_env[i][len+1];
 			}
@@ -185,59 +185,59 @@ int main(int argc, char *argv[])
 
 	printf("Checking for non-existent variable... ");
 	fflush(stdout);
-	if ( ! getenv("EXISTS") ) {
+	if ( ! SDL_getenv("EXISTS") ) {
 		printf("okay\n");
 	} else {
 		printf("failed\n");
 	}
 	printf("Setting FIRST=VALUE1 in the environment... ");
 	fflush(stdout);
-	if ( putenv("FIRST=VALUE1") == 0 ) {
+	if ( SDL_putenv("FIRST=VALUE1") == 0 ) {
 		printf("okay\n");
 	} else {
 		printf("failed\n");
 	}
 	printf("Getting FIRST from the environment... ");
 	fflush(stdout);
-	value = getenv("FIRST");
-	if ( value && (strcmp(value, "VALUE1") == 0) ) {
+	value = SDL_getenv("FIRST");
+	if ( value && (SDL_strcmp(value, "VALUE1") == 0) ) {
 		printf("okay\n");
 	} else {
 		printf("failed\n");
 	}
 	printf("Setting SECOND=VALUE2 in the environment... ");
 	fflush(stdout);
-	if ( putenv("SECOND=VALUE2") == 0 ) {
+	if ( SDL_putenv("SECOND=VALUE2") == 0 ) {
 		printf("okay\n");
 	} else {
 		printf("failed\n");
 	}
 	printf("Getting SECOND from the environment... ");
 	fflush(stdout);
-	value = getenv("SECOND");
-	if ( value && (strcmp(value, "VALUE2") == 0) ) {
+	value = SDL_getenv("SECOND");
+	if ( value && (SDL_strcmp(value, "VALUE2") == 0) ) {
 		printf("okay\n");
 	} else {
 		printf("failed\n");
 	}
 	printf("Setting FIRST=NOVALUE in the environment... ");
 	fflush(stdout);
-	if ( putenv("FIRST=NOVALUE") == 0 ) {
+	if ( SDL_putenv("FIRST=NOVALUE") == 0 ) {
 		printf("okay\n");
 	} else {
 		printf("failed\n");
 	}
 	printf("Getting FIRST from the environment... ");
 	fflush(stdout);
-	value = getenv("FIRST");
-	if ( value && (strcmp(value, "NOVALUE") == 0) ) {
+	value = SDL_getenv("FIRST");
+	if ( value && (SDL_strcmp(value, "NOVALUE") == 0) ) {
 		printf("okay\n");
 	} else {
 		printf("failed\n");
 	}
 	printf("Checking for non-existent variable... ");
 	fflush(stdout);
-	if ( ! getenv("EXISTS") ) {
+	if ( ! SDL_getenv("EXISTS") ) {
 		printf("okay\n");
 	} else {
 		printf("failed\n");

src/stdlib/SDL_string.c

@@ -25,6 +25,7 @@
 
 #include "SDL_types.h"
 #include "SDL_ctype.h"
+#include "SDL_stdlib.h"
 #include "SDL_string.h"
 
 
@@ -175,7 +176,7 @@ static size_t SDL_ScanUnsignedLongLong(const char *text, int radix, Uint64 *valu
 #endif
 #endif /* SDL_HAS_64BIT_TYPE */
 
-#ifndef HAVE_SSCANF
+#if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOD)
 static size_t SDL_ScanFloat(const char *text, double *valuep)
 {
     const char *textstart = text;
@@ -322,6 +323,18 @@ char *SDL_strncpy(char *dst, const char *src, size_t maxlen)
 }
 #endif
 
+#ifndef HAVE_STRDUP
+char *SDL_strdup(const char *string)
+{
+    size_t len = SDL_strlen(string);
+    char *newstr = SDL_malloc(len+1);
+    if ( newstr ) {
+        SDL_strcpy(newstr, string);
+    }
+    return newstr;
+}
+#endif
+
 #ifndef HAVE__STRREV
 char *SDL_strrev(char *string)
 {
@@ -549,6 +562,20 @@ Sint64 SDL_strtoll(const char *string, char **endp, int base)
 
 #endif /* SDL_HAS_64BIT_TYPE */
 
+#ifndef HAVE_STRTOD
+double SDL_strtod(const char *string, char **endp)
+{
+    size_t len;
+    double value;
+
+    len = SDL_ScanFloat(string, &value);
+    if ( endp ) {
+        *endp = (char *)string + len;
+    }
+    return value;
+}
+#endif
+
 #ifndef HAVE_STRCMP
 int SDL_strcmp(const char *str1, const char *str2)
 {