Allow OpenGL support to be disabled at compile time. Move generic utility functions out of config.c

1 files changed, 65 insertions, 0 deletions

diff --git a/util.c b/util.c
new file mode 100644
index 0000000..c41547a
--- /dev/null
+++ b/util.c
@@ -0,0 +1,65 @@
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+
+char * alloc_concat(char * first, char * second)
+{
+	int flen = strlen(first);
+	int slen = strlen(second);
+	char * ret = malloc(flen + slen + 1);
+	memcpy(ret, first, flen);
+	memcpy(ret+flen, second, slen+1);
+	return ret;
+}
+
+char * alloc_concat_m(int num_parts, char ** parts)
+{
+	int total = 0;
+	for (int i = 0; i < num_parts; i++) {
+		total += strlen(parts[i]);
+	}
+	char * ret = malloc(total + 1);
+	*ret = 0;
+	for (int i = 0; i < num_parts; i++) {
+		strcat(ret, parts[i]);
+	}
+	return ret;
+}
+
+long file_size(FILE * f)
+{
+	fseek(f, 0, SEEK_END);
+	long fsize = ftell(f);
+	fseek(f, 0, SEEK_SET);
+	return fsize;
+}
+
+char * strip_ws(char * text)
+{
+	while (*text && (!isprint(*text) || isblank(*text)))
+	{
+		text++;
+	}
+	char * ret = text;
+	text = ret + strlen(ret) - 1;
+	while (text > ret && (!isprint(*text) || isblank(*text)))
+	{
+		*text = 0;
+		text--;
+	}
+	return ret;
+}
+
+char * split_keyval(char * text)
+{
+	while (*text && !isblank(*text))
+	{
+		text++;
+	}
+	if (!*text) {
+		return text;
+	}
+	*text = 0;
+	return text+1;
+}