Add simple config file parser

[lackey] / src / util.c

diff --git a/src/util.c b/src/util.c
index 197f3d8ea17ca09f95b485701357d296feb1190c..d6c2b50f481163b49d2544d8223a118fde143418 100644 (file)
--- a/src/util.c
+++ b/src/util.c
@@ -109,6 +109,39 @@ void *alloc0(int size)
        return data;
 }
 
+/* File functions */
+char *read_file(const char *path, int *len)
+{
+       /* we could use stat, but we'll try to be portable */
+       FILE *fd = fopen(path, "rt+");
+       if (!fd)
+               return NULL;
+
+       int   block = 512; // read size
+       int   size  = 512; // buffer size
+       int   slen  = 0;   // string length
+       char *buf   = malloc(size);
+       if (!buf)
+               goto err;
+
+       while (!feof(fd)) {
+               if (slen + block + 1 > size) {
+                       size *= 2;
+                       buf   = realloc(buf, size);
+                       if (!buf)
+                               goto err;
+               }
+               slen += fread(&buf[slen], 1, block, fd);
+               buf[slen] = '\0';
+       }
+
+err:
+       if (len)
+               *len = slen;
+       fclose(fd);
+       return buf;
+}
+
 /* Debugging functions */
 void debug(char *fmt, ...)
 {