1 files changed, 65 insertions, 0 deletions
diff --git a/src/util.c b/src/util.c
new file mode 100644
index 0000000..b36558b
--- /dev/null
+++ b/src/util.c
@@ -0,0 +1,65 @@
+#include "include/util.h"
+
+void util_die(const char* fmt, ...) {
+   va_list ap;
+   fprintf(stderr, "[\e[31m==\e[0m] ");
+   va_start(ap, fmt);
+   vfprintf(stderr, fmt, ap);
+   va_end(ap);
+   fprintf(stderr, "\n");
+   exit(1);
+}
+
+void util_log(const char* fmt, ...) {
+   va_list ap;
+   fprintf(stderr, "[\e[36m===\e[0m] ");
+   va_start(ap, fmt);
+   vfprintf(stderr, fmt, ap);
+   va_end(ap);
+   fprintf(stderr, "\n");
+}
+
+char* util_get_src(char* arg) {
+   if (arg) {
+      FILE* f = fopen(arg, "rb");
+      return util_src_from_fpath(f);
+   } else {
+      return util_src_from_stdin();
+   }
+}
+
+char* util_src_from_stdin() {
+   size_t  len = 0;
+   char* src = calloc(len, sizeof(char));
+
+   while (src[len - 1] != '%') {
+      char c = getchar();
+      src = realloc(src, (len + sizeof(char)));
+      memcpy(src + len, &c, sizeof(char));
+      len += sizeof(char);
+   }
+
+   src[len - 1] = '\0'; // drop the last '%' char
+
+   return src;
+}
+
+char* util_src_from_fpath(FILE* f) {
+   if (!f) {
+      util_die("source file not found");
+   }
+
+   fseek(f, 0L, SEEK_END);
+   long fsize = ftell(f);
+   rewind(f);
+
+   char* src = calloc(1, fsize + 1);
+
+   if ((fread(src, fsize, 1, f) != 1) || !src) {
+      fclose(f);
+      free(src);
+      util_die("could not read source file");
+   }
+
+   return src;
+}