Initial codebase

1 files changed, 60 insertions, 0 deletions

diff --git a/src/util.c b/src/util.c
new file mode 100644
index 0000000..e67ec18
--- /dev/null
+++ b/src/util.c
@@ -0,0 +1,60 @@
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <assert.h>
+
+#include "util.h"
+#define __FILENAME__ "util.c"
+#include "dbg.h"
+
+#include "../config.h"
+
+/* A safe malloc wrapper. */
+void *ec_malloc(size_t size) {
+    void *ptr = malloc(size);
+    if(ptr == NULL)
+		fatal("redo: cannot allocate %zu bytes", size);
+	
+    return ptr;
+}
+
+/* For concating multiple strings into a single larger one. */
+char *concat(size_t count, ...) {
+	assert(count > 0);
+	va_list ap, ap2;
+	va_start(ap, count);
+	va_copy(ap2, ap);
+	size_t i, size = 0, args_len[count];
+	for (i = 0; i < count; ++i) {
+		args_len[i] = strlen(va_arg(ap, char*));
+		size += args_len[i];
+	}
+	size++;
+	char *result = ec_malloc(size);
+	/* debug("Allocated %zu bytes at %p\n", size, result); */
+	uintptr_t offset = 0;
+	for (i = 0; i < count; ++i) {
+		strcpy(&result[offset], va_arg(ap2, char*));
+		offset += args_len[i];
+	}
+	va_end(ap);
+	va_end(ap2);
+	return result;
+}
+
+char *xbasename(const char *path) {
+	assert(path);
+	char *ptr = strrchr(path, '/');
+	return ptr? ptr+1 : (char*) path;
+}
+
+char *ec_strdup(const char* str) {
+	assert(str);
+	size_t len = strlen(str) + 1;
+	char *ptr = malloc(len);
+	if (!ptr)
+		fatal("redo: failed to duplicate string");
+
+	return memcpy(ptr, str, len);;
+}