1 files changed, 41 insertions, 0 deletions
diff --git a/common.c b/common.c
new file mode 100644
index 0000000..fcc0790
--- /dev/null
+++ b/common.c
@@ -0,0 +1,41 @@
+void fatal_error(const char* msg) {
+    fprintf(stderr, "%s\n", msg);
+    exit(1);
+}
+
+void unreachable() {
+    fatal_error("unreachable");
+}
+
+char* read_all(FILE* in) {
+    char* buf = calloc(1024 * 1024, sizeof(char));
+    char* cur = buf;
+    char* tmp = calloc(1024, sizeof(char));
+    while (fgets(tmp, 1024, in)) {
+        size_t len = strlen(tmp);
+        memcpy(cur, tmp, len);
+        cur += len;
+    }
+    return buf;
+}
+
+struct String {
+    char* data;
+    size_t len;
+};
+typedef struct String String;
+
+char* string_to_cstr(const String* s) {
+    char* buf = calloc(s->len + 1, sizeof(char));
+    memcpy(buf, s->data, s->len);
+    return buf;
+}
+
+int string_equals(const String* s1, const String* s2) {
+    return s1->len == s2->len && strncmp(s1->data, s2->data, s1->len) == 0;
+}
+
+int string_equals_cstr(const String* s1, const char* s2) {
+    size_t s2_len = strlen(s2);
+    return s1->len == s2_len && strncmp(s1->data, s2, s1->len) == 0;
+}