Prepare third compiler implementation

1 files changed, 40 insertions, 0 deletions

diff --git a/src/string_view.c b/src/string_view.c
new file mode 100755
index 0000000..8247bd4
--- /dev/null
+++ b/src/string_view.c
@@ -0,0 +1,40 @@
+#include "string_view.h"
+
+char
+sv_next(StringView *sv) {
+    if (sv->n == 0) {
+        return '\0';
+    }
+    char c = sv->start[0];
+    sv->start++;
+    sv->n--;
+    return c;
+}
+
+char
+sv_peek(const StringView *sv) {
+    if (sv->n == 0) {
+        return '\0';
+    }
+    return sv->start[0];
+}
+
+bool
+sv_equal(const StringView *a, const StringView *b) {
+    if (a->n != b->n) {
+        return false;
+    }
+    for (size_t i = 0; i < a->n; i++) {
+        if (a->start[i] != b->start[i]) {
+            return false;
+        }
+    }
+    return true;
+}
+
+void
+sv_write(const StringView *sv) {
+    for (size_t i = 0; i < sv->n; i++) {
+        putchar(sv->start[i]);
+    }
+}