[PATCH olang v3 1/2] utils: create string_view data structure

[Johnny Richard <johnny@johnnyrichard.com>]

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>
---
 src/string_view.c | 35 +++++++++++++++++++++++++++++++++++
 src/string_view.h | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+)
 create mode 100644 src/string_view.c
 create mode 100644 src/string_view.h

diff --git a/src/string_view.c b/src/string_view.c
new file mode 100644
index 0000000..122eaa2
--- /dev/null
+++ b/src/string_view.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2024 olang maintainers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#include "string_view.h"
+
+#include <stdbool.h>
+#include <string.h>
+
+bool
+string_view_eq_to_cstr(string_view_t str, char *cstr)
+{
+    size_t cstr_len = strlen(cstr);
+    if (str.size != cstr_len) {
+        return false;
+    }
+
+    size_t i = 0;
+    while (i < cstr_len && str.chars[i] == cstr[i]) {
+        i++;
+    }
+    return i == cstr_len;
+}
diff --git a/src/string_view.h b/src/string_view.h
new file mode 100644
index 0000000..367ef6b
--- /dev/null
+++ b/src/string_view.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2024 olang maintainers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#ifndef STRING_VIEW_T
+#define STRING_VIEW_T
+
+#include <stdbool.h>
+#include <stddef.h>
+
+typedef struct string_view
+{
+    char *chars;
+    size_t size;
+
+} string_view_t;
+
+// TODO: missing unit test
+bool
+string_view_eq_to_cstr(string_view_t str, char *cstr);
+
+#endif /* STRING_VIEW_T */
-- 
2.43.2