1 files changed, 86 insertions, 0 deletions
diff --git a/src/string.c b/src/string.c
new file mode 100644
index 0000000..5cce400
--- /dev/null
+++ b/src/string.c
@@ -0,0 +1,86 @@
+#include <errno.h>
+#include <stdlib.h>
+
+#include <ct/debug.h>
+#include <ct/string.h>
+
+
+struct string *new_string(const char *s)
+{
+	struct string *n = malloc(sizeof(struct string));
+	if (!n) {
+		error("allocating new string: %s\n", strerror(errno));
+		return NULL;
+	}
+
+	if (!s) {
+		n->len = 1;
+		n->buf = calloc(1, 1);
+		return n;
+	}
+
+	n->len = strlen(s) + 1;
+	n->buf = strdup(s);
+	return n;
+}
+
+void destroy_string(struct string *s)
+{
+	free(s->buf);
+	free(s);
+}
+
+int str_append(struct string *s, char c)
+{
+	s->len += 1;
+	s->buf = realloc(s->buf, s->len);
+	if (!s->buf) {
+		error("appending to string: %s\n", strerror(errno));
+		return -1;
+	}
+
+	s->buf[s->len - 2] = c;
+	s->buf[s->len - 1] = 0;
+	return 0;
+}
+
+int str_concat(struct string *s, const char *c)
+{
+	size_t c_len = strlen(c);
+	size_t len = s->len + c_len;
+	s->buf = realloc(s->buf, len);
+	if (!s->buf) {
+		error("concatenating strings: %s\n", strerror(errno));
+		return -1;
+	}
+
+	strncat(s->buf + s->len - 1, c, c_len);
+	s->len = len;
+	return 0;
+}
+
+int str_add(struct string *s, struct string *c)
+{
+	size_t len = s->len + c->len - 1;
+	s->buf = realloc(s->buf, len);
+	if (!s->buf) {
+		error("adding to string: %s\n", strerror(errno));
+		return -1;
+	}
+
+	strncat(s->buf + s->len - 1, c->buf, c->len);
+	s->len = len;
+	return 0;
+}
+
+bool str_compare(struct string *s, const char *c)
+{
+	return strncmp(s->buf, c, s->len - 1) == 0;
+}
+
+void str_clear(struct string *s)
+{
+	s->len = 1;
+	if (s->buf)
+		s->buf[0] = 0;
+}