From 5d66c96a190a396a1535c89bed4e33c2a005fe8d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Yaroslav=20de=20la=20Pe=C3=B1a=20Smirnov?=
 <yps@yaroslavps.com>
Date: Thu, 24 Mar 2022 01:04:02 +0300
Subject: Initial commit

Basically it works, just needs some polishing and maybe a couple of
features that I could actually use.
Also probably better docs. Not sure if it will be of use to anybody
besides me.
---
 src/slice.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 src/slice.c

(limited to 'src/slice.c')

diff --git a/src/slice.c b/src/slice.c
new file mode 100644
index 0000000..5d89d9e
--- /dev/null
+++ b/src/slice.c
@@ -0,0 +1,63 @@
+#include "slice.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+struct slice
+slice_new(const char *str, size_t start, size_t end)
+{
+	struct slice slice = {
+		.str = str,
+		.start = start,
+		.end = end,
+	};
+
+	return slice;
+}
+
+void
+slice_set(struct slice *slice, const char *str, size_t start, size_t end)
+{
+	slice->str = str;
+	slice->start = start;
+	slice->end = end;
+}
+
+size_t
+slice_len(const struct slice *slice)
+{
+	return slice->end - slice->start;
+}
+
+int
+slice_cmp(const struct slice *restrict a, const struct slice *restrict b)
+{
+	size_t lena = slice_len(a), lenb = slice_len(b);
+	int lencmp = (lena > lenb) - (lena < lenb);
+	if (lencmp) {
+		return lencmp;
+	}
+
+	for (size_t i = 0; i < lena; i++) {
+		char ca = a->str[a->start + i], cb = b->str[b->start + i];
+		int cmp = (ca > cb) - (ca < cb);
+		if (cmp) return cmp;
+	}
+
+	return 0;
+}
+
+void
+slice_cpy(struct slice *dst, const struct slice *src)
+{
+	dst->str = src->str;
+	dst->start = src->start;
+	dst->end = src->end;
+}
+
+sds
+slice_string(const struct slice *slice, sds str)
+{
+	size_t len = slice->end - slice->start;
+	return sdscatlen(str, slice->str + slice->start, len);
+}
-- 
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