From 7b3f6a5a507a59b613998ef9ad2f14252d993d42 Mon Sep 17 00:00:00 2001
From: Carlos Maiolino <cem@toxiclabs.cc>
Date: Sat, 28 Feb 2026 12:48:48 +0100
Subject: add strnlen and isdigit helpers

This is missing and will come in handy for path parsing.

Signed-off-by: Carlos Maiolino <cem@toxiclabs.cc>
---
 src/include/toxic/string.h |  4 ++++
 src/lib/string.c           | 16 ++++++++++++++++
 2 files changed, 20 insertions(+)

(limited to 'src')

diff --git a/src/include/toxic/string.h b/src/include/toxic/string.h
index 69d8bd2..3cb4a30 100644
--- a/src/include/toxic/string.h
+++ b/src/include/toxic/string.h
@@ -3,7 +3,11 @@
 
 #include <stddef.h>
 
+#define NULL	((void *)0)
+
+bool isdigit(char c);
 size_t strlen(const char *s);
+size_t strnlen(const char *s, size_t maxlen);
 char *strcpy(char *restrict dst, const char *restrict src);
 
 void *memset(void *s, int c, size_t n);
diff --git a/src/lib/string.c b/src/lib/string.c
index e5b6972..365381b 100644
--- a/src/lib/string.c
+++ b/src/lib/string.c
@@ -1,4 +1,10 @@
 #include <stddef.h>
+#include <stdbool.h>
+
+bool isdigit(char c)
+{
+	return c >= 48 && c <= 57;
+}
 
 size_t strlen(const char *s)
 {
@@ -10,6 +16,16 @@ size_t strlen(const char *s)
 	return c;
 }
 
+size_t strnlen(const char *s, size_t maxlen)
+{
+	size_t c = 0;
+
+	while (c <= maxlen && s[c])
+		c++;
+
+	return c;
+}
+
 char *strcpy(char *restrict dst, const char *restrict src)
 {
 	size_t pos = 0;
-- 
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