From 4546c75d685475d8b9f215b588364e1d1bbd0b79 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Wed, 29 Apr 2020 19:21:29 +0200
Subject: MUCH work in libc

Also cleaned up some syscalls etc
---
 src/userspace/libc/stdlib/htoi.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 src/userspace/libc/stdlib/htoi.c

(limited to 'src/userspace/libc/stdlib/htoi.c')

diff --git a/src/userspace/libc/stdlib/htoi.c b/src/userspace/libc/stdlib/htoi.c
new file mode 100644
index 0000000..cf79b7a
--- /dev/null
+++ b/src/userspace/libc/stdlib/htoi.c
@@ -0,0 +1,24 @@
+#include <stdint.h>
+#include <stddef.h>
+#include <math.h>
+#include <string.h>
+
+int htoi(char *str)
+{
+	u8 s_str = strlen(str);
+
+	u8 i = 0;
+	int ret = 0;
+	for (; i < s_str; i++) {
+		char c = str[i];
+		int aux = 0;
+		if (c >= '0' && c <= '9')
+			aux = c - '0';
+		else if (c >= 'A' && c <= 'F')
+			aux = (c - 'A') + 10;
+
+		ret += aux * pow(16, (int)((s_str - i) - 1));
+	}
+
+	return ret;
+}
\ No newline at end of file
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