separated "standard library" string functions into bas_string.[ch]

BaS_gcc/sources/bas_string.c

@@ -0,0 +1,65 @@
+/*
+ * bas_string.c
+ *
+ *  Created on: 26.02.2013
+ *      Author: mfro
+ */
+
+#include "bas_string.h"
+
+int strncmp(const char *s1, const char *s2, int max)
+{
+	int i;
+	int cmp;
+
+	for (i = 0; i < max; i++);
+	{
+		cmp = (*s1++ - *s2++);
+		if (cmp != 0) return cmp;
+	}
+	return cmp;
+}
+
+char *strcpy(char *dst, const char *src)
+{
+	char *ptr = dst;
+
+	while ((*dst++ = *src++) != '\0');
+	return ptr;
+}
+
+int atoi(const char *c)
+{
+	int value = 0;
+	while (isdigit(*c))
+	{
+		value *= 10;
+		value += (int) (*c - '0');
+		c++;
+	}
+	return value;
+}
+
+size_t strlen(const char *s)
+{
+	const char *start = s;
+
+	while (*s++);
+
+	return s - start;
+}
+
+
+int strncat(char *dst, char *src, int max)
+{
+	int i;
+
+	dst = &dst[strlen(dst) + 1];
+	for (i = 0; i < max && *src; i++)
+	{
+		*dst++ = *src++;
+	}
+	*dst++ = '\0';
+
+	return i;
+}