libc-functions: hacked strtol and atoi

Such stuff is needed for command line parsing. Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

libc-functions: hacked strtol and atoi
Such stuff is needed for command line parsing. Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
8f8cda9d · Alessandro Rubini · 59409d99 · 8f8cda9d · 8f8cda9d
Commit 8f8cda9d authored Feb 28, 2013 by Alessandro Rubini
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lib.h include/ppsi/lib.h +1 -0

libc-functions.c lib/libc-functions.c +23 -0

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--- a/include/ppsi/lib.h
+++ b/include/ppsi/lib.h
@@ -7,6 +7,7 @@
 #include <string.h>

 extern void pp_puts(const char *s);
+extern int atoi(const char *s);

 extern uint32_t __div64_32(uint64_t *n, uint32_t base);


--- a/lib/libc-functions.c
+++ b/lib/libc-functions.c
@@ -69,3 +69,26 @@ char *strcpy(char *s1, const char *s2)
 		;
 	return s1;
 }
+
+/* for strtol even uClibc is too heavy. Let's rewrite some hack */
+long int strtol(const char *s, char **end, int base)
+{
+	long res = 0;
+
+	if (!base)
+		base = 10;
+	while (*s) {
+		if (end)
+			*end = (void *)s;
+		/* we only use it for cmdline: avoid alpha digits */
+		if (base > 10 || *s < '0' || *s >= '0' + base) {
+			return res;
+		}
+		res = res * base + *(s++) - '0';
+	}
+	return res;
+}
+int atoi(const char *s)
+{
+	return strtol(s, NULL, 10);
+}