String: added strto[u]l(3) variants for nxt_str_t.

They're really more inspired in the API of BSD's strto[iu](3), but use
long just to keep it simple, instead of intmax_t, and since they wrap
strtol(3), I called them like it.

Signed-off-by: Alejandro Colomar <alx@nginx.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

2 files changed, 47 insertions, 0 deletions

diff --git a/src/nxt_string.c b/src/nxt_string.c
index 1ca595a1..e660b367 100644
--- a/src/nxt_string.c
+++ b/src/nxt_string.c
@@ -1,11 +1,20 @@
 
 /*
  * Copyright (C) Igor Sysoev
+ * Copyright (C) Alejandro Colomar
  * Copyright (C) NGINX, Inc.
  */
 
 #include <nxt_main.h>
 
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <nxt_unit_cdefs.h>
+
+#include "nxt_string.h"
+
 
 nxt_str_t *
 nxt_str_alloc(nxt_mp_t *mp, size_t length)
@@ -842,3 +851,30 @@ nxt_base64_decode(u_char *dst, u_char *src, size_t length)
 
     return (p - dst);
 }
+
+
+long
+nxt_ustrtol(const nxt_str_t *s, nxt_int_t *err)
+{
+    char  *p, *endptr;
+    long  l;
+    char  buf[BUFSIZ];
+
+    if (s == NULL || s->length >= nxt_nitems(buf)) {
+        *err = NXT_ERROR;
+        return -1;
+    }
+
+    p = nxt_cpymem(buf, s->start, s->length);
+    *p = '\0';
+
+    errno = 0;
+    l = strtol(buf, &endptr, 0);
+
+    if (errno != 0 || endptr == buf) {
+        *err = NXT_ERROR;
+        return -1;
+    }
+
+    return l;
+}
diff --git a/src/nxt_string.h b/src/nxt_string.h
index 18ea5490..72e545ce 100644
--- a/src/nxt_string.h
+++ b/src/nxt_string.h
@@ -161,7 +161,18 @@ NXT_EXPORT nxt_bool_t nxt_is_complex_uri_encoded(u_char *s, size_t length);
 
 NXT_EXPORT ssize_t nxt_base64_decode(u_char *dst, u_char *src, size_t length);
 
+NXT_EXPORT long nxt_ustrtol(const nxt_str_t *s, int *err);
+nxt_inline unsigned long nxt_ustrtoul(const nxt_str_t *s, int *err);
+
+
 extern const uint8_t  nxt_hex2int[256];
 
 
+nxt_inline unsigned long
+nxt_ustrtoul(const nxt_str_t *s, int *err)
+{
+    return nxt_ustrtol(s, err);
+}
+
+
 #endif /* _NXT_STRING_H_INCLUDED_ */