String: added nxt_atoul().

This is similar to atoi(3) in usage, except that:

-  It's safe (doesn't have Undefined Behavior).
-  It receives a nxt_str_t instead of a string.
-  The base is 0, not 10.

Errors are reported with the same error codes as in strtou(3bsd), but
they are reported via errno, instead of passing a pointer to an int.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/src/nxt_string.h b/src/nxt_string.h
index 18ea5490..8afdc1e7 100644
--- a/src/nxt_string.h
+++ b/src/nxt_string.h
@@ -161,6 +161,9 @@ 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 unsigned long nxt_atoul(const nxt_str_t *s);
+
+
 extern const uint8_t  nxt_hex2int[256];