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https://github.com/asterisk/asterisk.git
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def6bbc96b
Added a conversion for umax (largest maximum sized integer allowed). Adjusted the other current conversion functions (uint and ulong) to be derivatives of the umax conversion since they are simply subsets of umax. Also made the negative check move the pointer on spaces since strtoumax does it anyways. Change-Id: I56c2ef2629d49b524c8df58af12951c181f81f08
93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2017, Digium, Inc.
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Conversion utility functions
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include "asterisk/conversions.h"
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static int str_is_negative(const char **str)
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{
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/*
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* Ignore any preceding white space. It's okay to move the pointer here
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* since the converting function would do the same, i.e. skip white space.
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*/
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while (isspace(**str)) ++*str;
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return **str == '-';
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}
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int ast_str_to_uint(const char *str, unsigned int *res)
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{
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uintmax_t val;
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if (ast_str_to_umax(str, &val) || val > UINT_MAX) {
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return -1;
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}
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*res = val;
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return 0;
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}
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int ast_str_to_ulong(const char *str, unsigned long *res)
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{
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uintmax_t val;
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if (ast_str_to_umax(str, &val) || val > ULONG_MAX) {
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return -1;
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}
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*res = val;
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return 0;
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}
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int ast_str_to_umax(const char *str, uintmax_t *res)
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{
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char *end;
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uintmax_t val;
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if (!str || str_is_negative(&str)) {
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return -1;
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}
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errno = 0;
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val = strtoumax(str, &end, 0);
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/*
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* If str equals end then no digits were found. If end is not pointing to
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* a null character then the string contained some numbers that could be
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* converted, but some characters that could not, which we'll consider
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* invalid.
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*/
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if ((str == end || *end != '\0' || (errno == ERANGE && val == UINTMAX_MAX))) {
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return -1;
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}
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*res = val;
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return 0;
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}
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