1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
22 ***************************************************************************/
25 #include "strtoofft.h"
30 * In the ISO C standard (IEEE Std 1003.1), there is a strtoimax() function we
31 * could use in case strtoll() doesn't exist... See
32 * http://www.opengroup.org/onlinepubs/009695399/functions/strtoimax.html
35 #ifdef NEED_CURL_STRTOLL
40 static int get_char(char c, int base);
43 * Emulated version of the strtoll function. This extracts a long long
44 * value from the given input string and returns it.
47 curlx_strtoll(const char *nptr, char **endptr, int base)
56 /* Skip leading whitespace. */
58 while (isspace((int)end[0])) {
62 /* Handle the sign, if any. */
67 else if (end[0] == '+') {
70 else if (end[0] == '\0') {
71 /* We had nothing but perhaps some whitespace -- there was no number. */
78 /* Handle special beginnings, if present and allowed. */
79 if (end[0] == '0' && end[1] == 'x') {
80 if (base == 16 || base == 0) {
85 else if (end[0] == '0') {
86 if (base == 8 || base == 0) {
92 /* Matching strtol, if the base is 0 and it doesn't look like
93 * the number is octal or hex, we assume it's base 10.
99 /* Loop handling digits. */
102 for (i = get_char(end[0], base);
104 end++, i = get_char(end[0], base)) {
105 newval = base * value + i;
106 if (newval < value) {
107 /* We've overflowed. */
123 value = CURL_LLONG_MIN;
125 value = CURL_LLONG_MAX;
137 * Returns the value of c in the given base, or -1 if c cannot
138 * be interpreted properly in that base (i.e., is out of range,
141 * @param c the character to interpret according to base
142 * @param base the base in which to interpret c
144 * @return the value of c in base, or -1 if c isn't in range
146 static int get_char(char c, int base)
149 if (c <= '9' && c >= '0') {
152 else if (c <= 'Z' && c >= 'A') {
153 value = c - 'A' + 10;
155 else if (c <= 'z' && c >= 'a') {
156 value = c - 'a' + 10;
165 #endif /* Only present if we need strtoll, but don't have it. */