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Diffstat (limited to 'libcurl/src/lib/strtoofft.c')
| -rw-r--r-- | libcurl/src/lib/strtoofft.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/libcurl/src/lib/strtoofft.c b/libcurl/src/lib/strtoofft.c new file mode 100644 index 0000000..e6da0af --- /dev/null +++ b/libcurl/src/lib/strtoofft.c @@ -0,0 +1,188 @@ +/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#include "strtoofft.h"
+
+/*
+ * NOTE:
+ *
+ * In the ISO C standard (IEEE Std 1003.1), there is a strtoimax() function we
+ * could use in case strtoll() doesn't exist... See
+ * http://www.opengroup.org/onlinepubs/009695399/functions/strtoimax.html
+ */
+
+#ifdef NEED_CURL_STRTOLL
+
+/* Range tests can be used for alphanum decoding if characters are consecutive,
+ like in ASCII. Else an array is scanned. Determine this condition now. */
+
+#if('9' - '0') != 9 || ('Z' - 'A') != 25 || ('z' - 'a') != 25
+
+#define NO_RANGE_TEST
+
+static const char valchars[] =
+ "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+#endif
+
+static int get_char(char c, int base);
+
+/**
+ * Emulated version of the strtoll function. This extracts a long long
+ * value from the given input string and returns it.
+ */
+CURL_STATIC curl_off_t
+curlx_strtoll(const char *nptr, char **endptr, int base)
+{
+ char *end;
+ int is_negative = 0;
+ int overflow;
+ int i;
+ curl_off_t value = 0;
+ curl_off_t newval;
+
+ /* Skip leading whitespace. */
+ end = (char *)nptr;
+ while(ISSPACE(end[0])) {
+ end++;
+ }
+
+ /* Handle the sign, if any. */
+ if(end[0] == '-') {
+ is_negative = 1;
+ end++;
+ }
+ else if(end[0] == '+') {
+ end++;
+ }
+ else if(end[0] == '\0') {
+ /* We had nothing but perhaps some whitespace -- there was no number. */
+ if(endptr) {
+ *endptr = end;
+ }
+ return 0;
+ }
+
+ /* Handle special beginnings, if present and allowed. */
+ if(end[0] == '0' && end[1] == 'x') {
+ if(base == 16 || base == 0) {
+ end += 2;
+ base = 16;
+ }
+ }
+ else if(end[0] == '0') {
+ if(base == 8 || base == 0) {
+ end++;
+ base = 8;
+ }
+ }
+
+ /* Matching strtol, if the base is 0 and it doesn't look like
+ * the number is octal or hex, we assume it's base 10.
+ */
+ if(base == 0) {
+ base = 10;
+ }
+
+ /* Loop handling digits. */
+ value = 0;
+ overflow = 0;
+ for(i = get_char(end[0], base);
+ i != -1;
+ end++, i = get_char(end[0], base)) {
+ newval = base * value + i;
+ if(newval < value) {
+ /* We've overflowed. */
+ overflow = 1;
+ break;
+ }
+ else
+ value = newval;
+ }
+
+ if(!overflow) {
+ if(is_negative) {
+ /* Fix the sign. */
+ value *= -1;
+ }
+ }
+ else {
+ if(is_negative)
+ value = CURL_OFF_T_MIN;
+ else
+ value = CURL_OFF_T_MAX;
+
+ SET_ERRNO(ERANGE);
+ }
+
+ if(endptr)
+ *endptr = end;
+
+ return value;
+}
+
+/**
+ * Returns the value of c in the given base, or -1 if c cannot
+ * be interpreted properly in that base (i.e., is out of range,
+ * is a null, etc.).
+ *
+ * @param c the character to interpret according to base
+ * @param base the base in which to interpret c
+ *
+ * @return the value of c in base, or -1 if c isn't in range
+ */
+static int get_char(char c, int base)
+{
+#ifndef NO_RANGE_TEST
+ int value = -1;
+ if(c <= '9' && c >= '0') {
+ value = c - '0';
+ }
+ else if(c <= 'Z' && c >= 'A') {
+ value = c - 'A' + 10;
+ }
+ else if(c <= 'z' && c >= 'a') {
+ value = c - 'a' + 10;
+ }
+#else
+ const char * cp;
+ int value;
+
+ cp = memchr(valchars, c, 10 + 26 + 26);
+
+ if(!cp)
+ return -1;
+
+ value = cp - valchars;
+
+ if(value >= 10 + 26)
+ value -= 26; /* Lowercase. */
+#endif
+
+ if(value >= base) {
+ value = -1;
+ }
+
+ return value;
+}
+#endif /* Only present if we need strtoll, but don't have it. */
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