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Diffstat (limited to 'tiff/port/_strtoul.h')
| -rw-r--r-- | tiff/port/_strtoul.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/tiff/port/_strtoul.h b/tiff/port/_strtoul.h new file mode 100644 index 00000000..5cb62168 --- /dev/null +++ b/tiff/port/_strtoul.h @@ -0,0 +1,127 @@ +/* $NetBSD: _strtoul.h,v 1.11 2017/07/06 21:08:44 joerg Exp $ */ + +/*- + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * Original version ID: + * NetBSD: src/lib/libc/locale/_wcstoul.h,v 1.2 2003/08/07 16:43:03 agc Exp + */ + +#include <assert.h> + +/* + * function template for strtoul, strtoull and strtoumax. + * + * parameters: + * _FUNCNAME : function name + * __UINT : return type + * __UINT_MAX : upper limit of the return type + */ +__UINT +_FUNCNAME(const char *nptr, char **endptr, int base) +{ + const char *s; + __UINT acc, cutoff; + unsigned char c; + int i, neg, any, cutlim; + + assert(nptr != NULL); + /* endptr may be NULL */ + + /* check base value */ + if (base && (base < 2 || base > 36)) { + errno = EINVAL; + if (endptr != NULL) + /* LINTED interface specification */ + *endptr = (char *)(nptr); + return 0; + } + + /* + * Skip white space and pick up leading +/- sign if any. + * If base is 0, allow 0x for hex and 0 for octal, else + * assume decimal; if base is already 16, allow 0x. + */ + s = nptr; + do { + c = *s++; + } while (isspace(c)); + if (c == '-') { + neg = 1; + c = *s++; + } else { + neg = 0; + if (c == '+') + c = *s++; + } + if ((base == 0 || base == 16) && + c == '0' && (*s == 'x' || *s == 'X') && + ((s[1] >= '0' && s[1] <= '9') || + (s[1] >= 'a' && s[1] <= 'f') || + (s[1] >= 'A' && s[1] <= 'F'))) { + c = s[1]; + s += 2; + base = 16; + } else if (base == 0) + base = (c == '0' ? 8 : 10); + + /* + * See strtol for comments as to the logic used. + */ + cutoff = ((__UINT)__UINT_MAX / (__UINT)base); + cutlim = (int)((__UINT)__UINT_MAX % (__UINT)base); + for (acc = 0, any = 0;; c = *s++) { + if (c >= '0' && c <= '9') + i = c - '0'; + else if (c >= 'a' && c <= 'z') + i = (c - 'a') + 10; + else if (c >= 'A' && c <= 'Z') + i = (c - 'A') + 10; + else + break; + if (i >= base) + break; + if (any < 0) + continue; + if (acc > cutoff || (acc == cutoff && i > cutlim)) { + acc = __UINT_MAX; + any = -1; + errno = ERANGE; + } else { + any = 1; + acc *= (__UINT)base; + acc += i; + } + } + if (neg && any > 0) + acc = -acc; + if (endptr != NULL) + /* LINTED interface specification */ + *endptr = (char *)(any ? s - 1 : nptr); + return(acc); +} |