Mercurial > gnulib
view lib/xstrtol.c @ 17655:889867abe1ae
mbsstr, quotearg, xstrtol: pacify IRIX 6.5 cc
These were found when building the latest grep snapshot on IRIX 6.5.
* lib/mbsstr.c (knuth_morris_pratt_multibyte): Break "a=b=c;" into
"b=c; a=b;", since IRIX 6.5 cc complains about the former if b is
never used later.
* lib/quotearg.c (quoting_options_from_style):
* lib/xstrtol.c (__xstrtol):
Use enum instead of 0, to pacify IRIX 6.5 cc.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Sun, 11 May 2014 00:36:37 -0700 |
parents | 344018b6e5d7 |
children | 39c9960ea17b |
line wrap: on
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/* A more useful interface to strtol. Copyright (C) 1995-1996, 1998-2001, 2003-2007, 2009-2014 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* Written by Jim Meyering. */ #ifndef __strtol # define __strtol strtol # define __strtol_t long int # define __xstrtol xstrtol # define STRTOL_T_MINIMUM LONG_MIN # define STRTOL_T_MAXIMUM LONG_MAX #endif #include <config.h> #include "xstrtol.h" /* Some pre-ANSI implementations (e.g. SunOS 4) need stderr defined if assertion checking is enabled. */ #include <stdio.h> #include <assert.h> #include <ctype.h> #include <errno.h> #include <limits.h> #include <stdlib.h> #include <string.h> #include "intprops.h" /* xstrtoll.c and xstrtoull.c, which include this file, require that ULLONG_MAX, LLONG_MAX, LLONG_MIN are defined, but <limits.h> does not define them on all platforms. */ #ifndef ULLONG_MAX # define ULLONG_MAX TYPE_MAXIMUM (unsigned long long) #endif #ifndef LLONG_MAX # define LLONG_MAX TYPE_MAXIMUM (long long int) #endif #ifndef LLONG_MIN # define LLONG_MIN TYPE_MINIMUM (long long int) #endif static strtol_error bkm_scale (__strtol_t *x, int scale_factor) { if (TYPE_SIGNED (__strtol_t) && *x < STRTOL_T_MINIMUM / scale_factor) { *x = STRTOL_T_MINIMUM; return LONGINT_OVERFLOW; } if (STRTOL_T_MAXIMUM / scale_factor < *x) { *x = STRTOL_T_MAXIMUM; return LONGINT_OVERFLOW; } *x *= scale_factor; return LONGINT_OK; } static strtol_error bkm_scale_by_power (__strtol_t *x, int base, int power) { strtol_error err = LONGINT_OK; while (power--) err |= bkm_scale (x, base); return err; } /* FIXME: comment. */ strtol_error __xstrtol (const char *s, char **ptr, int strtol_base, __strtol_t *val, const char *valid_suffixes) { char *t_ptr; char **p; __strtol_t tmp; strtol_error err = LONGINT_OK; assert (0 <= strtol_base && strtol_base <= 36); p = (ptr ? ptr : &t_ptr); if (! TYPE_SIGNED (__strtol_t)) { const char *q = s; unsigned char ch = *q; while (isspace (ch)) ch = *++q; if (ch == '-') return LONGINT_INVALID; } errno = 0; tmp = __strtol (s, p, strtol_base); if (*p == s) { /* If there is no number but there is a valid suffix, assume the number is 1. The string is invalid otherwise. */ if (valid_suffixes && **p && strchr (valid_suffixes, **p)) tmp = 1; else return LONGINT_INVALID; } else if (errno != 0) { if (errno != ERANGE) return LONGINT_INVALID; err = LONGINT_OVERFLOW; } /* Let valid_suffixes == NULL mean "allow any suffix". */ /* FIXME: update all callers except the ones that allow suffixes after the number, changing last parameter NULL to "". */ if (!valid_suffixes) { *val = tmp; return err; } if (**p != '\0') { int base = 1024; int suffixes = 1; strtol_error overflow; if (!strchr (valid_suffixes, **p)) { *val = tmp; return err | LONGINT_INVALID_SUFFIX_CHAR; } if (strchr (valid_suffixes, '0')) { /* The "valid suffix" '0' is a special flag meaning that an optional second suffix is allowed, which can change the base. A suffix "B" (e.g. "100MB") stands for a power of 1000, whereas a suffix "iB" (e.g. "100MiB") stands for a power of 1024. If no suffix (e.g. "100M"), assume power-of-1024. */ switch (p[0][1]) { case 'i': if (p[0][2] == 'B') suffixes += 2; break; case 'B': case 'D': /* 'D' is obsolescent */ base = 1000; suffixes++; break; } } switch (**p) { case 'b': overflow = bkm_scale (&tmp, 512); break; case 'B': overflow = bkm_scale (&tmp, 1024); break; case 'c': overflow = LONGINT_OK; break; case 'E': /* exa or exbi */ overflow = bkm_scale_by_power (&tmp, base, 6); break; case 'G': /* giga or gibi */ case 'g': /* 'g' is undocumented; for compatibility only */ overflow = bkm_scale_by_power (&tmp, base, 3); break; case 'k': /* kilo */ case 'K': /* kibi */ overflow = bkm_scale_by_power (&tmp, base, 1); break; case 'M': /* mega or mebi */ case 'm': /* 'm' is undocumented; for compatibility only */ overflow = bkm_scale_by_power (&tmp, base, 2); break; case 'P': /* peta or pebi */ overflow = bkm_scale_by_power (&tmp, base, 5); break; case 'T': /* tera or tebi */ case 't': /* 't' is undocumented; for compatibility only */ overflow = bkm_scale_by_power (&tmp, base, 4); break; case 'w': overflow = bkm_scale (&tmp, 2); break; case 'Y': /* yotta or 2**80 */ overflow = bkm_scale_by_power (&tmp, base, 8); break; case 'Z': /* zetta or 2**70 */ overflow = bkm_scale_by_power (&tmp, base, 7); break; default: *val = tmp; return err | LONGINT_INVALID_SUFFIX_CHAR; } err |= overflow; *p += suffixes; if (**p) err |= LONGINT_INVALID_SUFFIX_CHAR; } *val = tmp; return err; }