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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
commit | 70e9163c9c18e995515598085cb824e554eb7ae7 (patch) | |
tree | a42dc8b2a6c031354bf31472de888bfc8a060132 /lib/xdectoint.c | |
parent | cbf5993c43f49281173f185863577d86bfac6eae (diff) | |
download | coreutils-tarball-master.tar.gz |
coreutils-8.25HEADcoreutils-8.25master
Diffstat (limited to 'lib/xdectoint.c')
-rw-r--r-- | lib/xdectoint.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/lib/xdectoint.c b/lib/xdectoint.c new file mode 100644 index 0000000..db41348 --- /dev/null +++ b/lib/xdectoint.c @@ -0,0 +1,86 @@ +/* Convert decimal strings with bounds checking and exit on error. + + Copyright (C) 2014-2016 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/>. */ + +#include <config.h> + +#include "xdectoint.h" + +#include <errno.h> +#include <inttypes.h> +#include <stdlib.h> + +#include "error.h" +#include "quote.h" +#include "xstrtol.h" + +/* Parse numeric string N_STR of base BASE, and return the value. + Exit on parse error or if MIN or MAX are exceeded. + Strings can have multiplicative SUFFIXES if specified. + ERR is printed along with N_STR on error. */ + +__xdectoint_t +__xnumtoint (const char *n_str, int base, __xdectoint_t min, __xdectoint_t max, + const char *suffixes, const char *err, int err_exit) +{ + strtol_error s_err; + + __xdectoint_t tnum; + s_err = __xstrtol (n_str, NULL, base, &tnum, suffixes); + + if (s_err == LONGINT_OK) + { + if (tnum < min || max < tnum) + { + s_err = LONGINT_OVERFLOW; + /* Use have the INT range as a heuristic to distinguish + type overflow rather than other min/max limits. */ + if (tnum > INT_MAX/2) + errno = EOVERFLOW; +#if __xdectoint_signed + else if (tnum < INT_MIN/2) + errno = EOVERFLOW; +#endif + else + errno = ERANGE; + } + } + else if (s_err == LONGINT_OVERFLOW) + errno = EOVERFLOW; + else if (s_err == LONGINT_INVALID_SUFFIX_CHAR_WITH_OVERFLOW) + errno = 0; /* Don't show ERANGE errors for invalid numbers. */ + + if (s_err != LONGINT_OK) + { + /* EINVAL error message is redundant in this context. */ + error (err_exit ? err_exit : EXIT_FAILURE, errno == EINVAL ? 0 : errno, + "%s: %s", err, quote (n_str)); + } + + return tnum; +} + +/* Parse decimal string N_STR, and return the value. + Exit on parse error or if MIN or MAX are exceeded. + Strings can have multiplicative SUFFIXES if specified. + ERR is printed along with N_STR on error. */ + +__xdectoint_t +__xdectoint (const char *n_str, __xdectoint_t min, __xdectoint_t max, + const char *suffixes, const char *err, int err_exit) +{ + return __xnumtoint (n_str, 10, min, max, suffixes, err, err_exit); +} |