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author | Baptiste Daroussin <bapt@FreeBSD.org> | 2015-07-29 06:23:06 +0000 |
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committer | Baptiste Daroussin <bapt@FreeBSD.org> | 2015-07-29 06:23:06 +0000 |
commit | cd8a460e112ecca96b7c98be0466cef118670798 (patch) | |
tree | 5e1b5f34cd408fc584ab21bf3bce516915e448cc | |
parent | 0fd55c6858b1ed5f985845d4fa4c97efef3f363e (diff) | |
download | pw-darwin-cd8a460e112ecca96b7c98be0466cef118670798.tar.gz pw-darwin-cd8a460e112ecca96b7c98be0466cef118670798.tar.zst pw-darwin-cd8a460e112ecca96b7c98be0466cef118670798.zip |
Actually add the new code
-rw-r--r-- | pw/strtounum.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/pw/strtounum.c b/pw/strtounum.c new file mode 100644 index 0000000..9687795 --- /dev/null +++ b/pw/strtounum.c @@ -0,0 +1,73 @@ +/*- + * Copyright (C) Baptiste Daroussin <bapt@FreeBSD.org> + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT 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 DAVID L. NUGENT 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <errno.h> +#include <inttypes.h> +#include <limits.h> +#include <stdlib.h> + +#include "pw.h" + +#define INVALID "invalid" +#define TOOSMALL "too small" +#define TOOLARGE "too large" + +uintmax_t +strtounum(const char *numstr, uintmax_t minval, uintmax_t maxval, + const char **errstrp) +{ + uintmax_t ret = 0; + char *ep; + + if (minval > maxval) { + errno = EINVAL; + if (errstrp != NULL) + *errstrp = INVALID; + return (0); + } + + ret = strtoumax(numstr, &ep, 10); + if (errno == EINVAL || numstr == ep || *ep != '\0') { + errno = EINVAL; + if (errstrp != NULL) + *errstrp = INVALID; + return (0); + } else if ((ret == 0 && errno == ERANGE) || ret < minval) { + errno = ERANGE; + if (errstrp != NULL) + *errstrp = TOOSMALL; + return (0); + } else if ((ret == UINTMAX_MAX && errno == ERANGE) || ret > maxval) { + errno = ERANGE; + if (errstrp != NULL) + *errstrp = TOOLARGE; + return (0); + } + + return (ret); +} |