diff options
Diffstat (limited to 'libbb/xgetularg.c')
-rw-r--r-- | libbb/xgetularg.c | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/libbb/xgetularg.c b/libbb/xgetularg.c deleted file mode 100644 index 17ba581..0000000 --- a/libbb/xgetularg.c +++ /dev/null @@ -1,127 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * xgetularg* implementations for busybox - * - * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org> - * - * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. - */ - -#include <stdlib.h> -#include <string.h> -#include <limits.h> -#include <ctype.h> -#include <errno.h> -#include <assert.h> -#include "libbb.h" - -unsigned long bb_xgetularg_bnd_sfx(const char *arg, int base, - unsigned long lower, - unsigned long upper, - const struct suffix_mult *suffixes) -{ - unsigned long r; - int old_errno; - char *e; - - assert(arg); - - /* Disallow '-' and any leading whitespace. Speed isn't critical here - * since we're parsing commandline args. So make sure we get the - * actual isspace function rather than a larger macro implementaion. */ - if ((*arg == '-') || (isspace)(*arg)) { - bb_show_usage(); - } - - /* Since this is a lib function, we're not allowed to reset errno to 0. - * Doing so could break an app that is deferring checking of errno. - * So, save the old value so that we can restore it if successful. */ - old_errno = errno; - errno = 0; - r = strtoul(arg, &e, base); - /* Do the initial validity check. Note: The standards do not - * guarantee that errno is set if no digits were found. So we - * must test for this explicitly. */ - if (errno || (arg == e)) { /* error or no digits */ - bb_show_usage(); - } - errno = old_errno; /* Ok. So restore errno. */ - - /* Do optional suffix parsing. Allow 'empty' suffix tables. - * Note that we also all nul suffixes with associated multipliers, - * to allow for scaling of the arg by some default multiplier. */ - - if (suffixes) { - while (suffixes->suffix) { - if (strcmp(suffixes->suffix, e) == 0) { - if (ULONG_MAX / suffixes->mult < r) { /* Overflow! */ - bb_show_usage(); - } - ++e; - r *= suffixes->mult; - break; - } - ++suffixes; - } - } - - /* Finally, check for illegal trailing chars and range limits. */ - /* Note: although we allow leading space (via stroul), trailing space - * is an error. It would be easy enough to allow though if desired. */ - if (*e || (r < lower) || (r > upper)) { - bb_show_usage(); - } - - return r; -} - -long bb_xgetlarg_bnd_sfx(const char *arg, int base, - long lower, - long upper, - const struct suffix_mult *suffixes) -{ - unsigned long u = LONG_MAX; - long r; - const char *p = arg; - - if ((*p == '-') && (p[1] != '+')) { - ++p; - ++u; /* two's complement */ - } - - r = bb_xgetularg_bnd_sfx(p, base, 0, u, suffixes); - - if (*arg == '-') { - r = -r; - } - - if ((r < lower) || (r > upper)) { - bb_show_usage(); - } - - return r; -} - -long bb_xgetlarg10_sfx(const char *arg, const struct suffix_mult *suffixes) -{ - return bb_xgetlarg_bnd_sfx(arg, 10, LONG_MIN, LONG_MAX, suffixes); -} - -unsigned long bb_xgetularg_bnd(const char *arg, int base, - unsigned long lower, - unsigned long upper) -{ - return bb_xgetularg_bnd_sfx(arg, base, lower, upper, NULL); -} - -unsigned long bb_xgetularg10_bnd(const char *arg, - unsigned long lower, - unsigned long upper) -{ - return bb_xgetularg_bnd(arg, 10, lower, upper); -} - -unsigned long bb_xgetularg10(const char *arg) -{ - return bb_xgetularg10_bnd(arg, 0, ULONG_MAX); -} |