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3052ba56bc
We got the sane_ctype.h headers from git and kept using it so far, but since that code originally came from the kernel sources to the git sources, perhaps its better to just use the one in the kernel, so that we can leverage tools/perf/check_headers.sh to be notified when our copy gets out of sync, i.e. when fixes or goodies are added to the code we've copied. This will help with things like tools/lib/string.c where we want to have more things in common with the kernel, such as strim(), skip_spaces(), etc so as to go on removing the things that we have in tools/perf/util/ and instead using the code in the kernel, indirectly and removing things like EXPORT_SYMBOL(), etc, getting notified when fixes and improvements are made to the original code. Hopefully this also should help with reducing the difference of code hosted in tools/ to the one in the kernel proper. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-7k9868l713wqtgo01xxygn12@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
454 lines
8.8 KiB
C
454 lines
8.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "string2.h"
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <stdlib.h>
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#include <linux/ctype.h>
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const char *graph_dotted_line =
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"---------------------------------------------------------------------"
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"---------------------------------------------------------------------"
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"---------------------------------------------------------------------";
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const char *dots =
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"....................................................................."
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"....................................................................."
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".....................................................................";
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#define K 1024LL
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/*
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* perf_atoll()
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* Parse (\d+)(b|B|kb|KB|mb|MB|gb|GB|tb|TB) (e.g. "256MB")
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* and return its numeric value
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*/
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s64 perf_atoll(const char *str)
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{
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s64 length;
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char *p;
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char c;
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if (!isdigit(str[0]))
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goto out_err;
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length = strtoll(str, &p, 10);
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switch (c = *p++) {
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case 'b': case 'B':
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if (*p)
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goto out_err;
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__fallthrough;
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case '\0':
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return length;
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default:
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goto out_err;
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/* two-letter suffices */
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case 'k': case 'K':
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length <<= 10;
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break;
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case 'm': case 'M':
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length <<= 20;
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break;
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case 'g': case 'G':
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length <<= 30;
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break;
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case 't': case 'T':
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length <<= 40;
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break;
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}
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/* we want the cases to match */
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if (islower(c)) {
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if (strcmp(p, "b") != 0)
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goto out_err;
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} else {
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if (strcmp(p, "B") != 0)
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goto out_err;
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}
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return length;
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out_err:
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return -1;
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}
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/*
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* Helper function for splitting a string into an argv-like array.
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* originally copied from lib/argv_split.c
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*/
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static const char *skip_sep(const char *cp)
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{
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while (*cp && isspace(*cp))
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cp++;
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return cp;
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}
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static const char *skip_arg(const char *cp)
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{
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while (*cp && !isspace(*cp))
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cp++;
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return cp;
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}
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static int count_argc(const char *str)
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{
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int count = 0;
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while (*str) {
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str = skip_sep(str);
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if (*str) {
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count++;
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str = skip_arg(str);
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}
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}
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return count;
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}
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/**
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* argv_free - free an argv
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* @argv - the argument vector to be freed
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*
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* Frees an argv and the strings it points to.
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*/
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void argv_free(char **argv)
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{
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char **p;
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for (p = argv; *p; p++) {
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free(*p);
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*p = NULL;
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}
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free(argv);
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}
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/**
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* argv_split - split a string at whitespace, returning an argv
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* @str: the string to be split
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* @argcp: returned argument count
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*
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* Returns an array of pointers to strings which are split out from
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* @str. This is performed by strictly splitting on white-space; no
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* quote processing is performed. Multiple whitespace characters are
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* considered to be a single argument separator. The returned array
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* is always NULL-terminated. Returns NULL on memory allocation
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* failure.
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*/
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char **argv_split(const char *str, int *argcp)
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{
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int argc = count_argc(str);
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char **argv = calloc(argc + 1, sizeof(*argv));
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char **argvp;
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if (argv == NULL)
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goto out;
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if (argcp)
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*argcp = argc;
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argvp = argv;
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while (*str) {
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str = skip_sep(str);
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if (*str) {
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const char *p = str;
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char *t;
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str = skip_arg(str);
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t = strndup(p, str-p);
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if (t == NULL)
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goto fail;
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*argvp++ = t;
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}
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}
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*argvp = NULL;
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out:
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return argv;
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fail:
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argv_free(argv);
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return NULL;
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}
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/* Character class matching */
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static bool __match_charclass(const char *pat, char c, const char **npat)
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{
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bool complement = false, ret = true;
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if (*pat == '!') {
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complement = true;
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pat++;
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}
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if (*pat++ == c) /* First character is special */
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goto end;
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while (*pat && *pat != ']') { /* Matching */
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if (*pat == '-' && *(pat + 1) != ']') { /* Range */
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if (*(pat - 1) <= c && c <= *(pat + 1))
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goto end;
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if (*(pat - 1) > *(pat + 1))
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goto error;
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pat += 2;
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} else if (*pat++ == c)
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goto end;
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}
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if (!*pat)
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goto error;
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ret = false;
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end:
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while (*pat && *pat != ']') /* Searching closing */
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pat++;
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if (!*pat)
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goto error;
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*npat = pat + 1;
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return complement ? !ret : ret;
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error:
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return false;
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}
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/* Glob/lazy pattern matching */
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static bool __match_glob(const char *str, const char *pat, bool ignore_space,
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bool case_ins)
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{
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while (*str && *pat && *pat != '*') {
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if (ignore_space) {
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/* Ignore spaces for lazy matching */
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if (isspace(*str)) {
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str++;
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continue;
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}
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if (isspace(*pat)) {
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pat++;
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continue;
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}
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}
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if (*pat == '?') { /* Matches any single character */
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str++;
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pat++;
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continue;
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} else if (*pat == '[') /* Character classes/Ranges */
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if (__match_charclass(pat + 1, *str, &pat)) {
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str++;
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continue;
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} else
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return false;
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else if (*pat == '\\') /* Escaped char match as normal char */
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pat++;
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if (case_ins) {
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if (tolower(*str) != tolower(*pat))
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return false;
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} else if (*str != *pat)
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return false;
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str++;
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pat++;
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}
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/* Check wild card */
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if (*pat == '*') {
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while (*pat == '*')
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pat++;
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if (!*pat) /* Tail wild card matches all */
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return true;
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while (*str)
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if (__match_glob(str++, pat, ignore_space, case_ins))
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return true;
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}
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return !*str && !*pat;
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}
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/**
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* strglobmatch - glob expression pattern matching
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* @str: the target string to match
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* @pat: the pattern string to match
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*
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* This returns true if the @str matches @pat. @pat can includes wildcards
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* ('*','?') and character classes ([CHARS], complementation and ranges are
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* also supported). Also, this supports escape character ('\') to use special
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* characters as normal character.
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*
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* Note: if @pat syntax is broken, this always returns false.
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*/
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bool strglobmatch(const char *str, const char *pat)
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{
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return __match_glob(str, pat, false, false);
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}
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bool strglobmatch_nocase(const char *str, const char *pat)
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{
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return __match_glob(str, pat, false, true);
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}
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/**
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* strlazymatch - matching pattern strings lazily with glob pattern
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* @str: the target string to match
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* @pat: the pattern string to match
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*
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* This is similar to strglobmatch, except this ignores spaces in
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* the target string.
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*/
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bool strlazymatch(const char *str, const char *pat)
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{
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return __match_glob(str, pat, true, false);
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}
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/**
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* strtailcmp - Compare the tail of two strings
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* @s1: 1st string to be compared
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* @s2: 2nd string to be compared
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*
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* Return 0 if whole of either string is same as another's tail part.
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*/
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int strtailcmp(const char *s1, const char *s2)
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{
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int i1 = strlen(s1);
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int i2 = strlen(s2);
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while (--i1 >= 0 && --i2 >= 0) {
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if (s1[i1] != s2[i2])
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return s1[i1] - s2[i2];
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}
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return 0;
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}
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/**
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* strxfrchar - Locate and replace character in @s
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* @s: The string to be searched/changed.
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* @from: Source character to be replaced.
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* @to: Destination character.
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*
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* Return pointer to the changed string.
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*/
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char *strxfrchar(char *s, char from, char to)
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{
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char *p = s;
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while ((p = strchr(p, from)) != NULL)
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*p++ = to;
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return s;
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}
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/**
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* ltrim - Removes leading whitespace from @s.
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* @s: The string to be stripped.
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*
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* Return pointer to the first non-whitespace character in @s.
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*/
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char *ltrim(char *s)
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{
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while (isspace(*s))
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s++;
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return s;
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}
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/**
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* rtrim - Removes trailing whitespace from @s.
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* @s: The string to be stripped.
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*
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* Note that the first trailing whitespace is replaced with a %NUL-terminator
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* in the given string @s. Returns @s.
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*/
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char *rtrim(char *s)
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{
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size_t size = strlen(s);
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char *end;
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if (!size)
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return s;
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end = s + size - 1;
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while (end >= s && isspace(*end))
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end--;
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*(end + 1) = '\0';
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return s;
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}
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char *asprintf_expr_inout_ints(const char *var, bool in, size_t nints, int *ints)
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{
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/*
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* FIXME: replace this with an expression using log10() when we
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* find a suitable implementation, maybe the one in the dvb drivers...
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*
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* "%s == %d || " = log10(MAXINT) * 2 + 8 chars for the operators
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*/
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size_t size = nints * 28 + 1; /* \0 */
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size_t i, printed = 0;
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char *expr = malloc(size);
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if (expr) {
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const char *or_and = "||", *eq_neq = "==";
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char *e = expr;
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if (!in) {
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or_and = "&&";
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eq_neq = "!=";
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}
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for (i = 0; i < nints; ++i) {
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if (printed == size)
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goto out_err_overflow;
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if (i > 0)
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printed += scnprintf(e + printed, size - printed, " %s ", or_and);
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printed += scnprintf(e + printed, size - printed,
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"%s %s %d", var, eq_neq, ints[i]);
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}
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}
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return expr;
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out_err_overflow:
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free(expr);
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return NULL;
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}
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/* Like strpbrk(), but not break if it is right after a backslash (escaped) */
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char *strpbrk_esc(char *str, const char *stopset)
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{
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char *ptr;
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do {
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ptr = strpbrk(str, stopset);
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if (ptr == str ||
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(ptr == str + 1 && *(ptr - 1) != '\\'))
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break;
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str = ptr + 1;
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} while (ptr && *(ptr - 1) == '\\' && *(ptr - 2) != '\\');
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return ptr;
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}
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/* Like strdup, but do not copy a single backslash */
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char *strdup_esc(const char *str)
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{
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char *s, *d, *p, *ret = strdup(str);
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if (!ret)
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return NULL;
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d = strchr(ret, '\\');
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if (!d)
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return ret;
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s = d + 1;
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do {
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if (*s == '\0') {
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*d = '\0';
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break;
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}
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p = strchr(s + 1, '\\');
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if (p) {
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memmove(d, s, p - s);
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d += p - s;
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s = p + 1;
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} else
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memmove(d, s, strlen(s) + 1);
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} while (p);
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return ret;
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}
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