427 lines
11 KiB
C
427 lines
11 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#include <curl/curl.h>
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#include "curl_fnmatch.h"
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#include "curl_memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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#define CURLFNM_CHARSET_LEN (sizeof(char) * 256)
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#define CURLFNM_CHSET_SIZE (CURLFNM_CHARSET_LEN + 15)
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#define CURLFNM_NEGATE CURLFNM_CHARSET_LEN
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#define CURLFNM_ALNUM (CURLFNM_CHARSET_LEN + 1)
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#define CURLFNM_DIGIT (CURLFNM_CHARSET_LEN + 2)
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#define CURLFNM_XDIGIT (CURLFNM_CHARSET_LEN + 3)
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#define CURLFNM_ALPHA (CURLFNM_CHARSET_LEN + 4)
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#define CURLFNM_PRINT (CURLFNM_CHARSET_LEN + 5)
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#define CURLFNM_BLANK (CURLFNM_CHARSET_LEN + 6)
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#define CURLFNM_LOWER (CURLFNM_CHARSET_LEN + 7)
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#define CURLFNM_GRAPH (CURLFNM_CHARSET_LEN + 8)
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#define CURLFNM_SPACE (CURLFNM_CHARSET_LEN + 9)
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#define CURLFNM_UPPER (CURLFNM_CHARSET_LEN + 10)
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typedef enum {
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CURLFNM_LOOP_DEFAULT = 0,
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CURLFNM_LOOP_BACKSLASH
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} loop_state;
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typedef enum {
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CURLFNM_SCHS_DEFAULT = 0,
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CURLFNM_SCHS_MAYRANGE,
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CURLFNM_SCHS_MAYRANGE2,
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CURLFNM_SCHS_RIGHTBR,
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CURLFNM_SCHS_RIGHTBRLEFTBR
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} setcharset_state;
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typedef enum {
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CURLFNM_PKW_INIT = 0,
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CURLFNM_PKW_DDOT
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} parsekey_state;
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#define SETCHARSET_OK 1
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#define SETCHARSET_FAIL 0
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static int parsekeyword(unsigned char **pattern, unsigned char *charset)
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{
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parsekey_state state = CURLFNM_PKW_INIT;
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#define KEYLEN 10
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char keyword[KEYLEN] = { 0 };
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int found = FALSE;
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int i;
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unsigned char *p = *pattern;
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for(i = 0; !found; i++) {
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char c = *p++;
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if(i >= KEYLEN)
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return SETCHARSET_FAIL;
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switch(state) {
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case CURLFNM_PKW_INIT:
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if(ISALPHA(c) && ISLOWER(c))
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keyword[i] = c;
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else if(c == ':')
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state = CURLFNM_PKW_DDOT;
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else
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return 0;
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break;
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case CURLFNM_PKW_DDOT:
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if(c == ']')
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found = TRUE;
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else
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return SETCHARSET_FAIL;
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}
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}
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#undef KEYLEN
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*pattern = p; /* move caller's pattern pointer */
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if(strcmp(keyword, "digit") == 0)
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charset[CURLFNM_DIGIT] = 1;
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else if(strcmp(keyword, "alnum") == 0)
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charset[CURLFNM_ALNUM] = 1;
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else if(strcmp(keyword, "alpha") == 0)
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charset[CURLFNM_ALPHA] = 1;
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else if(strcmp(keyword, "xdigit") == 0)
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charset[CURLFNM_XDIGIT] = 1;
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else if(strcmp(keyword, "print") == 0)
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charset[CURLFNM_PRINT] = 1;
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else if(strcmp(keyword, "graph") == 0)
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charset[CURLFNM_GRAPH] = 1;
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else if(strcmp(keyword, "space") == 0)
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charset[CURLFNM_SPACE] = 1;
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else if(strcmp(keyword, "blank") == 0)
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charset[CURLFNM_BLANK] = 1;
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else if(strcmp(keyword, "upper") == 0)
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charset[CURLFNM_UPPER] = 1;
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else if(strcmp(keyword, "lower") == 0)
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charset[CURLFNM_LOWER] = 1;
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else
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return SETCHARSET_FAIL;
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return SETCHARSET_OK;
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}
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/* returns 1 (true) if pattern is OK, 0 if is bad ("p" is pattern pointer) */
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static int setcharset(unsigned char **p, unsigned char *charset)
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{
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setcharset_state state = CURLFNM_SCHS_DEFAULT;
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unsigned char rangestart = 0;
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unsigned char lastchar = 0;
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bool something_found = FALSE;
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unsigned char c;
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for(;;) {
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c = **p;
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switch(state) {
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case CURLFNM_SCHS_DEFAULT:
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if(ISALNUM(c)) { /* ASCII value */
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rangestart = c;
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charset[c] = 1;
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(*p)++;
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state = CURLFNM_SCHS_MAYRANGE;
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something_found = TRUE;
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}
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else if(c == ']') {
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if(something_found)
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return SETCHARSET_OK;
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else
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something_found = TRUE;
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state = CURLFNM_SCHS_RIGHTBR;
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charset[c] = 1;
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(*p)++;
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}
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else if(c == '[') {
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char c2 = *((*p)+1);
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if(c2 == ':') { /* there has to be a keyword */
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(*p) += 2;
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if(parsekeyword(p, charset)) {
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state = CURLFNM_SCHS_DEFAULT;
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}
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else
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return SETCHARSET_FAIL;
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}
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else {
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charset[c] = 1;
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(*p)++;
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}
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something_found = TRUE;
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}
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else if(c == '?' || c == '*') {
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something_found = TRUE;
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charset[c] = 1;
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(*p)++;
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}
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else if(c == '^' || c == '!') {
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if(!something_found) {
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if(charset[CURLFNM_NEGATE]) {
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charset[c] = 1;
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something_found = TRUE;
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}
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else
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charset[CURLFNM_NEGATE] = 1; /* negate charset */
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}
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else
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charset[c] = 1;
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(*p)++;
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}
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else if(c == '\\') {
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c = *(++(*p));
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if(ISPRINT((c))) {
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something_found = TRUE;
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state = CURLFNM_SCHS_MAYRANGE;
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charset[c] = 1;
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rangestart = c;
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(*p)++;
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}
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else
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return SETCHARSET_FAIL;
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}
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else if(c == '\0') {
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return SETCHARSET_FAIL;
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}
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else {
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charset[c] = 1;
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(*p)++;
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something_found = TRUE;
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}
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break;
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case CURLFNM_SCHS_MAYRANGE:
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if(c == '-') {
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charset[c] = 1;
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(*p)++;
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lastchar = '-';
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state = CURLFNM_SCHS_MAYRANGE2;
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}
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else if(c == '[') {
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state = CURLFNM_SCHS_DEFAULT;
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}
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else if(ISALNUM(c)) {
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charset[c] = 1;
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(*p)++;
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}
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else if(c == '\\') {
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c = *(++(*p));
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if(ISPRINT(c)) {
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charset[c] = 1;
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(*p)++;
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}
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else
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return SETCHARSET_FAIL;
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}
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else if(c == ']') {
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return SETCHARSET_OK;
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}
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else
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return SETCHARSET_FAIL;
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break;
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case CURLFNM_SCHS_MAYRANGE2:
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if(c == '\\') {
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c = *(++(*p));
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if(!ISPRINT(c))
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return SETCHARSET_FAIL;
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}
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if(c == ']') {
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return SETCHARSET_OK;
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}
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else if(c == '\\') {
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c = *(++(*p));
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if(ISPRINT(c)) {
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charset[c] = 1;
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state = CURLFNM_SCHS_DEFAULT;
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(*p)++;
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}
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else
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return SETCHARSET_FAIL;
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}
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if(c >= rangestart) {
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if((ISLOWER(c) && ISLOWER(rangestart)) ||
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(ISDIGIT(c) && ISDIGIT(rangestart)) ||
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(ISUPPER(c) && ISUPPER(rangestart))) {
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charset[lastchar] = 0;
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rangestart++;
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while(rangestart++ <= c)
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charset[rangestart-1] = 1;
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(*p)++;
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state = CURLFNM_SCHS_DEFAULT;
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}
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else
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return SETCHARSET_FAIL;
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}
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break;
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case CURLFNM_SCHS_RIGHTBR:
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if(c == '[') {
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state = CURLFNM_SCHS_RIGHTBRLEFTBR;
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charset[c] = 1;
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(*p)++;
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}
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else if(c == ']') {
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return SETCHARSET_OK;
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}
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else if(c == '\0') {
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return SETCHARSET_FAIL;
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}
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else if(ISPRINT(c)) {
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charset[c] = 1;
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(*p)++;
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state = CURLFNM_SCHS_DEFAULT;
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}
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else
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/* used 'goto fail' instead of 'return SETCHARSET_FAIL' to avoid a
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* nonsense warning 'statement not reached' at end of the fnc when
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* compiling on Solaris */
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goto fail;
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break;
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case CURLFNM_SCHS_RIGHTBRLEFTBR:
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if(c == ']') {
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return SETCHARSET_OK;
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}
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else {
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state = CURLFNM_SCHS_DEFAULT;
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charset[c] = 1;
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(*p)++;
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}
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break;
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}
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}
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fail:
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return SETCHARSET_FAIL;
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}
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static int loop(const unsigned char *pattern, const unsigned char *string)
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{
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loop_state state = CURLFNM_LOOP_DEFAULT;
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unsigned char *p = (unsigned char *)pattern;
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unsigned char *s = (unsigned char *)string;
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unsigned char charset[CURLFNM_CHSET_SIZE] = { 0 };
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int rc = 0;
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for(;;) {
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switch(state) {
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case CURLFNM_LOOP_DEFAULT:
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if(*p == '*') {
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while(*(p+1) == '*') /* eliminate multiple stars */
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p++;
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if(*s == '\0' && *(p+1) == '\0')
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return CURL_FNMATCH_MATCH;
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rc = loop(p + 1, s); /* *.txt matches .txt <=> .txt matches .txt */
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if(rc == CURL_FNMATCH_MATCH)
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return CURL_FNMATCH_MATCH;
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if(*s) /* let the star eat up one character */
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s++;
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else
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return CURL_FNMATCH_NOMATCH;
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}
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else if(*p == '?') {
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if(ISPRINT(*s)) {
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s++;
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p++;
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}
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else if(*s == '\0')
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return CURL_FNMATCH_NOMATCH;
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else
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return CURL_FNMATCH_FAIL; /* cannot deal with other character */
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}
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else if(*p == '\0') {
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if(*s == '\0')
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return CURL_FNMATCH_MATCH;
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else
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return CURL_FNMATCH_NOMATCH;
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}
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else if(*p == '\\') {
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state = CURLFNM_LOOP_BACKSLASH;
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p++;
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}
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else if(*p == '[') {
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unsigned char *pp = p+1; /* cannot handle with pointer to register */
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if(setcharset(&pp, charset)) {
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int found = FALSE;
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if(charset[(unsigned int)*s])
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found = TRUE;
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else if(charset[CURLFNM_ALNUM])
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found = ISALNUM(*s);
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else if(charset[CURLFNM_ALPHA])
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found = ISALPHA(*s);
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else if(charset[CURLFNM_DIGIT])
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found = ISDIGIT(*s);
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else if(charset[CURLFNM_XDIGIT])
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found = ISXDIGIT(*s);
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else if(charset[CURLFNM_PRINT])
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found = ISPRINT(*s);
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else if(charset[CURLFNM_SPACE])
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found = ISSPACE(*s);
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else if(charset[CURLFNM_UPPER])
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found = ISUPPER(*s);
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else if(charset[CURLFNM_LOWER])
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found = ISLOWER(*s);
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else if(charset[CURLFNM_BLANK])
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found = ISBLANK(*s);
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else if(charset[CURLFNM_GRAPH])
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found = ISGRAPH(*s);
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if(charset[CURLFNM_NEGATE])
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found = !found;
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if(found) {
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p = pp+1;
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s++;
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memset(charset, 0, CURLFNM_CHSET_SIZE);
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}
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else
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return CURL_FNMATCH_NOMATCH;
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}
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else
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return CURL_FNMATCH_FAIL;
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}
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else {
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if(*p++ != *s++)
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return CURL_FNMATCH_NOMATCH;
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}
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break;
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case CURLFNM_LOOP_BACKSLASH:
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if(ISPRINT(*p)) {
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if(*p++ == *s++)
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state = CURLFNM_LOOP_DEFAULT;
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else
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return CURL_FNMATCH_NOMATCH;
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}
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else
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return CURL_FNMATCH_FAIL;
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break;
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}
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}
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}
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/*
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* @unittest: 1307
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*/
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int Curl_fnmatch(void *ptr, const char *pattern, const char *string)
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{
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(void)ptr; /* the argument is specified by the curl_fnmatch_callback
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prototype, but not used by Curl_fnmatch() */
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if(!pattern || !string) {
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return CURL_FNMATCH_FAIL;
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}
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return loop((unsigned char *)pattern, (unsigned char *)string);
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}
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