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Location: cpp/openttd-patchpack/source/src/stringfilter.cpp
r21584:561d516cfa45
3.5 KiB
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(svn r26708) -Codechange: replace C preprocessor with all kinds of options to prevent adding certain things to the result and the sed script to remove everything that shouldn't be in the resulting nfo file but came out of the C preprocessor by a small-ish awk program. This means no more breaking if a C preprocessor decides to add more data to the processed file (like GCC's inclusion of stdc-predef.h when not passing -nostdinc). It furthermore more than halfs the time needed for the assemble step of the extra GRF compilation
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | /* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file stringfilter.cpp Searching and filtering using a stringterm. */
#include "stdafx.h"
#include "string_func.h"
#include "strings_func.h"
#include "stringfilter_type.h"
#include "gfx_func.h"
#include "safeguards.h"
static const WChar STATE_WHITESPACE = ' ';
static const WChar STATE_WORD = 'w';
static const WChar STATE_QUOTE1 = '\'';
static const WChar STATE_QUOTE2 = '"';
/**
* Set the term to filter on.
* @param str Filter term
*/
void StringFilter::SetFilterTerm(const char *str)
{
this->word_index.Reset();
this->word_matches = 0;
free(this->filter_buffer);
assert(str != NULL);
char *dest = MallocT<char>(strlen(str) + 1);
this->filter_buffer = dest;
WChar state = STATE_WHITESPACE;
const char *pos = str;
WordState *word = NULL;
size_t len;
for (;; pos += len) {
WChar c;
len = Utf8Decode(&c, pos);
if (c == 0 || (state == STATE_WORD && IsWhitespace(c))) {
/* Finish word */
if (word != NULL) {
*(dest++) = '\0';
word = NULL;
}
state = STATE_WHITESPACE;
if (c != 0) continue; else break;
}
if (state == STATE_WHITESPACE) {
/* Skip whitespace */
if (IsWhitespace(c)) continue;
state = STATE_WORD;
}
if (c == STATE_QUOTE1 || c == STATE_QUOTE2) {
if (state == c) {
/* Stop quoting */
state = STATE_WORD;
continue;
} else if (state == STATE_WORD) {
/* Start quoting */
state = c;
continue;
}
}
/* Add to word */
if (word == NULL) {
word = this->word_index.Append();
word->start = dest;
word->match = false;
}
memcpy(dest, pos, len);
dest += len;
}
}
/**
* Reset the matching state to process a new item.
*/
void StringFilter::ResetState()
{
this->word_matches = 0;
const WordState *end = this->word_index.End();
for (WordState *it = this->word_index.Begin(); it != end; ++it) {
it->match = false;
}
}
/**
* Pass another text line from the current item to the filter.
*
* You can call this multiple times for a single item, if the filter shall apply to multiple things.
* Before processing the next item you have to call ResetState().
*
* @param str Another line from the item.
*/
void StringFilter::AddLine(const char *str)
{
if (str == NULL) return;
bool match_case = this->case_sensitive != NULL && *this->case_sensitive;
const WordState *end = this->word_index.End();
for (WordState *it = this->word_index.Begin(); it != end; ++it) {
if (!it->match) {
if ((match_case ? strstr(str, it->start) : strcasestr(str, it->start)) != NULL) {
it->match = true;
this->word_matches++;
}
}
}
}
/**
* Pass another text line from the current item to the filter.
*
* You can call this multiple times for a single item, if the filter shall apply to multiple things.
* Before processing the next item you have to call ResetState().
*
* @param str Another line from the item.
*/
void StringFilter::AddLine(StringID str)
{
char buffer[DRAW_STRING_BUFFER];
GetString(buffer, str, lastof(buffer));
AddLine(buffer);
}
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