379 lines
13 KiB
C
379 lines
13 KiB
C
/*
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* Coffee script language mode for QEmacs.
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*
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* Copyright (c) 2000-2020 Charlie Gordon.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "qe.h"
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/*---------------- Coffee coloring ----------------*/
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static char const coffee_keywords[] = {
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// keywords common with Javascript:
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"true|false|null|this|new|delete|typeof|in|instanceof|"
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"return|throw|break|continue|debugger|yield|if|else|"
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"switch|for|while|do|try|catch|finally|class|extends|super|"
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// CoffeeScript only keywords:
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"undefined|then|unless|until|loop|of|by|when|"
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// aliasses
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"and|or|is|isnt|not|yes|no|on|off|"
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// reserved: should be flagged as errors
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"case|default|function|var|void|with|const|let|enum|export|import|"
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"native|implements|interface|package|private|protected|public|static|"
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// proscribed in strict mode
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"arguments|eval|yield*|"
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};
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enum {
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IN_COFFEE_STRING = 0x100,
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IN_COFFEE_STRING2 = 0x200,
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IN_COFFEE_REGEX = 0x400,
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IN_COFFEE_LONG_STRING = 0x01,
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IN_COFFEE_LONG_STRING2 = 0x02,
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IN_COFFEE_LONG_REGEX = 0x04,
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IN_COFFEE_REGEX_CCLASS = 0x08,
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IN_COFFEE_JSTOKEN = 0x10,
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IN_COFFEE_LONG_COMMENT = 0x20,
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};
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enum {
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COFFEE_STYLE_TEXT = QE_STYLE_DEFAULT,
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COFFEE_STYLE_COMMENT = QE_STYLE_COMMENT,
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COFFEE_STYLE_STRING = QE_STYLE_STRING,
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COFFEE_STYLE_REGEX = QE_STYLE_STRING,
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COFFEE_STYLE_JSTOKEN = QE_STYLE_STRING,
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COFFEE_STYLE_NUMBER = QE_STYLE_NUMBER,
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COFFEE_STYLE_KEYWORD = QE_STYLE_KEYWORD,
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COFFEE_STYLE_FUNCTION = QE_STYLE_FUNCTION,
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COFFEE_STYLE_ERROR = QE_STYLE_ERROR,
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};
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static void coffee_colorize_line(QEColorizeContext *cp,
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unsigned int *str, int n, ModeDef *syn)
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{
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int i = 0, start = i, c, style = 0, sep, prev, i1;
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int state = cp->colorize_state;
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char kbuf[64];
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if (state & IN_COFFEE_STRING) {
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sep = '\'';
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goto parse_string;
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}
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if (state & IN_COFFEE_STRING2) {
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sep = '\"';
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goto parse_string;
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}
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if (state & IN_COFFEE_REGEX) {
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goto parse_regex;
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}
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if (state & IN_COFFEE_LONG_STRING) {
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sep = '\'';
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goto parse_long_string;
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}
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if (state & IN_COFFEE_LONG_STRING2) {
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sep = '\"';
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goto parse_long_string;
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}
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if (state & IN_COFFEE_LONG_REGEX) {
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goto parse_regex;
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}
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if (state & IN_COFFEE_JSTOKEN) {
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goto parse_jstoken;
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}
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if (state & IN_COFFEE_LONG_COMMENT) {
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goto parse_long_comment;
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}
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while (i < n) {
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start = i;
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c = str[i++];
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switch (c) {
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case '#':
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if (str[i] == '#' && str[i + 1] == '#') {
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/* multi-line block comments with ### */
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state = IN_COFFEE_LONG_COMMENT;
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parse_long_comment:
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while (i < n) {
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c = str[i++];
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if (c == '#' && str[i] == '#' && str[i + 1] == '#') {
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i += 2;
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state = 0;
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break;
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}
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}
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} else {
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i = n;
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}
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style = COFFEE_STYLE_COMMENT;
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break;
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case '\'':
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case '\"':
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/* parse string constant */
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i--;
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sep = str[i++];
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if (str[i] == (unsigned int)sep && str[i + 1] == (unsigned int)sep) {
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/* long string */
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state = (sep == '\"') ? IN_COFFEE_LONG_STRING2 :
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IN_COFFEE_LONG_STRING;
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i += 2;
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parse_long_string:
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while (i < n) {
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c = str[i++];
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if (c == '\\') {
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if (i < n) {
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i += 1;
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}
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} else
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if (c == sep && str[i] == (unsigned int)sep && str[i + 1] == (unsigned int)sep) {
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i += 2;
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state = 0;
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break;
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}
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}
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} else {
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state = (sep == '\"') ? IN_COFFEE_STRING2 : IN_COFFEE_STRING;
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parse_string:
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while (i < n) {
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c = str[i++];
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if (c == '\\') {
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if (i < n) {
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i += 1;
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}
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} else
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if (c == sep) {
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state = 0;
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break;
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}
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}
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if (state) {
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state = 0;
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// unterminated string literal, should flag unless
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// point is at end of line.
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style = COFFEE_STYLE_ERROR;
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break;
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}
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}
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style = COFFEE_STYLE_STRING;
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break;
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case '`':
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/* parse multi-line JS token */
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state = IN_COFFEE_JSTOKEN;
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parse_jstoken:
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while (i < n) {
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c = str[i++];
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if (c == '\\') {
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if (i < n) {
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i += 1;
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}
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} else
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if (c == '`') {
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state = 0;
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break;
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}
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}
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style = COFFEE_STYLE_JSTOKEN;
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break;
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case '.':
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if (qe_isdigit(str[i]))
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goto parse_decimal;
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if (str[i] == '.') /* .. range operator */
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i++;
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if (str[i] == '.') /* ... range operator */
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i++;
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continue;
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case '/':
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/* XXX: should use more context to tell regex from divide */
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if (str[i] == '/') {
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i++;
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if (str[i] == '/') {
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/* multiline /// regex */
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state = IN_COFFEE_LONG_REGEX;
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i++;
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goto parse_regex;
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} else {
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/* floor divide // operator */
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break;
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}
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}
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prev = ' ';
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for (i1 = start; i1 > 0; ) {
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prev = str[--i1] & CHAR_MASK;
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if (!qe_isblank(prev))
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break;
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}
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if (qe_findchar(" [({},;=<>!~^&|*/%?:", prev)
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|| qe_findchar("^\\?.[{},;<>!~&|*%:", str[i])
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|| (str[i] == '=' && str[i + 1] == '/')
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|| (str[i] == '(' && str[i + 1] == '?')
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|| (str[i1] >> STYLE_SHIFT) == COFFEE_STYLE_KEYWORD
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|| (str[i] != ' ' && (str[i] != '=' || str[i + 1] != ' ')
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&& !(qe_isalnum(prev) || qe_findchar(")]}\"\'?:", prev)))) {
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state = IN_COFFEE_REGEX;
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parse_regex:
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style = COFFEE_STYLE_REGEX;
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while (i < n) {
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c = str[i++];
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if (c == '\\') {
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if (i < n) {
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i += 1;
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}
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} else
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if (state & IN_COFFEE_REGEX_CCLASS) {
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if (c == ']') {
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state &= ~IN_COFFEE_REGEX_CCLASS;
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}
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/* ignore '/' inside char classes */
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} else {
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if (c == '[') {
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state |= IN_COFFEE_REGEX_CCLASS;
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if (str[i] == '^')
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i++;
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if (str[i] == ']')
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i++;
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} else
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if (state & IN_COFFEE_LONG_REGEX) {
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if (c == '/' && str[i] == '/' && str[i + 1] == '/') {
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i += 2;
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state = 0;
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while (qe_isalpha(str[i]))
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i++;
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break;
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} else
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if (qe_isblank(c) && str[i] == '#' && str[i+1] != '{') {
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SET_COLOR(str, start, i, style);
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start = i;
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i = n;
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style = COFFEE_STYLE_COMMENT;
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break;
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}
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} else {
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if (c == '/') {
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state = 0;
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while (qe_isalpha(str[i]))
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i++;
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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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if (state & ~IN_COFFEE_LONG_REGEX) {
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state = 0;
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// unterminated regex literal, should flag unless
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// point is at end of line.
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style = COFFEE_STYLE_ERROR;
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break;
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}
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break;
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}
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continue;
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default:
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if (qe_isdigit(c)) {
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if (c == '0' && str[i] == 'b') {
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/* binary numbers */
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for (i += 1; qe_isbindigit(str[i]); i++)
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continue;
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} else
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if (c == '0' && str[i] == 'o') {
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/* octal numbers */
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for (i += 1; qe_isoctdigit(str[i]); i++)
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continue;
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} else
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if (c == '0' && str[i] == 'x') {
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/* hexadecimal numbers */
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for (i += 1; qe_isxdigit(str[i]); i++)
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continue;
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} else {
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/* decimal numbers */
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for (; qe_isdigit(str[i]); i++)
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continue;
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if (str[i] == '.' && qe_isdigit(str[i + 1])) {
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i++;
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parse_decimal:
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/* decimal floats require a digit after the '.' */
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for (; qe_isdigit(str[i]); i++)
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continue;
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}
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if (str[i] == 'e') {
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int k = i + 1;
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if (str[k] == '+' || str[k] == '-')
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k++;
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if (qe_isdigit(str[k])) {
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for (i = k + 1; qe_isdigit(str[i]); i++)
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continue;
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}
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}
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}
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/* XXX: should detect malformed number constants */
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style = COFFEE_STYLE_NUMBER;
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break;
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}
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if (qe_isalpha_(c)) {
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i += ustr_get_identifier(kbuf, countof(kbuf), c, str, i, n);
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if (strfind(syn->keywords, kbuf)) {
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style = COFFEE_STYLE_KEYWORD;
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break;
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}
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if (check_fcall(str, i)) {
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style = COFFEE_STYLE_FUNCTION;
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break;
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}
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continue;
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}
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continue;
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}
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if (style) {
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SET_COLOR(str, start, i, style);
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style = 0;
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}
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}
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cp->colorize_state = state;
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}
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static int coffee_mode_probe(ModeDef *mode, ModeProbeData *p)
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{
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if (match_extension(p->filename, mode->extensions)
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|| match_shell_handler(cs8(p->buf), mode->shell_handlers)
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|| stristart(p->filename, "Cakefile", NULL)) {
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return 80;
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}
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return 1;
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}
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static ModeDef coffee_mode = {
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.name = "CoffeeScript",
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.alt_name = "coffee",
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.extensions = "coffee",
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.shell_handlers = "coffee",
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.mode_probe = coffee_mode_probe,
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.keywords = coffee_keywords,
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.colorize_func = coffee_colorize_line,
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};
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static int coffee_init(void)
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{
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qe_register_mode(&coffee_mode, MODEF_SYNTAX);
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return 0;
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}
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qe_module_init(coffee_init);
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