300 lines
9.8 KiB
C
300 lines
9.8 KiB
C
/*
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* Elixir language mode for QEmacs.
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*
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* Copyright (c) 2000-2022 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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/*---------------- Elixir coloring ----------------*/
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static char const elixir_keywords[] = {
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"|do|end|cond|case|if|else|after|for|unless|when|quote|in"
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"|try|catch|rescue|raise"
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"|def|defp|defmodule|defcallback|defmacro|defsequence"
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"|defmacrop|defdelegate|defstruct|defexception|defimpl"
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"|require|alias|import|use|fn"
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"|setup|test|assert|refute|using"
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"|true|false|nil|and|or|not|_"
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"|"
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};
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static char const elixir_delim1[] = "\'\"/|([{<";
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static char const elixir_delim2[] = "\'\"/|)]}>";
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enum {
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IN_ELIXIR_DELIM = 0x0F,
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IN_ELIXIR_STRING = 0x10,
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IN_ELIXIR_REGEX = 0x20,
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IN_ELIXIR_TRIPLE = 0x40,
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};
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enum {
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ELIXIR_STYLE_TEXT = QE_STYLE_DEFAULT,
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ELIXIR_STYLE_COMMENT = QE_STYLE_COMMENT,
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ELIXIR_STYLE_CHARCONST = QE_STYLE_STRING,
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ELIXIR_STYLE_STRING = QE_STYLE_STRING,
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ELIXIR_STYLE_HEREDOC = QE_STYLE_STRING,
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ELIXIR_STYLE_REGEX = QE_STYLE_STRING,
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ELIXIR_STYLE_NUMBER = QE_STYLE_NUMBER,
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ELIXIR_STYLE_KEYWORD = QE_STYLE_KEYWORD,
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ELIXIR_STYLE_ATOM = QE_STYLE_TYPE,
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ELIXIR_STYLE_TAG = QE_STYLE_VARIABLE,
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ELIXIR_STYLE_FUNCTION = QE_STYLE_FUNCTION,
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ELIXIR_STYLE_PREPROCESS = QE_STYLE_PREPROCESS,
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};
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static void elixir_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, klen, nc, has_under;
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int state = cp->colorize_state;
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char kbuf[64];
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if (state & IN_ELIXIR_STRING)
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goto parse_string;
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if (state & IN_ELIXIR_REGEX)
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goto parse_regex;
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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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i = n;
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style = ELIXIR_STYLE_COMMENT;
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break;
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case '?':
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i = erlang_match_char(str, i);
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style = ELIXIR_STYLE_CHARCONST;
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break;
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case '~':
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if (qe_tolower(str[i]) == 'r') {
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nc = qe_indexof(elixir_delim1, str[i + 1]);
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if (nc >= 0) {
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i += 2;
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state = IN_ELIXIR_REGEX | nc;
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if (nc < 2) { /* '\'' or '\"' */
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if (str[i + 0] == (unsigned int)c
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&& str[i + 1] == (unsigned int)c) {
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state |= IN_ELIXIR_TRIPLE;
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i += 2;
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}
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}
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parse_regex:
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sep = elixir_delim2[state & 15];
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/* parse regular expression */
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while (i < n) {
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if ((c = str[i++]) == '\\') {
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if (i < n)
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i += 1;
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continue;
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}
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if (c == sep) {
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if (!(state & IN_ELIXIR_TRIPLE)) {
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state = 0;
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break;
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}
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if (str[i] == (unsigned int)sep
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&& 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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}
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while (qe_islower(str[i])) {
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/* regex suffix */
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i++;
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}
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style = ELIXIR_STYLE_REGEX;
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break;
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}
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}
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continue;
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case '\'':
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case '\"':
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/* parse string constants and here documents */
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state = IN_ELIXIR_STRING | (c == '\"');
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if (str[i + 0] == (unsigned int)c
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&& str[i + 1] == (unsigned int)c) {
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/* here documents */
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state |= IN_ELIXIR_TRIPLE;
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i += 2;
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}
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parse_string:
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sep = elixir_delim2[state & 15];
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style = (state & IN_ELIXIR_TRIPLE) ?
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ELIXIR_STYLE_HEREDOC : ELIXIR_STYLE_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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continue;
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}
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/* XXX: should colorize <% %> expressions and interpolation */
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if (c == sep) {
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if (!(state & IN_ELIXIR_TRIPLE)) {
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state = 0;
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break;
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}
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if (str[i] == (unsigned int)sep
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&& 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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}
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break;
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case '@':
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case ':':
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if (qe_isalpha(str[i]))
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goto has_alpha;
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continue;
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case '<':
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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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style = ELIXIR_STYLE_PREPROCESS;
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break;
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}
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continue;
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case '%':
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if (str[i] == '>') {
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i++;
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style = ELIXIR_STYLE_PREPROCESS;
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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' && qe_tolower(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' && qe_tolower(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' && qe_tolower(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 (has_under = 0;; i++) {
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if (qe_isdigit(str[i]))
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continue;
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if (str[i] == '_' && qe_isdigit(str[i + 1])) {
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/* integers may contain embedded _ characters */
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has_under = 1;
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i++;
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continue;
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}
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break;
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}
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if (!has_under && str[i] == '.' && qe_isdigit(str[i + 1])) {
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i += 2;
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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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/* exponent notation requires a decimal point */
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if (qe_tolower(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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}
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style = ELIXIR_STYLE_NUMBER;
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break;
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}
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if (qe_isalpha_(c)) {
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has_alpha:
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klen = 0;
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kbuf[klen++] = c;
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for (; qe_isalnum_(c = str[i]); i++) {
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if (klen < countof(kbuf) - 1)
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kbuf[klen++] = c;
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}
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if (c == '!' || c == '?') {
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i++;
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if (klen < countof(kbuf) - 1)
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kbuf[klen++] = c;
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}
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kbuf[klen] = '\0';
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style = 0;
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if (kbuf[0] == '@') {
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style = ELIXIR_STYLE_PREPROCESS;
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} else
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if (kbuf[0] == ':') {
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style = ELIXIR_STYLE_ATOM;
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} else
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if (strfind(syn->keywords, kbuf)) {
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style = ELIXIR_STYLE_KEYWORD;
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} else
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if (c == ':') {
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style = ELIXIR_STYLE_TAG;
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} else
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if (check_fcall(str, i)) {
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style = ELIXIR_STYLE_FUNCTION;
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}
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break;
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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 ModeDef elixir_mode = {
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.name = "Elixir",
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.extensions = "ex|exs",
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.shell_handlers = "elixir",
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.keywords = elixir_keywords,
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.colorize_func = elixir_colorize_line,
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};
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static int elixir_init(void)
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{
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qe_register_mode(&elixir_mode, MODEF_SYNTAX);
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return 0;
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}
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qe_module_init(elixir_init);
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