359 lines
11 KiB
C
359 lines
11 KiB
C
/*
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* Shell script mode for QEmacs.
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*
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* Copyright (c) 2000-2017 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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/*---------------- Shell script colors ----------------*/
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enum {
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SHELL_SCRIPT_STYLE_TEXT = QE_STYLE_DEFAULT,
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SHELL_SCRIPT_STYLE_COMMENT = QE_STYLE_COMMENT,
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SHELL_SCRIPT_STYLE_PREPROCESS = QE_STYLE_PREPROCESS,
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SHELL_SCRIPT_STYLE_COMMAND = QE_STYLE_FUNCTION,
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SHELL_SCRIPT_STYLE_VARIABLE = QE_STYLE_TYPE,
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SHELL_SCRIPT_STYLE_STRING = QE_STYLE_STRING,
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SHELL_SCRIPT_STYLE_OP = QE_STYLE_KEYWORD,
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SHELL_SCRIPT_STYLE_KEYWORD = QE_STYLE_KEYWORD,
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};
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static const char shell_script_keywords[] = {
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/* reserved words */
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"if|then|elif|else|fi|case|esac|for|while|until|do|done|shift|break|"
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"function|return|export|alias|in|select|time|"
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/* internal commands */
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//"cd|echo|umask|"
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};
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static int shell_script_get_var(char *buf, int buf_size,
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unsigned int *str, int j, int n)
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{
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int i = 0, c;
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while (j < n && qe_isalnum_(c = str[j])) {
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if (i < buf_size - 1) {
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buf[i++] = c;
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}
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j++;
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}
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if (i < buf_size) {
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buf[i] = '\0';
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}
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return j;
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}
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static int shell_script_has_sep(unsigned int *str, int i, int n) {
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return i >= n || qe_findchar(" \t<>|&;()", str[i]);
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}
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static int shell_script_string(unsigned int *str, int i, int n,
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int sep, int escape, int dollar)
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{
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while (i < n) {
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int c = str[i++];
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if (c == '\\' && escape && i < n) {
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i++;
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} else
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if (c == '$' && dollar && i < n) {
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/* XXX: should highlight variable substitutions */
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i++;
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} else
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if (c == sep) {
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break;
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}
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}
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return i;
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}
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static void shell_script_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, j, c, start, style, bits = 0;
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/* special case sh-bang line */
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if (n >= 2 && str[0] == '#' && str[1] == '!') {
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SET_COLOR(str, 0, n, SHELL_SCRIPT_STYLE_PREPROCESS);
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return;
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}
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start_cmd:
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style = SHELL_SCRIPT_STYLE_COMMAND;
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while (i < n && qe_isblank(str[i])) {
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i++;
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}
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while (i < n) {
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start = i;
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switch (c = str[i++]) {
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case '#':
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style = SHELL_SCRIPT_STYLE_COMMENT;
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i = n;
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break;
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case '`':
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/* XXX: should be a state */
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SET_COLOR1(str, start, SHELL_SCRIPT_STYLE_OP);
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goto start_cmd;
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case '\'':
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i = shell_script_string(str, i, n, c, 0, 0);
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SET_COLOR(str, start, i, SHELL_SCRIPT_STYLE_STRING);
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/* XXX: should support multi-line strings? */
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continue;
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case '"':
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i = shell_script_string(str, i, n, c, 1, 1);
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SET_COLOR(str, start, i, SHELL_SCRIPT_STYLE_STRING);
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/* XXX: should support multi-line strings? */
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continue;
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case '\\':
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if (i >= n) {
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/* Should keep state for next line */
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SET_COLOR1(str, start, SHELL_SCRIPT_STYLE_OP);
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continue;
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}
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/* Do not interpret the next character */
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i++;
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break;
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case '$':
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if (i == n || qe_findchar(" \t\"", str[i]))
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break;
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SET_COLOR1(str, start++, SHELL_SCRIPT_STYLE_OP);
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switch (c = str[i++]) {
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case '\'':
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i = shell_script_string(str, i, n, c, 1, 0);
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SET_COLOR(str, start, i, SHELL_SCRIPT_STYLE_STRING);
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continue;
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case '(': /* expand command output */
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bits = (bits << 2) | 1;
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SET_COLOR1(str, start, SHELL_SCRIPT_STYLE_OP);
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goto start_cmd;
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case '[': /* expression */
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SET_COLOR1(str, start, SHELL_SCRIPT_STYLE_OP);
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for (j = i; i < n; i++) {
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if (str[i] == ']')
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break;
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}
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SET_COLOR(str, j, i, SHELL_SCRIPT_STYLE_TEXT);
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if (i < n) {
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i++;
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SET_COLOR(str, i - 1, i, SHELL_SCRIPT_STYLE_OP);
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}
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continue;
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case '{': /* variable substitution with options */
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SET_COLOR1(str, start, SHELL_SCRIPT_STYLE_OP);
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/* XXX: should parse variable name or single char */
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/* XXX: should support % syntax with regex */
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for (j = i; i < n; i++) {
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if (str[i] == '}')
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break;
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}
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SET_COLOR(str, j, i, SHELL_SCRIPT_STYLE_VARIABLE);
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if (i < n) {
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i++;
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SET_COLOR(str, i - 1, i, SHELL_SCRIPT_STYLE_OP);
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}
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continue;
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case '$':
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case '?':
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case '#':
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default:
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if (qe_isalpha_(c)) {
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i = shell_script_get_var(NULL, 0, str, i, n);
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SET_COLOR(str, start, i, SHELL_SCRIPT_STYLE_VARIABLE);
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} else {
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SET_COLOR1(str, start, SHELL_SCRIPT_STYLE_OP);
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}
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continue;
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}
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continue;
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case ' ':
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case '\t':
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style = SHELL_SCRIPT_STYLE_TEXT;
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break;
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case '{': /* compound command */
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case '}':
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/* XXX: should support numeric enumerations */
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if (i == n || qe_isblank(str[i])) {
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SET_COLOR(str, start, i, SHELL_SCRIPT_STYLE_OP);
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goto start_cmd;
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}
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style = SHELL_SCRIPT_STYLE_TEXT;
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break;
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case '>':
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case '<':
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// XXX: Should support other punctuation syntaxes
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if (str[i] == (unsigned int)c) { /* handle >> and << */
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i++;
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}
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SET_COLOR(str, start, i, SHELL_SCRIPT_STYLE_OP);
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// XXX: Should support << syntax
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style = SHELL_SCRIPT_STYLE_TEXT;
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continue;
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case '|':
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case '&':
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if (str[i] == (unsigned int)c) { /* handle || and && */
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i++;
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}
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SET_COLOR(str, start, i, SHELL_SCRIPT_STYLE_OP);
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goto start_cmd;
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case ';':
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SET_COLOR1(str, start, SHELL_SCRIPT_STYLE_OP);
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goto start_cmd;
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case '(':
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bits = (bits << 2) | 2;
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SET_COLOR1(str, start, SHELL_SCRIPT_STYLE_OP);
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goto start_cmd;
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case ')':
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bits = (bits >> 2);
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SET_COLOR1(str, start, SHELL_SCRIPT_STYLE_OP);
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goto start_cmd;
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case '[':
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if (style == SHELL_SCRIPT_STYLE_COMMAND) {
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bits = (bits << 2) | 3;
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SET_COLOR1(str, start, SHELL_SCRIPT_STYLE_OP);
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style = SHELL_SCRIPT_STYLE_TEXT;
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continue;
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}
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break;
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case ']':
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if ((bits & 3) == 3) {
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bits = (bits >> 2);
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SET_COLOR1(str, start, SHELL_SCRIPT_STYLE_OP);
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style = SHELL_SCRIPT_STYLE_TEXT;
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continue;
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}
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break;
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default:
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if (style == SHELL_SCRIPT_STYLE_COMMAND && qe_isalpha_(c)) {
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char kbuf[64];
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i = shell_script_get_var(kbuf, sizeof kbuf, str, i - 1, n);
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if (shell_script_has_sep(str, i, n) && strfind(syn->keywords, kbuf)) {
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SET_COLOR(str, start, i, SHELL_SCRIPT_STYLE_KEYWORD);
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if (!strfind("for|case|export|in", kbuf))
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goto start_cmd;
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else
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continue;
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}
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if (str[i] == '=') {
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SET_COLOR(str, start, i, SHELL_SCRIPT_STYLE_VARIABLE);
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SET_COLOR1(str, i, SHELL_SCRIPT_STYLE_OP);
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i++;
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style = SHELL_SCRIPT_STYLE_TEXT;
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continue;
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}
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}
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break;
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}
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SET_COLOR(str, start, i, style);
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}
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}
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static int shell_script_mode_probe(ModeDef *mode, ModeProbeData *p)
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{
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/* Match on file extension, shbang line and .bashrc .bash_history... */
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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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|| (*p->filename == '.'
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&& stristart(p->filename + 1, mode->extensions, NULL))) {
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return 82;
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}
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if (stristart(p->filename, ".profile", NULL)) {
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/* XXX: Should check the user login shell */
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return 80;
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}
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if (p->buf[0] == '#') {
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if (p->buf[1] == '!')
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return 60;
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if (p->buf[1] == ' ')
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return 25;
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}
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return 1;
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}
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/* XXX: should have shell specific variations */
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static ModeDef sh_mode = {
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.name = "Shell",
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.alt_name = "sh",
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.extensions = "sh",
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.shell_handlers = "sh",
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.mode_probe = shell_script_mode_probe,
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.colorize_func = shell_script_colorize_line,
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.keywords = shell_script_keywords,
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};
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static ModeDef bash_mode = {
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.name = "bash",
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.extensions = "bash",
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.shell_handlers = "bash",
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.mode_probe = shell_script_mode_probe,
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.colorize_func = shell_script_colorize_line,
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.keywords = shell_script_keywords,
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};
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static ModeDef csh_mode = {
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.name = "csh",
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.extensions = "csh",
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.shell_handlers = "csh",
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.mode_probe = shell_script_mode_probe,
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.colorize_func = shell_script_colorize_line,
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.keywords = shell_script_keywords,
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};
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static ModeDef ksh_mode = {
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.name = "ksh",
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.extensions = "ksh",
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.shell_handlers = "ksh",
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.mode_probe = shell_script_mode_probe,
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.colorize_func = shell_script_colorize_line,
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.keywords = shell_script_keywords,
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};
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static ModeDef zsh_mode = {
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.name = "zsh",
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.extensions = "zsh",
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.shell_handlers = "zsh",
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.mode_probe = shell_script_mode_probe,
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.colorize_func = shell_script_colorize_line,
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.keywords = shell_script_keywords,
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};
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static ModeDef tcsh_mode = {
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.name = "tcsh",
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.extensions = "tcsh",
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.shell_handlers = "tcsh",
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.mode_probe = shell_script_mode_probe,
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.colorize_func = shell_script_colorize_line,
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.keywords = shell_script_keywords,
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};
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static int shell_script_init(void)
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{
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qe_register_mode(&sh_mode, MODEF_SYNTAX);
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qe_register_mode(&bash_mode, MODEF_SYNTAX);
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qe_register_mode(&csh_mode, MODEF_SYNTAX);
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qe_register_mode(&ksh_mode, MODEF_SYNTAX);
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qe_register_mode(&zsh_mode, MODEF_SYNTAX);
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qe_register_mode(&tcsh_mode, MODEF_SYNTAX);
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return 0;
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}
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qe_module_init(shell_script_init);
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