466 lines
11 KiB
C
466 lines
11 KiB
C
/* $Id$ */
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/**************************************************************************
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* rcfile.c *
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* *
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* Copyright (C) 1999-2002 Chris Allegretta *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2, or (at your option) *
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* any later version. *
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* *
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* This program 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 *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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* *
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**************************************************************************/
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "config.h"
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#include "proto.h"
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#include "nano.h"
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#ifdef ENABLE_NANORC
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#ifndef NANO_SMALL
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#include <libintl.h>
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#define _(string) gettext(string)
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#else
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#define _(string) (string)
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#endif
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#ifndef DISABLE_WRAPJUSTIFY
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#define NUM_RCOPTS 19
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#else
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#define NUM_RCOPTS 18
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#endif
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/* Static stuff for the nanorc file */
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rcoption rcopts[NUM_RCOPTS] =
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{
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{"regexp", USE_REGEXP},
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{"const", CONSTUPDATE},
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{"autoindent", AUTOINDENT},
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{"cut", CUT_TO_END},
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{"nofollow", FOLLOW_SYMLINKS},
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{"mouse", USE_MOUSE},
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{"operatingdir", 0},
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{"pico", PICO_MODE},
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{"tabsize", 0},
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#ifndef DISABLE_WRAPJUSTIFY
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{"fill", 0},
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#endif
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{"speller", 0},
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{"tempfile", TEMP_OPT},
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{"view", VIEW_MODE},
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{"nowrap", NO_WRAP},
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{"nohelp", NO_HELP},
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{"suspend", SUSPEND},
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{"multibuffer", MULTIBUFFER},
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{"smooth", SMOOTHSCROLL},
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{"keypad", ALT_KEYPAD}};
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static int errors = 0;
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static int lineno = 0;
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static char *nanorc;
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/* We have an error in some part of the rcfile; put it on stderr and
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make the user hit return to continue starting up nano */
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void rcfile_error(char *msg, ...)
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{
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va_list ap;
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fprintf(stderr, "\n");
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fprintf(stderr, _("Error in %s on line %d: "), nanorc, lineno);
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va_start(ap, msg);
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vfprintf(stderr, msg, ap);
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va_end(ap);
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fprintf(stderr, _("\nPress return to continue starting nano\n"));
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while (getchar() != '\n')
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;
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}
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/* Just print the error (one of many, perhaps) but don't abort, yet */
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void rcfile_msg(char *msg, ...)
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{
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va_list ap;
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if (!errors) {
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errors = 1;
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fprintf(stderr, "\n");
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}
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va_start(ap, msg);
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vfprintf(stderr, msg, ap);
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va_end(ap);
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fprintf(stderr, "\n");
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}
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/* Parse the next word from the string. Returns NULL if we hit EOL */
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char *parse_next_word(char *ptr)
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{
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char *prev = " ";
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while ((*ptr != ' ' || *prev == '\\')
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&& *ptr != '\t' && *ptr != '\n' && *ptr != '\0') {
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ptr++;
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prev = ptr;
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}
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if (*ptr == '\0')
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return NULL;
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/* Null terminate and advance ptr */
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*ptr++ = 0;
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while ((*ptr == ' ' || *ptr == '\t') && *ptr != '\0')
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ptr++;
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return ptr;
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}
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int colortoint(char *colorname, int *bright)
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{
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int mcolor = 0;
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if (colorname == NULL)
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return -1;
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if (strcasestr(colorname, "bright")) {
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*bright = 1;
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colorname += 6;
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}
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if (!strcasecmp(colorname, "green"))
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mcolor += COLOR_GREEN;
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else if (!strcasecmp(colorname, "red"))
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mcolor += COLOR_RED;
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else if (!strcasecmp(colorname, "blue"))
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mcolor += COLOR_BLUE;
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else if (!strcasecmp(colorname, "white"))
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mcolor += COLOR_WHITE;
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else if (!strcasecmp(colorname, "yellow"))
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mcolor += COLOR_YELLOW;
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else if (!strcasecmp(colorname, "cyan"))
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mcolor += COLOR_CYAN;
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else if (!strcasecmp(colorname, "magenta"))
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mcolor += COLOR_MAGENTA;
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else if (!strcasecmp(colorname, "black"))
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mcolor += COLOR_BLACK;
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else {
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rcfile_error(_("color %s not understood.\n"
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"Valid colors are \"green\", \"red\", \"blue\", \n"
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"\"white\", \"yellow\", \"cyan\", \"magenta\" and \n"
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"\"black\", with the optional prefix \"bright\".\n"));
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exit(1);
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}
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return mcolor;
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}
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#ifdef ENABLE_COLOR
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/* Parse the color stuff into the colorstrings array */
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void parse_colors(FILE *rcstream, char *buf, char *ptr)
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{
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int i = 0, fg, bg, bright = 0, loopdone = 0;
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int expectend = 0; /* Do we expect an end= line? */
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char prev = '\\';
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char *tmp = NULL, *beginning, *fgstr, *bgstr;
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colortype *tmpcolor = NULL;
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fgstr = ptr;
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ptr = parse_next_word(ptr);
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if (ptr == NULL) {
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rcfile_error(_("Missing color name"));
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exit(1);
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}
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if (strstr(fgstr, ",")) {
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strtok(fgstr, ",");
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bgstr = strtok(NULL, ",");
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} else
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bgstr = NULL;
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fg = colortoint(fgstr, &bright);
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bg = colortoint(bgstr, &bright);
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/* Now the fun part, start adding regexps to individual strings
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in the colorstrings array, woo! */
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if (!strncasecmp(ptr, "start=", 6)) {
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ptr += 6;
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expectend = 1;
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}
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i = 0;
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beginning = ptr;
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while (*ptr != '\0' && !loopdone) {
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switch (*ptr) {
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case '\n':
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*ptr = ' ';
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case ' ':
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if (prev != '\\') {
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/* This is the end of the regex, uh I guess.
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Add it to the colorstrings array for this color */
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if (i == 0) {
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rcfile_error(_("regex length must be > 0"));
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continue;
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}
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tmp = NULL;
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tmp = charalloc(i + 1);
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strncpy(tmp, beginning, i);
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tmp[i] = '\0';
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/* Get rid of the leading space */
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ptr = parse_next_word(ptr);
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if (ptr == NULL)
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return;
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if (colorstrings == NULL) {
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colorstrings = nmalloc(sizeof(colortype));
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colorstrings->fg = fg;
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colorstrings->bg = bg;
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colorstrings->bright = bright;
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colorstrings->start = tmp;
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colorstrings->next = NULL;
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tmpcolor = colorstrings;
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#ifdef DEBUG
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fprintf(stderr, "Starting a new colorstring for fg %d bg %d\n", fg, bg);
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fprintf(stderr, "string val=%s\n", tmp);
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#endif
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} else {
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for (tmpcolor = colorstrings; tmpcolor->next != NULL;
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tmpcolor = tmpcolor->next)
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;
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#ifdef DEBUG
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fprintf(stderr, "Adding new entry for fg %d bg %d\n", fg, bg);
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fprintf(stderr, "string val=%s\n", tmp);
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#endif
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tmpcolor->next = nmalloc(sizeof(colortype));
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tmpcolor->next->fg = fg;
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tmpcolor->next->bg = bg;
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tmpcolor->next->bright = bright;
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tmpcolor->next->start = tmp;
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tmpcolor->next->next = NULL;
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tmpcolor = tmpcolor->next;
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}
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i = 0;
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beginning = ptr;
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if (expectend)
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loopdone = 1;
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break;
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}
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/* Else drop through to the default case */
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default:
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i++;
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prev = *ptr;
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ptr++;
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break;
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}
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}
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if (expectend) {
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if (ptr == NULL || strncasecmp(ptr, "end=", 4)) {
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rcfile_error(
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_("\n\t\"start=\" requires a corresponding \"end=\""));
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return;
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}
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ptr += 4;
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beginning = ptr;
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ptr = parse_next_word(ptr);
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#ifdef DEBUG
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fprintf(stderr, "For end part, beginning = \"%s\"\n", beginning);
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#endif
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tmp = NULL;
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tmp = mallocstrcpy(tmp, beginning);
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tmpcolor->end = tmp;
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}
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}
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#endif /* ENABLE_COLOR */
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/* Parse the RC file, once it has been opened successfully */
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void parse_rcfile(FILE *rcstream)
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{
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char *buf, *ptr, *keyword, *option;
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int set = 0, i;
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buf = charalloc(1024);
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while (fgets(buf, 1023, rcstream) > 0) {
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lineno++;
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ptr = buf;
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while ((*ptr == ' ' || *ptr == '\t') &&
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(*ptr != '\n' && *ptr != '\0'))
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ptr++;
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if (*ptr == '\n' || *ptr == '\0')
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continue;
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if (*ptr == '#') {
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#ifdef DEBUG
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fprintf(stderr, _("parse_rcfile: Read a comment\n"));
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#endif
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continue; /* Skip past commented lines */
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}
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/* Else skip to the next space */
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keyword = ptr;
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ptr = parse_next_word(ptr);
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if (!ptr)
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continue;
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/* Else try to parse the keyword */
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if (!strcasecmp(keyword, "set"))
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set = 1;
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else if (!strcasecmp(keyword, "unset"))
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set = -1;
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#ifdef ENABLE_COLOR
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else if (!strcasecmp(keyword, "color"))
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parse_colors(rcstream, buf, ptr);
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#endif /* ENABLE_COLOR */
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else {
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rcfile_msg(_("command %s not understood"), keyword);
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continue;
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}
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option = ptr;
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ptr = parse_next_word(ptr);
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/* We don't care if ptr == NULL, as it should if using proper syntax */
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if (set != 0) {
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for (i = 0; i <= NUM_RCOPTS - 1; i++) {
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if (!strcasecmp(option, rcopts[i].name)) {
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#ifdef DEBUG
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fprintf(stderr, _("parse_rcfile: Parsing option %s\n"),
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rcopts[i].name);
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#endif
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if (set == 1 || rcopts[i].flag == FOLLOW_SYMLINKS) {
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if (
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!strcasecmp(rcopts[i].name, "operatingdir") ||
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!strcasecmp(rcopts[i].name, "tabsize") ||
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#ifndef DISABLE_WRAPJUSTIFY
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!strcasecmp(rcopts[i].name, "fill") ||
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#endif
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#ifndef DISABLE_SPELLER
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!strcasecmp(rcopts[i].name, "speller")
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#else
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0
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#endif
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) {
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if (*ptr == '\n' || *ptr == '\0') {
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rcfile_error(_("option %s requires an argument"),
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rcopts[i].name);
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continue;
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}
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option = ptr;
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ptr = parse_next_word(ptr);
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if (!strcasecmp(rcopts[i].name, "fill")) {
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#ifndef DISABLE_WRAPJUSTIFY
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if ((i = atoi(option)) < MIN_FILL_LENGTH) {
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rcfile_error(
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_("requested fill size %d too small"), i);
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}
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else
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fill = i;
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#endif
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} else if (!strcasecmp(rcopts[i].name, "tabsize")) {
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if ((i = atoi(option)) <= 0) {
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rcfile_error(
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_("requested tab size %d too small"), i);
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} else {
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tabsize = i;
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}
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} else {
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#ifndef DISABLE_SPELLER
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alt_speller = charalloc(strlen(option) + 1);
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strcpy(alt_speller, option);
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#endif
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}
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} else
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SET(rcopts[i].flag);
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#ifdef DEBUG
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fprintf(stderr, _("set flag %d!\n"), rcopts[i].flag);
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#endif
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} else {
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UNSET(rcopts[i].flag);
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#ifdef DEBUG
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fprintf(stderr, _("unset flag %d!\n"), rcopts[i].flag);
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#endif
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}
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}
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}
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}
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}
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if (errors)
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rcfile_error(_("Errors found in .nanorc file"));
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return;
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}
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/* The main rc file function, tries to open the rc file */
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void do_rcfile(void)
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{
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char *unable = _("Unable to open ~/.nanorc file, %s");
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struct stat fileinfo;
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FILE *rcstream;
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if (getenv("HOME") == NULL)
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return;
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nanorc = charalloc(strlen(getenv("HOME")) + 10);
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sprintf(nanorc, "%s/.nanorc", getenv("HOME"));
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if (stat(nanorc, &fileinfo) == -1) {
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/* Abort if the file doesn't exist and there's some other kind
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of error stat()ing it */
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if (errno != ENOENT)
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rcfile_error(unable, errno);
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return;
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}
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if ((rcstream = fopen(nanorc, "r")) == NULL) {
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rcfile_error(unable, strerror(errno));
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return;
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}
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parse_rcfile(rcstream);
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fclose(rcstream);
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}
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#endif /* ENABLE_NANORC */
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