309 lines
7.0 KiB
C
309 lines
7.0 KiB
C
/*
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* Copyright (c) 1996, 1997, 1998 Shigio Yamaguchi. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Shigio Yamaguchi.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* conf.c 30-Jun-98
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*
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*/
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#include <sys/param.h>
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#include <assert.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include "conf.h"
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#include "die.h"
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#include "gparam.h"
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#include "locatestring.h"
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#include "makepath.h"
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#include "mgets.h"
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#include "strbuf.h"
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#include "strmake.h"
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#include "test.h"
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/*
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* Access library for gtags.conf (.gtagsrc).
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* File format is a subset of XXXcap (termcap, printcap) file.
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*/
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#define GTAGSCONF "/etc/global.conf"
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#define GTAGSRC ".globalrc"
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#define DEFAULTLABEL "default"
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static FILE *fp;
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static char *line;
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static int allowed_nest_level = 8;
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static int opened;
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static void trim __P((char *));
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static char *readrecord __P((const char *));
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static void includelabel __P((STRBUF *, const char *, int));
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static void
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trim(l)
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char *l;
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{
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char *f, *b;
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int colon = 0;
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for (f = b = l; *f; f++) {
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if (colon && isspace(*f))
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continue;
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colon = 0;
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if ((*b++ = *f) == ':')
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colon = 1;
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}
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*b = 0;
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}
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static char *
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readrecord(label)
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const char *label;
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{
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char *p, *q;
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rewind(fp);
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while ((p = mgets(fp, NULL, MGETS_CONT|MGETS_SKIPCOM)) != NULL) {
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trim(p);
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for (;;) {
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if ((q = strmake(p, "|:")) == NULL)
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die1("illegal configuration file format (%s).", p);
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if (!strcmp(label, q)) {
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if (!(p = locatestring(p, ":", MATCH_FIRST)))
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die("illegal configuration file format.");
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p = strdup(p);
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if (!p)
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die("short of memory.");
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return p;
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}
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p += strlen(q);
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if (*p == ':')
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break;
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else if (*p == '|')
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p++;
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else
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assert(0);
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}
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}
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return NULL;
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}
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static void
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includelabel(sb, label, level)
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STRBUF *sb;
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const char *label;
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int level;
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{
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char *savep, *p, *q;
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if (++level > allowed_nest_level)
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die("nested include= (or tc=) over flow.");
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if (!(savep = p = readrecord(label)))
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die1("label '%s' not found.", label);
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while ((q = locatestring(p, ":include=", MATCH_FIRST)) || (q = locatestring(p, ":tc=", MATCH_FIRST))) {
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char inclabel[MAXPROPLEN+1], *c = inclabel;
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strnputs(sb, p, q - p);
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q = locatestring(q, "=", MATCH_FIRST) + 1;
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while (*q && *q != ':')
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*c++ = *q++;
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*c = 0;
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includelabel(sb, inclabel, level);
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p = q;
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}
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strputs(sb, p);
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free(savep);
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}
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/*
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* configpath: get path of configuration file.
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*/
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char *
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configpath() {
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static char config[MAXPATHLEN+1];
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char *p;
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if ((p = getenv("GTAGSCONF")) != NULL) {
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if (!test("r", p))
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config[0] = 0;
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else
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strcpy(config, p);
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} else if ((p = getenv("HOME")) && test("r", makepath(p, GTAGSRC)))
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strcpy(config, makepath(p, GTAGSRC));
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else if (test("r", GTAGSCONF))
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strcpy(config, GTAGSCONF);
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else
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config[0] = 0;
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return config;
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}
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/*
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* openconf: load configuration file.
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*
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* go) line specified entry
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*/
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void
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openconf()
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{
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const char *label, *config;
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STRBUF *sb;
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assert(opened == 0);
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config = configpath();
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/*
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* if configuration file is not found, default values are set
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* for upper compatibility.
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*/
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if (*config == 0) {
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sb = stropen();
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strputs(sb, "suffixes=c,h,y,s,S,java:");
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strputs(sb, "skip=y.tab.c,y.tab.h,SCCS/,RCS/,CVS/:");
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strputs(sb, "format=standard:");
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strputs(sb, "extractmethod:");
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strputs(sb, "GTAGS=gctags %s:");
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strputs(sb, "GRTAGS=gctags -r %s:");
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strputs(sb, "GSYMS=gctags -s %s:");
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line = strdup(strvalue(sb));
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if (!line)
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die("short of memory.");
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strclose(sb);
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opened = 1;
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return;
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}
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if ((label = getenv("GTAGSLABEL")) == NULL)
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label = "default";
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if (!(fp = fopen(config, "r")))
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die1("cannot open '%s'.", config);
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sb = stropen();
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includelabel(sb, label, 0);
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line = strdup(strvalue(sb));
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strclose(sb);
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fclose(fp);
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opened = 1;
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return;
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}
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/*
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* getconfn: get property number
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*
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* i) name property name
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* o) num value (if not NULL)
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* r) 1: found, 0: not found
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*/
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int
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getconfn(name, num)
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const char *name;
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int *num;
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{
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char *p;
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char buf[MAXPROPLEN+1];
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if (!opened)
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openconf();
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sprintf(buf, ":%s#", name);
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if ((p = locatestring(line, buf, MATCH_FIRST)) != NULL) {
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p += strlen(buf);
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if (num != NULL)
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*num = atoi(p);
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return 1;
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}
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return 0;
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}
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/*
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* getconfs: get property string
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*
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* i) name property name
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* o) sb string buffer (if not NULL)
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* r) 1: found, 0: not found
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*/
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int
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getconfs(name, sb)
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const char *name;
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STRBUF *sb;
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{
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char *p;
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char buf[MAXPROPLEN+1];
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int all = 0;
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int exist = 0;
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if (!opened)
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openconf();
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if (!strcmp(name, "suffixes") || !strcmp(name, "skip") || !strcmp(name, "reserved_words"))
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all = 1;
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sprintf(buf, ":%s=", name);
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p = line;
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while ((p = locatestring(p, buf, MATCH_FIRST)) != NULL) {
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if (exist && sb)
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strputc(sb, ',');
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exist = 1;
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for (p += strlen(buf); *p && *p != ':'; p++)
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if (sb)
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strputc(sb, *p);
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if (!all)
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break;
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}
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/*
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* It may be that these code should be moved to applications.
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* But nothing cannot start without them.
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*/
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if (!exist) {
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exist = 1;
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if (!strcmp(name, "suffixes")) {
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if (sb)
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strputs(sb, "c,h,y,s,S,java");
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} else if (!strcmp(name, "skip")) {
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if (sb)
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strputs(sb, "y.tab.c,y.tab.h,SCCS/,RCS/,CVS/");
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} else
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exist = 0;
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}
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return exist;
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}
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/*
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* getconfb: get property bool value
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*
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* i) name property name
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* r) 1: TRUE, 0: FALSE
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*/
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int
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getconfb(name)
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const char *name;
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{
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char *p;
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char buf[MAXPROPLEN+1];
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if (!opened)
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openconf();
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sprintf(buf, ":%s:", name);
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if ((p = locatestring(line, buf, MATCH_FIRST)) != NULL)
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return 1;
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return 0;
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}
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void
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closeconf()
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{
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if (!opened)
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return;
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free(line);
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opened = 0;
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}
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