freebsd-dev/contrib/global/lib/conf.c
Hidetoshi Shimokawa 3ba3e2cc4b Import Global v3_4_2 sources.
Ok'd by: peter
Discussed with: msmith
1999-01-18 06:59:18 +00:00

309 lines
7.0 KiB
C

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