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#ifndef lint
static char *RCSid() { return RCSid("$Id: variable.c,v 1.44 2013/07/02 22:19:09 sfeam Exp $"); }
#endif
/* GNUPLOT - variable.c */
/*[
* Copyright 1999, 2004 Lars Hecking
*
* Permission to use, copy, and distribute this software and its
* documentation for any purpose with or without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.
*
* Permission to modify the software is granted, but not the right to
* distribute the complete modified source code. Modifications are to
* be distributed as patches to the released version. Permission to
* distribute binaries produced by compiling modified sources is granted,
* provided you
* 1. distribute the corresponding source modifications from the
* released version in the form of a patch file along with the binaries,
* 2. add special version identification to distinguish your version
* in addition to the base release version number,
* 3. provide your name and address as the primary contact for the
* support of your modified version, and
* 4. retain our contact information in regard to use of the base
* software.
* Permission to distribute the released version of the source code along
* with corresponding source modifications in the form of a patch file is
* granted with same provisions 2 through 4 for binary distributions.
*
* This software is provided "as is" without express or implied warranty
* to the extent permitted by applicable law.
]*/
/* The Death of Global Variables - part one. */
#include <string.h>
#include "variable.h"
#include "alloc.h"
#include "command.h"
#include "plot.h"
#include "util.h"
#include "term_api.h"
#define PATHSEP_TO_NUL(arg) \
do { \
char *s = arg; \
while ((s = strchr(s, PATHSEP)) != NULL) \
*s++ = NUL; \
} while (0)
#define PRINT_PATHLIST(start, limit) \
do { \
char *s = start; \
\
while (s < limit) { \
fprintf(stderr, "\"%s\" ", s); \
s += strlen(s) + 1; \
} \
fputc('\n',stderr); \
} while (0)
/*
* char *loadpath_handler (int, char *)
*
*/
char *
loadpath_handler(int action, char *path)
{
/* loadpath variable
* the path elements are '\0' separated (!)
* this way, reading out loadpath is very
* easy to implement */
static char *loadpath;
/* index pointer, end of loadpath,
* env section of loadpath, current limit, in that order */
static char *p, *last, *envptr, *limit;
#ifdef X11
char *appdir;
#endif
switch (action) {
case ACTION_CLEAR:
/* Clear loadpath, fall through to init */
FPRINTF((stderr, "Clear loadpath\n"));
free(loadpath);
loadpath = p = last = NULL;
/* HBB 20000726: 'limit' has to be initialized to NULL, too! */
limit = NULL;
case ACTION_INIT:
/* Init loadpath from environment */
FPRINTF((stderr, "Init loadpath from environment\n"));
assert(loadpath == NULL);
if (!loadpath)
{
char *envlib = getenv("GNUPLOT_LIB");
if (envlib) {
int len = strlen(envlib);
loadpath = gp_strdup(envlib);
/* point to end of loadpath */
last = loadpath + len;
/* convert all PATHSEPs to \0 */
PATHSEP_TO_NUL(loadpath);
} /* else: NULL = empty */
} /* else: already initialised; int_warn (?) */
/* point to env portion of loadpath */
envptr = loadpath;
break;
case ACTION_SET:
/* set the loadpath */
FPRINTF((stderr, "Set loadpath\n"));
if (path && *path != NUL) {
/* length of env portion */
size_t elen = last - envptr;
size_t plen = strlen(path);
if (loadpath && envptr) {
/* we are prepending a path name; because
* realloc() preserves only the contents up
* to the minimum of old and new size, we move
* the part to be preserved to the beginning
* of the string; use memmove() because strings
* may overlap */
memmove(loadpath, envptr, elen + 1);
}
loadpath = gp_realloc(loadpath, elen + 1 + plen + 1, "expand loadpath");
/* now move env part back to the end to make space for
* the new path */
memmove(loadpath + plen + 1, loadpath, elen + 1);
strcpy(loadpath, path);
/* separate new path(s) and env path(s) */
loadpath[plen] = PATHSEP;
/* adjust pointer to env part and last */
envptr = &loadpath[plen+1];
last = envptr + elen;
PATHSEP_TO_NUL(loadpath);
} /* else: NULL = empty */
break;
case ACTION_SHOW:
/* print the current, full loadpath */
FPRINTF((stderr, "Show loadpath\n"));
if (loadpath) {
fputs("\tloadpath is ", stderr);
PRINT_PATHLIST(loadpath, envptr);
if (envptr) {
/* env part */
fputs("\tloadpath from GNUPLOT_LIB is ", stderr);
PRINT_PATHLIST(envptr, last);
}
} else
fputs("\tloadpath is empty\n", stderr);
#ifdef GNUPLOT_SHARE_DIR
fprintf(stderr,"\tgnuplotrc is read from %s\n",GNUPLOT_SHARE_DIR);
#endif
#ifdef X11
if ((appdir = getenv("XAPPLRESDIR"))) {
fprintf(stderr,"\tenvironmental path for X11 application defaults: \"%s\"\n",
appdir);
}
#ifdef XAPPLRESDIR
else {
fprintf(stderr,"\tno XAPPLRESDIR found in the environment,\n");
fprintf(stderr,"\t falling back to \"%s\"\n", XAPPLRESDIR);
}
#endif
#endif
break;
case ACTION_SAVE:
/* we don't save the load path taken from the
* environment, so don't go beyond envptr when
* extracting the path elements
*/
limit = envptr;
case ACTION_GET:
/* subsequent calls to get_loadpath() return all
* elements of the loadpath until exhausted
*/
FPRINTF((stderr, "Get loadpath\n"));
if (!loadpath)
return NULL;
if (!p) {
/* init section */
p = loadpath;
if (!limit)
limit = last;
} else {
/* skip over '\0' */
p += strlen(p) + 1;
}
if (p >= limit)
limit = p = NULL;
return p;
break;
case ACTION_NULL:
/* just return */
default:
break;
}
/* should always be ignored - points to the
* first path in the list */
return loadpath;
}
struct path_table {
const char *dir;
};
/* Yet, no special font paths for these operating systems:
* MSDOS, NeXT, ultrix, VMS, _IBMR2, alliant
*
* Environmental variables are written as $(name).
* Commands are written as $`command`.
*/
#if defined(OS2) && !defined(FONTPATHSET)
# define FONTPATHSET
static const struct path_table fontpath_tbl[] =
{
{ "$(BOOTDIR)/PSFONTS" },
/* X11 */
{ "$(X11ROOT)/X11R6/lib/X11/fonts/Type1" },
{ NULL }
};
#endif
#if defined(_Windows) && !defined(FONTPATHSET)
# define FONTPATHSET
static const struct path_table fontpath_tbl[] =
{
{ "$(windir)\\fonts" },
/* Ghostscript */
{ "c:\\gs\\fonts" },
/* X11 */
{ "$(CYGWIN_ROOT)\\usr\\X11R6\\lib\\X11\\fonts\\Type1" },
#ifdef HAVE_KPSEXPAND
/* fpTeX */
{ "$`kpsewhich -expand-path=$HOMETEXMF`\\fonts\\type1!" },
{ "$`kpsewhich -expand-path=$TEXMFLOCAL`\\fonts\\type1!" },
{ "$`kpsewhich -expand-path=$TEXMFMAIN`\\fonts\\type1!" },
{ "$`kpsewhich -expand-path=$TEXMFDIST`\\fonts\\type1!" },
#endif
{ NULL }
};
#endif
#if defined(__APPLE__) && !defined(FONTPATHSET)
# define FONTPATHSET
static const struct path_table fontpath_tbl[] =
{
{ "/System/Library/Fonts!" },
{ "/Library/Fonts!" },
{ "$(HOME)/Library/Fonts!" },
{ NULL }
};
#endif
#if defined(VMS) && !defined(FONTPATHSET)
# define FONTPATHSET
static const struct path_table fontpath_tbl[] =
{
{ "SYS$COMMON:[SYSFONT]!" },
{ NULL }
};
#endif
/* Fallback: Should work for unix */
#ifndef FONTPATHSET
static const struct path_table fontpath_tbl[] =
{
#ifdef HAVE_KPSEXPAND
/* teTeX or TeXLive */
{ "$`kpsexpand '$HOMETEXMF'`/fonts/type1!" },
{ "$`kpsexpand '$TEXMFLOCAL'`/fonts/type1!" },
{ "$`kpsexpand '$TEXMFMAIN'`/fonts/type1!" },
{ "$`kpsexpand '$TEXMFDIST'`/fonts/type1!" },
#endif
/* Linux paths */
{ "/usr/X11R6/lib/X11/fonts/Type1" },
{ "/usr/X11R6/lib/X11/fonts/truetype" },
/* HP-UX */
{ "/usr/lib/X11/fonts!"},
/* Ghostscript */
{ "/usr/share/ghostscript/fonts" },
{ "/usr/local/share/ghostscript/fonts" },
{ NULL }
};
#endif
#undef FONTPATHSET
static TBOOLEAN fontpath_init_done = FALSE;
/*
* char *fontpath_handler (int, char *)
*
*/
char *
fontpath_handler(int action, char *path)
{
/* fontpath variable
* the path elements are '\0' separated (!)
* this way, reading out fontpath is very
* easy to implement */
static char *fontpath;
/* index pointer, end of fontpath,
* env section of fontpath, current limit, in that order */
static char *p, *last, *envptr, *limit;
if (!fontpath_init_done) {
fontpath_init_done = TRUE;
init_fontpath();
}
switch (action) {
case ACTION_CLEAR:
/* Clear fontpath, fall through to init */
FPRINTF((stderr, "Clear fontpath\n"));
free(fontpath);
fontpath = p = last = NULL;
/* HBB 20000726: 'limit' has to be initialized to NULL, too! */
limit = NULL;
case ACTION_INIT:
/* Init fontpath from environment */
FPRINTF((stderr, "Init fontpath from environment\n"));
assert(fontpath == NULL);
if (!fontpath)
{
char *envlib = getenv("GNUPLOT_FONTPATH");
if (envlib) {
/* get paths from environment */
int len = strlen(envlib);
fontpath = gp_strdup(envlib);
/* point to end of fontpath */
last = fontpath + len;
/* convert all PATHSEPs to \0 */
PATHSEP_TO_NUL(fontpath);
}
#if defined(HAVE_DIRENT_H) || defined(_Windows)
else {
/* set hardcoded paths */
const struct path_table *curr_fontpath = fontpath_tbl;
while (curr_fontpath->dir) {
char *currdir = NULL;
char *envbeg = NULL;
# if defined(PIPES)
char *cmdbeg = NULL;
# endif
TBOOLEAN subdirs = FALSE;
currdir = gp_strdup( curr_fontpath->dir );
while ( (envbeg=strstr(currdir, "$("))
# if defined(PIPES)
|| (cmdbeg=strstr( currdir, "$`" ))
# endif
) {
/* Read environment variables */
if (envbeg) {
char *tmpdir = NULL;
char *envend = NULL, *envval = NULL;
unsigned int envlen;
envend = strchr(envbeg+2,')');
envend[0] = '\0';
envval = getenv(envbeg+2);
envend[0] = ')';
envlen = envval ? strlen(envval) : 0;
tmpdir = gp_alloc(strlen(currdir)+envlen
+envbeg-envend+1,
"expand fontpath");
strncpy(tmpdir,currdir,envbeg-currdir);
if (envval)
strcpy(tmpdir+(envbeg-currdir),envval);
strcpy(tmpdir+(envbeg-currdir+envlen), envend+1);
free(currdir);
currdir = tmpdir;
}
# if defined(PIPES)
/* Read environment variables */
else if (cmdbeg) {
char *tmpdir = NULL;
char *envend = NULL;
char envval[256];
unsigned int envlen;
FILE *fcmd;
envend = strchr(cmdbeg+2,'`');
envend[0] = '\0';
restrict_popen();
fcmd = popen(cmdbeg+2,"r");
if (fcmd) {
fgets(envval,255,fcmd);
if (envval[strlen(envval)-1]=='\n')
envval[strlen(envval)-1]='\0';
pclose(fcmd);
}
envend[0] = '`';
envlen = strlen(envval);
tmpdir = gp_alloc(strlen(currdir)+envlen
+cmdbeg-envend+1,
"expand fontpath");
strncpy(tmpdir,currdir,cmdbeg-currdir);
if (*envval)
strcpy(tmpdir+(cmdbeg-currdir),envval);
strcpy(tmpdir+(cmdbeg-currdir+envlen), envend+1);
free(currdir);
currdir = tmpdir;
}
# endif
}
if ( currdir[strlen(currdir)-1] == '!' ) {
/* search subdirectories */
/* delete ! from directory name */
currdir[strlen(currdir)-1] = '\0';
subdirs = TRUE;
}
if ( existdir( currdir ) ) {
size_t plen;
if ( subdirs )
/* add ! to directory name again */
currdir[strlen(currdir)] = '!';
plen = strlen(currdir);
if (fontpath) {
size_t elen = strlen(fontpath);
fontpath = gp_realloc(fontpath,
elen + 1 + plen + 1,
"expand fontpath");
last = fontpath+elen;
*last = PATHSEP;
++last;
*last = '\0';
} else {
fontpath = gp_alloc(plen + 1,
"expand fontpath");
last = fontpath;
}
strcpy(last, currdir );
last += plen;
}
curr_fontpath++;
if (currdir) {
free(currdir);
currdir = NULL;
}
}
/* convert all PATHSEPs to \0 */
if (fontpath)
PATHSEP_TO_NUL(fontpath);
}
#endif /* HAVE_DIRENT_H */
} /* else: already initialised; int_warn (?) */
/* point to env portion of fontpath */
envptr = fontpath;
break;
case ACTION_SET:
/* set the fontpath */
FPRINTF((stderr, "Set fontpath\n"));
if (path && *path != NUL) {
/* length of env portion */
size_t elen = last - envptr;
size_t plen = strlen(path);
if (fontpath && envptr) {
/* we are prepending a path name; because
* realloc() preserves only the contents up
* to the minimum of old and new size, we move
* the part to be preserved to the beginning
* of the string; use memmove() because strings
* may overlap */
memmove(fontpath, envptr, elen + 1);
}
fontpath = gp_realloc(fontpath, elen + 1 + plen + 1, "expand fontpath");
/* now move env part back to the end to make space for
* the new path */
memmove(fontpath + plen + 1, fontpath, elen + 1);
strcpy(fontpath, path);
/* separate new path(s) and env path(s) */
fontpath[plen] = PATHSEP;
/* adjust pointer to env part and last */
envptr = &fontpath[plen+1];
last = envptr + elen;
PATHSEP_TO_NUL(fontpath);
} /* else: NULL = empty */
break;
case ACTION_SHOW:
/* print the current, full fontpath */
FPRINTF((stderr, "Show fontpath\n"));
if (fontpath) {
fputs("\tfontpath is ", stderr);
PRINT_PATHLIST(fontpath, envptr);
if (envptr) {
/* env part */
fputs("\tsystem fontpath is ", stderr);
PRINT_PATHLIST(envptr, last);
}
} else
fputs("\tfontpath is empty\n", stderr);
break;
case ACTION_SAVE:
/* we don't save the font path taken from the
* environment, so don't go beyond envptr when
* extracting the path elements
*/
limit = envptr;
case ACTION_GET:
/* subsequent calls to get_fontpath() return all
* elements of the fontpath until exhausted
*/
FPRINTF((stderr, "Get fontpath\n"));
if (!fontpath)
return NULL;
if (!p) {
/* init section */
p = fontpath;
if (!limit)
limit = last;
} else {
/* skip over '\0' */
p += strlen(p) + 1;
}
if (p >= limit)
limit = p = NULL;
return p;
case ACTION_NULL:
/* just return */
default:
break;
}
/* should always be ignored - points to the
* first path in the list */
return fontpath;
}
/* not set or shown directly, but controlled by 'set locale'
* defined in national.h
*/
char full_month_names[12][32] =
{ FMON01, FMON02, FMON03, FMON04, FMON05, FMON06, FMON07, FMON08, FMON09, FMON10, FMON11, FMON12 };
char abbrev_month_names[12][8] =
{ AMON01, AMON02, AMON03, AMON04, AMON05, AMON06, AMON07, AMON08, AMON09, AMON10, AMON11, AMON12 };
char full_day_names[7][32] =
{ FDAY0, FDAY1, FDAY2, FDAY3, FDAY4, FDAY5, FDAY6 };
char abbrev_day_names[7][8] =
{ ADAY0, ADAY1, ADAY2, ADAY3, ADAY4, ADAY5, ADAY6 };
char *
locale_handler(int action, char *newlocale)
{
struct tm tm;
int i;
switch(action) {
case ACTION_CLEAR:
case ACTION_INIT:
free(current_locale);
#ifdef HAVE_LOCALE_H
setlocale(LC_TIME, "");
setlocale(LC_CTYPE, "");
current_locale = gp_strdup(setlocale(LC_TIME,NULL));
#else
current_locale = gp_strdup(INITIAL_LOCALE);
#endif
break;
case ACTION_SET:
#ifdef HAVE_LOCALE_H
if (setlocale(LC_TIME, newlocale)) {
free(current_locale);
current_locale = gp_strdup(setlocale(LC_TIME,NULL));
} else {
int_error(c_token, "Locale not available");
}
/* we can do a *lot* better than this ; eg use system functions
* where available; create values on first use, etc
*/
memset(&tm, 0, sizeof(struct tm));
for (i = 0; i < 7; ++i) {
tm.tm_wday = i; /* hope this enough */
strftime(full_day_names[i], sizeof(full_day_names[i]), "%A", &tm);
strftime(abbrev_day_names[i], sizeof(abbrev_day_names[i]), "%a", &tm);
}
for (i = 0; i < 12; ++i) {
tm.tm_mon = i; /* hope this enough */
strftime(full_month_names[i], sizeof(full_month_names[i]), "%B", &tm);
strftime(abbrev_month_names[i], sizeof(abbrev_month_names[i]), "%b", &tm);
}
#else
current_locale = gp_realloc(current_locale, strlen(newlocale) + 1, "locale");
strcpy(current_locale, newlocale);
#endif /* HAVE_LOCALE_H */
break;
case ACTION_SHOW:
#ifdef HAVE_LOCALE_H
fprintf(stderr, "\tgnuplot LC_CTYPE %s\n", setlocale(LC_CTYPE,NULL));
fprintf(stderr, "\tgnuplot encoding %s\n", encoding_names[encoding]);
fprintf(stderr, "\tgnuplot LC_TIME %s\n", setlocale(LC_TIME,NULL));
fprintf(stderr, "\tgnuplot LC_NUMERIC %s\n", numeric_locale ? numeric_locale : "C");
#else
fprintf(stderr, "\tlocale is \"%s\"\n", current_locale);
#endif
break;
case ACTION_GET:
default:
break;
}
return current_locale;
}
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