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- //
- // "$Id: filename_expand.cxx,v 1.4 1999/01/07 19:17:34 mike Exp $"
- //
- // Filename expansion routines for the Fast Light Tool Kit (FLTK).
- //
- // Copyright 1998-1999 by Bill Spitzak and others.
- //
- // This library is free software; you can redistribute it and/or
- // modify it under the terms of the GNU Library General Public
- // License as published by the Free Software Foundation; either
- // version 2 of the License, or (at your option) any later version.
- //
- // This library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- // Library General Public License for more details.
- //
- // You should have received a copy of the GNU Library General Public
- // License along with this library; if not, write to the Free Software
- // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- // USA.
- //
- // Please report all bugs and problems to "fltk-bugs@easysw.com".
- //
-
- /* expand a file name by substuting environment variables and
- home directories. Returns true if any changes were made.
- to & from may be the same buffer.
- */
-
- #include <FL/filename.H>
- #include <stdlib.h>
- #include <string.h>
- #ifdef WIN32
- #else
- # include <unistd.h>
- # include <pwd.h>
- #endif
-
- #if defined(WIN32) || defined(__EMX__)
- static inline int isdirsep(char c) {return c=='/' || c=='\\';}
- #else
- #define isdirsep(c) ((c)=='/')
- #endif
-
- int filename_expand(char *to,const char *from) {
-
- char temp[FL_PATH_MAX];
- strcpy(temp,from);
- const char *start = temp;
- const char *end = temp+strlen(temp);
-
- int ret = 0;
-
- for (char *a=temp; a<end; ) { // for each slash component
- char *e; for (e=a; e<end && !isdirsep(*e); e++); // find next slash
- const char *value = 0; // this will point at substitute value
- switch (*a) {
- case '~': // a home directory name
- if (e <= a+1) { // current user's directory
- value = getenv("HOME");
- #ifndef WIN32
- } else { // another user's directory
- struct passwd *pwd;
- char t = *e; *(char *)e = 0;
- pwd = getpwnam(a+1);
- *(char *)e = t;
- if (pwd) value = pwd->pw_dir;
- #endif
- }
- break;
- case '$': /* an environment variable */
- {char t = *e; *(char *)e = 0; value = getenv(a+1); *(char *)e = t;}
- break;
- }
- if (value) {
- // substitutions that start with slash delete everything before them:
- if (isdirsep(value[0])) start = a;
- #if defined(WIN32) || defined(__EMX__)
- // also if it starts with "A:"
- if (value[0] && value[1]==':') start = a;
- #endif
- int t = strlen(value); if (isdirsep(value[t-1])) t--;
- memmove(a+t, e, end+1-e);
- end = a+t+(end-e);
- memcpy(a, value, t);
- ret++;
- } else {
- a = e+1;
- #if defined(WIN32) || defined(__EMX__)
- if (*e == '\\') {*e = '/'; ret++;} // ha ha!
- #endif
- }
- }
- strcpy(to,start);
- return ret;
- }
-
- //
- // End of "$Id: filename_expand.cxx,v 1.4 1999/01/07 19:17:34 mike Exp $".
- //
-