2 /* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2001, 2003
3 Free Software Foundation, Inc.
4 Written by James Clark (jjc@jclark.com)
6 This file is part of groff.
8 groff is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 groff is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License along
19 with groff; see the file COPYING. If not, write to the Free Software
20 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 #include "searchpath.h"
31 search_path::search_path(const char *envvar, const char *standard,
32 int add_home, int add_current)
36 home = getenv("HOME");
40 dirs = new char[((e && *e) ? strlen(e) + 1 : 0)
41 + (add_current ? 1 + 1 : 0)
42 + ((home && *home) ? strlen(home) + 1 : 0)
43 + ((standard && *standard) ? strlen(standard) : 0)
48 strcat(dirs, PATH_SEP);
52 strcat(dirs, PATH_SEP);
56 strcat(dirs, PATH_SEP);
58 if (standard && *standard)
59 strcat(dirs, standard);
60 init_len = strlen(dirs);
63 search_path::~search_path()
65 // dirs is always allocated
69 void search_path::command_line_dir(const char *s)
72 unsigned old_len = strlen(old);
73 unsigned slen = strlen(s);
74 dirs = new char[old_len + 1 + slen + 1];
75 memcpy(dirs, old, old_len - init_len);
77 p += old_len - init_len;
84 memcpy(p, old + old_len - init_len, init_len);
91 FILE *search_path::open_file(const char *name, char **pathp)
94 if (IS_ABSOLUTE(name) || *dirs == '\0') {
95 FILE *fp = fopen(name, "r");
98 *pathp = strsave(name);
104 unsigned namelen = strlen(name);
107 char *end = strchr(p, PATH_SEP_CHAR);
109 end = strchr(p, '\0');
110 int need_slash = end > p && strchr(DIR_SEPS, end[-1]) == 0;
111 char *path = new char[(end - p) + need_slash + namelen + 1];
112 memcpy(path, p, end - p);
115 strcpy(path + (end - p) + need_slash, name);
117 fprintf(stderr, "trying `%s'\n", path);
119 FILE *fp = fopen(path, "r");
135 FILE *search_path::open_file_cautious(const char *name, char **pathp,
140 bool reading = (strchr(mode, 'r') != 0);
141 if (name == 0 || strcmp(name, "-") == 0) {
143 *pathp = strsave(reading ? "stdin" : "stdout");
144 return (reading ? stdin : stdout);
146 if (!reading || IS_ABSOLUTE(name) || *dirs == '\0') {
147 FILE *fp = fopen(name, mode);
150 *pathp = strsave(name);
156 unsigned namelen = strlen(name);
159 char *end = strchr(p, PATH_SEP_CHAR);
161 end = strchr(p, '\0');
162 int need_slash = end > p && strchr(DIR_SEPS, end[-1]) == 0;
163 char *path = new char[(end - p) + need_slash + namelen + 1];
164 memcpy(path, p, end - p);
167 strcpy(path + (end - p) + need_slash, name);
169 fprintf(stderr, "trying `%s'\n", path);
171 FILE *fp = fopen(path, mode);