1 files changed, 132 insertions, 0 deletions
diff --git a/contrib/groff/src/libs/libgroff/searchpath.cpp b/contrib/groff/src/libs/libgroff/searchpath.cpp
new file mode 100644
index 0000000..1f8b233
--- /dev/null
+++ b/contrib/groff/src/libs/libgroff/searchpath.cpp
@@ -0,0 +1,132 @@
+// -*- C++ -*-
+/* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2001
+   Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+groff 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 General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License along
+with groff; see the file COPYING.  If not, write to the Free Software
+Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "lib.h"
+
+#include <stdlib.h>
+#include <assert.h>
+
+#include "searchpath.h"
+#include "nonposix.h"
+
+search_path::search_path(const char *envvar, const char *standard,
+			 int add_home, int add_current)
+{
+  char *home = 0;
+  if (add_home)
+    home = getenv("HOME");
+  char *e = 0;
+  if (envvar)
+    e = getenv(envvar);
+  dirs = new char[((e && *e) ? strlen(e) + 1 : 0)
+		  + (add_current ? 1 + 1 : 0)
+		  + ((home && *home) ? strlen(home) + 1 : 0)
+		  + ((standard && *standard) ? strlen(standard) : 0)
+		  + 1];
+  *dirs = '\0';
+  if (e && *e) {
+    strcat(dirs, e);
+    strcat(dirs, PATH_SEP);
+  }
+  if (add_current) {
+    strcat(dirs, ".");
+    strcat(dirs, PATH_SEP);
+  }
+  if (home && *home) {
+    strcat(dirs, home);
+    strcat(dirs, PATH_SEP);
+  }
+  if (standard && *standard)
+    strcat(dirs, standard);
+  init_len = strlen(dirs);
+}
+
+search_path::~search_path()
+{
+  // dirs is always allocated
+  a_delete dirs;
+}
+
+void search_path::command_line_dir(const char *s)
+{
+  char *old = dirs;
+  unsigned old_len = strlen(old);
+  unsigned slen = strlen(s);
+  dirs = new char[old_len + 1 + slen + 1];
+  memcpy(dirs, old, old_len - init_len);
+  char *p = dirs;
+  p += old_len - init_len;
+  if (init_len == 0)
+    *p++ = PATH_SEP[0];
+  memcpy(p, s, slen);
+  p += slen;
+  if (init_len > 0) {
+    *p++ = PATH_SEP[0];
+    memcpy(p, old + old_len - init_len, init_len);
+    p += init_len;
+  }
+  *p++ = '\0';
+  a_delete old;
+}
+
+FILE *search_path::open_file(const char *name, char **pathp)
+{
+  assert(name != 0);
+  if (IS_ABSOLUTE(name) || *dirs == '\0') {
+    FILE *fp = fopen(name, "r");
+    if (fp) {
+      if (pathp)
+	*pathp = strsave(name);
+      return fp;
+    }
+    else
+      return 0;
+  }
+  unsigned namelen = strlen(name);
+  char *p = dirs;
+  for (;;) {
+    char *end = strchr(p, PATH_SEP[0]);
+    if (!end)
+      end = strchr(p, '\0');
+    int need_slash = end > p && strchr(DIR_SEPS, end[-1]) == 0;
+    char *path = new char[(end - p) + need_slash + namelen + 1];
+    memcpy(path, p, end - p);
+    if (need_slash)
+      path[end - p] = '/';
+    strcpy(path + (end - p) + need_slash, name);
+#if 0
+    fprintf(stderr, "trying `%s'\n", path);
+#endif
+    FILE *fp = fopen(path, "r");
+    if (fp) {
+      if (pathp)
+	*pathp = path;
+      else
+	a_delete path;
+      return fp;
+    }
+    a_delete path;
+    if (*end == '\0')
+      break;
+    p = end + 1;
+  }
+  return 0;
+}