--- /dev/null
+/*****************************************************************************/
+/* */
+/* searchpath.h */
+/* */
+/* Search path path handling for ld65 */
+/* */
+/* */
+/* */
+/* (C) 2000-2003 Ullrich von Bassewitz */
+/* Römerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
+/* */
+/* */
+/* This software is provided 'as-is', without any expressed or implied */
+/* warranty. In no event will the authors be held liable for any damages */
+/* arising from the use of this software. */
+/* */
+/* Permission is granted to anyone to use this software for any purpose, */
+/* including commercial applications, and to alter it and redistribute it */
+/* freely, subject to the following restrictions: */
+/* */
+/* 1. The origin of this software must not be misrepresented; you must not */
+/* claim that you wrote the original software. If you use this software */
+/* in a product, an acknowledgment in the product documentation would be */
+/* appreciated but is not required. */
+/* 2. Altered source versions must be plainly marked as such, and must not */
+/* be misrepresented as being the original software. */
+/* 3. This notice may not be removed or altered from any source */
+/* distribution. */
+/* */
+/*****************************************************************************/
+
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#if defined(_MSC_VER)
+/* Microsoft compiler */
+# include <io.h>
+#else
+/* Anyone else */
+# include <unistd.h>
+#endif
+
+/* common */
+#include "searchpath.h"
+#include "xmalloc.h"
+
+
+
+/*****************************************************************************/
+/* Data */
+/*****************************************************************************/
+
+
+
+static char* SearchPaths[MAX_SEARCH_PATHS];
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+static char* Add (char* Orig, const char* New)
+/* Create a new path from Orig and New, delete Orig, return the result */
+{
+ unsigned OrigLen, NewLen;
+ char* NewPath;
+
+ /* Get the length of the original string */
+ OrigLen = Orig? strlen (Orig) : 0;
+
+ /* Get the length of the new path */
+ NewLen = strlen (New);
+
+ /* Check for a trailing path separator and remove it */
+ if (NewLen > 0 && (New [NewLen-1] == '\\' || New [NewLen-1] == '/')) {
+ --NewLen;
+ }
+
+ /* Allocate memory for the new string */
+ NewPath = (char*) xmalloc (OrigLen + NewLen + 2);
+
+ /* Copy the strings */
+ memcpy (NewPath, Orig, OrigLen);
+ memcpy (NewPath+OrigLen, New, NewLen);
+ NewPath [OrigLen+NewLen+0] = ';';
+ NewPath [OrigLen+NewLen+1] = '\0';
+
+ /* Delete the original path */
+ xfree (Orig);
+
+ /* Return the new path */
+ return NewPath;
+}
+
+
+
+static char* Find (const char* Path, const char* File)
+/* Search for a file in a list of directories. If found, return the complete
+ * name including the path in a malloced data area, if not found, return 0.
+ */
+{
+ const char* P;
+ int Max;
+ char PathName [FILENAME_MAX];
+
+ /* Initialize variables */
+ Max = sizeof (PathName) - strlen (File) - 2;
+ if (Max < 0) {
+ return 0;
+ }
+ P = Path;
+
+ /* Handle a NULL pointer as replacement for an empty string */
+ if (P == 0) {
+ P = "";
+ }
+
+ /* Start the search */
+ while (*P) {
+ /* Copy the next path element into the buffer */
+ int Count = 0;
+ while (*P != '\0' && *P != ';' && Count < Max) {
+ PathName [Count++] = *P++;
+ }
+
+ /* Add a path separator and the filename */
+ if (Count) {
+ PathName [Count++] = '/';
+ }
+ strcpy (PathName + Count, File);
+
+ /* Check if this file exists */
+ if (access (PathName, 0) == 0) {
+ /* The file exists */
+ return xstrdup (PathName);
+ }
+
+ /* Skip a list separator if we have one */
+ if (*P == ';') {
+ ++P;
+ }
+ }
+
+ /* Not found */
+ return 0;
+}
+
+
+
+void AddSearchPath (const char* NewPath, unsigned Where)
+/* Add a new search path to the existing one */
+{
+ /* Allow a NULL path */
+ if (NewPath) {
+ unsigned I;
+ for (I = 0; I < MAX_SEARCH_PATHS; ++I) {
+ unsigned Mask = (0x01U << I);
+ if (Where & Mask) {
+ SearchPaths[I] = Add (SearchPaths[I], NewPath);
+ }
+ ++I;
+ }
+ }
+}
+
+
+
+char* SearchFile (const char* Name, unsigned Where)
+/* Search for a file in a list of directories. Return a pointer to a malloced
+ * area that contains the complete path, if found, return 0 otherwise.
+ */
+{
+ unsigned I;
+ for (I = 0; I < MAX_SEARCH_PATHS; ++I) {
+ unsigned Mask = (0x01U << I);
+ if (Where & Mask) {
+ char* Path = Find (SearchPaths[I], Name);
+ if (Path) {
+ /* Found the file */
+ return Path;
+ }
+ }
+ ++I;
+ }
+ return 0;
+}
+
+
+
--- /dev/null
+/*****************************************************************************/
+/* */
+/* searchpath.h */
+/* */
+/* Search path path handling for ld65 */
+/* */
+/* */
+/* */
+/* (C) 2000-2003 Ullrich von Bassewitz */
+/* Römerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
+/* */
+/* */
+/* This software is provided 'as-is', without any expressed or implied */
+/* warranty. In no event will the authors be held liable for any damages */
+/* arising from the use of this software. */
+/* */
+/* Permission is granted to anyone to use this software for any purpose, */
+/* including commercial applications, and to alter it and redistribute it */
+/* freely, subject to the following restrictions: */
+/* */
+/* 1. The origin of this software must not be misrepresented; you must not */
+/* claim that you wrote the original software. If you use this software */
+/* in a product, an acknowledgment in the product documentation would be */
+/* appreciated but is not required. */
+/* 2. Altered source versions must be plainly marked as such, and must not */
+/* be misrepresented as being the original software. */
+/* 3. This notice may not be removed or altered from any source */
+/* distribution. */
+/* */
+/*****************************************************************************/
+
+
+
+/* Exports facilities to search files in a list of directories. 8 of these
+ * lists are managed, and each list can contain an arbitrary number of
+ * directories. The "Where" argument is actually a bitset, specifying which
+ * of the search lists should be used when adding paths or searching files.
+ */
+
+
+
+#ifndef SEARCHPATH_H
+#define SEARCHPATH_H
+
+
+
+/*****************************************************************************/
+/* Data */
+/*****************************************************************************/
+
+
+
+/* Maximum number of search paths */
+#define MAX_SEARCH_PATHS 8
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+void AddSearchPath (const char* NewPath, unsigned Where);
+/* Add a new search path to the existing one */
+
+char* SearchFile (const char* Name, unsigned Where);
+/* Search for a file in a list of directories. Return a pointer to a malloced
+ * area that contains the complete path, if found, return 0 otherwise.
+ */
+
+
+
+/* End of searchpath.h */
+#endif
+
+
+
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