1 /*****************************************************************************/
5 /* Chip path handling for the sim65 6502 simulator */
9 /* (C) 2000-2002 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@musoftware.de */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
39 /* Microsoft compiler */
54 /*****************************************************************************/
56 /*****************************************************************************/
60 static char* ChipPath = 0;
64 /*****************************************************************************/
66 /*****************************************************************************/
70 static char* Add (char* Orig, const char* New)
71 /* Create a new path from Orig and New, delete Orig, return the result */
73 unsigned OrigLen, NewLen;
76 /* Get the length of the original string */
77 OrigLen = Orig? strlen (Orig) : 0;
79 /* Get the length of the new path */
80 NewLen = strlen (New);
82 /* Check for a trailing path separator and remove it */
83 if (NewLen > 0 && (New [NewLen-1] == '\\' || New [NewLen-1] == '/')) {
87 /* Allocate memory for the new string */
88 NewPath = xmalloc (OrigLen + NewLen + 2);
90 /* Copy the strings */
91 memcpy (NewPath, Orig, OrigLen);
92 memcpy (NewPath+OrigLen, New, NewLen);
93 NewPath [OrigLen+NewLen+0] = ';';
94 NewPath [OrigLen+NewLen+1] = '\0';
96 /* Delete the original path */
99 /* Return the new path */
105 static char* Find (const char* Path, const char* File)
106 /* Search for a file in a list of directories. If found, return the complete
107 * name including the path in a malloced data area, if not found, return 0.
112 char PathName [FILENAME_MAX];
114 /* Initialize variables */
115 Max = sizeof (PathName) - strlen (File) - 2;
121 /* Handle a NULL pointer as replacement for an empty string */
126 /* Start the search */
128 /* Copy the next path element into the buffer */
130 while (*P != '\0' && *P != ';' && Count < Max) {
131 PathName [Count++] = *P++;
134 /* Add a path separator and the filename */
136 PathName [Count++] = '/';
138 strcpy (PathName + Count, File);
140 /* Check if this file exists */
141 if (access (PathName, 0) == 0) {
142 /* The file exists */
143 return xstrdup (PathName);
146 /* Skip a list separator if we have one */
158 void AddChipPath (const char* NewPath)
159 /* Add a search path for chips */
161 /* Allow a NULL path */
163 ChipPath = Add (ChipPath, NewPath);
169 char* FindChipLib (const char* LibName)
170 /* Find a chip library. Return a pointer to a malloced area that contains
171 * the complete path, if found, return 0 otherwise.
174 /* Search in the include directories */
175 return Find (ChipPath, LibName);