1 /*****************************************************************************/
5 /* Include path handling for cc65 */
9 /* (C) 2000 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* SysIncludePath = 0;
61 static char* UserIncludePath = 0;
65 /*****************************************************************************/
67 /*****************************************************************************/
71 static char* Add (char* Orig, const char* New)
72 /* Create a new path from Orig and New, delete Orig, return the result */
74 unsigned OrigLen, NewLen;
77 /* Get the length of the original string */
78 OrigLen = Orig? strlen (Orig) : 0;
80 /* Get the length of the new path */
81 NewLen = strlen (New);
83 /* Check for a trailing path separator and remove it */
84 if (NewLen > 0 && (New [NewLen-1] == '\\' || New [NewLen-1] == '/')) {
88 /* Allocate memory for the new string */
89 NewPath = (char*) xmalloc (OrigLen + NewLen + 2);
91 /* Copy the strings */
92 memcpy (NewPath, Orig, OrigLen);
93 memcpy (NewPath+OrigLen, New, NewLen);
94 NewPath [OrigLen+NewLen+0] = ';';
95 NewPath [OrigLen+NewLen+1] = '\0';
97 /* Delete the original path */
100 /* Return the new path */
106 static char* Find (const char* Path, const char* File)
107 /* Search for a file in a list of directories. If found, return the complete
108 * name including the path in a malloced data area, if not found, return 0.
113 char PathName [FILENAME_MAX];
115 /* Initialize variables */
116 Max = sizeof (PathName) - strlen (File) - 2;
122 /* Handle a NULL pointer as replacement for an empty string */
127 /* Start the search */
129 /* Copy the next path element into the buffer */
131 while (*P != '\0' && *P != ';' && Count < Max) {
132 PathName [Count++] = *P++;
135 /* Add a path separator and the filename */
137 PathName [Count++] = '/';
139 strcpy (PathName + Count, File);
141 /* Check if this file exists */
142 if (access (PathName, 0) == 0) {
143 /* The file exists */
144 return xstrdup (PathName);
147 /* Skip a list separator if we have one */
159 void AddIncludePath (const char* NewPath, unsigned Where)
160 /* Add a new include path to the existing one */
162 /* Allow a NULL path */
164 if (Where & INC_SYS) {
165 SysIncludePath = Add (SysIncludePath, NewPath);
167 if (Where & INC_USER) {
168 UserIncludePath = Add (UserIncludePath, NewPath);
175 char* FindInclude (const char* Name, unsigned Where)
176 /* Find an include file. Return a pointer to a malloced area that contains
177 * the complete path, if found, return 0 otherwise.
180 if (Where & INC_SYS) {
181 /* Search in the system include directories */
182 return Find (SysIncludePath, Name);
184 if (Where & INC_USER) {
185 /* Search in the user include directories */
186 return Find (UserIncludePath, Name);