| 1 |
greg |
1.1 |
#ifndef lint |
| 2 |
greg |
2.14 |
static const char RCSid[] = "$Id: fropen.c,v 2.13 2003/07/17 09:21:29 schorsch Exp $"; |
| 3 |
greg |
1.1 |
#endif |
| 4 |
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/* |
| 5 |
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* Find and open a Radiance library file. |
| 6 |
greg |
2.8 |
* |
| 7 |
greg |
2.14 |
* External symbols declared in rtio.h |
| 8 |
greg |
2.8 |
*/ |
| 9 |
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| 10 |
greg |
2.9 |
#include "copyright.h" |
| 11 |
greg |
1.1 |
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| 12 |
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#include <stdio.h> |
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| 14 |
schorsch |
2.13 |
#include "rtio.h" |
| 15 |
greg |
2.4 |
#include "paths.h" |
| 16 |
greg |
1.1 |
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| 17 |
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| 18 |
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FILE * |
| 19 |
greg |
2.7 |
frlibopen(fname) /* find file and open for reading */ |
| 20 |
greg |
1.1 |
register char *fname; |
| 21 |
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{ |
| 22 |
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FILE *fp; |
| 23 |
schorsch |
2.11 |
char pname[PATH_MAX]; |
| 24 |
greg |
1.1 |
register char *sp, *cp; |
| 25 |
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| 26 |
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if (fname == NULL) |
| 27 |
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return(NULL); |
| 28 |
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| 29 |
greg |
2.5 |
if (ISDIRSEP(fname[0]) || fname[0] == '.') /* absolute path */ |
| 30 |
greg |
1.1 |
return(fopen(fname, "r")); |
| 31 |
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/* check search path */ |
| 32 |
greg |
2.10 |
sp = getrlibpath(); |
| 33 |
greg |
1.1 |
do { |
| 34 |
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cp = pname; |
| 35 |
greg |
2.3 |
while (*sp && (*cp = *sp++) != PATHSEP) |
| 36 |
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cp++; |
| 37 |
greg |
2.5 |
if (cp > pname && !ISDIRSEP(cp[-1])) |
| 38 |
greg |
2.3 |
*cp++ = DIRSEP; |
| 39 |
greg |
1.1 |
strcpy(cp, fname); |
| 40 |
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if ((fp = fopen(pname, "r")) != NULL) |
| 41 |
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return(fp); /* got it! */ |
| 42 |
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} while (*sp); |
| 43 |
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/* not found */ |
| 44 |
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return(NULL); |
| 45 |
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} |
