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#ifndef lint |
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static const char RCSid[] = "$Id: fropen.c,v 2.15 2012/06/29 23:09:06 greg Exp $"; |
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#endif |
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/* |
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* Find and open a Radiance library file. |
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* |
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* External symbols declared in rtio.h |
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*/ |
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|
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#include "copyright.h" |
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|
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#include <stdio.h> |
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|
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#include "rtio.h" |
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#include "paths.h" |
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|
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|
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FILE * |
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frlibopen( /* find file and open for reading */ |
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char *fname |
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) |
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{ |
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FILE *fp; |
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char pname[PATH_MAX]; |
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char *sp, *cp; |
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|
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if (fname == NULL) |
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return(NULL); |
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|
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if (ISABS(fname) || fname[0] == '.') /* absolute path */ |
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return(fopen(fname, "r")); |
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/* check search path */ |
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sp = getrlibpath(); |
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do { |
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cp = pname; |
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while (*sp && (*cp = *sp++) != PATHSEP) |
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cp++; |
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if (cp > pname && !ISDIRSEP(cp[-1])) |
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*cp++ = DIRSEP; |
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strcpy(cp, fname); |
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if ((fp = fopen(pname, "r")) != NULL) |
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return(fp); /* got it! */ |
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} while (*sp); |
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/* not found */ |
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return(NULL); |
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} |
