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#ifndef lint
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static const char RCSid[] = "$Id: fropen.c,v 2.10 2003/05/13 17:58:32 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 standard.h
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*/
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#include "copyright.h"
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#include <stdio.h>
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#include "paths.h"
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FILE *
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frlibopen(fname) /* find file and open for reading */
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register char *fname;
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{
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extern char *strcpy(), *getrlibpath();
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FILE *fp;
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char pname[PATH_MAX];
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register char *sp, *cp;
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if (fname == NULL)
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return(NULL);
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if (ISDIRSEP(fname[0]) || 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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}
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