46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
#include <pc_file.h>
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#include <pc_err.h>
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#define BUFFLENGTH 512 /* number of items in buffer */
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extern struct file *_curfil; /* for error mesages from trap */
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extern _trp(); /* pc runtime trap routine */
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extern creat(); /* unix open for write */
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extern open(); /* unix open for read */
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static int initfile (desc,f) int desc; struct file *f; {
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_curfil=f;
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if ( (desc & WRBIT) == 0) {
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if ( (f->ufd = open(f->fname,0)) < 0 )
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_trp(ERESET);
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} else {
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if ( (f->ufd = creat(f->fname,0644)) < 0 )
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_trp(EREWR);
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}
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f->buflen = BUFFLENGTH;
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f->size = 1;
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f->ptr = f->bufadr;
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f->flags = desc;
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return(1);
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}
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/* as both the following routines are called from a pascal subroutine */
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/* and the pascal compiler has been fixed to alwayd supply static links */
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/* to non-global externals the parameter 'statlink' is a dummy to fill */
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/* the space occupied by the static link. The parameter is first instead */
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/* of last because of the C method of passing its parameters backwards */
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AOPN(statlink,f) int *statlink; struct file *f; {
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if ( initfile ((int)(MAGIC|TXTBIT),f) )
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f->count=0;
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}
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ACRE(statlink,f) int *statlink; struct file *f; {
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if ( initfile ((int)(WRBIT|EOFBIT|ELNBIT|MAGIC|TXTBIT),f) )
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f->count=f->buflen;
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}
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