76 lines
1.1 KiB
C
76 lines
1.1 KiB
C
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/* builtin.c - built in named processes */
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#include "channel.h"
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#ifndef nil
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#define nil 0
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#endif
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extern int errno;
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static void nullterm(s) register char *s;
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/* Change Occam string to C string */
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{
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register len= (*s & 0377);
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register char *p;
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while (--len>=0) {
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p=s++;
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*p = *s;
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}
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*s=0;
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}
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static void lenterm(s) register char *s;
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/* Change C string to Occam string */
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{
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register i=0;
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register c0, c1;
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c0=0;
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do {
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c1=s[i];
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s[i++]=c0;
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c0=c1;
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} while (c0!=0);
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*s= i-1;
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}
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void b_open(mode, name, index) register char *mode, *name; long *index;
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/* PROC open(VAR index, VALUE name[], mode[])= */
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{
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register FILE *fp;
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register i;
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nullterm(name);
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nullterm(mode);
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fp=fopen(name, mode);
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lenterm(name);
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lenterm(mode);
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if (fp==nil)
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*index= -errno;
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else {
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/* Find free file channel, there must be one free! */
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for (i=0; (file[i].f.flgs&C_F_INUSE)!=0; i++) ;
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file[i].f.flgs|=C_F_INUSE;
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unix_file[i]=fp;
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*index=i;
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}
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}
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void b_close(index) long index;
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/* PROC close(VALUE index)= */
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{
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fclose(unix_file[index]);
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file[index].f.flgs&= ~C_F_INUSE;
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}
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void b_exit(code) long code;
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/* PROC exit(VALUE code)= */
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{
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exit((int) code);
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}
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