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Plan 9's rc.

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not a clear win over byron's,
but at least it has the right syntax.
This commit is contained in:
rsc 2003-11-23 18:04:08 +00:00
parent 5993a8f275
commit f08fdedcee
24 changed files with 4688 additions and 0 deletions
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59
src/cmd/rc/subr.c Normal file
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#include "rc.h"
#include "exec.h"
#include "io.h"
#include "fns.h"
char *emalloc(long n){
char *p=(char *)Malloc(n);
if(p==0) panic("Can't malloc %d bytes", n);
/* if(err){ pfmt(err, "malloc %d->%p\n", n, p); flush(err); } *//**/
return p;
}
void efree(char *p)
{
/* pfmt(err, "free %p\n", p); flush(err); *//**/
if(p) free(p);
else pfmt(err, "free 0\n");
}
extern int lastword, lastdol;
void yyerror(char *m)
{
pfmt(err, "rc: ");
if(runq->cmdfile && !runq->iflag)
pfmt(err, "%s:%d: ", runq->cmdfile, runq->lineno);
else if(runq->cmdfile)
pfmt(err, "%s: ", runq->cmdfile);
else if(!runq->iflag)
pfmt(err, "line %d: ", runq->lineno);
if(tok[0] && tok[0]!='\n') pfmt(err, "token %q: ", tok);
pfmt(err, "%s\n", m);
flush(err);
lastword=0;
lastdol=0;
while(lastc!='\n' && lastc!=EOF) advance();
nerror++;
setvar("status", newword(m, (word *)0));
}
char *bp;
void iacvt(int n){
if(n<0){
*bp++='-';
n=-n; /* doesn't work for n==-inf */
}
if(n/10)
iacvt(n/10);
*bp++=n%10+'0';
}
void itoa(char *s, long n)
{
bp=s;
iacvt(n);
*bp='\0';
}
void panic(char *s, int n)
{
pfmt(err, "rc: ");
pfmt(err, s, n);
pchr(err, '\n');
flush(err);
Abort();
}