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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1986-2008 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* Glenn Fowler
* AT&T Research
*
* preprocessor library trace and debug support
*/
#include "pplib.h"
#include "ppfsm.h"
#include <ctype.h>
/*
* convert token string to printable form
*/
char*
pptokstr(register char* s, register int c)
{
register char* t;
static char buf[8];
if (t = s)
{
while (*t == ' ' || *t == '\t') t++;
c = *t ? *t : *s;
}
switch (c)
{
case 0:
case 0400:
return("`EOF'");
case ' ':
return("`space'");
case '\f':
return("`formfeed'");
case '\n':
return("`newline'");
case '\t':
return("`tab'");
case '\v':
return("`vertical-tab'");
case T_TOKCAT:
return("##");
default:
if (iscntrl(c) || !isprint(c)) sfsprintf(buf, sizeof(buf), "`%03o'", c);
else if (s) return(s);
else sfsprintf(buf, sizeof(buf), "%c", c);
return(buf);
}
}
#if DEBUG & TRACE_debug
#include "ppdebug.h"
/*
* return input stream name given index
*/
char*
ppinstr(register struct ppinstk* p)
{
register int i;
static char buf[128];
for (i = 0; i < elementsof(ppinmap); i++)
if (p->type == ppinmap[i].val)
{
switch (p->type)
{
case IN_MACRO:
#if MACDEF
case IN_MULTILINE:
#endif
if (p->symbol)
{
sfsprintf(buf, sizeof(buf), "%s=%s", ppinmap[i].nam, p->symbol->name);
return(buf);
}
break;
}
return(ppinmap[i].nam);
}
sfsprintf(buf, sizeof(buf), "UNKNOWN[%d]", p->type);
return(buf);
}
/*
* return string given fsm lex state
*/
char*
pplexstr(register int lex)
{
register int i;
int splice;
static char buf[64];
if (lex < 0) lex &= ~lex;
splice = (lex & SPLICE);
lex &= 0x7f;
for (i = 0; i < (elementsof(pplexmap) - 1) && (lex > pplexmap[i].val || lex == pplexmap[i+1].val); i++);
if (lex != pplexmap[i].val)
{
if (pplexmap[i].val < 0) sfsprintf(buf, sizeof(buf), "%s|0x%04x%s", pplexmap[i].nam, lex, splice ? "|SPLICE" : "");
else sfsprintf(buf, sizeof(buf), "%s+%d", pplexmap[i-1].nam, lex - pplexmap[i-1].val, splice ? "|SPLICE" : "");
return(buf);
}
if (splice)
{
sfsprintf(buf, sizeof(buf), "%s|SPLICE", pplexmap[i].nam);
return(buf);
}
return(pplexmap[i].nam);
}
/*
* return string given map p of size n and flags
*/
static char*
ppflagstr(register struct map* p, int n, register long flags)
{
register int i;
register int k;
register char* s;
static char buf[128];
s = buf;
for (i = 0; i < n; i++)
if (flags & p[i].val)
{
k = strlen(p[i].nam);
if ((elementsof(buf) - 2 - (s - buf)) > k)
{
if (s > buf) *s++ = '|';
strcpy(s, p[i].nam);
s += k;
}
}
*s = 0;
return(buf);
}
/*
* return string given pp.mode
*/
char*
ppmodestr(register long mode)
{
return(ppflagstr(ppmodemap, elementsof(ppmodemap), mode));
}
/*
* return string given pp.option
*/
char*
ppoptionstr(register long option)
{
return(ppflagstr(ppoptionmap, elementsof(ppoptionmap), option));
}
/*
* return string given pp.state
*/
char*
ppstatestr(register long state)
{
return(ppflagstr(ppstatemap, elementsof(ppstatemap), state));
}
#include <sig.h>
/*
* io stream stack trace
* sig==0 registers the handler
*/
void
pptrace(int sig)
{
register char* s;
register char* x;
register struct ppinstk* p;
static int handling;
if (!sig)
{
#ifdef SIGBUS
signal(SIGBUS, pptrace);
#endif
#ifdef SIGSEGV
signal(SIGSEGV, pptrace);
#endif
#ifdef SIGILL
signal(SIGILL, pptrace);
#endif
signal(SIGQUIT, pptrace);
return;
}
s = fmtsignal(sig);
if (handling)
{
sfprintf(sfstderr, "\n%s during io stack trace\n", s);
signal(handling, SIG_DFL);
sigunblock(handling);
kill(getpid(), handling);
pause();
error(PANIC, "signal not redelivered");
}
handling = sig;
sfprintf(sfstderr, "\n%s - io stack trace\n", s);
for (p = pp.in; p->prev; p = p->prev)
{
sfprintf(sfstderr, "\n[%s]\n", ppinstr(p));
if ((s = pp.in->nextchr) && *s)
{
if (*s != '\n') sfputc(sfstderr, '\t');
x = s + 256;
while (*s && s < x)
{
sfputc(sfstderr, *s);
if (*s++ == '\n' && *s && *s != '\n') sfputc(sfstderr, '\t');
}
if (*s) sfprintf(sfstderr, " ...");
}
}
sfprintf(sfstderr, "\n");
handling = 0;
signal(sig, SIG_DFL);
sigunblock(sig);
kill(getpid(), sig);
pause();
error(PANIC, "signal not redelivered");
}
#endif
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