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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <stdarg.h>
#include "cpp.h"
#define OUTS 16384
char outbuf[OUTS];
char *outptr = outbuf;
Source *cursource;
int nerrs;
struct token nltoken = {NL, 0, 0, 1, (uchar *) "\n", 0};
char *curtime;
int incdepth;
int ifdepth;
int ifsatisfied[NIF];
int skipping;
char rcsid[] = "$Version 1.2 $ $Revision: 1.5 $ $Date: 2006-06-20 05:05:46 $";
int
#ifdef _WIN32
__cdecl
#endif // _WIN32
main(int argc, char **argv)
{
Tokenrow tr;
time_t t;
char ebuf[BUFSIZ];
setbuf(stderr, ebuf);
t = time(NULL);
curtime = ctime(&t);
maketokenrow(3, &tr);
expandlex();
setup(argc, argv);
fixlex();
if (!Pflag)
genline();
process(&tr);
flushout();
fflush(stderr);
exit(nerrs > 0);
}
void
process(Tokenrow * trp)
{
int anymacros = 0;
for (;;)
{
if (trp->tp >= trp->lp)
{
trp->tp = trp->lp = trp->bp;
outptr = outbuf;
anymacros |= gettokens(trp, 1);
trp->tp = trp->bp;
}
if (trp->tp->type == END)
{
if (--incdepth >= 0)
{
if (cursource->ifdepth)
error(ERROR,
"Unterminated conditional in #include");
unsetsource();
cursource->line += cursource->lineinc;
trp->tp = trp->lp;
if (!Pflag)
genline();
continue;
}
if (ifdepth)
error(ERROR, "Unterminated #if/#ifdef/#ifndef");
break;
}
if (trp->tp->type == SHARP)
{
trp->tp += 1;
control(trp);
}
else
if (!skipping && anymacros)
expandrow(trp, NULL);
if (skipping)
setempty(trp);
puttokens(trp);
anymacros = 0;
cursource->line += cursource->lineinc;
if (cursource->lineinc > 1)
{
if (!Pflag)
genline();
}
}
}
void
control(Tokenrow * trp)
{
Nlist *np;
Token *tp;
tp = trp->tp;
if (tp->type != NAME)
{
if (tp->type == NUMBER)
goto kline;
if (tp->type != NL)
error(ERROR, "Unidentifiable control line");
return; /* else empty line */
}
if ((np = lookup(tp, 0)) == NULL || ((np->flag & ISKW) == 0 && !skipping))
{
error(WARNING, "Unknown preprocessor control %t", tp);
return;
}
if (skipping)
{
switch (np->val)
{
case KENDIF:
if (--ifdepth < skipping)
skipping = 0;
--cursource->ifdepth;
setempty(trp);
return;
case KIFDEF:
case KIFNDEF:
case KIF:
if (++ifdepth >= NIF)
error(FATAL, "#if too deeply nested");
++cursource->ifdepth;
return;
case KELIF:
case KELSE:
if (ifdepth <= skipping)
break;
return;
default:
return;
}
}
switch (np->val)
{
case KDEFINE:
dodefine(trp);
break;
case KUNDEF:
tp += 1;
if (tp->type != NAME || trp->lp - trp->bp != 4)
{
error(ERROR, "Syntax error in #undef");
break;
}
if ((np = lookup(tp, 0)) != NULL)
{
np->flag &= ~ISDEFINED;
if (Mflag)
{
if (np->ap)
error(INFO, "Macro deletion of %s(%r)", np->name, np->ap);
else
error(INFO, "Macro deletion of %s", np->name);
}
}
break;
case KPRAGMA:
case KIDENT:
for (tp = trp->tp - 1; ((tp->type != NL) && (tp < trp->lp)); tp++)
tp->type = UNCLASS;
return;
case KIFDEF:
case KIFNDEF:
case KIF:
if (++ifdepth >= NIF)
error(FATAL, "#if too deeply nested");
++cursource->ifdepth;
ifsatisfied[ifdepth] = 0;
if (eval(trp, np->val))
ifsatisfied[ifdepth] = 1;
else
skipping = ifdepth;
break;
case KELIF:
if (ifdepth == 0)
{
error(ERROR, "#elif with no #if");
return;
}
if (ifsatisfied[ifdepth] == 2)
error(ERROR, "#elif after #else");
if (eval(trp, np->val))
{
if (ifsatisfied[ifdepth])
skipping = ifdepth;
else
{
skipping = 0;
ifsatisfied[ifdepth] = 1;
}
}
else
skipping = ifdepth;
break;
case KELSE:
if (ifdepth == 0 || cursource->ifdepth == 0)
{
error(ERROR, "#else with no #if");
return;
}
if (ifsatisfied[ifdepth] == 2)
error(ERROR, "#else after #else");
if (trp->lp - trp->bp != 3)
error(ERROR, "Syntax error in #else");
skipping = ifsatisfied[ifdepth] ? ifdepth : 0;
ifsatisfied[ifdepth] = 2;
break;
case KENDIF:
if (ifdepth == 0 || cursource->ifdepth == 0)
{
error(ERROR, "#endif with no #if");
return;
}
--ifdepth;
--cursource->ifdepth;
if (trp->lp - trp->bp != 3)
error(WARNING, "Syntax error in #endif");
break;
case KERROR:
trp->tp = tp + 1;
error(WARNING, "#error directive: %r", trp);
break;
case KLINE:
trp->tp = tp + 1;
expandrow(trp, "<line>");
tp = trp->bp + 2;
kline:
if (tp + 1 >= trp->lp || tp->type != NUMBER || tp + 3 < trp->lp
|| (tp + 3 == trp->lp
&& ((tp + 1)->type != STRING || *(tp + 1)->t == 'L')))
{
error(ERROR, "Syntax error in #line");
return;
}
cursource->line = atol((char *) tp->t) - 1;
if (cursource->line < 0 || cursource->line >= 32768)
error(WARNING, "#line specifies number out of range");
tp = tp + 1;
if (tp + 1 < trp->lp)
cursource->filename = (char *) newstring(tp->t + 1, tp->len - 2, 0);
return;
case KDEFINED:
error(ERROR, "Bad syntax for control line");
break;
case KIMPORT:
doinclude(trp, -1, 1);
trp->lp = trp->bp;
return;
case KINCLUDE:
doinclude(trp, -1, 0);
trp->lp = trp->bp;
return;
case KINCLUDENEXT:
doinclude(trp, cursource->pathdepth, 0);
trp->lp = trp->bp;
return;
case KEVAL:
eval(trp, np->val);
break;
default:
error(ERROR, "Preprocessor control `%t' not yet implemented", tp);
break;
}
setempty(trp);
return;
}
void *
domalloc(int size)
{
void *p = malloc(size);
if (p == NULL)
error(FATAL, "Out of memory from malloc");
return p;
}
void
dofree(void *p)
{
free(p);
}
void
error(enum errtype type, char *string,...)
{
va_list ap;
char c, *cp, *ep;
Token *tp;
Tokenrow *trp;
Source *s;
int i;
fprintf(stderr, "cpp: ");
for (s = cursource; s; s = s->next)
if (*s->filename)
fprintf(stderr, "%s:%d ", s->filename, s->line);
va_start(ap, string);
for (ep = string; *ep; ep++)
{
if (*ep == '%')
{
switch (*++ep)
{
case 'c':
c = (char) va_arg(ap, int);
fprintf(stderr, "%c", c);
break;
case 's':
cp = va_arg(ap, char *);
fprintf(stderr, "%s", cp);
break;
case 'd':
i = va_arg(ap, int);
fprintf(stderr, "%d", i);
break;
case 't':
tp = va_arg(ap, Token *);
fprintf(stderr, "%.*s", (int)tp->len, tp->t);
break;
case 'r':
trp = va_arg(ap, Tokenrow *);
for (tp = trp->tp; tp < trp->lp && tp->type != NL; tp++)
{
if (tp > trp->tp && tp->wslen)
fputc(' ', stderr);
fprintf(stderr, "%.*s", (int)tp->len, tp->t);
}
break;
default:
fputc(*ep, stderr);
break;
}
}
else
fputc(*ep, stderr);
}
va_end(ap);
fputc('\n', stderr);
if (type == FATAL)
exit(1);
if (type != WARNING)
nerrs = 1;
fflush(stderr);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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