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/* $OpenBSD: trace.c,v 1.16 2010/09/07 19:58:09 marco Exp $ */
/*
* Copyright (c) 2001 Marc Espie.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
* PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <err.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include "mdef.h"
#include "stdd.h"
#include "extern.h"
FILE *traceout;
#define TRACE_ARGS 1
#define TRACE_EXPANSION 2
#define TRACE_QUOTE 4
#define TRACE_FILENAME 8
#define TRACE_LINENO 16
#define TRACE_CONT 32
#define TRACE_ID 64
#define TRACE_NEWFILE 128 /* not implemented yet */
#define TRACE_INPUT 256 /* not implemented yet */
static unsigned int letter_to_flag(int);
static void print_header(struct input_file *);
static int frame_level(void);
unsigned int trace_flags = TRACE_QUOTE | TRACE_EXPANSION;
void
trace_file(const char *name)
{
if (traceout && traceout != stderr)
fclose(traceout);
traceout = fopen(name, "w");
if (!traceout)
err(1, "can't open %s", name);
}
static unsigned int
letter_to_flag(int c)
{
switch(c) {
case 'a':
return TRACE_ARGS;
case 'e':
return TRACE_EXPANSION;
case 'q':
return TRACE_QUOTE;
case 'c':
return TRACE_CONT;
case 'x':
return TRACE_ID;
case 'f':
return TRACE_FILENAME;
case 'l':
return TRACE_LINENO;
case 'p':
return TRACE_NEWFILE;
case 'i':
return TRACE_INPUT;
case 't':
return TRACE_ALL;
case 'V':
return ~0;
default:
return 0;
}
}
void
set_trace_flags(const char *s)
{
char mode = 0;
unsigned int f = 0;
if (*s == '+' || *s == '-')
mode = *s++;
while (*s)
f |= letter_to_flag(*s++);
switch(mode) {
case 0:
trace_flags = f;
break;
case '+':
trace_flags |= f;
break;
case '-':
trace_flags &= ~f;
break;
}
}
static int
frame_level()
{
int level;
int framep;
for (framep = fp, level = 0; framep != 0;
level++,framep = mstack[framep-3].sfra)
;
return level;
}
static void
print_header(struct input_file *inp)
{
fprintf(traceout, "m4trace:");
if (trace_flags & TRACE_FILENAME)
fprintf(traceout, "%s:", inp->name);
if (trace_flags & TRACE_LINENO)
fprintf(traceout, "%lu:", inp->lineno);
fprintf(traceout, " -%d- ", frame_level());
if (trace_flags & TRACE_ID)
fprintf(traceout, "id %lu: ", expansion_id);
}
size_t
trace(const char *argv[], int argc, struct input_file *inp)
{
if (!traceout)
traceout = stderr;
print_header(inp);
if (trace_flags & TRACE_CONT) {
fprintf(traceout, "%s ...\n", argv[1]);
print_header(inp);
}
fprintf(traceout, "%s", argv[1]);
if ((trace_flags & TRACE_ARGS) && argc > 2) {
char delim[3];
int i;
delim[0] = LPAREN;
delim[1] = EOS;
for (i = 2; i < argc; i++) {
fprintf(traceout, "%s%s%s%s", delim,
(trace_flags & TRACE_QUOTE) ? lquote : "",
argv[i],
(trace_flags & TRACE_QUOTE) ? rquote : "");
delim[0] = COMMA;
delim[1] = ' ';
delim[2] = EOS;
}
fprintf(traceout, "%c", RPAREN);
}
if (trace_flags & TRACE_CONT) {
fprintf(traceout, " -> ???\n");
print_header(inp);
fprintf(traceout, argc > 2 ? "%s(...)" : "%s", argv[1]);
}
if (trace_flags & TRACE_EXPANSION)
return buffer_mark();
else {
fprintf(traceout, "\n");
return SIZE_MAX;
}
}
void
finish_trace(size_t mark)
{
fprintf(traceout, " -> ");
if (trace_flags & TRACE_QUOTE)
fprintf(traceout, "%s", lquote);
dump_buffer(traceout, mark);
if (trace_flags & TRACE_QUOTE)
fprintf(traceout, "%s", rquote);
fprintf(traceout, "\n");
}
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