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errwarn.c
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errwarn.c
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/*
* Error and warning reporting and related functions.
*
* Copyright (C) 2001 Peter Johnson
*
* 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 AUTHOR AND OTHER 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 AUTHOR OR OTHER 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.
*/
#define YASM_LIB_INTERNAL
#include "util.h"
/*@unused@*/ RCSID("$Id$");
#include <ctype.h>
#ifdef STDC_HEADERS
# include <stdarg.h>
#endif
#include "coretype.h"
#include "linemgr.h"
#include "errwarn.h"
#define MSG_MAXSIZE 1024
/* Default handlers for replacable functions */
static /*@exits@*/ void def_internal_error_
(const char *file, unsigned int line, const char *message);
static /*@exits@*/ void def_fatal(const char *message, va_list va);
static const char *def_gettext_hook(const char *msgid);
/* Storage for errwarn's "extern" functions */
/*@exits@*/ void (*yasm_internal_error_)
(const char *file, unsigned int line, const char *message)
= def_internal_error_;
/*@exits@*/ void (*yasm_fatal) (const char *message, va_list va) = def_fatal;
const char * (*yasm_gettext_hook) (const char *msgid) = def_gettext_hook;
/* Enabled warnings. See errwarn.h for a list. */
static unsigned long warn_class_enabled;
/* Total error count */
static unsigned int error_count;
/* Total warning count */
static unsigned int warning_count;
typedef /*@reldef@*/ SLIST_HEAD(errwarndatahead_s, errwarn_data)
errwarndatahead;
static /*@only@*/ /*@null@*/ errwarndatahead errwarns;
typedef struct errwarn_data {
/*@reldef@*/ SLIST_ENTRY(errwarn_data) link;
enum { WE_UNKNOWN, WE_ERROR, WE_WARNING, WE_PARSERERROR } type;
unsigned long line;
unsigned long displine;
/* FIXME: This should not be a fixed size. But we don't have vasprintf()
* right now. */
char msg[MSG_MAXSIZE];
} errwarn_data;
/* Last inserted error/warning. Used to speed up insertions. */
static /*@null@*/ errwarn_data *previous_we;
/* Static buffer for use by conv_unprint(). */
static char unprint[5];
static const char *
def_gettext_hook(const char *msgid)
{
return msgid;
}
void
yasm_errwarn_initialize(void)
{
/* Default enabled warnings. See errwarn.h for a list. */
warn_class_enabled =
(1UL<<YASM_WARN_GENERAL) | (1UL<<YASM_WARN_UNREC_CHAR) |
(1UL<<YASM_WARN_PREPROC) | (0UL<<YASM_WARN_ORPHAN_LABEL);
error_count = 0;
warning_count = 0;
SLIST_INIT(&errwarns);
previous_we = NULL;
}
void
yasm_errwarn_cleanup(void)
{
errwarn_data *we;
/* Delete all error/warnings */
while (!SLIST_EMPTY(&errwarns)) {
we = SLIST_FIRST(&errwarns);
SLIST_REMOVE_HEAD(&errwarns, link);
yasm_xfree(we);
}
}
/* Convert a possibly unprintable character into a printable string, using
* standard cat(1) convention for unprintable characters.
*/
char *
yasm__conv_unprint(int ch)
{
int pos = 0;
if (((ch & ~0x7F) != 0) /*!isascii(ch)*/ && !isprint(ch)) {
unprint[pos++] = 'M';
unprint[pos++] = '-';
ch &= toascii(ch);
}
if (iscntrl(ch)) {
unprint[pos++] = '^';
unprint[pos++] = (ch == '\177') ? '?' : ch | 0100;
} else
unprint[pos++] = ch;
unprint[pos] = '\0';
return unprint;
}
/* Report an internal error. Essentially a fatal error with trace info.
* Exit immediately because it's essentially an assert() trap.
*/
static void
def_internal_error_(const char *file, unsigned int line, const char *message)
{
fprintf(stderr,
yasm_gettext_hook(N_("INTERNAL ERROR at %s, line %u: %s\n")),
file, line, yasm_gettext_hook(message));
#ifdef HAVE_ABORT
abort();
#else
exit(EXIT_FAILURE);
#endif
}
/* Report a fatal error. These are unrecoverable (such as running out of
* memory), so just exit immediately.
*/
static void
def_fatal(const char *fmt, va_list va)
{
fprintf(stderr, "%s: ", yasm_gettext_hook(N_("FATAL")));
vfprintf(stderr, yasm_gettext_hook(fmt), va);
fputc('\n', stderr);
exit(EXIT_FAILURE);
}
/* Create an errwarn structure in the correct linked list location.
* If replace_parser_error is nonzero, overwrites the last error if its
* type is WE_PARSERERROR.
*/
static errwarn_data *
errwarn_data_new(unsigned long line, unsigned long displine,
int replace_parser_error)
{
errwarn_data *first, *next, *ins_we, *we;
enum { INS_NONE, INS_HEAD, INS_AFTER } action = INS_NONE;
/* Find the entry with either line=line or the last one with line<line.
* Start with the last entry added to speed the search.
*/
ins_we = previous_we;
first = SLIST_FIRST(&errwarns);
if (!ins_we || !first)
action = INS_HEAD;
while (action == INS_NONE) {
next = SLIST_NEXT(ins_we, link);
if (line < ins_we->line) {
if (ins_we == first)
action = INS_HEAD;
else
ins_we = first;
} else if (!next)
action = INS_AFTER;
else if (line >= ins_we->line && line < next->line)
action = INS_AFTER;
else
ins_we = next;
}
if (replace_parser_error && ins_we && ins_we->type == WE_PARSERERROR) {
/* overwrite last error */
we = ins_we;
} else {
/* add a new error */
we = yasm_xmalloc(sizeof(errwarn_data));
we->type = WE_UNKNOWN;
we->line = line;
we->displine = displine;
if (action == INS_HEAD)
SLIST_INSERT_HEAD(&errwarns, we, link);
else if (action == INS_AFTER) {
assert(ins_we != NULL);
SLIST_INSERT_AFTER(ins_we, we, link);
} else
yasm_internal_error(N_("Unexpected errwarn insert action"));
}
/* Remember previous err/warn */
previous_we = we;
return we;
}
/* Register an error at line line, displaying line displine. Does not print
* the error, only stores it for output_all() to print.
*/
void
yasm__error_va_at(unsigned long line, unsigned long displine, const char *fmt,
va_list va)
{
errwarn_data *we = errwarn_data_new(line, displine, 1);
we->type = WE_ERROR;
#ifdef HAVE_VSNPRINTF
vsnprintf(we->msg, MSG_MAXSIZE, yasm_gettext_hook(fmt), va);
#else
vsprintf(we->msg, yasm_gettext_hook(fmt), va);
#endif
error_count++;
}
/* Register an warning at line line, displaying line displine. Does not print
* the warning, only stores it for output_all() to print.
*/
void
yasm__warning_va_at(yasm_warn_class num, unsigned long line,
unsigned long displine, const char *fmt, va_list va)
{
errwarn_data *we;
if (!(warn_class_enabled & (1UL<<num)))
return; /* warning is part of disabled class */
we = errwarn_data_new(line, displine, 0);
we->type = WE_WARNING;
#ifdef HAVE_VSNPRINTF
vsnprintf(we->msg, MSG_MAXSIZE, yasm_gettext_hook(fmt), va);
#else
vsprintf(we->msg, yasm_gettext_hook(fmt), va);
#endif
warning_count++;
}
/* Register an error at line line. Does not print the error, only stores it
* for output_all() to print.
*/
void
yasm__error(unsigned long line, const char *fmt, ...)
{
va_list va;
va_start(va, fmt);
yasm__error_va_at(line, line, fmt, va);
va_end(va);
}
/* Register an error at line line, displaying line displine. Does not print
* the error, only stores it for output_all() to print.
*/
void
yasm__error_at(unsigned long line, unsigned long displine, const char *fmt,
...)
{
va_list va;
va_start(va, fmt);
yasm__error_va_at(line, displine, fmt, va);
va_end(va);
}
/* Register an warning at line line. Does not print the warning, only stores
* it for output_all() to print.
*/
void
yasm__warning(yasm_warn_class num, unsigned long line, const char *fmt, ...)
{
va_list va;
va_start(va, fmt);
yasm__warning_va_at(num, line, line, fmt, va);
va_end(va);
}
/* Register an warning at line line, displaying line displine. Does not print
* the warning, only stores it for output_all() to print.
*/
void
yasm__warning_at(yasm_warn_class num, unsigned long line,
unsigned long displine, const char *fmt, ...)
{
va_list va;
va_start(va, fmt);
yasm__warning_va_at(num, line, line, fmt, va);
va_end(va);
}
/* Parser error handler. Moves YACC-style error into our error handling
* system.
*/
void
yasm__parser_error(unsigned long line, const char *s)
{
yasm__error(line, N_("parser error: %s"), s);
previous_we->type = WE_PARSERERROR;
}
void
yasm_warn_enable(yasm_warn_class num)
{
warn_class_enabled |= (1UL<<num);
}
void
yasm_warn_disable(yasm_warn_class num)
{
warn_class_enabled &= ~(1UL<<num);
}
void
yasm_warn_disable_all(void)
{
warn_class_enabled = 0;
}
unsigned int
yasm_get_num_errors(int warning_as_error)
{
if (warning_as_error)
return error_count+warning_count;
else
return error_count;
}
void
yasm_errwarn_output_all(yasm_linemap *lm, int warning_as_error,
yasm_print_error_func print_error, yasm_print_warning_func print_warning)
{
errwarn_data *we;
const char *filename;
unsigned long line;
/* If we're treating warnings as errors, tell the user about it. */
if (warning_as_error && warning_as_error != 2) {
print_error("", 0,
yasm_gettext_hook(N_("warnings being treated as errors")));
warning_as_error = 2;
}
/* Output error/warnings. */
SLIST_FOREACH(we, &errwarns, link) {
/* Output error/warning */
yasm_linemap_lookup(lm, we->displine, &filename, &line);
if (we->type == WE_ERROR)
print_error(filename, line, we->msg);
else
print_warning(filename, line, we->msg);
}
}
void
yasm__fatal(const char *message, ...)
{
va_list va;
va_start(va, message);
yasm_fatal(message, va);
/*@notreached@*/
va_end(va);
}