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/* Various declarations for language-independent diagnostics subroutines.
Copyright (C) 2000, 2001 Free Software Foundation, Inc.
Contributed by Gabriel Dos Reis <gdr@codesourcery.com>
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef __GCC_DIAGNOSTIC_H__
#define __GCC_DIAGNOSTIC_H__
#include "obstack.h"
/* Forward declarations. */
typedef struct output_buffer output_buffer;
typedef struct diagnostic_context diagnostic_context;
typedef void (*diagnostic_starter_fn) PARAMS ((output_buffer *,
diagnostic_context *));
typedef diagnostic_starter_fn diagnostic_finalizer_fn;
#define DIAGNOSTICS_SHOW_PREFIX_ONCE 0x0
#define DIAGNOSTICS_SHOW_PREFIX_NEVER 0x1
#define DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE 0x2
/* The type of front-end specific hook that formats trees into an
output_buffer. A language specific printer returns a truth value if
everything goes well. */
typedef int (*printer_fn) PARAMS ((output_buffer *));
/* This data structure encapsulates an output_buffer's state. */
typedef struct
{
/* The prefix for each new line. */
const char *prefix;
/* The real upper bound of number of characters per line, taking into
account the case of a very very looong prefix. */
int maximum_length;
/* The ideal upper bound of number of characters per line, as suggested
by front-end. */
int ideal_maximum_length;
/* Indentation count. */
int indent_skip;
/* Nonzero if current PREFIX was emitted at least once. */
int emitted_prefix_p;
/* Nonzero means one should emit a newline before outputing anything. */
int need_newline_p;
/* Tells how often current PREFIX should be emitted:
o DIAGNOSTICS_SHOW_PREFIX_NEVER: never - not yet supported;
o DIAGNOSTICS_SHOW_PREFIX_ONCE: emit current PREFIX only once;
o DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE: emit current PREFIX each time
a physical line is started. */
int prefixing_rule;
/* The current char to output. Updated by front-end (*format_map) when
it is called to report front-end printer for a specified format. */
const char *cursor;
/* A pointer to the variable argument-list for formatting. */
va_list *format_args;
} output_state;
/* The output buffer datatype. This is best seen as an abstract datatype. */
struct output_buffer
{
/* Internal data. These fields should not be accessed directly by
front-ends. */
/* Where to output formatted text. */
FILE* stream;
/* The obstack where the text is built up. */
struct obstack obstack;
/* The amount of characters output so far. */
int line_length;
/* The current state of the buffer. */
output_state state;
};
#define output_buffer_attached_stream(BUFFER) (BUFFER)->stream
#define output_buffer_text_cursor(BUFFER) (BUFFER)->state.cursor
#define output_buffer_format_args(BUFFER) *((BUFFER)->state.format_args)
#define output_needs_newline(BUFFER) (BUFFER)->state.need_newline_p
#define output_buffer_state(BUFFER) (BUFFER)->state
#define output_indentation(BUFFER) (BUFFER)->state.indent_skip
#define output_message_text(BUFFER) \
((const char *) obstack_base (&(BUFFER)->obstack))
/* This data structure bundles altogether any information relevant to
the context of a diagnostic message. */
struct diagnostic_context
{
/* The diagnostic message to output. */
const char *message;
/* A pointer to a variable list of the arguments necessary for the
purpose of message formatting. */
va_list *args_ptr;
/* The name of the source file involved in the diiagnostic. */
const char *file;
/* The line-location in the source file. */
int line;
/* Is this message a warning? */
int warn;
/* This function is called before any message is printed out. It is
responsible for preparing message prefix and such. For example, it
might say:
In file included from "/usr/local/include/curses.h:5:
from "/home/gdr/src/nifty_printer.h:56:
...
*/
void (*begin_diagnostic) PARAMS ((output_buffer *, diagnostic_context *));
/* This function is called after the diagnostic message is printed. */
void (*end_diagnostic) PARAMS ((output_buffer *, diagnostic_context *));
/* Hook for front-end extensions. */
void *x_data;
};
#define diagnostic_message(DC) (DC)->message
#define diagnostic_argument_list(DC) (DC)->args_ptr
#define diagnostic_file_location(DC) (DC)->file
#define diagnostic_line_location(DC) (DC)->line
#define diagnostic_is_warning(DC) (DC)->warn
#define diagnostic_starter(DC) (DC)->begin_diagnostic
#define diagnostic_finalizer(DC) (DC)->end_diagnostic
#define diagnostic_auxiliary_data(DC) (DC)->x_data
/* If non-NULL, this function formats data in the BUFFER. When called,
output_buffer_text_cursor (BUFFER) points to a format code. LANG_PRINTER
should call output_add_string (and related functions) to add data to
the BUFFER. LANG_PRINTER can read arguments from
output_buffer_format_args (BUFFER) using VA_ARG. If the BUFFER needs
additional characters from the format string, it should advance
the output_buffer_text_cursor (BUFFER) as it goes. When LANG_PRINTER
returns, output_buffer_text_cursor (BUFFER) should point to the last
character processed. */
extern printer_fn lang_printer;
extern diagnostic_starter_fn lang_diagnostic_starter;
extern diagnostic_finalizer_fn lang_diagnostic_finalizer;
extern int diagnostic_message_length_per_line;
/* This output buffer is used by front-ends that directly output
diagnostic messages without going through `error', `warning',
and similar functions. In general, such usage should be
avoided. This global buffer will go away, once all such usage
has been removed. */
extern output_buffer *diagnostic_buffer;
/* Prototypes */
extern void set_diagnostic_context PARAMS ((diagnostic_context *,
const char *, va_list *,
const char *, int, int));
extern void set_internal_error_function PARAMS ((void (*)
PARAMS ((const char *,
va_list *))));
extern void report_diagnostic PARAMS ((diagnostic_context *));
extern void initialize_diagnostics PARAMS ((void));
extern void reshape_diagnostic_buffer PARAMS ((void));
extern void default_initialize_buffer PARAMS ((output_buffer *));
extern void init_output_buffer PARAMS ((output_buffer *,
const char *, int));
extern void flush_diagnostic_buffer PARAMS ((void));
extern void output_clear PARAMS ((output_buffer *));
extern const char *output_get_prefix PARAMS ((const output_buffer *));
extern const char *output_last_position PARAMS ((const output_buffer *));
extern void output_set_prefix PARAMS ((output_buffer *,
const char *));
extern void output_destroy_prefix PARAMS ((output_buffer *));
extern void output_set_maximum_length PARAMS ((output_buffer *, int));
extern void output_emit_prefix PARAMS ((output_buffer *));
extern void output_add_newline PARAMS ((output_buffer *));
extern void output_add_space PARAMS ((output_buffer *));
extern int output_space_left PARAMS ((const output_buffer *));
extern void output_append PARAMS ((output_buffer *, const char *,
const char *));
extern void output_add_character PARAMS ((output_buffer *, int));
extern void output_decimal PARAMS ((output_buffer *, int));
extern void output_add_string PARAMS ((output_buffer *,
const char *));
extern const char *output_finalize_message PARAMS ((output_buffer *));
extern void output_clear_message_text PARAMS ((output_buffer *));
extern void output_printf PARAMS ((output_buffer *, const char *,
...)) ATTRIBUTE_PRINTF_2;
extern int output_is_line_wrapping PARAMS ((output_buffer *));
extern void set_message_prefixing_rule PARAMS ((int));
extern void output_verbatim PARAMS ((output_buffer *, const char *,
...)) ATTRIBUTE_PRINTF_2;
extern void verbatim PARAMS ((const char *, ...))
ATTRIBUTE_PRINTF_1;
extern char *context_as_prefix PARAMS ((const char *, int, int));
extern char *file_name_as_prefix PARAMS ((const char *));
extern int error_module_changed PARAMS ((void));
extern void record_last_error_module PARAMS ((void));
extern int error_function_changed PARAMS ((void));
extern void record_last_error_function PARAMS ((void));
extern void report_problematic_module PARAMS ((output_buffer *));
#endif /* __GCC_DIAGNOSTIC_H__ */
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