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freebsd-src/contrib/gcc/diagnostic.h
David E. O'Brien 1952e2e1c1 Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 
These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00

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/* Various declarations for language-independent diagnostics subroutines.
Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
Contributed by Gabriel Dos Reis <gdr@codesourcery.com>
This file is part of GCC.
GCC 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.
GCC 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 GCC; 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;
typedef enum
{
#define DEFINE_DIAGNOSTIC_KIND(K, M) K,
#include "diagnostic.def"
#undef DEFINE_DIAGNOSTIC_KIND
DK_LAST_DIAGNOSTIC_KIND
} diagnostic_t;
#define pedantic_error_kind() (flag_pedantic_errors ? DK_ERROR : DK_WARNING)
/* How often diagnostics are prefixed by their locations:
o DIAGNOSTICS_SHOW_PREFIX_NEVER: never - not yet supported;
o DIAGNOSTICS_SHOW_PREFIX_ONCE: emit only once;
o DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE: emit each time a physical
line is started. */
typedef enum
{
DIAGNOSTICS_SHOW_PREFIX_ONCE = 0x0,
DIAGNOSTICS_SHOW_PREFIX_NEVER = 0x1,
DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE = 0x2
} diagnostic_prefixing_rule_t;
/* 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. */
bool emitted_prefix_p;
/* Nonzero means one should emit a newline before outputing anything. */
bool need_newline_p;
/* Current prefixing rule. */
diagnostic_prefixing_rule_t 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;
/* The number of times we have issued diagnostics. */
int diagnostic_count[DK_LAST_DIAGNOSTIC_KIND];
} 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. */
/* The current state of the buffer. */
output_state state;
/* 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;
/* This must be large enough to hold any printed integer or
floating-point value. */
char digit_buffer[128];
/* If non-NULL, this function formats data in the BUFFER. When called,
output_buffer_text_cursor (BUFFER) points to a format code.
FORMAT_DECODER should call output_add_string (and related functions)
to add data to the BUFFER. FORMAT_DECODER 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 FORMAT_DECODER
returns, output_buffer_text_cursor (BUFFER) should point to the last
character processed. */
printer_fn format_decoder;
};
/* Current state of the diagnostic_context' output_buffer. This macro
accepts both `diagnostic_context *' and `output_buffer *'. */
#define output_buffer_state(BUFFER) ((output_buffer *)(BUFFER))->state
/* The stream attached to the output_buffer, where the formatted
diagnostics will ultimately go. Works only on `output_buffer *'. */
#define output_buffer_attached_stream(BUFFER) (BUFFER)->stream
/* This points to the beginning of the rest of the diagnostic message
to be formatted. Accepts only `output_buffer *'s. */
#define output_buffer_text_cursor(BUFFER) (BUFFER)->state.cursor
/* The rest of the `variable argument list' not yet processed.
This macro works on both `output_state *' and `output_buffer *'. */
#define output_buffer_format_args(BUFFER) \
*(((output_state *)(BUFFER))->format_args)
/* In line-wrapping mode, whether we should start a new line. */
#define output_needs_newline(BUFFER) (BUFFER)->state.need_newline_p
/* The amount of whitespace to be emitted when starting a new line. */
#define output_indentation(BUFFER) (BUFFER)->state.indent_skip
/* A pointer to the formatted diagonstic message. */
#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
{
/* Where most of the diagnostic formatting work is done. In Object
Oriented terms, we'll say that diagnostic_context is a sub-class of
output_buffer. */
output_buffer buffer;
/* 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;
};
/* The diagnostic message being formatted. */
#define diagnostic_message(DC) (DC)->message
/* A pointer to the variable argument list used in a call
to a diagonstic routine. */
#define diagnostic_argument_list(DC) (DC)->args_ptr
/* The program file to which the diagnostic is referring to. */
#define diagnostic_file_location(DC) (DC)->file
/* The program source line referred to in the diagnostic message. */
#define diagnostic_line_location(DC) (DC)->line
/* Tell whether the diagnostic message is to be treated as a warning. */
#define diagnostic_is_warning(DC) (DC)->warn
/* Client supplied function to announce a diagnostic. */
#define diagnostic_starter(DC) (DC)->begin_diagnostic
/* Client supplied function called after a diagnostic message is
displayed. */
#define diagnostic_finalizer(DC) (DC)->end_diagnostic
/* Extension hook for client. */
#define diagnostic_auxiliary_data(DC) (DC)->x_data
/* Client supplied function used to decode formats. Can operate on both
`output_buffer *' and `diagnostic_context *'. */
#define diagnostic_format_decoder(DC) ((output_buffer *)(DC))->format_decoder
/* Prefixing rule used in formatting a diagnostic message. Accepts both
`output_buffer *' and `diagnostic_context *'. */
#define diagnostic_prefixing_rule(DC) \
((output_buffer *)(DC))->state.prefixing_rule
/* Maximum characters per line in automatic line wrapping mode.
Zero means don't wrap lines. */
#define diagnostic_line_cutoff(DC) \
((output_buffer *)(DC))->state.ideal_maximum_length
/* This diagnostic context is used by front-ends that directly output
diagnostic messages without going through `error', `warning',
and similar functions. */
extern diagnostic_context *global_dc;
/* This will be removed shortly. */
extern output_buffer *diagnostic_buffer;
/* The total count of a KIND of diagnostics meitted so far. */
#define diagnostic_kind_count(DC, DK) \
((output_buffer *)(DC))->state.diagnostic_count[(int) (DK)]
/* The number of errors that have been issued so far. Ideally, these
would take an output_buffer as an argument. */
#define errorcount diagnostic_kind_count (global_dc, DK_ERROR)
/* Similarly, but for warnings. */
#define warningcount diagnostic_kind_count (global_dc, DK_WARNING)
/* Similarly, but for sorrys. */
#define sorrycount diagnostic_kind_count (global_dc, DK_SORRY)
/* Returns non-zero if warnings should be emitted. */
#define diagnostic_report_warnings_p() \
(!inhibit_warnings \
&& !(in_system_header && !warn_system_headers))
/* 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 diagnostic_initialize PARAMS ((diagnostic_context *));
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 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 *));
/* Called by report_error_function to print out function name.
* Default may be overridden by language front-ends. */
extern void (*print_error_function) PARAMS ((diagnostic_context *,
const char *));
extern void default_print_error_function PARAMS ((diagnostic_context *,
const char *));
#endif /* ! GCC_DIAGNOSTIC_H */
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