gcc/diagnostic.h

   1 /* Various declarations for language-independent diagnostics subroutines.
   2    Copyright (C) 2000 Free Software Foundation, Inc.
   3    Contributed by Gabriel Dos Reis <gdr@codesourcery.com>
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef __GCC_DIAGNOSTIC_H__
  23 #define __GCC_DIAGNOSTIC_H__
  24
  25 #include "obstack.h"
  26
  27 /*  Forward declarations.  */
  28 typedef struct output_buffer output_buffer;
  29
  30 /* The type of front-end specific hook that formats trees into an
  31    output_buffer.  */
  32 typedef void (*printer_fn) PARAMS ((output_buffer *));
  33
  34 /* The output buffer datatype.  This is best seen as an abstract datatype.  */
  35 struct output_buffer
  36 {
  37   /* Internal data.  These fields should not be accessed directly by
  38      front-ends.  */
  39
  40   /* The obstack where the text is built up.  */
  41   struct obstack obstack;
  42   /* The prefix for each new line.   */
  43   char *prefix;
  44   /* The amount of characters output so far.  */
  45   int line_length;
  46   /* The real upper bound of number of characters per line, taking into
  47      accompt the case of a very very looong prefix.  */
  48   int maximum_length;
  49   /* The ideal upper bound of number of characters per line, as suggested
  50      by front-end. */
  51   int ideal_maximum_length;
  52
  53   /* Public fields.  These are used by front-ends to extract formats and
  54      arguments from the variable argument-list passed to output_format.  */
  55
  56   /* The current char to output.  Updated by front-end (*format_map) when
  57      it is called to report front-end printer for a specified format.  */
  58   const char *cursor;
  59   /* Variable argument-list for formatting.  */
  60   va_list format_args;
  61 };
  62
  63 /* If non-NULL, this function formats data in the BUFFER.
  64    BUFFER->CURSOR points to a format code.  LANG_PRINTER should
  65    call output_add_string (and related functions) to add data to
  66    the BUFFER.  LANG_PRINTER can read arguments from
  67    BUFFER->FORMAT_ARGS using VA_ARG.  If the BUFFER needs
  68    additional characters from the format string, it should advance
  69    the BUFFER->CURSOR as it goes.  When LANG_PRINTER returns,
  70    BUFFER->CURSOR should point to the last character processed.  */
  71
  72 extern printer_fn lang_printer;
  73
  74 /* Prototypes */
  75 void init_output_buffer         PARAMS ((output_buffer *, char *, int));
  76 void output_clear               PARAMS ((output_buffer *));
  77 char *output_get_prefix         PARAMS ((const output_buffer *));
  78 void output_set_prefix          PARAMS ((output_buffer *, char *));
  79 void output_set_maximum_length  PARAMS ((output_buffer *, int));
  80 void output_emit_prefix         PARAMS ((output_buffer *));
  81 void output_add_newline         PARAMS ((output_buffer *));
  82 void output_add_space           PARAMS ((output_buffer *));
  83 int output_space_left           PARAMS ((const output_buffer *));
  84 void output_append              PARAMS ((output_buffer *, const char *,
  85                                          const char *));
  86 void output_add_character       PARAMS ((output_buffer *, int));
  87 void output_add_integer         PARAMS ((output_buffer *, HOST_WIDE_INT));
  88 void output_add_string          PARAMS ((output_buffer *, const char *));
  89 const char *output_finish       PARAMS ((output_buffer *));
  90 void output_flush_on            PARAMS ((output_buffer *, FILE *));
  91 void output_printf              PARAMS ((output_buffer *, const char *,
  92                                          ...)) ATTRIBUTE_PRINTF_2;
  93 void output_format              PARAMS ((output_buffer *, const char *));
  94 int output_is_line_wrapping     PARAMS ((output_buffer *));
  95
  96 #endif /* __GCC_DIAGNOSTIC_H__ */