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/* Various declarations for language-independent pretty-print subroutines.
Copyright (C) 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
Contributed by Gabriel Dos Reis <>
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 3, or (at your option) any later
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<>. */
#include "obstack.h"
#include "input.h"
/* Maximum number of format string arguments. */
#define PP_NL_ARGMAX 30
/* The type of a text to be formatted according a format specification
along with a list of things. */
typedef struct
const char *format_spec;
va_list *args_ptr;
int err_no; /* for %m */
location_t *locus;
tree *abstract_origin;
} text_info;
/* How often diagnostics are prefixed by their locations:
o DIAGNOSTICS_SHOW_PREFIX_NEVER: never - not yet supported;
o DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE: emit each time a physical
line is started. */
typedef enum
} diagnostic_prefixing_rule_t;
/* The chunk_info data structure forms a stack of the results from the
first phase of formatting (pp_base_format) which have not yet been
output (pp_base_output_formatted_text). A stack is necessary because
the diagnostic starter may decide to generate its own output by way
of the formatter. */
struct chunk_info
/* Pointer to previous chunk on the stack. */
struct chunk_info *prev;
/* Array of chunks to output. Each chunk is a NUL-terminated string.
In the first phase of formatting, even-numbered chunks are
to be output verbatim, odd-numbered chunks are format specifiers.
The second phase replaces all odd-numbered chunks with formatted
text, and the third phase simply emits all the chunks in sequence
with appropriate line-wrapping. */
const char *args[PP_NL_ARGMAX * 2];
/* The output buffer datatype. This is best seen as an abstract datatype
whose fields should not be accessed directly by clients. */
typedef struct
/* Obstack where the text is built up. */
struct obstack formatted_obstack;
/* Obstack containing a chunked representation of the format
specification plus arguments. */
struct obstack chunk_obstack;
/* Currently active obstack: one of the above two. This is used so
that the text formatters don't need to know which phase we're in. */
struct obstack *obstack;
/* Stack of chunk arrays. These come from the chunk_obstack. */
struct chunk_info *cur_chunk_array;
/* Where to output formatted text. */
FILE *stream;
/* 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];
} output_buffer;
/* The type of pretty-printer flags passed to clients. */
typedef unsigned int pp_flags;
typedef enum
pp_none, pp_before, pp_after
} pp_padding;
/* Structure for switching in and out of verbatim mode in a convenient
manner. */
typedef struct
/* Current prefixing rule. */
diagnostic_prefixing_rule_t rule;
/* The ideal upper bound of number of characters per line, as suggested
by front-end. */
int line_cutoff;
} pp_wrapping_mode_t;
/* Maximum characters per line in automatic line wrapping mode.
Zero means don't wrap lines. */
#define pp_line_cutoff(PP) pp_base (PP)->wrapping.line_cutoff
/* Prefixing rule used in formatting a diagnostic message. */
#define pp_prefixing_rule(PP) pp_base (PP)->wrapping.rule
/* Get or set the wrapping mode as a single entity. */
#define pp_wrapping_mode(PP) pp_base (PP)->wrapping
/* The type of a hook that formats client-specific data onto a pretty_pinter.
A client-supplied formatter returns true if everything goes well,
otherwise it returns false. */
typedef struct pretty_print_info pretty_printer;
typedef bool (*printer_fn) (pretty_printer *, text_info *, const char *,
int, bool, bool, bool);
/* Client supplied function used to decode formats. */
#define pp_format_decoder(PP) pp_base (PP)->format_decoder
/* TRUE if a newline character needs to be added before further
formatting. */
#define pp_needs_newline(PP) pp_base (PP)->need_newline
/* True if PRETTY-PRINTER is in line-wrapping mode. */
#define pp_is_wrapping_line(PP) (pp_line_cutoff (PP) > 0)
/* The amount of whitespace to be emitted when starting a new line. */
#define pp_indentation(PP) pp_base (PP)->indent_skip
/* The data structure that contains the bare minimum required to do
proper pretty-printing. Clients may derived from this structure
and add additional fields they need. */
struct pretty_print_info
/* Where we print external representation of ENTITY. */
output_buffer *buffer;
/* The prefix for each new line. */
const char *prefix;
/* Where to put whitespace around the entity being formatted. */
pp_padding padding;
/* The real upper bound of number of characters per line, taking into
account the case of a very very looong prefix. */
int maximum_length;
/* Indentation count. */
int indent_skip;
/* Current wrapping mode. */
pp_wrapping_mode_t wrapping;
/* If non-NULL, this function formats a TEXT into the BUFFER. When called,
TEXT->format_spec points to a format code. FORMAT_DECODER should call
pp_string (and related functions) to add data to the BUFFER.
FORMAT_DECODER can read arguments from *TEXT->args_pts using VA_ARG.
If the BUFFER needs additional characters from the format string, it
should advance the TEXT->format_spec as it goes. When FORMAT_DECODER
returns, TEXT->format_spec should point to the last character processed.
printer_fn format_decoder;
/* Nonzero if current PREFIX was emitted at least once. */
bool emitted_prefix;
/* Nonzero means one should emit a newline before outputting anything. */
bool need_newline;
#define pp_set_line_maximum_length(PP, L) \
pp_base_set_line_maximum_length (pp_base (PP), L)
#define pp_set_prefix(PP, P) pp_base_set_prefix (pp_base (PP), P)
#define pp_destroy_prefix(PP) pp_base_destroy_prefix (pp_base (PP))
#define pp_remaining_character_count_for_line(PP) \
pp_base_remaining_character_count_for_line (pp_base (PP))
#define pp_clear_output_area(PP) \
pp_base_clear_output_area (pp_base (PP))
#define pp_formatted_text(PP) pp_base_formatted_text (pp_base (PP))
#define pp_last_position_in_text(PP) \
pp_base_last_position_in_text (pp_base (PP))
#define pp_emit_prefix(PP) pp_base_emit_prefix (pp_base (PP))
#define pp_append_text(PP, B, E) \
pp_base_append_text (pp_base (PP), B, E)
#define pp_flush(PP) pp_base_flush (pp_base (PP))
#define pp_format(PP, TI) pp_base_format (pp_base (PP), TI)
#define pp_output_formatted_text(PP) \
pp_base_output_formatted_text (pp_base (PP))
#define pp_format_verbatim(PP, TI) \
pp_base_format_verbatim (pp_base (PP), TI)
#define pp_character(PP, C) pp_base_character (pp_base (PP), C)
#define pp_string(PP, S) pp_base_string (pp_base (PP), S)
#define pp_newline(PP) pp_base_newline (pp_base (PP))
#define pp_space(PP) pp_character (PP, ' ')
#define pp_left_paren(PP) pp_character (PP, '(')
#define pp_right_paren(PP) pp_character (PP, ')')
#define pp_left_bracket(PP) pp_character (PP, '[')
#define pp_right_bracket(PP) pp_character (PP, ']')
#define pp_left_brace(PP) pp_character (PP, '{')
#define pp_right_brace(PP) pp_character (PP, '}')
#define pp_semicolon(PP) pp_character (PP, ';')
#define pp_comma(PP) pp_string (PP, ", ")
#define pp_dot(PP) pp_character (PP, '.')
#define pp_colon(PP) pp_character (PP, ':')
#define pp_colon_colon(PP) pp_string (PP, "::")
#define pp_arrow(PP) pp_string (PP, "->")
#define pp_equal(PP) pp_character (PP, '=')
#define pp_question(PP) pp_character (PP, '?')
#define pp_bar(PP) pp_character (PP, '|')
#define pp_carret(PP) pp_character (PP, '^')
#define pp_ampersand(PP) pp_character (PP, '&')
#define pp_less(PP) pp_character (PP, '<')
#define pp_greater(PP) pp_character (PP, '>')
#define pp_plus(PP) pp_character (PP, '+')
#define pp_minus(PP) pp_character (PP, '-')
#define pp_star(PP) pp_character (PP, '*')
#define pp_slash(PP) pp_character (PP, '/')
#define pp_modulo(PP) pp_character (PP, '%')
#define pp_exclamation(PP) pp_character (PP, '!')
#define pp_complement(PP) pp_character (PP, '~')
#define pp_quote(PP) pp_character (PP, '\'')
#define pp_backquote(PP) pp_character (PP, '`')
#define pp_doublequote(PP) pp_character (PP, '"')
#define pp_newline_and_indent(PP, N) \
do { \
pp_indentation (PP) += N; \
pp_newline (PP); \
pp_base_indent (pp_base (PP)); \
pp_needs_newline (PP) = false; \
} while (0)
#define pp_maybe_newline_and_indent(PP, N) \
if (pp_needs_newline (PP)) pp_newline_and_indent (PP, N)
#define pp_maybe_space(PP) pp_base_maybe_space (pp_base (PP))
#define pp_separate_with(PP, C) \
do { \
pp_character (PP, C); \
pp_space (PP); \
} while (0)
#define pp_scalar(PP, FORMAT, SCALAR) \
do \
{ \
sprintf (pp_buffer (PP)->digit_buffer, FORMAT, SCALAR); \
pp_string (PP, pp_buffer (PP)->digit_buffer); \
} \
while (0)
#define pp_decimal_int(PP, I) pp_scalar (PP, "%d", I)
#define pp_wide_integer(PP, I) \
#define pp_widest_integer(PP, I) \
#define pp_pointer(PP, P) pp_scalar (PP, "%p", P)
#define pp_identifier(PP, ID) pp_string (PP, ID)
#define pp_tree_identifier(PP, T) \
pp_append_text(PP, IDENTIFIER_POINTER (T), \
#define pp_unsupported_tree(PP, T) \
pp_verbatim (pp_base (PP), "#%qs not supported by %s#", \
tree_code_name[(int) TREE_CODE (T)], __FUNCTION__)
#define pp_buffer(PP) pp_base (PP)->buffer
/* Clients that directly derive from pretty_printer need to override
this macro to return a pointer to the base pretty_printer structure. */
#define pp_base(PP) (PP)
extern void pp_construct (pretty_printer *, const char *, int);
extern void pp_base_set_line_maximum_length (pretty_printer *, int);
extern void pp_base_set_prefix (pretty_printer *, const char *);
extern void pp_base_destroy_prefix (pretty_printer *);
extern int pp_base_remaining_character_count_for_line (pretty_printer *);
extern void pp_base_clear_output_area (pretty_printer *);
extern const char *pp_base_formatted_text (pretty_printer *);
extern const char *pp_base_last_position_in_text (const pretty_printer *);
extern void pp_base_emit_prefix (pretty_printer *);
extern void pp_base_append_text (pretty_printer *, const char *, const char *);
/* This header may be included before toplev.h, hence the duplicate
definitions to allow for GCC-specific formats. */
#if GCC_VERSION >= 3005
#define ATTRIBUTE_GCC_PPDIAG(m, n) __attribute__ ((__format__ (__gcc_diag__, m ,n))) ATTRIBUTE_NONNULL(m)
extern void pp_printf (pretty_printer *, const char *, ...)
extern void pp_verbatim (pretty_printer *, const char *, ...)
extern void pp_base_flush (pretty_printer *);
extern void pp_base_format (pretty_printer *, text_info *);
extern void pp_base_output_formatted_text (pretty_printer *);
extern void pp_base_format_verbatim (pretty_printer *, text_info *);
extern void pp_base_indent (pretty_printer *);
extern void pp_base_newline (pretty_printer *);
extern void pp_base_character (pretty_printer *, int);
extern void pp_base_string (pretty_printer *, const char *);
extern void pp_write_text_to_stream (pretty_printer *pp);
extern void pp_base_maybe_space (pretty_printer *);
/* Switch into verbatim mode and return the old mode. */
static inline pp_wrapping_mode_t
pp_set_verbatim_wrapping_ (pretty_printer *pp)
pp_wrapping_mode_t oldmode = pp_wrapping_mode (pp);
pp_line_cutoff (pp) = 0;
pp_prefixing_rule (pp) = DIAGNOSTICS_SHOW_PREFIX_NEVER;
return oldmode;
#define pp_set_verbatim_wrapping(PP) pp_set_verbatim_wrapping_ (pp_base (PP))
#endif /* GCC_PRETTY_PRINT_H */
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