1 /* Various declarations for language-independent pretty-print subroutines. 2 Copyright (C) 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc. 3 Contributed by Gabriel Dos Reis <gdr (at) integrable-solutions.net> 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 3, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 #ifndef GCC_PRETTY_PRINT_H 22 #define GCC_PRETTY_PRINT_H 23 24 #include "obstack.h" 25 #include "input.h" 26 27 /* Maximum number of format string arguments. */ 28 #define PP_NL_ARGMAX 30 29 30 /* The type of a text to be formatted according a format specification 31 along with a list of things. */ 32 typedef struct 33 { 34 const char *format_spec; 35 va_list *args_ptr; 36 int err_no; /* for %m */ 37 location_t *locus; 38 tree *abstract_origin; 39 } text_info; 40 41 /* How often diagnostics are prefixed by their locations: 42 o DIAGNOSTICS_SHOW_PREFIX_NEVER: never - not yet supported; 43 o DIAGNOSTICS_SHOW_PREFIX_ONCE: emit only once; 44 o DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE: emit each time a physical 45 line is started. */ 46 typedef enum 47 { 48 DIAGNOSTICS_SHOW_PREFIX_ONCE = 0x0, 49 DIAGNOSTICS_SHOW_PREFIX_NEVER = 0x1, 50 DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE = 0x2 51 } diagnostic_prefixing_rule_t; 52 53 /* The chunk_info data structure forms a stack of the results from the 54 first phase of formatting (pp_base_format) which have not yet been 55 output (pp_base_output_formatted_text). A stack is necessary because 56 the diagnostic starter may decide to generate its own output by way 57 of the formatter. */ 58 struct chunk_info 59 { 60 /* Pointer to previous chunk on the stack. */ 61 struct chunk_info *prev; 62 63 /* Array of chunks to output. Each chunk is a NUL-terminated string. 64 In the first phase of formatting, even-numbered chunks are 65 to be output verbatim, odd-numbered chunks are format specifiers. 66 The second phase replaces all odd-numbered chunks with formatted 67 text, and the third phase simply emits all the chunks in sequence 68 with appropriate line-wrapping. */ 69 const char *args[PP_NL_ARGMAX * 2]; 70 }; 71 72 /* The output buffer datatype. This is best seen as an abstract datatype 73 whose fields should not be accessed directly by clients. */ 74 typedef struct 75 { 76 /* Obstack where the text is built up. */ 77 struct obstack formatted_obstack; 78 79 /* Obstack containing a chunked representation of the format 80 specification plus arguments. */ 81 struct obstack chunk_obstack; 82 83 /* Currently active obstack: one of the above two. This is used so 84 that the text formatters don't need to know which phase we're in. */ 85 struct obstack *obstack; 86 87 /* Stack of chunk arrays. These come from the chunk_obstack. */ 88 struct chunk_info *cur_chunk_array; 89 90 /* Where to output formatted text. */ 91 FILE *stream; 92 93 /* The amount of characters output so far. */ 94 int line_length; 95 96 /* This must be large enough to hold any printed integer or 97 floating-point value. */ 98 char digit_buffer[128]; 99 } output_buffer; 100 101 /* The type of pretty-printer flags passed to clients. */ 102 typedef unsigned int pp_flags; 103 104 typedef enum 105 { 106 pp_none, pp_before, pp_after 107 } pp_padding; 108 109 /* Structure for switching in and out of verbatim mode in a convenient 110 manner. */ 111 typedef struct 112 { 113 /* Current prefixing rule. */ 114 diagnostic_prefixing_rule_t rule; 115 116 /* The ideal upper bound of number of characters per line, as suggested 117 by front-end. */ 118 int line_cutoff; 119 } pp_wrapping_mode_t; 120 121 /* Maximum characters per line in automatic line wrapping mode. 122 Zero means don't wrap lines. */ 123 #define pp_line_cutoff(PP) pp_base (PP)->wrapping.line_cutoff 124 125 /* Prefixing rule used in formatting a diagnostic message. */ 126 #define pp_prefixing_rule(PP) pp_base (PP)->wrapping.rule 127 128 /* Get or set the wrapping mode as a single entity. */ 129 #define pp_wrapping_mode(PP) pp_base (PP)->wrapping 130 131 /* The type of a hook that formats client-specific data onto a pretty_pinter. 132 A client-supplied formatter returns true if everything goes well, 133 otherwise it returns false. */ 134 typedef struct pretty_print_info pretty_printer; 135 typedef bool (*printer_fn) (pretty_printer *, text_info *, const char *, 136 int, bool, bool, bool); 137 138 /* Client supplied function used to decode formats. */ 139 #define pp_format_decoder(PP) pp_base (PP)->format_decoder 140 141 /* TRUE if a newline character needs to be added before further 142 formatting. */ 143 #define pp_needs_newline(PP) pp_base (PP)->need_newline 144 145 /* True if PRETTY-PRINTER is in line-wrapping mode. */ 146 #define pp_is_wrapping_line(PP) (pp_line_cutoff (PP) > 0) 147 148 /* The amount of whitespace to be emitted when starting a new line. */ 149 #define pp_indentation(PP) pp_base (PP)->indent_skip 150 151 /* The data structure that contains the bare minimum required to do 152 proper pretty-printing. Clients may derived from this structure 153 and add additional fields they need. */ 154 struct pretty_print_info 155 { 156 /* Where we print external representation of ENTITY. */ 157 output_buffer *buffer; 158 159 /* The prefix for each new line. */ 160 const char *prefix; 161 162 /* Where to put whitespace around the entity being formatted. */ 163 pp_padding padding; 164 165 /* The real upper bound of number of characters per line, taking into 166 account the case of a very very looong prefix. */ 167 int maximum_length; 168 169 /* Indentation count. */ 170 int indent_skip; 171 172 /* Current wrapping mode. */ 173 pp_wrapping_mode_t wrapping; 174 175 /* If non-NULL, this function formats a TEXT into the BUFFER. When called, 176 TEXT->format_spec points to a format code. FORMAT_DECODER should call 177 pp_string (and related functions) to add data to the BUFFER. 178 FORMAT_DECODER can read arguments from *TEXT->args_pts using VA_ARG. 179 If the BUFFER needs additional characters from the format string, it 180 should advance the TEXT->format_spec as it goes. When FORMAT_DECODER 181 returns, TEXT->format_spec should point to the last character processed. 182 */ 183 printer_fn format_decoder; 184 185 /* Nonzero if current PREFIX was emitted at least once. */ 186 bool emitted_prefix; 187 188 /* Nonzero means one should emit a newline before outputting anything. */ 189 bool need_newline; 190 }; 191 192 #define pp_set_line_maximum_length(PP, L) \ 193 pp_base_set_line_maximum_length (pp_base (PP), L) 194 #define pp_set_prefix(PP, P) pp_base_set_prefix (pp_base (PP), P) 195 #define pp_destroy_prefix(PP) pp_base_destroy_prefix (pp_base (PP)) 196 #define pp_remaining_character_count_for_line(PP) \ 197 pp_base_remaining_character_count_for_line (pp_base (PP)) 198 #define pp_clear_output_area(PP) \ 199 pp_base_clear_output_area (pp_base (PP)) 200 #define pp_formatted_text(PP) pp_base_formatted_text (pp_base (PP)) 201 #define pp_last_position_in_text(PP) \ 202 pp_base_last_position_in_text (pp_base (PP)) 203 #define pp_emit_prefix(PP) pp_base_emit_prefix (pp_base (PP)) 204 #define pp_append_text(PP, B, E) \ 205 pp_base_append_text (pp_base (PP), B, E) 206 #define pp_flush(PP) pp_base_flush (pp_base (PP)) 207 #define pp_format(PP, TI) pp_base_format (pp_base (PP), TI) 208 #define pp_output_formatted_text(PP) \ 209 pp_base_output_formatted_text (pp_base (PP)) 210 #define pp_format_verbatim(PP, TI) \ 211 pp_base_format_verbatim (pp_base (PP), TI) 212 213 #define pp_character(PP, C) pp_base_character (pp_base (PP), C) 214 #define pp_string(PP, S) pp_base_string (pp_base (PP), S) 215 #define pp_newline(PP) pp_base_newline (pp_base (PP)) 216 217 #define pp_space(PP) pp_character (PP, ' ') 218 #define pp_left_paren(PP) pp_character (PP, '(') 219 #define pp_right_paren(PP) pp_character (PP, ')') 220 #define pp_left_bracket(PP) pp_character (PP, '[') 221 #define pp_right_bracket(PP) pp_character (PP, ']') 222 #define pp_left_brace(PP) pp_character (PP, '{') 223 #define pp_right_brace(PP) pp_character (PP, '}') 224 #define pp_semicolon(PP) pp_character (PP, ';') 225 #define pp_comma(PP) pp_string (PP, ", ") 226 #define pp_dot(PP) pp_character (PP, '.') 227 #define pp_colon(PP) pp_character (PP, ':') 228 #define pp_colon_colon(PP) pp_string (PP, "::") 229 #define pp_arrow(PP) pp_string (PP, "->") 230 #define pp_equal(PP) pp_character (PP, '=') 231 #define pp_question(PP) pp_character (PP, '?') 232 #define pp_bar(PP) pp_character (PP, '|') 233 #define pp_carret(PP) pp_character (PP, '^') 234 #define pp_ampersand(PP) pp_character (PP, '&') 235 #define pp_less(PP) pp_character (PP, '<') 236 #define pp_greater(PP) pp_character (PP, '>') 237 #define pp_plus(PP) pp_character (PP, '+') 238 #define pp_minus(PP) pp_character (PP, '-') 239 #define pp_star(PP) pp_character (PP, '*') 240 #define pp_slash(PP) pp_character (PP, '/') 241 #define pp_modulo(PP) pp_character (PP, '%') 242 #define pp_exclamation(PP) pp_character (PP, '!') 243 #define pp_complement(PP) pp_character (PP, '~') 244 #define pp_quote(PP) pp_character (PP, '\'') 245 #define pp_backquote(PP) pp_character (PP, '`') 246 #define pp_doublequote(PP) pp_character (PP, '"') 247 #define pp_newline_and_indent(PP, N) \ 248 do { \ 249 pp_indentation (PP) += N; \ 250 pp_newline (PP); \ 251 pp_base_indent (pp_base (PP)); \ 252 pp_needs_newline (PP) = false; \ 253 } while (0) 254 #define pp_maybe_newline_and_indent(PP, N) \ 255 if (pp_needs_newline (PP)) pp_newline_and_indent (PP, N) 256 #define pp_maybe_space(PP) pp_base_maybe_space (pp_base (PP)) 257 #define pp_separate_with(PP, C) \ 258 do { \ 259 pp_character (PP, C); \ 260 pp_space (PP); \ 261 } while (0) 262 #define pp_scalar(PP, FORMAT, SCALAR) \ 263 do \ 264 { \ 265 sprintf (pp_buffer (PP)->digit_buffer, FORMAT, SCALAR); \ 266 pp_string (PP, pp_buffer (PP)->digit_buffer); \ 267 } \ 268 while (0) 269 #define pp_decimal_int(PP, I) pp_scalar (PP, "%d", I) 270 #define pp_wide_integer(PP, I) \ 271 pp_scalar (PP, HOST_WIDE_INT_PRINT_DEC, (HOST_WIDE_INT) I) 272 #define pp_widest_integer(PP, I) \ 273 pp_scalar (PP, HOST_WIDEST_INT_PRINT_DEC, (HOST_WIDEST_INT) I) 274 #define pp_pointer(PP, P) pp_scalar (PP, "%p", P) 275 276 #define pp_identifier(PP, ID) pp_string (PP, ID) 277 #define pp_tree_identifier(PP, T) \ 278 pp_append_text(PP, IDENTIFIER_POINTER (T), \ 279 IDENTIFIER_POINTER (T) + IDENTIFIER_LENGTH (T)) 280 281 #define pp_unsupported_tree(PP, T) \ 282 pp_verbatim (pp_base (PP), "#%qs not supported by %s#", \ 283 tree_code_name[(int) TREE_CODE (T)], __FUNCTION__) 284 285 286 #define pp_buffer(PP) pp_base (PP)->buffer 287 /* Clients that directly derive from pretty_printer need to override 288 this macro to return a pointer to the base pretty_printer structure. */ 289 #define pp_base(PP) (PP) 290 291 extern void pp_construct (pretty_printer *, const char *, int); 292 extern void pp_base_set_line_maximum_length (pretty_printer *, int); 293 extern void pp_base_set_prefix (pretty_printer *, const char *); 294 extern void pp_base_destroy_prefix (pretty_printer *); 295 extern int pp_base_remaining_character_count_for_line (pretty_printer *); 296 extern void pp_base_clear_output_area (pretty_printer *); 297 extern const char *pp_base_formatted_text (pretty_printer *); 298 extern const char *pp_base_last_position_in_text (const pretty_printer *); 299 extern void pp_base_emit_prefix (pretty_printer *); 300 extern void pp_base_append_text (pretty_printer *, const char *, const char *); 301 302 /* This header may be included before toplev.h, hence the duplicate 303 definitions to allow for GCC-specific formats. */ 304 #if GCC_VERSION >= 3005 305 #define ATTRIBUTE_GCC_PPDIAG(m, n) __attribute__ ((__format__ (__gcc_diag__, m ,n))) ATTRIBUTE_NONNULL(m) 306 #else 307 #define ATTRIBUTE_GCC_PPDIAG(m, n) ATTRIBUTE_NONNULL(m) 308 #endif 309 extern void pp_printf (pretty_printer *, const char *, ...) 310 ATTRIBUTE_GCC_PPDIAG(2,3); 311 312 extern void pp_verbatim (pretty_printer *, const char *, ...) 313 ATTRIBUTE_GCC_PPDIAG(2,3); 314 extern void pp_base_flush (pretty_printer *); 315 extern void pp_base_format (pretty_printer *, text_info *); 316 extern void pp_base_output_formatted_text (pretty_printer *); 317 extern void pp_base_format_verbatim (pretty_printer *, text_info *); 318 319 extern void pp_base_indent (pretty_printer *); 320 extern void pp_base_newline (pretty_printer *); 321 extern void pp_base_character (pretty_printer *, int); 322 extern void pp_base_string (pretty_printer *, const char *); 323 extern void pp_write_text_to_stream (pretty_printer *pp); 324 extern void pp_base_maybe_space (pretty_printer *); 325 326 /* Switch into verbatim mode and return the old mode. */ 327 static inline pp_wrapping_mode_t 328 pp_set_verbatim_wrapping_ (pretty_printer *pp) 329 { 330 pp_wrapping_mode_t oldmode = pp_wrapping_mode (pp); 331 pp_line_cutoff (pp) = 0; 332 pp_prefixing_rule (pp) = DIAGNOSTICS_SHOW_PREFIX_NEVER; 333 return oldmode; 334 } 335 #define pp_set_verbatim_wrapping(PP) pp_set_verbatim_wrapping_ (pp_base (PP)) 336 337 #endif /* GCC_PRETTY_PRINT_H */ 338
