X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/05ac60f348b722ec6157cf57c31d8165466ec3ec..e0c653e7e660c353c59b054de571474450aa4c92:/src/muscle_tab.c?ds=sidebyside diff --git a/src/muscle_tab.c b/src/muscle_tab.c index 93d44cc9..fe6affb6 100644 --- a/src/muscle_tab.c +++ b/src/muscle_tab.c @@ -1,38 +1,41 @@ /* Muscle table manager for Bison. - Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software + Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. - Bison is free software; you can redistribute it and/or modify + This program 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. + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. - Bison is distributed in the hope that it will be useful, + This program 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 Bison; see the file COPYING. If not, write to - the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + along with this program. If not, see . */ +#include #include "system.h" #include #include +#include "complain.h" #include "files.h" #include "muscle_tab.h" #include "getargs.h" +/* A key-value pair, along with storage that can be reclaimed when + this pair is no longer needed. */ typedef struct { - const char *key; - char *value; + char const *key; + char const *value; + char *storage; } muscle_entry; /* An obstack used to create some entries. */ @@ -41,7 +44,7 @@ struct obstack muscle_obstack; /* Initial capacity of muscles hash table. */ #define HT_INITIAL_CAPACITY 257 -struct hash_table *muscle_table = NULL; +static struct hash_table *muscle_table = NULL; static bool hash_compare_muscles (void const *x, void const *y) @@ -63,6 +66,14 @@ hash_muscle (const void *x, size_t tablesize) | Also set up the MUSCLE_OBSTACK. | `-----------------------------------------------------------------*/ +static void +muscle_entry_free (void *entry) +{ + muscle_entry *mentry = entry; + free (mentry->storage); + free (mentry); +} + void muscle_init (void) { @@ -70,11 +81,10 @@ muscle_init (void) obstack_init (&muscle_obstack); muscle_table = hash_initialize (HT_INITIAL_CAPACITY, NULL, hash_muscle, - hash_compare_muscles, free); + hash_compare_muscles, muscle_entry_free); /* Version and input file. */ MUSCLE_INSERT_STRING ("version", VERSION); - MUSCLE_INSERT_C_STRING ("filename", grammar_file); } @@ -97,7 +107,7 @@ muscle_free (void) `------------------------------------------------------------*/ void -muscle_insert (const char *key, char *value) +muscle_insert (char const *key, char const *value) { muscle_entry probe; muscle_entry *entry; @@ -112,14 +122,17 @@ muscle_insert (const char *key, char *value) entry->key = key; hash_insert (muscle_table, entry); } + else + free (entry->storage); entry->value = value; + entry->storage = NULL; } /*-------------------------------------------------------------------. -| Insert (KEY, VALUE). If KEY already existed, overwrite the | -| previous value. Uses MUSCLE_OBSTACK. De-allocates the previously | -| associated value. VALUE and SEPARATOR are copied. | +| Append VALUE to the current value of KEY. If KEY did not already | +| exist, create it. Use MUSCLE_OBSTACK. De-allocate the previously | +| associated value. Copy VALUE and SEPARATOR. | `-------------------------------------------------------------------*/ void @@ -137,75 +150,451 @@ muscle_grow (const char *key, const char *val, const char *separator) entry = xmalloc (sizeof *entry); entry->key = key; hash_insert (muscle_table, entry); - entry->value = xstrdup (val); + entry->value = entry->storage = xstrdup (val); } else { /* Grow the current value. */ char *new_val; obstack_sgrow (&muscle_obstack, entry->value); - free (entry->value); + free (entry->storage); obstack_sgrow (&muscle_obstack, separator); obstack_sgrow (&muscle_obstack, val); obstack_1grow (&muscle_obstack, 0); new_val = obstack_finish (&muscle_obstack); - entry->value = xstrdup (new_val); + entry->value = entry->storage = xstrdup (new_val); obstack_free (&muscle_obstack, new_val); } } - /*------------------------------------------------------------------. -| Append VALUE to the current value of KEY, using muscle_grow. But | -| in addition, issue a synchronization line for the location LOC. | +| Using muscle_grow, append a synchronization line for the location | +| LOC to the current value of KEY. | `------------------------------------------------------------------*/ -void -muscle_code_grow (const char *key, const char *val, location loc) +static void +muscle_syncline_grow (char const *key, location loc) { char *extension = NULL; obstack_fgrow1 (&muscle_obstack, "]b4_syncline(%d, [[", loc.start.line); MUSCLE_OBSTACK_SGROW (&muscle_obstack, quotearg_style (c_quoting_style, loc.start.file)); - obstack_sgrow (&muscle_obstack, "]])[\n"); - obstack_sgrow (&muscle_obstack, val); + obstack_sgrow (&muscle_obstack, "]])["); obstack_1grow (&muscle_obstack, 0); extension = obstack_finish (&muscle_obstack); muscle_grow (key, extension, ""); + obstack_free (&muscle_obstack, extension); } +/*------------------------------------------------------------------. +| Append VALUE to the current value of KEY, using muscle_grow. But | +| in addition, issue a synchronization line for the location LOC | +| using muscle_syncline_grow. | +`------------------------------------------------------------------*/ + +void +muscle_code_grow (const char *key, const char *val, location loc) +{ + muscle_syncline_grow (key, loc); + muscle_grow (key, val, "\n"); +} -/*-------------------------------------------------------------------. -| MUSCLE is an M4 list of pairs. Create or extend it with the pair | -| (A1, A2). Note that because the muscle values are output *double* | -| quoted, one needs to strip the first level of quotes to reach the | -| list itself. | -`-------------------------------------------------------------------*/ void muscle_pair_list_grow (const char *muscle, const char *a1, const char *a2) { char *pair; - obstack_fgrow2 (&muscle_obstack, "[[[%s]], [[%s]]]", a1, a2); + obstack_sgrow (&muscle_obstack, "[[["); + MUSCLE_OBSTACK_SGROW (&muscle_obstack, a1); + obstack_sgrow (&muscle_obstack, "]], [["); + MUSCLE_OBSTACK_SGROW (&muscle_obstack, a2); + obstack_sgrow (&muscle_obstack, "]]]"); obstack_1grow (&muscle_obstack, 0); pair = obstack_finish (&muscle_obstack); muscle_grow (muscle, pair, ",\n"); obstack_free (&muscle_obstack, pair); } -/*-------------------------------. -| Find the value of muscle KEY. | -`-------------------------------*/ -char* -muscle_find (const char *key) +/*----------------------------------------------------------------------------. +| Find the value of muscle KEY. Unlike MUSCLE_FIND, this is always reliable | +| to determine whether KEY has a value. | +`----------------------------------------------------------------------------*/ + +char const * +muscle_find_const (char const *key) +{ + muscle_entry probe; + muscle_entry *result = NULL; + + probe.key = key; + result = hash_lookup (muscle_table, &probe); + if (result) + return result->value; + return NULL; +} + + +/*----------------------------------------------------------------------------. +| Find the value of muscle KEY. Abort if muscle_insert was invoked more | +| recently than muscle_grow for KEY since muscle_find can't return a | +| char const *. | +`----------------------------------------------------------------------------*/ + +char * +muscle_find (char const *key) { muscle_entry probe; muscle_entry *result = NULL; probe.key = key; result = hash_lookup (muscle_table, &probe); - return result ? result->value : NULL; + if (result) + { + aver (result->value == result->storage); + return result->storage; + } + return NULL; +} + + +void +muscle_boundary_grow (char const *key, boundary bound) +{ + char *extension; + MUSCLE_OBSTACK_SGROW (&muscle_obstack, bound.file); + obstack_1grow (&muscle_obstack, ':'); + obstack_fgrow1 (&muscle_obstack, "%d", bound.line); + obstack_1grow (&muscle_obstack, '.'); + obstack_fgrow1 (&muscle_obstack, "%d", bound.column); + obstack_1grow (&muscle_obstack, '\0'); + extension = obstack_finish (&muscle_obstack); + muscle_grow (key, extension, ""); + obstack_free (&muscle_obstack, extension); +} + +void +muscle_location_grow (char const *key, location loc) +{ + muscle_grow (key, "[[", ""); + muscle_boundary_grow (key, loc.start); + muscle_grow (key, "]], [[", ""); + muscle_boundary_grow (key, loc.end); + muscle_grow (key, "]]", ""); +} + +#define MUSCLE_COMMON_DECODE(Value) \ + case '$': \ + aver (*++(Value) == ']'); \ + aver (*++(Value) == '['); \ + obstack_sgrow (&muscle_obstack, "$"); \ + break; \ + case '@': \ + switch (*++(Value)) \ + { \ + case '@': obstack_sgrow (&muscle_obstack, "@" ); break; \ + case '{': obstack_sgrow (&muscle_obstack, "[" ); break; \ + case '}': obstack_sgrow (&muscle_obstack, "]" ); break; \ + default: aver (false); break; \ + } \ + break; \ + default: \ + obstack_1grow (&muscle_obstack, *(Value)); \ + break; + +/* Reverse of MUSCLE_OBSTACK_SGROW. */ +static char * +muscle_string_decode (char const *key) +{ + char const *value; + char *value_decoded; + char *result; + + value = muscle_find_const (key); + if (!value) + return NULL; + do { + switch (*value) + { + MUSCLE_COMMON_DECODE (value) + case '[': + case ']': + aver (false); + break; + } + } while (*value++); + value_decoded = obstack_finish (&muscle_obstack); + result = xstrdup (value_decoded); + obstack_free (&muscle_obstack, value_decoded); + return result; +} + +/* Reverse of muscle_location_grow. */ +static location +muscle_location_decode (char const *key) +{ + location loc; + char const *value = muscle_find_const (key); + aver (value); + aver (*value == '['); + aver (*++value == '['); + while (*++value) + switch (*value) + { + MUSCLE_COMMON_DECODE (value) + case '[': + aver (false); + break; + case ']': + { + char *boundary_str; + aver (*++value == ']'); + obstack_1grow (&muscle_obstack, '\0'); + boundary_str = obstack_finish (&muscle_obstack); + switch (*++value) + { + case ',': + boundary_set_from_string (&loc.start, boundary_str); + obstack_free (&muscle_obstack, boundary_str); + aver (*++value == ' '); + aver (*++value == '['); + aver (*++value == '['); + break; + case '\0': + boundary_set_from_string (&loc.end, boundary_str); + obstack_free (&muscle_obstack, boundary_str); + return loc; + break; + default: + aver (false); + break; + } + } + break; + } + aver (false); + return loc; +} + +void +muscle_user_name_list_grow (char const *key, char const *user_name, + location loc) +{ + muscle_grow (key, "[[[[", ","); + muscle_grow (key, user_name, ""); + muscle_grow (key, "]], ", ""); + muscle_location_grow (key, loc); + muscle_grow (key, "]]", ""); +} + +#define MUSCLE_USER_NAME_CONVERT(NAME, PREFIX, USER_NAME, SUFFIX) \ +do { \ + char *tmp; \ + size_t length = strlen ((USER_NAME)); \ + tmp = xmalloc (sizeof (PREFIX) - 1 + length + sizeof (SUFFIX)); \ + strcpy (tmp, (PREFIX)); \ + strcpy (tmp + sizeof (PREFIX) - 1, (USER_NAME)); \ + strcpy (tmp + sizeof (PREFIX) - 1 + length, (SUFFIX)); \ + (NAME) = uniqstr_new (tmp); \ + free (tmp); \ +} while (0) + +void +muscle_percent_define_insert (char const *variable, location variable_loc, + char const *value) +{ + char const *name; + char const *loc_name; + char const *syncline_name; + + MUSCLE_USER_NAME_CONVERT (name, "percent_define(", variable, ")"); + MUSCLE_USER_NAME_CONVERT (loc_name, "percent_define_loc(", variable, ")"); + MUSCLE_USER_NAME_CONVERT (syncline_name, + "percent_define_syncline(", variable, ")"); + + if (muscle_find_const (name)) + { + warn_at (variable_loc, _("%s `%s' redefined"), + "%define variable", variable); + warn_at (muscle_percent_define_get_loc (variable), + _("previous definition")); + } + MUSCLE_INSERT_STRING (name, value); + + muscle_insert (loc_name, ""); + muscle_location_grow (loc_name, variable_loc); + muscle_insert (syncline_name, ""); + muscle_syncline_grow (syncline_name, variable_loc); + muscle_user_name_list_grow ("percent_define_user_variables", variable, + variable_loc); +} + +char * +muscle_percent_define_get (char const *variable) +{ + char const *name; + char const *usage_name; + char *value; + + MUSCLE_USER_NAME_CONVERT (name, "percent_define(", variable, ")"); + MUSCLE_USER_NAME_CONVERT (usage_name, "percent_define_bison_variables(", + variable, ")"); + + muscle_insert (usage_name, ""); + value = muscle_string_decode (name); + if (!value) + value = xstrdup (""); + return value; +} + +location +muscle_percent_define_get_loc (char const *variable) +{ + char const *loc_name; + MUSCLE_USER_NAME_CONVERT (loc_name, "percent_define_loc(", variable, ")"); + if (!muscle_find_const (loc_name)) + fatal(_("undefined %%define variable `%s' passed to muscle_percent_define_get_loc"), + variable); + return muscle_location_decode (loc_name); +} + +char const * +muscle_percent_define_get_syncline (char const *variable) +{ + char const *syncline_name; + char const *syncline; + MUSCLE_USER_NAME_CONVERT (syncline_name, + "percent_define_syncline(", variable, ")"); + syncline = muscle_find_const (syncline_name); + if (!syncline) + fatal(_("undefined %%define variable `%s' passed to muscle_percent_define_get_syncline"), + variable); + return syncline; +} + +bool +muscle_percent_define_ifdef (char const *variable) +{ + char const *name; + char const *usage_name; + char const *value; + + MUSCLE_USER_NAME_CONVERT (name, "percent_define(", variable, ")"); + MUSCLE_USER_NAME_CONVERT (usage_name, "percent_define_bison_variables(", + variable, ")"); + + value = muscle_find_const (name); + if (value) + { + muscle_insert (usage_name, ""); + return true; + } + + return false; +} + +bool +muscle_percent_define_flag_if (char const *variable) +{ + char const *invalid_boolean_name; + bool result = false; + + MUSCLE_USER_NAME_CONVERT (invalid_boolean_name, + "percent_define_invalid_boolean(", variable, ")"); + + if (muscle_percent_define_ifdef (variable)) + { + char *value = muscle_percent_define_get (variable); + if (value[0] == '\0' || 0 == strcmp (value, "true")) + result = true; + else if (0 == strcmp (value, "false")) + result = false; + else if (!muscle_find_const (invalid_boolean_name)) + { + muscle_insert (invalid_boolean_name, ""); + complain_at(muscle_percent_define_get_loc (variable), + _("invalid value for %%define Boolean variable `%s'"), + variable); + } + free (value); + } + else + fatal(_("undefined %%define variable `%s' passed to muscle_percent_define_flag_if"), + variable); + + return result; +} + +void +muscle_percent_define_default (char const *variable, char const *value) +{ + char const *name; + char const *loc_name; + char const *syncline_name; + MUSCLE_USER_NAME_CONVERT (name, "percent_define(", variable, ")"); + MUSCLE_USER_NAME_CONVERT (loc_name, "percent_define_loc(", variable, ")"); + MUSCLE_USER_NAME_CONVERT (syncline_name, + "percent_define_syncline(", variable, ")"); + if (!muscle_find_const (name)) + { + location loc; + MUSCLE_INSERT_STRING (name, value); + loc.start.file = loc.end.file = "[Bison:muscle_percent_define_default]"; + loc.start.line = loc.end.line = 1; + loc.start.column = loc.end.column = 0; + muscle_insert (loc_name, ""); + muscle_location_grow (loc_name, loc); + muscle_insert (syncline_name, ""); + muscle_syncline_grow (syncline_name, loc); + } +} + +void +muscle_percent_define_check_values (char const * const *values) +{ + for (; *values; ++values) + { + char const *variable = *values; + char const *name; + char *value; + + MUSCLE_USER_NAME_CONVERT (name, "percent_define(", variable, ")"); + + value = muscle_string_decode (name); + if (value) + { + bool valid = false; + for (++values; *values; ++values) + { + if (0 == strcmp (value, *values)) + { + valid = true; + while (*values) + ++values; + break; + } + } + if (!valid) + complain_at(muscle_percent_define_get_loc (variable), + _("invalid value for %%define variable `%s': `%s'"), + variable, value); + free (value); + } + else + fatal(_("undefined %%define variable `%s' passed to muscle_percent_define_check_values"), + variable); + } +} + +void +muscle_percent_code_grow (char const *qualifier, location qualifier_loc, + char const *code, location code_loc) +{ + char const *name; + MUSCLE_USER_NAME_CONVERT (name, "percent_code(", qualifier, ")"); + muscle_code_grow (name, code, code_loc); + muscle_user_name_list_grow ("percent_code_user_qualifiers", qualifier, + qualifier_loc); }