mirror of
https://github.com/postgres/postgres.git
synced 2025-11-03 09:13:20 +03:00
Move parse2.pl to parse.pl
We have a SCM, so we don't need to keep old versions of files around.
This commit is contained in:
Peter Eisentraut
@@ -57,8 +57,8 @@ else
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@$(missing) flex $< $@
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endif
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preproc.y: ../../../backend/parser/gram.y parse2.pl ecpg.addons ecpg.header ecpg.tokens ecpg.trailer ecpg.type
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$(PERL) $(srcdir)/parse2.pl $(srcdir) < $< > $@
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preproc.y: ../../../backend/parser/gram.y parse.pl ecpg.addons ecpg.header ecpg.tokens ecpg.trailer ecpg.type
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$(PERL) $(srcdir)/parse.pl $(srcdir) < $< > $@
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$(PERL) $(srcdir)/check_rules.pl $(srcdir) $<
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ecpg_keywords.o c_keywords.o keywords.o preproc.o parser.o: preproc.h
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@@ -3,7 +3,7 @@ ECPG modifies and extends the core grammar in a way that
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defined in ecpg.tokens, types are defined in ecpg.type
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2) most tokens from the core grammar are simply converted
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to literals concatenated together to form the SQL string
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passed to the server, this is done by parse2.pl.
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passed to the server, this is done by parse.pl.
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3) some rules need side-effects, actions are either added
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or completely overridden (compared to the basic token
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concatenation) for them, these are defined in ecpg.addons,
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@@ -20,7 +20,7 @@ rules concatenated together. e.g. if gram.y has this:
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ruleA: tokenA tokenB tokenC {...}
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then "dumpedtokens" is "ruleAtokenAtokenBtokenC".
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"postfix" above can be:
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a) "block" - the automatic rule created by parse2.pl is completely
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a) "block" - the automatic rule created by parse.pl is completely
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overridden, the code block has to be written completely as
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it were in a plain bison grammar
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b) "rule" - the automatic rule is extended on, so new syntaxes
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@@ -1591,7 +1591,7 @@ ECPGCKeywords: S_AUTO { $$ = mm_strdup("auto"); }
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* CONNECTION can be added back in all_unreserved_keyword, but CURRENT and
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* INPUT are reserved for ecpg purposes.
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*
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* The mentioned exclusions are done by $replace_line settings in parse2.pl.
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* The mentioned exclusions are done by $replace_line settings in parse.pl.
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*/
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all_unreserved_keyword: unreserved_keyword { $$ = $1; }
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| ECPGunreserved_interval { $$ = $1; }
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File diff suppressed because it is too large
Load Diff
@@ -1,648 +0,0 @@
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#!/usr/bin/perl
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# src/interfaces/ecpg/preproc/parse2.pl
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# parser generater for ecpg version 2
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# call with backend parser as stdin
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#
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# Copyright (c) 2007-2011, PostgreSQL Global Development Group
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#
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# Written by Mike Aubury <mike.aubury@aubit.com>
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# Michael Meskes <meskes@postgresql.org>
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# Andy Colson <andy@squeakycode.net>
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#
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# Placed under the same license as PostgreSQL.
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#
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use strict;
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use warnings;
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no warnings 'uninitialized';
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my $path = shift @ARGV;
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$path = "." unless $path;
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my $copymode = 0;
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my $brace_indent = 0;
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my $yaccmode = 0;
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my $header_included = 0;
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my $feature_not_supported = 0;
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my $tokenmode = 0;
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my(%buff, $infield, $comment, %tokens, %addons );
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my($stmt_mode, @fields);
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my($line, $non_term_id);
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# some token have to be replaced by other symbols
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# either in the rule
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my %replace_token = (
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'BCONST' => 'ecpg_bconst',
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'FCONST' => 'ecpg_fconst',
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'Sconst' => 'ecpg_sconst',
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'IDENT' => 'ecpg_ident',
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'PARAM' => 'ecpg_param',
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);
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# or in the block
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my %replace_string = (
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'WITH_TIME' => 'with time',
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'NULLS_FIRST' => 'nulls first',
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'NULLS_LAST' => 'nulls last',
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'TYPECAST' => '::',
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'DOT_DOT' => '..',
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'COLON_EQUALS' => ':=',
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);
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# specific replace_types for specific non-terminals - never include the ':'
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# ECPG-only replace_types are defined in ecpg-replace_types
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my %replace_types = (
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'PrepareStmt' => '<prep>',
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'opt_array_bounds' => '<index>',
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# "ignore" means: do not create type and rules for this non-term-id
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'stmtblock' => 'ignore',
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'stmtmulti' => 'ignore',
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'CreateAsStmt' => 'ignore',
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'DeallocateStmt' => 'ignore',
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'ColId' => 'ignore',
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'type_function_name' => 'ignore',
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'ColLabel' => 'ignore',
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'Sconst' => 'ignore',
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);
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# these replace_line commands excise certain keywords from the core keyword
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# lists. Be sure to account for these in ColLabel and related productions.
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my %replace_line = (
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'unreserved_keywordCONNECTION' => 'ignore',
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'unreserved_keywordCURRENT_P' => 'ignore',
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'unreserved_keywordDAY_P' => 'ignore',
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'unreserved_keywordHOUR_P' => 'ignore',
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'unreserved_keywordINPUT_P' => 'ignore',
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'unreserved_keywordMINUTE_P' => 'ignore',
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'unreserved_keywordMONTH_P' => 'ignore',
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'unreserved_keywordSECOND_P' => 'ignore',
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'unreserved_keywordYEAR_P' => 'ignore',
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'col_name_keywordCHAR_P' => 'ignore',
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'col_name_keywordINT_P' => 'ignore',
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'col_name_keywordVALUES' => 'ignore',
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'reserved_keywordTO' => 'ignore',
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'reserved_keywordUNION' => 'ignore',
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# some other production rules have to be ignored or replaced
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'fetch_argsFORWARDopt_from_incursor_name' => 'ignore',
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'fetch_argsBACKWARDopt_from_incursor_name' => 'ignore',
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"opt_array_boundsopt_array_bounds'['Iconst']'" => 'ignore',
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'VariableShowStmtSHOWvar_name' => 'SHOW var_name ecpg_into',
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'VariableShowStmtSHOWTIMEZONE' => 'SHOW TIME ZONE ecpg_into',
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'VariableShowStmtSHOWTRANSACTIONISOLATIONLEVEL' => 'SHOW TRANSACTION ISOLATION LEVEL ecpg_into',
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'VariableShowStmtSHOWSESSIONAUTHORIZATION' => 'SHOW SESSION AUTHORIZATION ecpg_into',
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'returning_clauseRETURNINGtarget_list' => 'RETURNING target_list ecpg_into',
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'ExecuteStmtEXECUTEnameexecute_param_clause' => 'EXECUTE prepared_name execute_param_clause execute_rest',
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'ExecuteStmtCREATEOptTempTABLEcreate_as_targetASEXECUTEnameexecute_param_clause' =>
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'CREATE OptTemp TABLE create_as_target AS EXECUTE prepared_name execute_param_clause',
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'PrepareStmtPREPAREnameprep_type_clauseASPreparableStmt' =>
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'PREPARE prepared_name prep_type_clause AS PreparableStmt',
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'var_nameColId' => 'ECPGColId',
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);
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preload_addons();
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main();
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dump_buffer('header');
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dump_buffer('tokens');
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dump_buffer('types');
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dump_buffer('ecpgtype');
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dump_buffer('orig_tokens');
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print '%%', "\n";
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print 'prog: statements;', "\n";
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dump_buffer('rules');
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include_file( 'trailer', 'ecpg.trailer' );
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dump_buffer('trailer');
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sub main
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{
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line: while (<>)
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{
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if (/ERRCODE_FEATURE_NOT_SUPPORTED/)
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{
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$feature_not_supported = 1;
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next line;
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}
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chomp;
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# comment out the line below to make the result file match (blank line wise)
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# the prior version.
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#next if ($_ eq '');
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# Dump the action for a rule -
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# stmt_mode indicates if we are processing the 'stmt:'
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# rule (mode==0 means normal, mode==1 means stmt:)
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# flds are the fields to use. These may start with a '$' - in
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# which case they are the result of a previous non-terminal
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#
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# if they dont start with a '$' then they are token name
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#
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# len is the number of fields in flds...
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# leadin is the padding to apply at the beginning (just use for formatting)
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if (/^%%/) {
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$tokenmode = 2;
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$copymode = 1;
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$yaccmode++;
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$infield = 0;
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}
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my $prec = 0;
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# Make sure any braces are split
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s/{/ { /g;
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s/}/ } /g;
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# Any comments are split
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s|\/\*| /* |g;
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s|\*\/| */ |g;
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# Now split the line into individual fields
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my @arr = split(' ');
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if ( $arr[0] eq '%token' && $tokenmode == 0 )
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{
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$tokenmode = 1;
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include_file( 'tokens', 'ecpg.tokens' );
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}
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elsif ( $arr[0] eq '%type' && $header_included == 0 )
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{
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include_file( 'header', 'ecpg.header' );
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include_file( 'ecpgtype', 'ecpg.type' );
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$header_included = 1;
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}
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if ( $tokenmode == 1 )
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{
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my $str = '';
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my $prior = '';
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for my $a (@arr)
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{
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if ( $a eq '/*' )
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{
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$comment++;
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next;
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}
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if ( $a eq '*/' )
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{
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$comment--;
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next;
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}
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if ($comment)
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{
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next;
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}
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if ( substr( $a, 0, 1 ) eq '<' ) {
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next;
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# its a type
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}
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$tokens{ $a } = 1;
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$str = $str . ' ' . $a;
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if ( $a eq 'IDENT' && $prior eq '%nonassoc' )
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{
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# add two more tokens to the list
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$str = $str . "\n%nonassoc CSTRING\n%nonassoc UIDENT";
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}
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$prior = $a;
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}
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add_to_buffer( 'orig_tokens', $str );
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next line;
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}
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# Dont worry about anything if we're not in the right section of gram.y
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if ( $yaccmode != 1 )
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{
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next line;
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}
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# Go through each field in turn
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for (my $fieldIndexer = 0 ; $fieldIndexer < scalar(@arr) ; $fieldIndexer++ )
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{
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if ( $arr[$fieldIndexer] eq '*/' && $comment )
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{
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$comment = 0;
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next;
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}
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elsif ($comment)
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{
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next;
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}
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elsif ( $arr[$fieldIndexer] eq '/*' )
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{
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# start of a multiline comment
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$comment = 1;
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next;
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}
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elsif ( $arr[$fieldIndexer] eq '//' )
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{
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next line;
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}
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elsif ( $arr[$fieldIndexer] eq '}' )
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{
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$brace_indent--;
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next;
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}
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elsif ( $arr[$fieldIndexer] eq '{' )
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{
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$brace_indent++;
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next;
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}
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if ( $brace_indent > 0 )
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{
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next;
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}
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if ( $arr[$fieldIndexer] eq ';' )
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{
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if ($copymode)
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{
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if ( $infield )
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{
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dump_line( $stmt_mode, \@fields );
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}
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add_to_buffer( 'rules', ";\n\n" );
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}
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else
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{
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$copymode = 1;
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}
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@fields = ();
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$infield = 0;
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$line = '';
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next;
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}
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if ( $arr[$fieldIndexer] eq '|' )
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{
|
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if ($copymode)
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{
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if ( $infield )
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{
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$infield = $infield + dump_line( $stmt_mode, \@fields );
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}
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if ( $infield > 1 )
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{
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$line = '| ';
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}
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}
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@fields = ();
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next;
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}
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|
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if ( exists $replace_token{ $arr[$fieldIndexer] } )
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{
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$arr[$fieldIndexer] = $replace_token{ $arr[$fieldIndexer] };
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||||
}
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||||
|
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# Are we looking at a declaration of a non-terminal ?
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if ( ( $arr[$fieldIndexer] =~ /[A-Za-z0-9]+:/ )
|
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|| $arr[ $fieldIndexer + 1 ] eq ':' )
|
||||
{
|
||||
$non_term_id = $arr[$fieldIndexer];
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||||
$non_term_id =~ tr/://d;
|
||||
|
||||
if ( not defined $replace_types{$non_term_id} )
|
||||
{
|
||||
$replace_types{$non_term_id} = '<str>';
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||||
$copymode = 1;
|
||||
}
|
||||
elsif ( $replace_types{$non_term_id} eq 'ignore' )
|
||||
{
|
||||
$copymode = 0;
|
||||
$line = '';
|
||||
next line;
|
||||
}
|
||||
$line = $line . ' ' . $arr[$fieldIndexer];
|
||||
|
||||
# Do we have the : attached already ?
|
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# If yes, we'll have already printed the ':'
|
||||
if ( !( $arr[$fieldIndexer] =~ '[A-Za-z0-9]+:' ) )
|
||||
{
|
||||
# Consume the ':' which is next...
|
||||
$line = $line . ':';
|
||||
$fieldIndexer++;
|
||||
}
|
||||
|
||||
# Special mode?
|
||||
if ( $non_term_id eq 'stmt' )
|
||||
{
|
||||
$stmt_mode = 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
$stmt_mode = 0;
|
||||
}
|
||||
my $tstr = '%type ' . $replace_types{$non_term_id} . ' ' . $non_term_id;
|
||||
add_to_buffer( 'types', $tstr );
|
||||
|
||||
if ($copymode)
|
||||
{
|
||||
add_to_buffer( 'rules', $line );
|
||||
}
|
||||
$line = '';
|
||||
@fields = ();
|
||||
$infield = 1;
|
||||
next;
|
||||
}
|
||||
elsif ($copymode) {
|
||||
$line = $line . ' ' . $arr[$fieldIndexer];
|
||||
}
|
||||
if ( $arr[$fieldIndexer] eq '%prec' )
|
||||
{
|
||||
$prec = 1;
|
||||
next;
|
||||
}
|
||||
|
||||
if ( $copymode
|
||||
&& !$prec
|
||||
&& !$comment
|
||||
&& length( $arr[$fieldIndexer] )
|
||||
&& $infield )
|
||||
{
|
||||
if (
|
||||
$arr[$fieldIndexer] ne 'Op'
|
||||
&& ( $tokens{ $arr[$fieldIndexer] } > 0 || $arr[$fieldIndexer] =~ /'.+'/ )
|
||||
|| $stmt_mode == 1
|
||||
)
|
||||
{
|
||||
my $S;
|
||||
if ( exists $replace_string{ $arr[$fieldIndexer] } )
|
||||
{
|
||||
$S = $replace_string{ $arr[$fieldIndexer] };
|
||||
}
|
||||
else
|
||||
{
|
||||
$S = $arr[$fieldIndexer];
|
||||
}
|
||||
$S =~ s/_P//g;
|
||||
$S =~ tr/'//d;
|
||||
if ( $stmt_mode == 1 )
|
||||
{
|
||||
push(@fields, $S);
|
||||
}
|
||||
else
|
||||
{
|
||||
push(@fields, lc($S));
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
push(@fields, '$' . (scalar(@fields)+1));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
# append a file onto a buffer.
|
||||
# Arguments: buffer_name, filename (without path)
|
||||
sub include_file
|
||||
{
|
||||
my ($buffer, $filename) = @_;
|
||||
my $full = "$path/$filename";
|
||||
open(my $fh, '<', $full) or die;
|
||||
while ( <$fh> )
|
||||
{
|
||||
chomp;
|
||||
add_to_buffer( $buffer, $_ );
|
||||
}
|
||||
close($fh);
|
||||
}
|
||||
|
||||
sub include_addon
|
||||
{
|
||||
my($buffer, $block, $fields, $stmt_mode) = @_;
|
||||
my $rec = $addons{$block};
|
||||
return 0 unless $rec;
|
||||
|
||||
if ( $rec->{type} eq 'rule' )
|
||||
{
|
||||
dump_fields( $stmt_mode, $fields, ' { ' );
|
||||
}
|
||||
elsif ( $rec->{type} eq 'addon' )
|
||||
{
|
||||
add_to_buffer( 'rules', ' { ' );
|
||||
}
|
||||
|
||||
#add_to_buffer( $stream, $_ );
|
||||
#We have an array to add to the buffer, we'll add it ourself instead of
|
||||
#calling add_to_buffer, which does not know about arrays
|
||||
|
||||
push( @{ $buff{$buffer} }, @{ $rec->{lines} } );
|
||||
|
||||
if ( $rec->{type} eq 'addon' )
|
||||
{
|
||||
dump_fields( $stmt_mode, $fields, '' );
|
||||
}
|
||||
|
||||
|
||||
# if we added something (ie there are lines in our array), return 1
|
||||
return 1 if (scalar(@{ $rec->{lines} }) > 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
# include_addon does this same thing, but does not call this
|
||||
# sub... so if you change this, you need to fix include_addon too
|
||||
# Pass: buffer_name, string_to_append
|
||||
sub add_to_buffer
|
||||
{
|
||||
push( @{ $buff{$_[0]} }, "$_[1]\n" );
|
||||
}
|
||||
|
||||
sub dump_buffer
|
||||
{
|
||||
my($buffer) = @_;
|
||||
print '/* ', $buffer, ' */',"\n";
|
||||
my $ref = $buff{$buffer};
|
||||
print @$ref;
|
||||
}
|
||||
|
||||
sub dump_fields
|
||||
{
|
||||
my ( $mode, $flds, $ln ) = @_;
|
||||
my $len = scalar(@$flds);
|
||||
|
||||
if ( $mode == 0 )
|
||||
{
|
||||
#Normal
|
||||
add_to_buffer( 'rules', $ln );
|
||||
if ( $feature_not_supported == 1 )
|
||||
{
|
||||
# we found an unsupported feature, but we have to
|
||||
# filter out ExecuteStmt: CREATE OptTemp TABLE ...
|
||||
# because the warning there is only valid in some situations
|
||||
if ( $flds->[0] ne 'create' || $flds->[2] ne 'table' )
|
||||
{
|
||||
add_to_buffer( 'rules',
|
||||
'mmerror(PARSE_ERROR, ET_WARNING, "unsupported feature will be passed to server");'
|
||||
);
|
||||
}
|
||||
$feature_not_supported = 0;
|
||||
}
|
||||
|
||||
if ( $len == 0 )
|
||||
{
|
||||
# We have no fields ?
|
||||
add_to_buffer( 'rules', ' $$=EMPTY; }' );
|
||||
}
|
||||
else
|
||||
{
|
||||
# Go through each field and try to 'aggregate' the tokens
|
||||
# into a single 'mm_strdup' where possible
|
||||
my @flds_new;
|
||||
my $str;
|
||||
for ( my $z = 0 ; $z < $len ; $z++ )
|
||||
{
|
||||
if ( substr( $flds->[$z], 0, 1 ) eq '$' )
|
||||
{
|
||||
push(@flds_new, $flds->[$z]);
|
||||
next;
|
||||
}
|
||||
|
||||
$str = $flds->[$z];
|
||||
|
||||
while (1)
|
||||
{
|
||||
if ( $z >= $len - 1 || substr( $flds->[ $z + 1 ], 0, 1 ) eq '$' )
|
||||
{
|
||||
# We're at the end...
|
||||
push(@flds_new, "mm_strdup(\"$str\")");
|
||||
last;
|
||||
}
|
||||
$z++;
|
||||
$str = $str . ' ' . $flds->[$z];
|
||||
}
|
||||
}
|
||||
|
||||
# So - how many fields did we end up with ?
|
||||
$len = scalar(@flds_new);
|
||||
if ( $len == 1 )
|
||||
{
|
||||
# Straight assignement
|
||||
$str = ' $$ = ' . $flds_new[0] . ';';
|
||||
add_to_buffer( 'rules', $str );
|
||||
}
|
||||
else
|
||||
{
|
||||
# Need to concatenate the results to form
|
||||
# our final string
|
||||
$str = ' $$ = cat_str(' . $len . ',' . join(',', @flds_new) . ');';
|
||||
add_to_buffer( 'rules', $str );
|
||||
}
|
||||
add_to_buffer( 'rules', '}' );
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
# we're in the stmt: rule
|
||||
if ($len)
|
||||
{
|
||||
# or just the statement ...
|
||||
add_to_buffer( 'rules', ' { output_statement($1, 0, ECPGst_normal); }' );
|
||||
}
|
||||
else
|
||||
{
|
||||
add_to_buffer( 'rules', ' { $$ = NULL; }' );
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
sub dump_line
|
||||
{
|
||||
my($stmt_mode, $fields) = @_;
|
||||
my $block = $non_term_id . $line;
|
||||
$block =~ tr/ |//d;
|
||||
my $rep = $replace_line{$block};
|
||||
if ($rep)
|
||||
{
|
||||
if ($rep eq 'ignore' )
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
if ( index( $line, '|' ) != -1 )
|
||||
{
|
||||
$line = '| ' . $rep;
|
||||
}
|
||||
else
|
||||
{
|
||||
$line = $rep;
|
||||
}
|
||||
$block = $non_term_id . $line;
|
||||
$block =~ tr/ |//d;
|
||||
}
|
||||
add_to_buffer( 'rules', $line );
|
||||
my $i = include_addon( 'rules', $block, $fields, $stmt_mode);
|
||||
if ( $i == 0 )
|
||||
{
|
||||
dump_fields( $stmt_mode, $fields, ' { ' );
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
=top
|
||||
load addons into cache
|
||||
%addons = {
|
||||
stmtClosePortalStmt => { 'type' => 'block', 'lines' => [ "{", "if (INFORMIX_MODE)" ..., "}" ] },
|
||||
stmtViewStmt => { 'type' => 'rule', 'lines' => [ "| ECPGAllocateDescr", ... ] }
|
||||
}
|
||||
|
||||
=cut
|
||||
sub preload_addons
|
||||
{
|
||||
my $filename = $path . "/ecpg.addons";
|
||||
open(my $fh, '<', $filename) or die;
|
||||
# there may be multple lines starting ECPG: and then multiple lines of code.
|
||||
# the code need to be add to all prior ECPG records.
|
||||
my (@needsRules, @code, $record);
|
||||
# there may be comments before the first ECPG line, skip them
|
||||
my $skip = 1;
|
||||
while ( <$fh> )
|
||||
{
|
||||
if (/^ECPG:\s(\S+)\s?(\w+)?/)
|
||||
{
|
||||
$skip = 0;
|
||||
if (@code)
|
||||
{
|
||||
for my $x (@needsRules)
|
||||
{
|
||||
push(@{ $x->{lines} }, @code);
|
||||
}
|
||||
@code = ();
|
||||
@needsRules = ();
|
||||
}
|
||||
$record = {};
|
||||
$record->{type} = $2;
|
||||
$record->{lines} = [];
|
||||
if (exists $addons{$1}) { die "Ga! there are dups!\n"; }
|
||||
$addons{$1} = $record;
|
||||
push(@needsRules, $record);
|
||||
}
|
||||
else
|
||||
{
|
||||
next if $skip;
|
||||
push(@code, $_);
|
||||
}
|
||||
}
|
||||
close($fh);
|
||||
if (@code)
|
||||
{
|
||||
for my $x (@needsRules)
|
||||
{
|
||||
push(@{ $x->{lines} }, @code);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user