diff options
Diffstat (limited to 'gcc/cobol/lexio.cc')
-rw-r--r-- | gcc/cobol/lexio.cc | 145 |
1 files changed, 96 insertions, 49 deletions
diff --git a/gcc/cobol/lexio.cc b/gcc/cobol/lexio.cc index 2d9fb72..0aebe52 100644 --- a/gcc/cobol/lexio.cc +++ b/gcc/cobol/lexio.cc @@ -38,29 +38,24 @@ extern int yy_flex_debug; -static struct { - bool first_file, explicitly; - int column, right_margin; - bool inference_pending() { - bool tf = first_file && !explicitly; - first_file = false; - return tf; - } - inline bool is_fixed() const { return column == 7; } - inline bool is_reffmt() const { return is_fixed() && right_margin == 73; } - inline bool is_free() const { return ! is_fixed(); } - - const char * description() const { - if( is_reffmt() ) return "REFERENCE"; - if( is_fixed() ) return "FIXED"; - if( is_free() ) return "FREE"; - gcc_unreachable(); - } -} indicator = { true, false, 0, 0 }; +source_format_t& cdf_source_format(); + +void +source_format_t::infer( const char *bol, bool want_reference_format ) { + if( bol ) { + left = 7; + if( want_reference_format ) { + right = 73; + } + } + dbgmsg("%s:%d: %s format detected", __func__, __LINE__, + description()); +} + // public source format test functions -bool is_fixed_format() { return indicator.is_fixed(); } -bool is_reference_format() { return indicator.is_reffmt(); } +bool is_fixed_format() { return cdf_source_format().is_fixed(); } +bool is_reference_format() { return cdf_source_format().is_reffmt(); } static bool debug_mode = false; @@ -76,11 +71,10 @@ static bool debug_mode = false; */ static inline int left_margin() { - return indicator.column == 0? indicator.column : indicator.column - 1; + return cdf_source_format().left_margin(); } static inline int right_margin() { - return indicator.right_margin == 0? - indicator.right_margin : indicator.right_margin - 1; + return cdf_source_format().right_margin(); } /* @@ -89,18 +83,9 @@ static inline int right_margin() { * When setting back to 0 (free), the right margin is also reset to 0. */ void -cobol_set_indicator_column( int column ) -{ - indicator.explicitly = true; - if( column == 0 ) indicator.right_margin = 0; - if( column < 0 ) { - column = -column; - indicator.right_margin = 73; - } - indicator.column = column; -} +cobol_set_indicator_column( int column ); -bool include_debug() { return indicator.column == 7 && debug_mode; } +bool include_debug() { return is_fixed_format() && debug_mode; } bool set_debug( bool tf ) { return debug_mode = tf && is_fixed_format(); } static bool nonblank( const char ch ) { return !isblank(ch); } @@ -114,7 +99,7 @@ start_of_line( char *bol, char *eol ) { static inline char * continues_at( char *bol, char *eol ) { - if( indicator.column == 0 ) return NULL; // cannot continue in free format + if( cdf_source_format().is_free() ) return NULL; // cannot continue in free format bol += left_margin(); if( *bol != '-' ) return NULL; // not a continuation line return start_of_line(++bol, eol); @@ -124,7 +109,7 @@ continues_at( char *bol, char *eol ) { // NULL means no indicator column or tested value not present. static inline char * indicated( char *bol, const char *eol, char ch = '\0' ) { - if( indicator.column == 0 && *bol != '*' ) { + if( cdf_source_format().left_margin() == 0 && *bol != '*' ) { return NULL; // no indicator column in free format, except for comments } gcc_assert(bol != NULL); @@ -336,7 +321,69 @@ recognize_replacements( filespan_t mfile, std::list<replace_t>& pending_replacem } static void +check_push_pop_directive( filespan_t& mfile ) { + char eol = '\0'; + const char *p = std::find(mfile.cur, mfile.eol, '>'); + if( ! (p < mfile.eol && p[1] == *p ) ) return; + + const char pattern[] = + ">>[[:blank:]]*(push|pop)[[:blank:]]+" + "(" + "all|" + "call-convention|" + "cobol-words|" + "define|" + "source[[:blank:]]+format|" + "turn" + ")"; + static regex re(pattern, extended_icase); + + // show contents of marked subexpressions within each match + cmatch cm; + + std::swap(*mfile.eol, eol); // see implementation for excuses + bool ok = regex_search(p, const_cast<const char *>(mfile.eol), cm, re); + std::swap(*mfile.eol, eol); + + if( ok ) { + gcc_assert(cm.size() > 1); + bool push = TOUPPER(cm[1].first[1]) == 'U'; + switch( TOUPPER(cm[2].first[0]) ) { + case 'A': // ALL + push? cdf_push() : cdf_pop(); + break; + case 'C': + switch( TOUPPER(cm[2].first[1]) ) { + case 'A': // CALL-CONVENTION + push? cdf_push_call_convention() : cdf_pop_call_convention(); + break; + case 'O': // COBOL-WORDS + push? cdf_push_current_tokens() : cdf_pop_current_tokens(); + break; + default: + gcc_unreachable(); + } + break; + case 'D': // DEFINE + push? cdf_push_dictionary() : cdf_pop_dictionary(); + break; + case 'S': // SOURCE FORMAT + push? cdf_push_source_format() : cdf_pop_source_format(); + break; + case 'T': // TURN + push? cdf_push_enabled_exceptions() : cdf_pop_enabled_exceptions(); + break; + default: + gcc_unreachable(); + } + erase_line(const_cast<char*>(cm[0].first), + const_cast<char*>(cm[0].second)); + } +} + +static void check_source_format_directive( filespan_t& mfile ) { + char eol = '\0'; const char *p = std::find(mfile.cur, mfile.eol, '>'); if( ! (p < mfile.eol && p[1] == *p ) ) return; @@ -349,7 +396,12 @@ check_source_format_directive( filespan_t& mfile ) { // show contents of marked subexpressions within each match cmatch cm; - if( regex_search(p, const_cast<const char *>(mfile.eol), cm, re) ) { + + std::swap(*mfile.eol, eol); // see implementation for excuses + bool ok = regex_search(p, const_cast<const char *>(mfile.eol), cm, re); + std::swap(*mfile.eol, eol); + + if( ok ) { gcc_assert(cm.size() > 1); switch( cm[3].length() ) { case 4: @@ -365,11 +417,11 @@ check_source_format_directive( filespan_t& mfile ) { dbgmsg( "%s:%d: %s format set, on line " HOST_SIZE_T_PRINT_UNSIGNED, __func__, __LINE__, - indicator.column == 7? "FIXED" : "FREE", + cdf_source_format().description(), (fmt_size_t)mfile.lineno() ); - char *bol = indicator.is_fixed()? mfile.cur : const_cast<char*>(cm[0].first); + char *bol = cdf_source_format().is_fixed()? mfile.cur : const_cast<char*>(cm[0].first); + gcc_assert(cm[0].second <= mfile.eol); erase_line(bol, const_cast<char*>(cm[0].second)); - mfile.cur = const_cast<char*>(cm[0].second); } } @@ -1695,20 +1747,15 @@ cdftext::free_form_reference_format( int input ) { /* * Infer source code format. */ - if( indicator.inference_pending() ) { + if( cdf_source_format().inference_pending() ) { const char *bol = valid_sequence_area(mfile.data, mfile.eodata); if( bol ) { - indicator.column = 7; - if( infer_reference_format(bol, mfile.eodata) ) { - indicator.right_margin = 73; - } + cdf_source_format().infer( bol, infer_reference_format(bol, mfile.eodata) ); } - - dbgmsg("%s:%d: %s format detected", __func__, __LINE__, - indicator.description()); } while( mfile.next_line() ) { + check_push_pop_directive(mfile); check_source_format_directive(mfile); remove_inline_comment(mfile.cur, mfile.eol); |