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519 lines
9.4 KiB
519 lines
9.4 KiB
// Scintilla source code edit control
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/** @file LexOpal.cxx
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** Lexer for OPAL (functional language similar to Haskell)
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** Written by Sebastian Pipping <webmaster@hartwork.org>
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**/
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include "Platform.h"
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#include "PropSet.h"
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#include "Accessor.h"
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#include "KeyWords.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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#include "StyleContext.h"
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inline static void getRange( unsigned int start, unsigned int end, Accessor & styler, char * s, unsigned int len )
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{
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unsigned int i = 0;
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while( ( i < end - start + 1 ) && ( i < len - 1 ) )
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{
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s[i] = static_cast<char>( styler[ start + i ] );
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i++;
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}
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s[ i ] = '\0';
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}
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inline bool HandleString( unsigned int & cur, unsigned int one_too_much, Accessor & styler )
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{
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char ch;
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// Wait for string to close
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bool even_backslash_count = true; // Without gaps in between
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cur++; // Skip initial quote
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for( ; ; )
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{
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if( cur >= one_too_much )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_STRING );
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return false; // STOP
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}
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ch = styler.SafeGetCharAt( cur );
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if( ( ch == '\015' ) || ( ch == '\012' ) ) // Deny multi-line strings
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{
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styler.ColourTo( cur - 1, SCE_OPAL_STRING );
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styler.StartSegment( cur );
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return true;
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}
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else
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{
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if( even_backslash_count )
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{
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if( ch == '"' )
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{
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styler.ColourTo( cur, SCE_OPAL_STRING );
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cur++;
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if( cur >= one_too_much )
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{
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return false; // STOP
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}
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else
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{
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styler.StartSegment( cur );
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return true;
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}
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}
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else if( ch == '\\' )
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{
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even_backslash_count = false;
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}
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}
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else
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{
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even_backslash_count = true;
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}
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}
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cur++;
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}
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}
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inline bool HandleCommentBlock( unsigned int & cur, unsigned int one_too_much, Accessor & styler, bool could_fail )
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{
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char ch;
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if( could_fail )
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{
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cur++;
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if( cur >= one_too_much )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_DEFAULT );
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return false; // STOP
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}
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ch = styler.SafeGetCharAt( cur );
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if( ch != '*' )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_DEFAULT );
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styler.StartSegment( cur );
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return true;
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}
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}
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// Wait for comment close
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cur++;
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bool star_found = false;
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for( ; ; )
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{
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if( cur >= one_too_much )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_COMMENT_BLOCK );
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return false; // STOP
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}
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ch = styler.SafeGetCharAt( cur );
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if( star_found )
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{
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if( ch == '/' )
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{
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styler.ColourTo( cur, SCE_OPAL_COMMENT_BLOCK );
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cur++;
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if( cur >= one_too_much )
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{
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return false; // STOP
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}
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else
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{
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styler.StartSegment( cur );
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return true;
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}
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}
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else if( ch != '*' )
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{
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star_found = false;
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}
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}
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else if( ch == '*' )
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{
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star_found = true;
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}
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cur++;
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}
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}
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inline bool HandleCommentLine( unsigned int & cur, unsigned int one_too_much, Accessor & styler, bool could_fail )
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{
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char ch;
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if( could_fail )
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{
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cur++;
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if( cur >= one_too_much )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_DEFAULT );
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return false; // STOP
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}
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ch = styler.SafeGetCharAt( cur );
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if( ch != '-' )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_DEFAULT );
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styler.StartSegment( cur );
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return true;
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}
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cur++;
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if( cur >= one_too_much )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_DEFAULT );
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return false; // STOP
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}
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ch = styler.SafeGetCharAt( cur );
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if( ( ch != ' ' ) && ( ch != '\t' ) )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_DEFAULT );
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styler.StartSegment( cur );
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return true;
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}
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}
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// Wait for end of line
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bool fifteen_found = false;
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for( ; ; )
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{
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cur++;
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if( cur >= one_too_much )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_COMMENT_LINE );
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return false; // STOP
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}
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ch = styler.SafeGetCharAt( cur );
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if( fifteen_found )
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{
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/*
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if( ch == '\012' )
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{
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// One newline on Windows (015, 012)
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}
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else
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{
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// One newline on MAC (015) and another char
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}
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*/
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cur--;
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styler.ColourTo( cur - 1, SCE_OPAL_COMMENT_LINE );
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styler.StartSegment( cur );
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return true;
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}
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else
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{
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if( ch == '\015' )
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{
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fifteen_found = true;
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}
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else if( ch == '\012' )
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{
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// One newline on Linux (012)
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styler.ColourTo( cur - 1, SCE_OPAL_COMMENT_LINE );
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styler.StartSegment( cur );
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return true;
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}
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}
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}
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}
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inline bool HandlePar( unsigned int & cur, Accessor & styler )
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{
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styler.ColourTo( cur, SCE_OPAL_PAR );
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cur++;
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styler.StartSegment( cur );
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return true;
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}
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inline bool HandleSpace( unsigned int & cur, unsigned int one_too_much, Accessor & styler )
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{
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char ch;
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cur++;
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for( ; ; )
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{
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if( cur >= one_too_much )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_SPACE );
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return false;
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}
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ch = styler.SafeGetCharAt( cur );
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switch( ch )
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{
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case ' ':
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case '\t':
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case '\015':
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case '\012':
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cur++;
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break;
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default:
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styler.ColourTo( cur - 1, SCE_OPAL_SPACE );
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styler.StartSegment( cur );
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return true;
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}
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}
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}
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inline bool HandleInteger( unsigned int & cur, unsigned int one_too_much, Accessor & styler )
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{
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char ch;
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for( ; ; )
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{
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cur++;
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if( cur >= one_too_much )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_INTEGER );
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return false; // STOP
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}
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ch = styler.SafeGetCharAt( cur );
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if( !isdigit( ch ) )
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{
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styler.ColourTo( cur - 1, SCE_OPAL_INTEGER );
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styler.StartSegment( cur );
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return true;
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}
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}
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}
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inline bool HandleWord( unsigned int & cur, unsigned int one_too_much, Accessor & styler, WordList * keywordlists[] )
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{
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char ch;
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const unsigned int beg = cur;
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cur++;
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for( ; ; )
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{
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ch = styler.SafeGetCharAt( cur );
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if( ( ch != '_' ) && ( ch != '-' ) &&
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!islower( ch ) && !isupper( ch ) && !isdigit( ch ) ) break;
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cur++;
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if( cur >= one_too_much )
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{
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break;
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}
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}
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const int ide_len = cur - beg + 1;
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char * ide = new char[ ide_len ];
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getRange( beg, cur, styler, ide, ide_len );
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WordList & keywords = *keywordlists[ 0 ];
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WordList & classwords = *keywordlists[ 1 ];
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if( keywords.InList( ide ) ) // Keyword
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{
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delete [] ide;
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styler.ColourTo( cur - 1, SCE_OPAL_KEYWORD );
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if( cur >= one_too_much )
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{
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return false; // STOP
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}
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else
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{
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styler.StartSegment( cur );
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return true;
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}
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}
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else if( classwords.InList( ide ) ) // Sort
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{
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delete [] ide;
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styler.ColourTo( cur - 1, SCE_OPAL_SORT );
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if( cur >= one_too_much )
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{
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return false; // STOP
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}
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else
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{
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styler.StartSegment( cur );
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return true;
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}
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}
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else if( !strcmp( ide, "true" ) || !strcmp( ide, "false" ) ) // Bool const
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{
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delete [] ide;
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styler.ColourTo( cur - 1, SCE_OPAL_BOOL_CONST );
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if( cur >= one_too_much )
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{
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return false; // STOP
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}
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else
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{
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styler.StartSegment( cur );
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return true;
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}
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}
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else // Unknown keyword
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{
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delete [] ide;
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styler.ColourTo( cur - 1, SCE_OPAL_DEFAULT );
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if( cur >= one_too_much )
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{
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return false; // STOP
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}
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else
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{
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styler.StartSegment( cur );
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return true;
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}
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}
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}
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inline bool HandleSkip( unsigned int & cur, unsigned int one_too_much, Accessor & styler )
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{
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cur++;
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styler.ColourTo( cur - 1, SCE_OPAL_DEFAULT );
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if( cur >= one_too_much )
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{
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return false; // STOP
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}
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else
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{
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styler.StartSegment( cur );
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return true;
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}
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}
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static void ColouriseOpalDoc( unsigned int startPos, int length, int initStyle, WordList *keywordlists[], Accessor & styler )
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{
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styler.StartAt( startPos );
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styler.StartSegment( startPos );
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unsigned int & cur = startPos;
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const unsigned int one_too_much = startPos + length;
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int state = initStyle;
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for( ; ; )
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{
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switch( state )
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{
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case SCE_OPAL_KEYWORD:
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case SCE_OPAL_SORT:
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if( !HandleWord( cur, one_too_much, styler, keywordlists ) ) return;
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state = SCE_OPAL_DEFAULT;
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break;
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case SCE_OPAL_INTEGER:
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if( !HandleInteger( cur, one_too_much, styler ) ) return;
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state = SCE_OPAL_DEFAULT;
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break;
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case SCE_OPAL_COMMENT_BLOCK:
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if( !HandleCommentBlock( cur, one_too_much, styler, false ) ) return;
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state = SCE_OPAL_DEFAULT;
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break;
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case SCE_OPAL_COMMENT_LINE:
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if( !HandleCommentLine( cur, one_too_much, styler, false ) ) return;
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state = SCE_OPAL_DEFAULT;
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break;
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case SCE_OPAL_STRING:
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if( !HandleString( cur, one_too_much, styler ) ) return;
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state = SCE_OPAL_DEFAULT;
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break;
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default: // SCE_OPAL_DEFAULT:
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{
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char ch = styler.SafeGetCharAt( cur );
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switch( ch )
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{
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// String
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case '"':
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if( !HandleString( cur, one_too_much, styler ) ) return;
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break;
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// Comment block
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case '/':
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if( !HandleCommentBlock( cur, one_too_much, styler, true ) ) return;
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break;
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// Comment line
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case '-':
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if( !HandleCommentLine( cur, one_too_much, styler, true ) ) return;
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break;
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// Par
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case '(':
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case ')':
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case '[':
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case ']':
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case '{':
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case '}':
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if( !HandlePar( cur, styler ) ) return;
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break;
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// Whitespace
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case ' ':
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case '\t':
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case '\015':
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case '\012':
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if( !HandleSpace( cur, one_too_much, styler ) ) return;
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break;
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default:
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{
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// Integer
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if( isdigit( ch ) )
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{
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if( !HandleInteger( cur, one_too_much, styler ) ) return;
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}
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// Keyword
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else if( islower( ch ) || isupper( ch ) )
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{
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if( !HandleWord( cur, one_too_much, styler, keywordlists ) ) return;
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}
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// Skip
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else
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{
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if( !HandleSkip( cur, one_too_much, styler ) ) return;
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}
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}
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}
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break;
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}
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}
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}
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}
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static const char * const opalWordListDesc[] = {
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"Keywords",
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"Sorts",
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0
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};
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LexerModule lmOpal(SCLEX_OPAL, ColouriseOpalDoc, "opal", NULL, opalWordListDesc);
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