209 lines
4.7 KiB
C++
209 lines
4.7 KiB
C++
// Scintilla source code edit control
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/** @file LexSorcus.cxx
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** Lexer for SORCUS installation files
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** Written by Eugen Bitter and Christoph Baumann at SORCUS Computer, Heidelberg Germany
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** Based on the ASM Lexer by The Black Horus
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**/
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// The License.txt file describes the conditions under which this software may be distributed.
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <ctype.h>
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#include "ILexer.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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#include "WordList.h"
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#include "LexAccessor.h"
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#include "Accessor.h"
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#include "StyleContext.h"
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#include "CharacterSet.h"
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#include "LexerModule.h"
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#ifdef SCI_NAMESPACE
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using namespace Scintilla;
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#endif
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//each character a..z and A..Z + '_' can be part of a keyword
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//additionally numbers that follow 'M' can be contained in a keyword
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static inline bool IsSWordStart(const int ch, const int prev_ch)
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{
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if (isalpha(ch) || (ch == '_') || ((isdigit(ch)) && (prev_ch == 'M')))
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return true;
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return false;
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}
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//only digits that are not preceded by 'M' count as a number
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static inline bool IsSorcusNumber(const int ch, const int prev_ch)
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{
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if ((isdigit(ch)) && (prev_ch != 'M'))
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return true;
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return false;
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}
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//only = is a valid operator
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static inline bool IsSorcusOperator(const int ch)
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{
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if (ch == '=')
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return true;
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return false;
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}
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static void ColouriseSorcusDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
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Accessor &styler)
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{
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WordList &Command = *keywordlists[0];
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WordList &Parameter = *keywordlists[1];
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WordList &Constant = *keywordlists[2];
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// Do not leak onto next line
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if (initStyle == SCE_SORCUS_STRINGEOL)
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initStyle = SCE_SORCUS_DEFAULT;
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StyleContext sc(startPos, length, initStyle, styler);
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for (; sc.More(); sc.Forward())
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{
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// Prevent SCE_SORCUS_STRINGEOL from leaking back to previous line
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if (sc.atLineStart && (sc.state == SCE_SORCUS_STRING))
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{
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sc.SetState(SCE_SORCUS_STRING);
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}
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// Determine if the current state should terminate.
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if (sc.state == SCE_SORCUS_OPERATOR)
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{
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if (!IsSorcusOperator(sc.ch))
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{
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sc.SetState(SCE_SORCUS_DEFAULT);
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}
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}
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else if(sc.state == SCE_SORCUS_NUMBER)
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{
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if(!IsSorcusNumber(sc.ch, sc.chPrev))
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{
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sc.SetState(SCE_SORCUS_DEFAULT);
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}
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}
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else if (sc.state == SCE_SORCUS_IDENTIFIER)
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{
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if (!IsSWordStart(sc.ch, sc.chPrev))
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{
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char s[100];
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sc.GetCurrent(s, sizeof(s));
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if (Command.InList(s))
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{
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sc.ChangeState(SCE_SORCUS_COMMAND);
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}
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else if (Parameter.InList(s))
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{
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sc.ChangeState(SCE_SORCUS_PARAMETER);
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}
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else if (Constant.InList(s))
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{
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sc.ChangeState(SCE_SORCUS_CONSTANT);
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}
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sc.SetState(SCE_SORCUS_DEFAULT);
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}
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}
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else if (sc.state == SCE_SORCUS_COMMENTLINE )
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{
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if (sc.atLineEnd)
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{
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sc.SetState(SCE_SORCUS_DEFAULT);
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}
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}
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else if (sc.state == SCE_SORCUS_STRING)
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{
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if (sc.ch == '\"')
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{
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sc.ForwardSetState(SCE_SORCUS_DEFAULT);
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}
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else if (sc.atLineEnd)
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{
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sc.ChangeState(SCE_SORCUS_STRINGEOL);
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sc.ForwardSetState(SCE_SORCUS_DEFAULT);
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}
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}
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// Determine if a new state should be entered.
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if (sc.state == SCE_SORCUS_DEFAULT)
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{
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if ((sc.ch == ';') || (sc.ch == '\''))
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{
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sc.SetState(SCE_SORCUS_COMMENTLINE);
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}
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else if (IsSWordStart(sc.ch, sc.chPrev))
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{
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sc.SetState(SCE_SORCUS_IDENTIFIER);
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}
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else if (sc.ch == '\"')
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{
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sc.SetState(SCE_SORCUS_STRING);
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}
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else if (IsSorcusOperator(sc.ch))
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{
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sc.SetState(SCE_SORCUS_OPERATOR);
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}
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else if (IsSorcusNumber(sc.ch, sc.chPrev))
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{
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sc.SetState(SCE_SORCUS_NUMBER);
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}
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}
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}
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sc.Complete();
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}
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static const char* const SorcusWordListDesc[] = {"Command","Parameter", "Constant", 0};
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LexerModule lmSorc(SCLEX_SORCUS, ColouriseSorcusDoc, "sorcins", 0, SorcusWordListDesc);
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