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