146 lines
4.3 KiB
C++
146 lines
4.3 KiB
C++
// Scintilla source code edit control
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/** @file LexMake.cxx
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** Lexer for make files.
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**/
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// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
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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 <string>
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#include <string_view>
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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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using namespace Lexilla;
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static inline bool AtEOL(Accessor &styler, Sci_PositionU i) {
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return (styler[i] == '\n') ||
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((styler[i] == '\r') && (styler.SafeGetCharAt(i + 1) != '\n'));
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}
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static void ColouriseMakeLine(
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char *lineBuffer,
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Sci_PositionU lengthLine,
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Sci_PositionU startLine,
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Sci_PositionU endPos,
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Accessor &styler) {
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Sci_PositionU i = 0;
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Sci_Position lastNonSpace = -1;
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unsigned int state = SCE_MAKE_DEFAULT;
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bool bSpecial = false;
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// check for a tab character in column 0 indicating a command
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bool bCommand = false;
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if ((lengthLine > 0) && (lineBuffer[0] == '\t'))
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bCommand = true;
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// Skip initial spaces
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while ((i < lengthLine) && isspacechar(lineBuffer[i])) {
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i++;
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}
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if (i < lengthLine) {
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if (lineBuffer[i] == '#') { // Comment
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styler.ColourTo(endPos, SCE_MAKE_COMMENT);
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return;
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}
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if (lineBuffer[i] == '!') { // Special directive
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styler.ColourTo(endPos, SCE_MAKE_PREPROCESSOR);
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return;
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}
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}
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int varCount = 0;
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while (i < lengthLine) {
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if (((i + 1) < lengthLine) && (lineBuffer[i] == '$' && lineBuffer[i + 1] == '(')) {
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styler.ColourTo(startLine + i - 1, state);
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state = SCE_MAKE_IDENTIFIER;
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varCount++;
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} else if (state == SCE_MAKE_IDENTIFIER && lineBuffer[i] == ')') {
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if (--varCount == 0) {
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styler.ColourTo(startLine + i, state);
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state = SCE_MAKE_DEFAULT;
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}
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}
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// skip identifier and target styling if this is a command line
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if (!bSpecial && !bCommand) {
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if (lineBuffer[i] == ':') {
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if (((i + 1) < lengthLine) && (lineBuffer[i + 1] == '=')) {
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// it's a ':=', so style as an identifier
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if (lastNonSpace >= 0)
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styler.ColourTo(startLine + lastNonSpace, SCE_MAKE_IDENTIFIER);
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styler.ColourTo(startLine + i - 1, SCE_MAKE_DEFAULT);
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styler.ColourTo(startLine + i + 1, SCE_MAKE_OPERATOR);
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} else {
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// We should check that no colouring was made since the beginning of the line,
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// to avoid colouring stuff like /OUT:file
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if (lastNonSpace >= 0)
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styler.ColourTo(startLine + lastNonSpace, SCE_MAKE_TARGET);
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styler.ColourTo(startLine + i - 1, SCE_MAKE_DEFAULT);
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styler.ColourTo(startLine + i, SCE_MAKE_OPERATOR);
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}
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bSpecial = true; // Only react to the first ':' of the line
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state = SCE_MAKE_DEFAULT;
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} else if (lineBuffer[i] == '=') {
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if (lastNonSpace >= 0)
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styler.ColourTo(startLine + lastNonSpace, SCE_MAKE_IDENTIFIER);
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styler.ColourTo(startLine + i - 1, SCE_MAKE_DEFAULT);
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styler.ColourTo(startLine + i, SCE_MAKE_OPERATOR);
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bSpecial = true; // Only react to the first '=' of the line
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state = SCE_MAKE_DEFAULT;
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}
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}
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if (!isspacechar(lineBuffer[i])) {
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lastNonSpace = i;
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}
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i++;
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}
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if (state == SCE_MAKE_IDENTIFIER) {
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styler.ColourTo(endPos, SCE_MAKE_IDEOL); // Error, variable reference not ended
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} else {
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styler.ColourTo(endPos, SCE_MAKE_DEFAULT);
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}
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}
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static void ColouriseMakeDoc(Sci_PositionU startPos, Sci_Position length, int, WordList *[], Accessor &styler) {
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char lineBuffer[1024];
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styler.StartAt(startPos);
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styler.StartSegment(startPos);
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Sci_PositionU linePos = 0;
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Sci_PositionU startLine = startPos;
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for (Sci_PositionU i = startPos; i < startPos + length; i++) {
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lineBuffer[linePos++] = styler[i];
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if (AtEOL(styler, i) || (linePos >= sizeof(lineBuffer) - 1)) {
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// End of line (or of line buffer) met, colourise it
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lineBuffer[linePos] = '\0';
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ColouriseMakeLine(lineBuffer, linePos, startLine, i, styler);
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linePos = 0;
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startLine = i + 1;
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}
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}
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if (linePos > 0) { // Last line does not have ending characters
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ColouriseMakeLine(lineBuffer, linePos, startLine, startPos + length - 1, styler);
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}
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}
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static const char *const emptyWordListDesc[] = {
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0
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};
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LexerModule lmMake(SCLEX_MAKEFILE, ColouriseMakeDoc, "makefile", 0, emptyWordListDesc);
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