+++ /dev/null
-// Scintilla source code edit control
-/** @file LexBasic.cxx
- ** Lexer for BlitzBasic and PureBasic.
- **/
-// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
-// The License.txt file describes the conditions under which this software may be distributed.
-
-// This tries to be a unified Lexer/Folder for all the BlitzBasic/BlitzMax/PurBasic basics
-// and derivatives. Once they diverge enough, might want to split it into multiple
-// lexers for more code clearity.
-//
-// Mail me (elias <at> users <dot> sf <dot> net) for any bugs.
-
-// Folding only works for simple things like functions or types.
-
-// You may want to have a look at my ctags lexer as well, if you additionally to coloring
-// and folding need to extract things like label tags in your editor.
-
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-#include <ctype.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
-
-/* Bits:
- * 1 - whitespace
- * 2 - operator
- * 4 - identifier
- * 8 - decimal digit
- * 16 - hex digit
- * 32 - bin digit
- */
-static int character_classification[128] =
-{
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 1, 2, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 10, 2,
- 60, 60, 28, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 2, 2, 2,
- 2, 20, 20, 20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 4,
- 2, 20, 20, 20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 0
-};
-
-static bool IsSpace(int c) {
- return c < 128 && (character_classification[c] & 1);
-}
-
-static bool IsOperator(int c) {
- return c < 128 && (character_classification[c] & 2);
-}
-
-static bool IsIdentifier(int c) {
- return c < 128 && (character_classification[c] & 4);
-}
-
-static bool IsDigit(int c) {
- return c < 128 && (character_classification[c] & 8);
-}
-
-static bool IsHexDigit(int c) {
- return c < 128 && (character_classification[c] & 16);
-}
-
-static bool IsBinDigit(int c) {
- return c < 128 && (character_classification[c] & 32);
-}
-
-static int LowerCase(int c)
-{
- if (c >= 'A' && c <= 'Z')
- return 'a' + c - 'A';
- return c;
-}
-
-static void ColouriseBasicDoc(unsigned int startPos, int length, int initStyle,
- WordList *keywordlists[], Accessor &styler, char comment_char) {
- bool wasfirst = true, isfirst = true; // true if first token in a line
- styler.StartAt(startPos);
-
- StyleContext sc(startPos, length, initStyle, styler);
-
- // Can't use sc.More() here else we miss the last character
- for (; ; sc.Forward()) {
- if (sc.state == SCE_B_IDENTIFIER) {
- if (!IsIdentifier(sc.ch)) {
- // Labels
- if (wasfirst && sc.Match(':')) {
- sc.ChangeState(SCE_B_LABEL);
- sc.ForwardSetState(SCE_B_DEFAULT);
- } else {
- char s[100];
- int kstates[4] = {
- SCE_B_KEYWORD,
- SCE_B_KEYWORD2,
- SCE_B_KEYWORD3,
- SCE_B_KEYWORD4,
- };
- sc.GetCurrentLowered(s, sizeof(s));
- for (int i = 0; i < 4; i++) {
- if (keywordlists[i]->InList(s)) {
- sc.ChangeState(kstates[i]);
- }
- }
- // Types, must set them as operator else they will be
- // matched as number/constant
- if (sc.Match('.') || sc.Match('$') || sc.Match('%') ||
- sc.Match('#')) {
- sc.SetState(SCE_B_OPERATOR);
- } else {
- sc.SetState(SCE_B_DEFAULT);
- }
- }
- }
- } else if (sc.state == SCE_B_OPERATOR) {
- if (!IsOperator(sc.ch) || sc.Match('#'))
- sc.SetState(SCE_B_DEFAULT);
- } else if (sc.state == SCE_B_LABEL) {
- if (!IsIdentifier(sc.ch))
- sc.SetState(SCE_B_DEFAULT);
- } else if (sc.state == SCE_B_CONSTANT) {
- if (!IsIdentifier(sc.ch))
- sc.SetState(SCE_B_DEFAULT);
- } else if (sc.state == SCE_B_NUMBER) {
- if (!IsDigit(sc.ch))
- sc.SetState(SCE_B_DEFAULT);
- } else if (sc.state == SCE_B_HEXNUMBER) {
- if (!IsHexDigit(sc.ch))
- sc.SetState(SCE_B_DEFAULT);
- } else if (sc.state == SCE_B_BINNUMBER) {
- if (!IsBinDigit(sc.ch))
- sc.SetState(SCE_B_DEFAULT);
- } else if (sc.state == SCE_B_STRING) {
- if (sc.ch == '"') {
- sc.ForwardSetState(SCE_B_DEFAULT);
- }
- if (sc.atLineEnd) {
- sc.ChangeState(SCE_B_ERROR);
- sc.SetState(SCE_B_DEFAULT);
- }
- } else if (sc.state == SCE_B_COMMENT || sc.state == SCE_B_PREPROCESSOR) {
- if (sc.atLineEnd) {
- sc.SetState(SCE_B_DEFAULT);
- }
- }
-
- if (sc.atLineStart)
- isfirst = true;
-
- if (sc.state == SCE_B_DEFAULT || sc.state == SCE_B_ERROR) {
- if (isfirst && sc.Match('.')) {
- sc.SetState(SCE_B_LABEL);
- } else if (isfirst && sc.Match('#')) {
- wasfirst = isfirst;
- sc.SetState(SCE_B_IDENTIFIER);
- } else if (sc.Match(comment_char)) {
- // Hack to make deprecated QBASIC '$Include show
- // up in freebasic with SCE_B_PREPROCESSOR.
- if (comment_char == '\'' && sc.Match(comment_char, '$'))
- sc.SetState(SCE_B_PREPROCESSOR);
- else
- sc.SetState(SCE_B_COMMENT);
- } else if (sc.Match('"')) {
- sc.SetState(SCE_B_STRING);
- } else if (IsDigit(sc.ch)) {
- sc.SetState(SCE_B_NUMBER);
- } else if (sc.Match('$')) {
- sc.SetState(SCE_B_HEXNUMBER);
- } else if (sc.Match('%')) {
- sc.SetState(SCE_B_BINNUMBER);
- } else if (sc.Match('#')) {
- sc.SetState(SCE_B_CONSTANT);
- } else if (IsOperator(sc.ch)) {
- sc.SetState(SCE_B_OPERATOR);
- } else if (IsIdentifier(sc.ch)) {
- wasfirst = isfirst;
- sc.SetState(SCE_B_IDENTIFIER);
- } else if (!IsSpace(sc.ch)) {
- sc.SetState(SCE_B_ERROR);
- }
- }
-
- if (!IsSpace(sc.ch))
- isfirst = false;
-
- if (!sc.More())
- break;
- }
- sc.Complete();
-}
-
-static int CheckBlitzFoldPoint(char const *token, int &level) {
- if (!strcmp(token, "function") ||
- !strcmp(token, "type")) {
- level |= SC_FOLDLEVELHEADERFLAG;
- return 1;
- }
- if (!strcmp(token, "end function") ||
- !strcmp(token, "end type")) {
- return -1;
- }
- return 0;
-}
-
-static int CheckPureFoldPoint(char const *token, int &level) {
- if (!strcmp(token, "procedure") ||
- !strcmp(token, "enumeration") ||
- !strcmp(token, "interface") ||
- !strcmp(token, "structure")) {
- level |= SC_FOLDLEVELHEADERFLAG;
- return 1;
- }
- if (!strcmp(token, "endprocedure") ||
- !strcmp(token, "endenumeration") ||
- !strcmp(token, "endinterface") ||
- !strcmp(token, "endstructure")) {
- return -1;
- }
- return 0;
-}
-
-static int CheckFreeFoldPoint(char const *token, int &level) {
- if (!strcmp(token, "function") ||
- !strcmp(token, "sub") ||
- !strcmp(token, "type")) {
- level |= SC_FOLDLEVELHEADERFLAG;
- return 1;
- }
- if (!strcmp(token, "end function") ||
- !strcmp(token, "end sub") ||
- !strcmp(token, "end type")) {
- return -1;
- }
- return 0;
-}
-
-static void FoldBasicDoc(unsigned int startPos, int length,
- Accessor &styler, int (*CheckFoldPoint)(char const *, int &)) {
- int line = styler.GetLine(startPos);
- int level = styler.LevelAt(line);
- int go = 0, done = 0;
- int endPos = startPos + length;
- char word[256];
- int wordlen = 0;
- int i;
- bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
- // Scan for tokens at the start of the line (they may include
- // whitespace, for tokens like "End Function"
- for (i = startPos; i < endPos; i++) {
- int c = styler.SafeGetCharAt(i);
- if (!done && !go) {
- if (wordlen) { // are we scanning a token already?
- word[wordlen] = static_cast<char>(LowerCase(c));
- if (!IsIdentifier(c)) { // done with token
- word[wordlen] = '\0';
- go = CheckFoldPoint(word, level);
- if (!go) {
- // Treat any whitespace as single blank, for
- // things like "End Function".
- if (IsSpace(c) && IsIdentifier(word[wordlen - 1])) {
- word[wordlen] = ' ';
- if (wordlen < 255)
- wordlen++;
- }
- else // done with this line
- done = 1;
- }
- } else if (wordlen < 255) {
- wordlen++;
- }
- } else { // start scanning at first non-whitespace character
- if (!IsSpace(c)) {
- if (IsIdentifier(c)) {
- word[0] = static_cast<char>(LowerCase(c));
- wordlen = 1;
- } else // done with this line
- done = 1;
- }
- }
- }
- if (c == '\n') { // line end
- if (!done && wordlen == 0 && foldCompact) // line was only space
- level |= SC_FOLDLEVELWHITEFLAG;
- if (level != styler.LevelAt(line))
- styler.SetLevel(line, level);
- level += go;
- line++;
- // reset state
- wordlen = 0;
- level &= ~SC_FOLDLEVELHEADERFLAG;
- level &= ~SC_FOLDLEVELWHITEFLAG;
- go = 0;
- done = 0;
- }
- }
-}
-
-static void ColouriseBlitzBasicDoc(unsigned int startPos, int length, int initStyle,
- WordList *keywordlists[], Accessor &styler) {
- ColouriseBasicDoc(startPos, length, initStyle, keywordlists, styler, ';');
-}
-
-static void ColourisePureBasicDoc(unsigned int startPos, int length, int initStyle,
- WordList *keywordlists[], Accessor &styler) {
- ColouriseBasicDoc(startPos, length, initStyle, keywordlists, styler, ';');
-}
-
-static void ColouriseFreeBasicDoc(unsigned int startPos, int length, int initStyle,
- WordList *keywordlists[], Accessor &styler) {
- ColouriseBasicDoc(startPos, length, initStyle, keywordlists, styler, '\'');
-}
-
-static void FoldBlitzBasicDoc(unsigned int startPos, int length, int,
- WordList *[], Accessor &styler) {
- FoldBasicDoc(startPos, length, styler, CheckBlitzFoldPoint);
-}
-
-static void FoldPureBasicDoc(unsigned int startPos, int length, int,
- WordList *[], Accessor &styler) {
- FoldBasicDoc(startPos, length, styler, CheckPureFoldPoint);
-}
-
-static void FoldFreeBasicDoc(unsigned int startPos, int length, int,
- WordList *[], Accessor &styler) {
- FoldBasicDoc(startPos, length, styler, CheckFreeFoldPoint);
-}
-
-static const char * const blitzbasicWordListDesc[] = {
- "BlitzBasic Keywords",
- "user1",
- "user2",
- "user3",
- 0
-};
-
-static const char * const purebasicWordListDesc[] = {
- "PureBasic Keywords",
- "PureBasic PreProcessor Keywords",
- "user defined 1",
- "user defined 2",
- 0
-};
-
-static const char * const freebasicWordListDesc[] = {
- "FreeBasic Keywords",
- "FreeBasic PreProcessor Keywords",
- "user defined 1",
- "user defined 2",
- 0
-};
-
-LexerModule lmBlitzBasic(SCLEX_BLITZBASIC, ColouriseBlitzBasicDoc, "blitzbasic",
- FoldBlitzBasicDoc, blitzbasicWordListDesc);
-
-LexerModule lmPureBasic(SCLEX_PUREBASIC, ColourisePureBasicDoc, "purebasic",
- FoldPureBasicDoc, purebasicWordListDesc);
-
-LexerModule lmFreeBasic(SCLEX_FREEBASIC, ColouriseFreeBasicDoc, "freebasic",
- FoldFreeBasicDoc, freebasicWordListDesc);
-
projects / wxWidgets.git / blobdiff