diff options
Diffstat (limited to 'scintilla/src/LexForth.cxx')
| -rw-r--r-- | scintilla/src/LexForth.cxx | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/scintilla/src/LexForth.cxx b/scintilla/src/LexForth.cxx new file mode 100644 index 0000000..6365f6c --- /dev/null +++ b/scintilla/src/LexForth.cxx @@ -0,0 +1,176 @@ +// Scintilla source code edit control
+/** @file LexForth.cxx
+ ** Lexer for FORTH
+ **/
+// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
+// 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
+
+static inline bool IsAWordChar(int ch) {
+ return (ch < 0x80) && (isalnum(ch) || ch == '.' ||
+ ch == '_' || ch == '?' || ch == '"' || ch == '@' ||
+ ch == '!' || ch == '[' || ch == ']' || ch == '/' ||
+ ch == '+' || ch == '-' || ch == '*' || ch == '<' ||
+ ch == '>' || ch == '=' || ch == ';' || ch == '(' ||
+ ch == ')' );
+}
+
+static inline bool IsAWordStart(int ch) {
+ return (ch < 0x80) && (isalnum(ch) || ch == '_' || ch == '.');
+}
+
+static inline bool IsANumChar(int ch) {
+ return (ch < 0x80) && (isxdigit(ch) || ch == '.' || ch == 'e' || ch == 'E' );
+}
+
+static inline bool IsASpaceChar(int ch) {
+ return (ch < 0x80) && isspace(ch);
+}
+
+static void ColouriseForthDoc(unsigned int startPos, int length, int initStyle, WordList *keywordLists[],
+ Accessor &styler) {
+
+ WordList &control = *keywordLists[0];
+ WordList &keyword = *keywordLists[1];
+ WordList &defword = *keywordLists[2];
+ WordList &preword1 = *keywordLists[3];
+ WordList &preword2 = *keywordLists[4];
+ WordList &strings = *keywordLists[5];
+
+ StyleContext sc(startPos, length, initStyle, styler);
+
+ for (; sc.More(); sc.Forward())
+ {
+ // Determine if the current state should terminate.
+ if (sc.state == SCE_FORTH_COMMENT) {
+ if (sc.atLineEnd) {
+ sc.SetState(SCE_FORTH_DEFAULT);
+ }
+ }else if (sc.state == SCE_FORTH_COMMENT_ML) {
+ if (sc.ch == ')') {
+ sc.ForwardSetState(SCE_FORTH_DEFAULT);
+ }
+ }else if (sc.state == SCE_FORTH_IDENTIFIER || sc.state == SCE_FORTH_NUMBER) {
+ // handle numbers here too, because what we thought was a number might
+ // turn out to be a keyword e.g. 2DUP
+ if (IsASpaceChar(sc.ch) ) {
+ char s[100];
+ sc.GetCurrentLowered(s, sizeof(s));
+ int newState = sc.state == SCE_FORTH_NUMBER ? SCE_FORTH_NUMBER : SCE_FORTH_DEFAULT;
+ if (control.InList(s)) {
+ sc.ChangeState(SCE_FORTH_CONTROL);
+ } else if (keyword.InList(s)) {
+ sc.ChangeState(SCE_FORTH_KEYWORD);
+ } else if (defword.InList(s)) {
+ sc.ChangeState(SCE_FORTH_DEFWORD);
+ } else if (preword1.InList(s)) {
+ sc.ChangeState(SCE_FORTH_PREWORD1);
+ } else if (preword2.InList(s)) {
+ sc.ChangeState(SCE_FORTH_PREWORD2);
+ } else if (strings.InList(s)) {
+ sc.ChangeState(SCE_FORTH_STRING);
+ newState = SCE_FORTH_STRING;
+ }
+ sc.SetState(newState);
+ }
+ if (sc.state == SCE_FORTH_NUMBER) {
+ if (IsASpaceChar(sc.ch)) {
+ sc.SetState(SCE_FORTH_DEFAULT);
+ } else if (!IsANumChar(sc.ch)) {
+ sc.ChangeState(SCE_FORTH_IDENTIFIER);
+ }
+ }
+ }else if (sc.state == SCE_FORTH_STRING) {
+ if (sc.ch == '\"') {
+ sc.ForwardSetState(SCE_FORTH_DEFAULT);
+ }
+ }else if (sc.state == SCE_FORTH_LOCALE) {
+ if (sc.ch == '}') {
+ sc.ForwardSetState(SCE_FORTH_DEFAULT);
+ }
+ }else if (sc.state == SCE_FORTH_DEFWORD) {
+ if (IsASpaceChar(sc.ch)) {
+ sc.SetState(SCE_FORTH_DEFAULT);
+ }
+ }
+
+ // Determine if a new state should be entered.
+ if (sc.state == SCE_FORTH_DEFAULT) {
+ if (sc.ch == '\\'){
+ sc.SetState(SCE_FORTH_COMMENT);
+ } else if (sc.ch == '(' &&
+ (sc.atLineStart || IsASpaceChar(sc.chPrev)) &&
+ (sc.atLineEnd || IsASpaceChar(sc.chNext))) {
+ sc.SetState(SCE_FORTH_COMMENT_ML);
+ } else if ( (sc.ch == '$' && (isascii(sc.chNext) && isxdigit(sc.chNext))) ) {
+ // number starting with $ is a hex number
+ sc.SetState(SCE_FORTH_NUMBER);
+ while(sc.More() && isascii(sc.chNext) && isxdigit(sc.chNext))
+ sc.Forward();
+ } else if ( (sc.ch == '%' && (isascii(sc.chNext) && (sc.chNext == '0' || sc.chNext == '1'))) ) {
+ // number starting with % is binary
+ sc.SetState(SCE_FORTH_NUMBER);
+ while(sc.More() && isascii(sc.chNext) && (sc.chNext == '0' || sc.chNext == '1'))
+ sc.Forward();
+ } else if ( isascii(sc.ch) &&
+ (isxdigit(sc.ch) || ((sc.ch == '.' || sc.ch == '-') && isascii(sc.chNext) && isxdigit(sc.chNext)) )
+ ){
+ sc.SetState(SCE_FORTH_NUMBER);
+ } else if (IsAWordStart(sc.ch)) {
+ sc.SetState(SCE_FORTH_IDENTIFIER);
+ } else if (sc.ch == '{') {
+ sc.SetState(SCE_FORTH_LOCALE);
+ } else if (sc.ch == ':' && isascii(sc.chNext) && isspace(sc.chNext)) {
+ // highlight word definitions e.g. : GCD ( n n -- n ) ..... ;
+ // ^ ^^^
+ sc.SetState(SCE_FORTH_DEFWORD);
+ while(sc.More() && isascii(sc.chNext) && isspace(sc.chNext))
+ sc.Forward();
+ } else if (sc.ch == ';' &&
+ (sc.atLineStart || IsASpaceChar(sc.chPrev)) &&
+ (sc.atLineEnd || IsASpaceChar(sc.chNext)) ) {
+ // mark the ';' that ends a word
+ sc.SetState(SCE_FORTH_DEFWORD);
+ sc.ForwardSetState(SCE_FORTH_DEFAULT);
+ }
+ }
+
+ }
+ sc.Complete();
+}
+
+static void FoldForthDoc(unsigned int, int, int, WordList *[],
+ Accessor &) {
+}
+
+static const char * const forthWordLists[] = {
+ "control keywords",
+ "keywords",
+ "definition words",
+ "prewords with one argument",
+ "prewords with two arguments",
+ "string definition keywords",
+ 0,
+ };
+
+LexerModule lmForth(SCLEX_FORTH, ColouriseForthDoc, "forth", FoldForthDoc, forthWordLists);
+
+
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