diff options
Diffstat (limited to 'scintilla/src/LexCOBOL.cxx')
| -rw-r--r-- | scintilla/src/LexCOBOL.cxx | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/scintilla/src/LexCOBOL.cxx b/scintilla/src/LexCOBOL.cxx new file mode 100644 index 0000000..eee1fd4 --- /dev/null +++ b/scintilla/src/LexCOBOL.cxx @@ -0,0 +1,368 @@ +// Scintilla source code edit control
+/** @file LexCOBOL.cxx
+ ** Lexer for COBOL
+ ** Based on LexPascal.cxx
+ ** Written by Laurent le Tynevez
+ ** Updated by Simon Steele <s.steele@pnotepad.org> September 2002
+ ** Updated by Mathias Rauen <scite@madshi.net> May 2003 (Delphi adjustments)
+ ** Updated by Rod Falck, Aug 2006 Converted to COBOL
+ **/
+
+#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 "KeyWords.h"
+#include "Scintilla.h"
+#include "SciLexer.h"
+#include "StyleContext.h"
+
+#ifdef SCI_NAMESPACE
+using namespace Scintilla;
+#endif
+
+#define IN_DIVISION 0x01
+#define IN_DECLARATIVES 0x02
+#define IN_SECTION 0x04
+#define IN_PARAGRAPH 0x08
+#define IN_FLAGS 0xF
+#define NOT_HEADER 0x10
+
+inline bool isCOBOLoperator(char ch)
+ {
+ return isoperator(ch);
+ }
+
+inline bool isCOBOLwordchar(char ch)
+ {
+ return isascii(ch) && (isalnum(ch) || ch == '-');
+
+ }
+
+inline bool isCOBOLwordstart(char ch)
+ {
+ return isascii(ch) && isalnum(ch);
+ }
+
+static int CountBits(int nBits)
+ {
+ int count = 0;
+ for (int i = 0; i < 32; ++i)
+ {
+ count += nBits & 1;
+ nBits >>= 1;
+ }
+ return count;
+ }
+
+static void getRange(unsigned int start,
+ unsigned int end,
+ Accessor &styler,
+ char *s,
+ unsigned int len) {
+ unsigned int i = 0;
+ while ((i < end - start + 1) && (i < len-1)) {
+ s[i] = static_cast<char>(tolower(styler[start + i]));
+ i++;
+ }
+ s[i] = '\0';
+}
+
+static void ColourTo(Accessor &styler, unsigned int end, unsigned int attr) {
+ styler.ColourTo(end, attr);
+}
+
+
+static int classifyWordCOBOL(unsigned int start, unsigned int end, /*WordList &keywords*/WordList *keywordlists[], Accessor &styler, int nContainment, bool *bAarea) {
+ int ret = 0;
+
+ WordList& a_keywords = *keywordlists[0];
+ WordList& b_keywords = *keywordlists[1];
+ WordList& c_keywords = *keywordlists[2];
+
+ char s[100];
+ getRange(start, end, styler, s, sizeof(s));
+
+ char chAttr = SCE_C_IDENTIFIER;
+ if (isdigit(s[0]) || (s[0] == '.')) {
+ chAttr = SCE_C_NUMBER;
+ char *p = s + 1;
+ while (*p) {
+ if (!isdigit(*p) && isCOBOLwordchar(*p)) {
+ chAttr = SCE_C_IDENTIFIER;
+ break;
+ }
+ ++p;
+ }
+ }
+ else {
+ if (a_keywords.InList(s)) {
+ chAttr = SCE_C_WORD;
+ }
+ else if (b_keywords.InList(s)) {
+ chAttr = SCE_C_WORD2;
+ }
+ else if (c_keywords.InList(s)) {
+ chAttr = SCE_C_UUID;
+ }
+ }
+ if (*bAarea) {
+ if (strcmp(s, "division") == 0) {
+ ret = IN_DIVISION;
+ // we've determined the containment, anything else is just ignored for those purposes
+ *bAarea = false;
+ } else if (strcmp(s, "declaratives") == 0) {
+ ret = IN_DIVISION | IN_DECLARATIVES;
+ if (nContainment & IN_DECLARATIVES)
+ ret |= NOT_HEADER | IN_SECTION;
+ // we've determined the containment, anything else is just ignored for those purposes
+ *bAarea = false;
+ } else if (strcmp(s, "section") == 0) {
+ ret = (nContainment &~ IN_PARAGRAPH) | IN_SECTION;
+ // we've determined the containment, anything else is just ignored for those purposes
+ *bAarea = false;
+ } else if (strcmp(s, "end") == 0 && (nContainment & IN_DECLARATIVES)) {
+ ret = IN_DIVISION | IN_DECLARATIVES | IN_SECTION | NOT_HEADER;
+ } else {
+ ret = nContainment | IN_PARAGRAPH;
+ }
+ }
+ ColourTo(styler, end, chAttr);
+ return ret;
+}
+
+static void ColouriseCOBOLDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
+ Accessor &styler) {
+
+ styler.StartAt(startPos);
+
+ int state = initStyle;
+ if (state == SCE_C_CHARACTER) // Does not leak onto next line
+ state = SCE_C_DEFAULT;
+ char chPrev = ' ';
+ char chNext = styler[startPos];
+ unsigned int lengthDoc = startPos + length;
+
+ int nContainment;
+
+ int currentLine = styler.GetLine(startPos);
+ if (currentLine > 0) {
+ styler.SetLineState(currentLine, styler.GetLineState(currentLine-1));
+ nContainment = styler.GetLineState(currentLine);
+ nContainment &= ~NOT_HEADER;
+ } else {
+ styler.SetLineState(currentLine, 0);
+ nContainment = 0;
+ }
+
+ styler.StartSegment(startPos);
+ bool bNewLine = true;
+ bool bAarea = !isspacechar(chNext);
+ int column = 0;
+ for (unsigned int i = startPos; i < lengthDoc; i++) {
+ char ch = chNext;
+
+ chNext = styler.SafeGetCharAt(i + 1);
+
+ ++column;
+
+ if (bNewLine) {
+ column = 0;
+ }
+ if (column <= 1 && !bAarea) {
+ bAarea = !isspacechar(ch);
+ }
+ bool bSetNewLine = false;
+ if ((ch == '\r' && chNext != '\n') || (ch == '\n')) {
+ // Trigger on CR only (Mac style) or either on LF from CR+LF (Dos/Win) or on LF alone (Unix)
+ // Avoid triggering two times on Dos/Win
+ // End of line
+ if (state == SCE_C_CHARACTER) {
+ ColourTo(styler, i, state);
+ state = SCE_C_DEFAULT;
+ }
+ styler.SetLineState(currentLine, nContainment);
+ currentLine++;
+ bSetNewLine = true;
+ if (nContainment & NOT_HEADER)
+ nContainment &= ~(NOT_HEADER | IN_DECLARATIVES | IN_SECTION);
+ }
+
+ if (styler.IsLeadByte(ch)) {
+ chNext = styler.SafeGetCharAt(i + 2);
+ chPrev = ' ';
+ i += 1;
+ continue;
+ }
+
+ if (state == SCE_C_DEFAULT) {
+ if (isCOBOLwordstart(ch) || (ch == '$' && isascii(chNext) && isalpha(chNext))) {
+ ColourTo(styler, i-1, state);
+ state = SCE_C_IDENTIFIER;
+ } else if (column == 0 && ch == '*' && chNext != '*') {
+ ColourTo(styler, i-1, state);
+ state = SCE_C_COMMENTLINE;
+ } else if (column == 0 && ch == '/' && chNext != '*') {
+ ColourTo(styler, i-1, state);
+ state = SCE_C_COMMENTLINE;
+ } else if (column == 0 && ch == '*' && chNext == '*') {
+ ColourTo(styler, i-1, state);
+ state = SCE_C_COMMENTDOC;
+ } else if (column == 0 && ch == '/' && chNext == '*') {
+ ColourTo(styler, i-1, state);
+ state = SCE_C_COMMENTDOC;
+ } else if (ch == '"') {
+ ColourTo(styler, i-1, state);
+ state = SCE_C_STRING;
+ } else if (ch == '\'') {
+ ColourTo(styler, i-1, state);
+ state = SCE_C_CHARACTER;
+ } else if (ch == '?' && column == 0) {
+ ColourTo(styler, i-1, state);
+ state = SCE_C_PREPROCESSOR;
+ } else if (isCOBOLoperator(ch)) {
+ ColourTo(styler, i-1, state);
+ ColourTo(styler, i, SCE_C_OPERATOR);
+ }
+ } else if (state == SCE_C_IDENTIFIER) {
+ if (!isCOBOLwordchar(ch)) {
+ int lStateChange = classifyWordCOBOL(styler.GetStartSegment(), i - 1, keywordlists, styler, nContainment, &bAarea);
+
+ if(lStateChange != 0) {
+ styler.SetLineState(currentLine, lStateChange);
+ nContainment = lStateChange;
+ }
+
+ state = SCE_C_DEFAULT;
+ chNext = styler.SafeGetCharAt(i + 1);
+ if (ch == '"') {
+ state = SCE_C_STRING;
+ } else if (ch == '\'') {
+ state = SCE_C_CHARACTER;
+ } else if (isCOBOLoperator(ch)) {
+ ColourTo(styler, i, SCE_C_OPERATOR);
+ }
+ }
+ } else {
+ if (state == SCE_C_PREPROCESSOR) {
+ if ((ch == '\r' || ch == '\n') && !(chPrev == '\\' || chPrev == '\r')) {
+ ColourTo(styler, i-1, state);
+ state = SCE_C_DEFAULT;
+ }
+ } else if (state == SCE_C_COMMENT) {
+ if (ch == '\r' || ch == '\n') {
+ ColourTo(styler, i, state);
+ state = SCE_C_DEFAULT;
+ }
+ } else if (state == SCE_C_COMMENTDOC) {
+ if (ch == '\r' || ch == '\n') {
+ if (((i > styler.GetStartSegment() + 2) || (
+ (initStyle == SCE_C_COMMENTDOC) &&
+ (styler.GetStartSegment() == static_cast<unsigned int>(startPos))))) {
+ ColourTo(styler, i, state);
+ state = SCE_C_DEFAULT;
+ }
+ }
+ } else if (state == SCE_C_COMMENTLINE) {
+ if (ch == '\r' || ch == '\n') {
+ ColourTo(styler, i-1, state);
+ state = SCE_C_DEFAULT;
+ }
+ } else if (state == SCE_C_STRING) {
+ if (ch == '"') {
+ ColourTo(styler, i, state);
+ state = SCE_C_DEFAULT;
+ }
+ } else if (state == SCE_C_CHARACTER) {
+ if (ch == '\'') {
+ ColourTo(styler, i, state);
+ state = SCE_C_DEFAULT;
+ }
+ }
+ }
+ chPrev = ch;
+ bNewLine = bSetNewLine;
+ if (bNewLine)
+ {
+ bAarea = false;
+ }
+ }
+ ColourTo(styler, lengthDoc - 1, state);
+}
+
+static void FoldCOBOLDoc(unsigned int startPos, int length, int, WordList *[],
+ Accessor &styler) {
+ bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
+ unsigned int endPos = startPos + length;
+ int visibleChars = 0;
+ int lineCurrent = styler.GetLine(startPos);
+ int levelPrev = lineCurrent > 0 ? styler.LevelAt(lineCurrent - 1) & SC_FOLDLEVELNUMBERMASK : 0xFFF;
+ char chNext = styler[startPos];
+
+ bool bNewLine = true;
+ bool bAarea = !isspacechar(chNext);
+ int column = 0;
+ bool bComment = false;
+ for (unsigned int i = startPos; i < endPos; i++) {
+ char ch = chNext;
+ chNext = styler.SafeGetCharAt(i + 1);
+ ++column;
+
+ if (bNewLine) {
+ column = 0;
+ bComment = (ch == '*' || ch == '/' || ch == '?');
+ }
+ if (column <= 1 && !bAarea) {
+ bAarea = !isspacechar(ch);
+ }
+ bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
+ if (atEOL) {
+ int nContainment = styler.GetLineState(lineCurrent);
+ int lev = CountBits(nContainment & IN_FLAGS) | SC_FOLDLEVELBASE;
+ if (bAarea && !bComment)
+ --lev;
+ if (visibleChars == 0 && foldCompact)
+ lev |= SC_FOLDLEVELWHITEFLAG;
+ if ((bAarea) && (visibleChars > 0) && !(nContainment & NOT_HEADER) && !bComment)
+ lev |= SC_FOLDLEVELHEADERFLAG;
+ if (lev != styler.LevelAt(lineCurrent)) {
+ styler.SetLevel(lineCurrent, lev);
+ }
+ if ((lev & SC_FOLDLEVELNUMBERMASK) <= (levelPrev & SC_FOLDLEVELNUMBERMASK)) {
+ // this level is at the same level or less than the previous line
+ // therefore these is nothing for the previous header to collapse, so remove the header
+ styler.SetLevel(lineCurrent - 1, levelPrev & ~SC_FOLDLEVELHEADERFLAG);
+ }
+ levelPrev = lev;
+ visibleChars = 0;
+ bAarea = false;
+ bNewLine = true;
+ lineCurrent++;
+ } else {
+ bNewLine = false;
+ }
+
+
+ if (!isspacechar(ch))
+ visibleChars++;
+ }
+
+ // Fill in the real level of the next line, keeping the current flags as they will be filled in later
+ int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
+ styler.SetLevel(lineCurrent, levelPrev | flagsNext);
+}
+
+static const char * const COBOLWordListDesc[] = {
+ "A Keywords",
+ "B Keywords",
+ "Extended Keywords",
+ 0
+};
+
+LexerModule lmCOBOL(SCLEX_COBOL, ColouriseCOBOLDoc, "COBOL", FoldCOBOLDoc, COBOLWordListDesc);
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