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notepad-plus-plus/lexilla/lexers/LexCOBOL.cxx

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// 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 <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <ctype.h>
#include <string>
#include <string_view>
#include "ILexer.h"
#include "Scintilla.h"
#include "SciLexer.h"
#include "WordList.h"
#include "LexAccessor.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "CharacterSet.h"
#include "LexerModule.h"
using namespace Lexilla;
#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(Sci_PositionU start,
Sci_PositionU end,
Accessor &styler,
char *s,
Sci_PositionU len) {
Sci_PositionU 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, Sci_PositionU end, unsigned int attr) {
styler.ColourTo(end, attr);
}
static int classifyWordCOBOL(Sci_PositionU start, Sci_PositionU end, /*WordList &keywords*/WordList *keywordlists[], Accessor &styler, int nContainment, bool *bAarea) {
int ret = 0;
char s[100];
s[0] = '\0';
s[1] = '\0';
getRange(start, end, styler, s, sizeof(s));
int chAttr = SCE_C_IDENTIFIER;
if (isdigit(s[0]) || (s[0] == '.') || (s[0] == 'v')) {
chAttr = SCE_C_NUMBER;
char *p = s + 1;
while (*p) {
if ((!isdigit(*p) && (*p) != 'v') && isCOBOLwordchar(*p)) {
chAttr = SCE_C_IDENTIFIER;
break;
}
++p;
}
}
if (chAttr == SCE_C_IDENTIFIER) {
WordList& a_keywords = *keywordlists[0];
WordList& b_keywords = *keywordlists[1];
WordList& c_keywords = *keywordlists[2];
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(Sci_PositionU startPos, Sci_Position 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];
Sci_PositionU lengthDoc = startPos + length;
int nContainment;
Sci_Position 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 (Sci_PositionU 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 == 6 && (ch == '*' || ch == '/')) {
// Cobol comment line: asterisk in column 7.
ColourTo(styler, i-1, state);
state = SCE_C_COMMENTLINE;
} else if (ch == '*' && chNext == '>') {
// Cobol inline comment: asterisk, followed by greater than.
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_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 (column == 6 && (ch == '*' || ch == '/')) {
state = SCE_C_COMMENTLINE;
} else 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-1, 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<Sci_PositionU>(startPos))))) {
ColourTo(styler, i-1, 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 (ch == '\r' || ch == '\n') {
ColourTo(styler, i-1, 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(Sci_PositionU startPos, Sci_Position length, int, WordList *[],
Accessor &styler) {
bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
Sci_PositionU endPos = startPos + length;
int visibleChars = 0;
Sci_Position 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 (Sci_PositionU 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
};
extern const LexerModule lmCOBOL(SCLEX_COBOL, ColouriseCOBOLDoc, "COBOL", FoldCOBOLDoc, COBOLWordListDesc);