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453 lines
15 KiB
453 lines
15 KiB
// Scintilla source code edit control
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/** @file LexFortran.cxx
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** Lexer for Fortran.
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** Writen by Chuan-jian Shen, Last changed Sep. 2003
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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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/***************************************/
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdarg.h>
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/***************************************/
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#include "Platform.h"
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#include "PropSet.h"
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#include "Accessor.h"
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#include "StyleContext.h"
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#include "KeyWords.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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/***********************************************/
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static inline bool IsAWordChar(const int ch) {
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return (ch < 0x80) && (isalnum(ch) || ch == '_' || ch == '%');
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}
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/**********************************************/
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static inline bool IsAWordStart(const int ch) {
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return (ch < 0x80) && (isalnum(ch));
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}
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/***************************************/
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inline bool IsABlank(unsigned int ch) {
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return (ch == ' ') || (ch == 0x09) || (ch == 0x0b) ;
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}
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/***************************************/
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inline bool IsALineEnd(char ch) {
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return ((ch == '\n') || (ch == '\r')) ;
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}
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/***************************************/
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unsigned int GetContinuedPos(unsigned int pos, Accessor &styler) {
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while (!IsALineEnd(styler.SafeGetCharAt(pos++))) continue;
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if (styler.SafeGetCharAt(pos) == '\n') pos++;
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while (IsABlank(styler.SafeGetCharAt(pos++))) continue;
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char chCur = styler.SafeGetCharAt(pos);
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if (chCur == '&') {
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while (IsABlank(styler.SafeGetCharAt(++pos))) continue;
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return pos;
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} else {
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return pos;
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}
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}
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/***************************************/
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static void ColouriseFortranDoc(unsigned int startPos, int length, int initStyle,
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WordList *keywordlists[], Accessor &styler, bool isFixFormat) {
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WordList &keywords = *keywordlists[0];
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WordList &keywords2 = *keywordlists[1];
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WordList &keywords3 = *keywordlists[2];
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/***************************************/
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int posLineStart = 0, numNonBlank = 0, prevState = 0;
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int endPos = startPos + length;
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/***************************************/
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// backtrack to the nearest keyword
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while ((startPos > 1) && (styler.StyleAt(startPos) != SCE_F_WORD)) {
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startPos--;
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}
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startPos = styler.LineStart(styler.GetLine(startPos));
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initStyle = styler.StyleAt(startPos - 1);
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StyleContext sc(startPos, endPos-startPos, initStyle, styler);
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/***************************************/
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for (; sc.More(); sc.Forward()) {
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// remember the start position of the line
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if (sc.atLineStart) {
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posLineStart = sc.currentPos;
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numNonBlank = 0;
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sc.SetState(SCE_F_DEFAULT);
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}
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if (!IsASpaceOrTab(sc.ch)) numNonBlank ++;
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/***********************************************/
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// Handle the fix format generically
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int toLineStart = sc.currentPos - posLineStart;
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if (isFixFormat && (toLineStart < 6 || toLineStart > 72)) {
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if (toLineStart == 0 && (tolower(sc.ch) == 'c' || sc.ch == '*') || sc.ch == '!') {
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sc.SetState(SCE_F_COMMENT);
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while (!sc.atLineEnd && sc.More()) sc.Forward(); // Until line end
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} else if (toLineStart > 72) {
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sc.SetState(SCE_F_COMMENT);
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while (!sc.atLineEnd && sc.More()) sc.Forward(); // Until line end
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} else if (toLineStart < 5) {
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if (IsADigit(sc.ch))
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sc.SetState(SCE_F_LABEL);
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else
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sc.SetState(SCE_F_DEFAULT);
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} else if (toLineStart == 5) {
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if (!IsASpace(sc.ch) && sc.ch != '0') {
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sc.SetState(SCE_F_CONTINUATION);
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sc.ForwardSetState(prevState);
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} else
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sc.SetState(SCE_F_DEFAULT);
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}
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continue;
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}
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/***************************************/
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// Handle line continuation generically.
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if (!isFixFormat && sc.ch == '&') {
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char chTemp = ' ';
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int j = 1;
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while (IsABlank(chTemp) && j<132) {
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chTemp = static_cast<char>(sc.GetRelative(j));
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j++;
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}
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if (chTemp == '!') {
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sc.SetState(SCE_F_CONTINUATION);
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if (sc.chNext == '!') sc.ForwardSetState(SCE_F_COMMENT);
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} else if (chTemp == '\r' || chTemp == '\n') {
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int currentState = sc.state;
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sc.SetState(SCE_F_CONTINUATION);
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sc.ForwardSetState(SCE_F_DEFAULT);
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while (IsASpace(sc.ch) && sc.More()) sc.Forward();
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if (sc.ch == '&') {
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sc.SetState(SCE_F_CONTINUATION);
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sc.Forward();
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}
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sc.SetState(currentState);
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}
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}
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/***************************************/
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// Determine if the current state should terminate.
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if (sc.state == SCE_F_OPERATOR) {
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sc.SetState(SCE_F_DEFAULT);
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} else if (sc.state == SCE_F_NUMBER) {
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if (!(IsAWordChar(sc.ch) || sc.ch=='\'' || sc.ch=='\"' || sc.ch=='.')) {
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sc.SetState(SCE_F_DEFAULT);
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}
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} else if (sc.state == SCE_F_IDENTIFIER) {
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if (!IsAWordChar(sc.ch) || (sc.ch == '%')) {
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char s[100];
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sc.GetCurrentLowered(s, sizeof(s));
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if (keywords.InList(s)) {
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sc.ChangeState(SCE_F_WORD);
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} else if (keywords2.InList(s)) {
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sc.ChangeState(SCE_F_WORD2);
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} else if (keywords3.InList(s)) {
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sc.ChangeState(SCE_F_WORD3);
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}
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sc.SetState(SCE_F_DEFAULT);
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}
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} else if (sc.state == SCE_F_COMMENT || sc.state == SCE_F_PREPROCESSOR) {
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if (sc.ch == '\r' || sc.ch == '\n') {
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sc.SetState(SCE_F_DEFAULT);
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}
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} else if (sc.state == SCE_F_STRING1) {
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prevState = sc.state;
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if (sc.ch == '\'') {
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if (sc.chNext == '\'') {
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sc.Forward();
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} else {
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sc.ForwardSetState(SCE_F_DEFAULT);
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prevState = SCE_F_DEFAULT;
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}
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} else if (sc.atLineEnd) {
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sc.ChangeState(SCE_F_STRINGEOL);
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sc.ForwardSetState(SCE_F_DEFAULT);
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}
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} else if (sc.state == SCE_F_STRING2) {
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prevState = sc.state;
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if (sc.atLineEnd) {
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sc.ChangeState(SCE_F_STRINGEOL);
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sc.ForwardSetState(SCE_F_DEFAULT);
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} else if (sc.ch == '\"') {
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if (sc.chNext == '\"') {
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sc.Forward();
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} else {
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sc.ForwardSetState(SCE_F_DEFAULT);
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prevState = SCE_F_DEFAULT;
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}
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}
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} else if (sc.state == SCE_F_OPERATOR2) {
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if (sc.ch == '.') {
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sc.ForwardSetState(SCE_F_DEFAULT);
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}
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} else if (sc.state == SCE_F_CONTINUATION) {
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sc.SetState(SCE_F_DEFAULT);
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} else if (sc.state == SCE_F_LABEL) {
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if (!IsADigit(sc.ch)) {
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sc.SetState(SCE_F_DEFAULT);
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} else {
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if (isFixFormat && sc.currentPos-posLineStart > 4)
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sc.SetState(SCE_F_DEFAULT);
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else if (numNonBlank > 5)
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sc.SetState(SCE_F_DEFAULT);
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}
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}
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/***************************************/
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// Determine if a new state should be entered.
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if (sc.state == SCE_F_DEFAULT) {
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if (sc.ch == '!') {
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if (sc.chNext == '$') {
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sc.SetState(SCE_F_PREPROCESSOR);
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} else {
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sc.SetState(SCE_F_COMMENT);
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}
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} else if ((!isFixFormat) && IsADigit(sc.ch) && numNonBlank == 1) {
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sc.SetState(SCE_F_LABEL);
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} else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
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sc.SetState(SCE_F_NUMBER);
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} else if ((tolower(sc.ch) == 'b' || tolower(sc.ch) == 'o' ||
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tolower(sc.ch) == 'z') && (sc.chNext == '\"' || sc.chNext == '\'')) {
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sc.SetState(SCE_F_NUMBER);
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sc.Forward();
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} else if (sc.ch == '.' && isalpha(sc.chNext)) {
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sc.SetState(SCE_F_OPERATOR2);
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} else if (IsAWordStart(sc.ch)) {
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sc.SetState(SCE_F_IDENTIFIER);
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} else if (sc.ch == '\"') {
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sc.SetState(SCE_F_STRING2);
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} else if (sc.ch == '\'') {
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sc.SetState(SCE_F_STRING1);
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} else if (isoperator(static_cast<char>(sc.ch))) {
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sc.SetState(SCE_F_OPERATOR);
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}
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}
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}
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sc.Complete();
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}
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/***************************************/
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// To determine the folding level depending on keywords
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static int classifyFoldPointFortran(const char* s, const char* prevWord, const char chNextNonBlank) {
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int lev = 0;
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if ((strcmp(prevWord, "else") == 0 && strcmp(s, "if") == 0) || strcmp(s, "elseif") == 0)
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return -1;
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if (strcmp(s, "associate") == 0 || strcmp(s, "block") == 0
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|| strcmp(s, "blockdata") == 0 || strcmp(s, "select") == 0
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|| strcmp(s, "do") == 0 || strcmp(s, "enum") ==0
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|| strcmp(s, "function") == 0 || strcmp(s, "interface") == 0
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|| strcmp(s, "module") == 0 || strcmp(s, "program") == 0
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|| strcmp(s, "subroutine") == 0 || strcmp(s, "then") == 0
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|| (strcmp(s, "type") == 0 && chNextNonBlank != '(') ){
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if (strcmp(prevWord, "end") == 0)
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lev = 0;
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else
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lev = 1;
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} else if (strcmp(s, "end") == 0 && chNextNonBlank != '='
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|| strcmp(s, "endassociate") == 0 || strcmp(s, "endblock") == 0
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|| strcmp(s, "endblockdata") == 0 || strcmp(s, "endselect") == 0
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|| strcmp(s, "enddo") == 0 || strcmp(s, "endenum") ==0
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|| strcmp(s, "endif") == 0 || strcmp(s, "endforall") == 0
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|| strcmp(s, "endfunction") == 0 || strcmp(s, "endinterface") == 0
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|| strcmp(s, "endmodule") == 0 || strcmp(s, "endprogram") == 0
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|| strcmp(s, "endsubroutine") == 0 || strcmp(s, "endtype") == 0
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|| strcmp(s, "endwhere") == 0
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|| strcmp(s, "procedure") == 0 ) { // Take care of the module procedure statement
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lev = -1;
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} else if (strcmp(prevWord, "end") == 0 && strcmp(s, "if") == 0){ // end if
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lev = 0;
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}
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return lev;
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}
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// Folding the code
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static void FoldFortranDoc(unsigned int startPos, int length, int initStyle,
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Accessor &styler, bool isFixFormat) {
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//
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// bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
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// Do not know how to fold the comment at the moment.
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//
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bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
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unsigned int endPos = startPos + length;
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int visibleChars = 0;
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int lineCurrent = styler.GetLine(startPos);
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int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
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int levelCurrent = levelPrev;
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char chNext = styler[startPos];
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char chNextNonBlank;
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int styleNext = styler.StyleAt(startPos);
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int style = initStyle;
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/***************************************/
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int lastStart = 0;
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char prevWord[32] = "";
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char Label[6] = "";
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// Variables for do label folding.
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static int doLabels[100];
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static int posLabel=-1;
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/***************************************/
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for (unsigned int i = startPos; i < endPos; i++) {
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char ch = chNext;
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chNext = styler.SafeGetCharAt(i + 1);
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chNextNonBlank = chNext;
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unsigned int j=i+1;
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while(IsABlank(chNextNonBlank) && j<endPos) {
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j ++ ;
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chNextNonBlank = styler.SafeGetCharAt(j);
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}
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int stylePrev = style;
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style = styleNext;
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styleNext = styler.StyleAt(i + 1);
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bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
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//
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if (stylePrev == SCE_F_DEFAULT && (style == SCE_F_WORD || style == SCE_F_LABEL)) {
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// Store last word and label start point.
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lastStart = i;
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}
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/***************************************/
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if (style == SCE_F_WORD) {
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if(iswordchar(ch) && !iswordchar(chNext)) {
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char s[32];
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unsigned int k;
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for(k=0; (k<31 ) && (k<i-lastStart+1 ); k++) {
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s[k] = static_cast<char>(tolower(styler[lastStart+k]));
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}
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s[k] = '\0';
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// Handle the forall and where statement and structure.
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if (strcmp(s, "forall") == 0 || strcmp(s, "where") == 0) {
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if (strcmp(prevWord, "end") != 0) {
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j = i + 1;
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char chBrace = '(', chSeek = ')', ch1 = styler.SafeGetCharAt(j);
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// Find the position of the first (
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while (ch1 != chBrace && j<endPos) {
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j++;
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ch1 = styler.SafeGetCharAt(j);
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}
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char styBrace = styler.StyleAt(j);
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int depth = 1;
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char chAtPos;
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char styAtPos;
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while (j<endPos) {
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j++;
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chAtPos = styler.SafeGetCharAt(j);
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styAtPos = styler.StyleAt(j);
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if (styAtPos == styBrace) {
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if (chAtPos == chBrace) depth++;
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if (chAtPos == chSeek) depth--;
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if (depth == 0) break;
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}
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}
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while (j<endPos) {
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j++;
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chAtPos = styler.SafeGetCharAt(j);
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styAtPos = styler.StyleAt(j);
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if (styAtPos == SCE_F_COMMENT || IsABlank(chAtPos)) continue;
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if (isFixFormat) {
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if (!IsALineEnd(chAtPos)) {
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break;
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} else {
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if (lineCurrent < styler.GetLine(styler.Length()-1)) {
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j = styler.LineStart(lineCurrent+1);
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if (styler.StyleAt(j+5) == SCE_F_CONTINUATION) {
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j += 5;
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continue;
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} else {
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levelCurrent++;
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break;
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}
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}
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}
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} else {
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if (chAtPos == '&' && styler.StyleAt(j) == SCE_F_CONTINUATION) {
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j = GetContinuedPos(j+1, styler);
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continue;
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} else if (IsALineEnd(chAtPos)) {
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levelCurrent ++;
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break;
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} else {
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break;
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}
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}
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}
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}
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} else {
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levelCurrent += classifyFoldPointFortran(s, prevWord, chNextNonBlank);
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// Store the do Labels into array
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if (strcmp(s, "do") == 0 && IsADigit(chNextNonBlank)) {
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unsigned int k = 0;
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for (i=j; (i<j+5 && i<endPos); i++) {
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ch = styler.SafeGetCharAt(i);
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if (IsADigit(ch))
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Label[k++] = ch;
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else
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break;
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}
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Label[k] = '\0';
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posLabel ++;
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doLabels[posLabel] = atoi(Label);
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}
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}
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strcpy(prevWord, s);
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}
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} else if (style == SCE_F_LABEL) {
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if(IsADigit(ch) && !IsADigit(chNext)) {
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for(j = 0; ( j < 5 ) && ( j < i-lastStart+1 ); j++) {
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ch = styler.SafeGetCharAt(lastStart + j);
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if (IsADigit(ch) && styler.StyleAt(lastStart+j) == SCE_F_LABEL)
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Label[j] = ch;
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else
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break;
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}
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Label[j] = '\0';
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while (doLabels[posLabel] == atoi(Label) && posLabel > -1) {
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levelCurrent--;
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posLabel--;
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}
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}
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}
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if (atEOL) {
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int lev = levelPrev;
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if (visibleChars == 0 && foldCompact)
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lev |= SC_FOLDLEVELWHITEFLAG;
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if ((levelCurrent > levelPrev) && (visibleChars > 0))
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lev |= SC_FOLDLEVELHEADERFLAG;
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if (lev != styler.LevelAt(lineCurrent)) {
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styler.SetLevel(lineCurrent, lev);
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}
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lineCurrent++;
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levelPrev = levelCurrent;
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visibleChars = 0;
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strcpy(prevWord, "");
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}
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/***************************************/
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if (!isspacechar(ch)) visibleChars++;
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}
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/***************************************/
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// Fill in the real level of the next line, keeping the current flags as they will be filled in later
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int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
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styler.SetLevel(lineCurrent, levelPrev | flagsNext);
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}
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/***************************************/
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static const char * const FortranWordLists[] = {
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"Primary keywords and identifiers",
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"Intrinsic functions",
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"Extended and user defined functions",
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0,
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};
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/***************************************/
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static void ColouriseFortranDocFreeFormat(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
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Accessor &styler) {
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ColouriseFortranDoc(startPos, length, initStyle, keywordlists, styler, false);
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}
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/***************************************/
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static void ColouriseFortranDocFixFormat(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
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Accessor &styler) {
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ColouriseFortranDoc(startPos, length, initStyle, keywordlists, styler, true);
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}
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/***************************************/
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static void FoldFortranDocFreeFormat(unsigned int startPos, int length, int initStyle,
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WordList *[], Accessor &styler) {
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FoldFortranDoc(startPos, length, initStyle,styler, false);
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}
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/***************************************/
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static void FoldFortranDocFixFormat(unsigned int startPos, int length, int initStyle,
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WordList *[], Accessor &styler) {
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FoldFortranDoc(startPos, length, initStyle,styler, true);
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}
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/***************************************/
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LexerModule lmFortran(SCLEX_FORTRAN, ColouriseFortranDocFreeFormat, "fortran", FoldFortranDocFreeFormat, FortranWordLists);
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LexerModule lmF77(SCLEX_F77, ColouriseFortranDocFixFormat, "f77", FoldFortranDocFixFormat, FortranWordLists);
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