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// Scintilla source code edit control
/** @file LexSQL.cxx
** Lexer for SQL, including PL/SQL and SQL*Plus.
**/
// Copyright 1998-2005 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 == '_');
}
static inline bool IsAWordStart(int ch) {
return (ch < 0x80) && (isalpha(ch) || ch == '_');
}
static inline bool IsADoxygenChar(int ch) {
return (islower(ch) || ch == '$' || ch == '@' ||
ch == '\\' || ch == '&' || ch == '<' ||
ch == '>' || ch == '#' || ch == '{' ||
ch == '}' || ch == '[' || ch == ']');
}
static inline bool IsANumberChar(int ch) {
// Not exactly following number definition (several dots are seen as OK, etc.)
// but probably enough in most cases.
return (ch < 0x80) &&
(isdigit(ch) || toupper(ch) == 'E' ||
ch == '.' || ch == '-' || ch == '+');
}
static void ColouriseSQLDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
WordList &keywords1 = *keywordlists[0];
WordList &keywords2 = *keywordlists[1];
WordList &kw_pldoc = *keywordlists[2];
WordList &kw_sqlplus = *keywordlists[3];
WordList &kw_user1 = *keywordlists[4];
WordList &kw_user2 = *keywordlists[5];
WordList &kw_user3 = *keywordlists[6];
WordList &kw_user4 = *keywordlists[7];
StyleContext sc(startPos, length, initStyle, styler);
// property sql.backslash.escapes
// Enables backslash as an escape character in SQL.
bool sqlBackslashEscapes = styler.GetPropertyInt("sql.backslash.escapes", 0) != 0;
bool sqlBackticksIdentifier = styler.GetPropertyInt("lexer.sql.backticks.identifier", 0) != 0;
int styleBeforeDCKeyword = SCE_SQL_DEFAULT;
for (; sc.More(); sc.Forward()) {
// Determine if the current state should terminate.
switch (sc.state) {
case SCE_SQL_OPERATOR:
sc.SetState(SCE_SQL_DEFAULT);
break;
case SCE_SQL_NUMBER:
// We stop the number definition on non-numerical non-dot non-eE non-sign char
if (!IsANumberChar(sc.ch)) {
sc.SetState(SCE_SQL_DEFAULT);
}
break;
case SCE_SQL_IDENTIFIER:
if (!IsAWordChar(sc.ch)) {
int nextState = SCE_SQL_DEFAULT;
char s[1000];
sc.GetCurrentLowered(s, sizeof(s));
if (keywords1.InList(s)) {
sc.ChangeState(SCE_SQL_WORD);
} else if (keywords2.InList(s)) {
sc.ChangeState(SCE_SQL_WORD2);
} else if (kw_sqlplus.InListAbbreviated(s, '~')) {
sc.ChangeState(SCE_SQL_SQLPLUS);
if (strncmp(s, "rem", 3) == 0) {
nextState = SCE_SQL_SQLPLUS_COMMENT;
} else if (strncmp(s, "pro", 3) == 0) {
nextState = SCE_SQL_SQLPLUS_PROMPT;
}
} else if (kw_user1.InList(s)) {
sc.ChangeState(SCE_SQL_USER1);
} else if (kw_user2.InList(s)) {
sc.ChangeState(SCE_SQL_USER2);
} else if (kw_user3.InList(s)) {
sc.ChangeState(SCE_SQL_USER3);
} else if (kw_user4.InList(s)) {
sc.ChangeState(SCE_SQL_USER4);
}
sc.SetState(nextState);
}
break;
case SCE_SQL_QUOTEDIDENTIFIER:
if (sc.ch == 0x60) {
if (sc.chNext == 0x60) {
sc.Forward(); // Ignore it
} else {
sc.ForwardSetState(SCE_SQL_DEFAULT);
}
}
break;
case SCE_SQL_COMMENT:
if (sc.Match('*', '/')) {
sc.Forward();
sc.ForwardSetState(SCE_SQL_DEFAULT);
}
break;
case SCE_SQL_COMMENTDOC:
if (sc.Match('*', '/')) {
sc.Forward();
sc.ForwardSetState(SCE_SQL_DEFAULT);
} else if (sc.ch == '@' || sc.ch == '\\') { // Doxygen support
// Verify that we have the conditions to mark a comment-doc-keyword
if ((IsASpace(sc.chPrev) || sc.chPrev == '*') && (!IsASpace(sc.chNext))) {
styleBeforeDCKeyword = SCE_SQL_COMMENTDOC;
sc.SetState(SCE_SQL_COMMENTDOCKEYWORD);
}
}
break;
case SCE_SQL_COMMENTLINE:
case SCE_SQL_COMMENTLINEDOC:
case SCE_SQL_SQLPLUS_COMMENT:
case SCE_SQL_SQLPLUS_PROMPT:
if (sc.atLineStart) {
sc.SetState(SCE_SQL_DEFAULT);
}
break;
case SCE_SQL_COMMENTDOCKEYWORD:
if ((styleBeforeDCKeyword == SCE_SQL_COMMENTDOC) && sc.Match('*', '/')) {
sc.ChangeState(SCE_SQL_COMMENTDOCKEYWORDERROR);
sc.Forward();
sc.ForwardSetState(SCE_SQL_DEFAULT);
} else if (!IsADoxygenChar(sc.ch)) {
char s[100];
sc.GetCurrentLowered(s, sizeof(s));
if (!isspace(sc.ch) || !kw_pldoc.InList(s + 1)) {
sc.ChangeState(SCE_SQL_COMMENTDOCKEYWORDERROR);
}
sc.SetState(styleBeforeDCKeyword);
}
break;
case SCE_SQL_CHARACTER:
if (sqlBackslashEscapes && sc.ch == '\\') {
sc.Forward();
} else if (sc.ch == '\'') {
if (sc.chNext == '\"') {
sc.Forward();
} else {
sc.ForwardSetState(SCE_SQL_DEFAULT);
}
}
break;
case SCE_SQL_STRING:
if (sc.ch == '\\') {
// Escape sequence
sc.Forward();
} else if (sc.ch == '\"') {
if (sc.chNext == '\"') {
sc.Forward();
} else {
sc.ForwardSetState(SCE_SQL_DEFAULT);
}
}
break;
}
// Determine if a new state should be entered.
if (sc.state == SCE_SQL_DEFAULT) {
if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
sc.SetState(SCE_SQL_NUMBER);
} else if (IsAWordStart(sc.ch)) {
sc.SetState(SCE_SQL_IDENTIFIER);
} else if (sc.ch == 0x60 && sqlBackticksIdentifier) {
sc.SetState(SCE_SQL_QUOTEDIDENTIFIER);
} else if (sc.Match('/', '*')) {
if (sc.Match("/**") || sc.Match("/*!")) { // Support of Doxygen doc. style
sc.SetState(SCE_SQL_COMMENTDOC);
} else {
sc.SetState(SCE_SQL_COMMENT);
}
sc.Forward(); // Eat the * so it isn't used for the end of the comment
} else if (sc.Match('-', '-')) {
// MySQL requires a space or control char after --
// http://dev.mysql.com/doc/mysql/en/ansi-diff-comments.html
// Perhaps we should enforce that with proper property:
//~ } else if (sc.Match("-- ")) {
sc.SetState(SCE_SQL_COMMENTLINE);
} else if (sc.ch == '#') {
sc.SetState(SCE_SQL_COMMENTLINEDOC);
} else if (sc.ch == '\'') {
sc.SetState(SCE_SQL_CHARACTER);
} else if (sc.ch == '\"') {
sc.SetState(SCE_SQL_STRING);
} else if (isoperator(static_cast<char>(sc.ch))) {
sc.SetState(SCE_SQL_OPERATOR);
}
}
}
sc.Complete();
}
static bool IsStreamCommentStyle(int style) {
return style == SCE_SQL_COMMENT ||
style == SCE_SQL_COMMENTDOC ||
style == SCE_SQL_COMMENTDOCKEYWORD ||
style == SCE_SQL_COMMENTDOCKEYWORDERROR;
}
// Store both the current line's fold level and the next lines in the
// level store to make it easy to pick up with each increment.
static void FoldSQLDoc(unsigned int startPos, int length, int initStyle,
WordList *[], Accessor &styler) {
bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
bool foldOnlyBegin = styler.GetPropertyInt("fold.sql.only.begin", 0) != 0;
// property fold.sql.exists
// Enables "EXISTS" to end a fold as is started by "IF" in "DROP TABLE IF EXISTS".
bool foldSqlExists = styler.GetPropertyInt("fold.sql.exists", 1) != 0;
unsigned int endPos = startPos + length;
int visibleChars = 0;
int lineCurrent = styler.GetLine(startPos);
int levelCurrent = SC_FOLDLEVELBASE;
if (lineCurrent > 0) {
levelCurrent = styler.LevelAt(lineCurrent - 1) >> 16;
}
int levelNext = levelCurrent;
char chNext = styler[startPos];
int styleNext = styler.StyleAt(startPos);
int style = initStyle;
bool endFound = false;
for (unsigned int i = startPos; i < endPos; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
int stylePrev = style;
style = styleNext;
styleNext = styler.StyleAt(i + 1);
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (foldComment && IsStreamCommentStyle(style)) {
if (!IsStreamCommentStyle(stylePrev)) {
levelNext++;
} else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
// Comments don't end at end of line and the next character may be unstyled.
levelNext--;
}
}
if (foldComment && (style == SCE_SQL_COMMENTLINE)) {
// MySQL needs -- comments to be followed by space or control char
if ((ch == '-') && (chNext == '-')) {
char chNext2 = styler.SafeGetCharAt(i + 2);
char chNext3 = styler.SafeGetCharAt(i + 3);
if (chNext2 == '{' || chNext3 == '{') {
levelNext++;
} else if (chNext2 == '}' || chNext3 == '}') {
levelNext--;
}
}
}
if (style == SCE_SQL_OPERATOR) {
if (ch == '(') {
levelNext++;
} else if (ch == ')') {
levelNext--;
}
}
// If new keyword (cannot trigger on elseif or nullif, does less tests)
if (style == SCE_SQL_WORD && stylePrev != SCE_SQL_WORD) {
const int MAX_KW_LEN = 6; // Maximum length of folding keywords
char s[MAX_KW_LEN + 2];
unsigned int j = 0;
for (; j < MAX_KW_LEN + 1; j++) {
if (!iswordchar(styler[i + j])) {
break;
}
s[j] = static_cast<char>(tolower(styler[i + j]));
}
if (j == MAX_KW_LEN + 1) {
// Keyword too long, don't test it
s[0] = '\0';
} else {
s[j] = '\0';
}
if ((!foldOnlyBegin) && (strcmp(s, "if") == 0 || strcmp(s, "loop") == 0)) {
if (endFound) {
// ignore
endFound = false;
} else {
levelNext++;
}
} else if (strcmp(s, "begin") == 0) {
levelNext++;
} else if ((strcmp(s, "end") == 0) ||
// // DROP TABLE IF EXISTS or CREATE TABLE IF NOT EXISTS
(foldSqlExists && (strcmp(s, "exists") == 0)) ||
// // SQL Anywhere permits IF ... ELSE ... ENDIF
// // will only be active if "endif" appears in the
// // keyword list.
(strcmp(s, "endif") == 0)) {
endFound = true;
levelNext--;
if (levelNext < SC_FOLDLEVELBASE) {
levelNext = SC_FOLDLEVELBASE;
}
}
}
if (atEOL) {
int levelUse = levelCurrent;
int lev = levelUse | levelNext << 16;
if (visibleChars == 0 && foldCompact)
lev |= SC_FOLDLEVELWHITEFLAG;
if (levelUse < levelNext)
lev |= SC_FOLDLEVELHEADERFLAG;
if (lev != styler.LevelAt(lineCurrent)) {
styler.SetLevel(lineCurrent, lev);
}
lineCurrent++;
levelCurrent = levelNext;
visibleChars = 0;
endFound = false;
}
if (!isspacechar(ch)) {
visibleChars++;
}
}
}
static const char * const sqlWordListDesc[] = {
"Keywords",
"Database Objects",
"PLDoc",
"SQL*Plus",
"User Keywords 1",
"User Keywords 2",
"User Keywords 3",
"User Keywords 4",
0
};
LexerModule lmSQL(SCLEX_SQL, ColouriseSQLDoc, "sql", FoldSQLDoc, sqlWordListDesc);
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