src/stc/scintilla/src/LexAPDL.cxx

   1 // Scintilla source code edit control
   2 /** @file LexAPDL.cxx
   3  ** Lexer for APDL. Based on the lexer for Assembler by The Black Horus.
   4  ** By Hadar Raz.
   5  **/
   6 // Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
   7 // The License.txt file describes the conditions under which this software may be distributed.
   8
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <ctype.h>
  12 #include <stdio.h>
  13 #include <stdarg.h>
  14
  15 #include "Platform.h"
  16
  17 #include "PropSet.h"
  18 #include "Accessor.h"
  19 #include "StyleContext.h"
  20 #include "KeyWords.h"
  21 #include "Scintilla.h"
  22 #include "SciLexer.h"
  23
  24 #ifdef SCI_NAMESPACE
  25 using namespace Scintilla;
  26 #endif
  27
  28 static inline bool IsAWordChar(const int ch) {
  29         return (ch < 0x80 && (isalnum(ch) || ch == '_'));
  30 }
  31
  32 static inline bool IsAnOperator(char ch) {
  33         // '.' left out as it is used to make up numbers
  34         if (ch == '*' || ch == '/' || ch == '-' || ch == '+' ||
  35                 ch == '(' || ch == ')' || ch == '=' || ch == '^' ||
  36                 ch == '[' || ch == ']' || ch == '<' || ch == '&' ||
  37                 ch == '>' || ch == ',' || ch == '|' || ch == '~' ||
  38                 ch == '$' || ch == ':' || ch == '%')
  39                 return true;
  40         return false;
  41 }
  42
  43 static void ColouriseAPDLDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
  44                             Accessor &styler) {
  45
  46         int stringStart = ' ';
  47
  48         WordList &processors = *keywordlists[0];
  49         WordList &commands = *keywordlists[1];
  50         WordList &slashcommands = *keywordlists[2];
  51         WordList &starcommands = *keywordlists[3];
  52         WordList &arguments = *keywordlists[4];
  53         WordList &functions = *keywordlists[5];
  54
  55         // Do not leak onto next line
  56         initStyle = SCE_APDL_DEFAULT;
  57         StyleContext sc(startPos, length, initStyle, styler);
  58
  59         for (; sc.More(); sc.Forward()) {
  60                 // Determine if the current state should terminate.
  61                 if (sc.state == SCE_APDL_NUMBER) {
  62                         if (!(IsADigit(sc.ch) || sc.ch == '.' || (sc.ch == 'e' || sc.ch == 'E') ||
  63                                 ((sc.ch == '+' || sc.ch == '-') && (sc.chPrev == 'e' || sc.chPrev == 'E')))) {
  64                                 sc.SetState(SCE_APDL_DEFAULT);
  65                         }
  66                 } else if (sc.state == SCE_APDL_COMMENT) {
  67                         if (sc.atLineEnd) {
  68                                 sc.SetState(SCE_APDL_DEFAULT);
  69                         }
  70                 } else if (sc.state == SCE_APDL_COMMENTBLOCK) {
  71                         if (sc.atLineEnd) {
  72                                 if (sc.ch == '\r') {
  73                                 sc.Forward();
  74                                 }
  75                                 sc.ForwardSetState(SCE_APDL_DEFAULT);
  76                         }
  77                 } else if (sc.state == SCE_APDL_STRING) {
  78                         if (sc.atLineEnd) {
  79                                 sc.SetState(SCE_APDL_DEFAULT);
  80                         } else if ((sc.ch == '\'' && stringStart == '\'') || (sc.ch == '\"' && stringStart == '\"')) {
  81                                 sc.ForwardSetState(SCE_APDL_DEFAULT);
  82                         }
  83                 } else if (sc.state == SCE_APDL_WORD) {
  84                         if (!IsAWordChar(sc.ch)) {
  85                                 char s[100];
  86                                 sc.GetCurrentLowered(s, sizeof(s));
  87                                 if (processors.InList(s)) {
  88                                         sc.ChangeState(SCE_APDL_PROCESSOR);
  89                                 } else if (slashcommands.InList(s)) {
  90                                         sc.ChangeState(SCE_APDL_SLASHCOMMAND);
  91                                 } else if (starcommands.InList(s)) {
  92                                         sc.ChangeState(SCE_APDL_STARCOMMAND);
  93                                 } else if (commands.InList(s)) {
  94                                         sc.ChangeState(SCE_APDL_COMMAND);
  95                                 } else if (arguments.InList(s)) {
  96                                         sc.ChangeState(SCE_APDL_ARGUMENT);
  97                                 } else if (functions.InList(s)) {
  98                                         sc.ChangeState(SCE_APDL_FUNCTION);
  99                                 }
 100                                 sc.SetState(SCE_APDL_DEFAULT);
 101                         }
 102                 } else if (sc.state == SCE_APDL_OPERATOR) {
 103                         if (!IsAnOperator(static_cast<char>(sc.ch))) {
 104                             sc.SetState(SCE_APDL_DEFAULT);
 105                         }
 106                 }
 107
 108                 // Determine if a new state should be entered.
 109                 if (sc.state == SCE_APDL_DEFAULT) {
 110                         if (sc.ch == '!' && sc.chNext == '!') {
 111                                 sc.SetState(SCE_APDL_COMMENTBLOCK);
 112                         } else if (sc.ch == '!') {
 113                                 sc.SetState(SCE_APDL_COMMENT);
 114                         } else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 115                                 sc.SetState(SCE_APDL_NUMBER);
 116                         } else if (sc.ch == '\'' || sc.ch == '\"') {
 117                                 sc.SetState(SCE_APDL_STRING);
 118                                 stringStart = sc.ch;
 119                         } else if (IsAWordChar(sc.ch) || ((sc.ch == '*' || sc.ch == '/') && !isgraph(sc.chPrev))) {
 120                                 sc.SetState(SCE_APDL_WORD);
 121                         } else if (IsAnOperator(static_cast<char>(sc.ch))) {
 122                                 sc.SetState(SCE_APDL_OPERATOR);
 123                         }
 124                 }
 125         }
 126         sc.Complete();
 127 }
 128
 129 //------------------------------------------------------------------------------
 130 // 06-27-07 Sergio Lucato
 131 // - Included code folding for Ansys APDL lexer
 132 // - Copyied from LexBasic.cxx and modified for APDL
 133 //------------------------------------------------------------------------------
 134
 135 /* Bits:
 136  * 1  - whitespace
 137  * 2  - operator
 138  * 4  - identifier
 139  * 8  - decimal digit
 140  * 16 - hex digit
 141  * 32 - bin digit
 142  */
 143 static int character_classification[128] =
 144 {
 145     0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  1,  0,  0,  1,  0,  0,
 146     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
 147     1,  2,  0,  2,  2,  2,  2,  2,  2,  2,  6,  2,  2,  2,  10, 6,
 148     60, 60, 28, 28, 28, 28, 28, 28, 28, 28, 2,  2,  2,  2,  2,  2,
 149     2,  20, 20, 20, 20, 20, 20, 4,  4,  4,  4,  4,  4,  4,  4,  4,
 150     4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  2,  2,  2,  2,  4,
 151     2,  20, 20, 20, 20, 20, 20, 4,  4,  4,  4,  4,  4,  4,  4,  4,
 152     4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  2,  2,  2,  2,  0
 153 };
 154
 155 static bool IsSpace(int c) {
 156         return c < 128 && (character_classification[c] & 1);
 157 }
 158
 159 static bool IsIdentifier(int c) {
 160         return c < 128 && (character_classification[c] & 4);
 161 }
 162
 163 static int LowerCase(int c)
 164 {
 165         if (c >= 'A' && c <= 'Z')
 166                 return 'a' + c - 'A';
 167         return c;
 168 }
 169
 170 static int CheckAPDLFoldPoint(char const *token, int &level) {
 171         if (!strcmp(token, "*if") ||
 172                 !strcmp(token, "*do") ||
 173                 !strcmp(token, "*dowhile") ) {
 174                 level |= SC_FOLDLEVELHEADERFLAG;
 175                 return 1;
 176         }
 177         if (!strcmp(token, "*endif") ||
 178                 !strcmp(token, "*enddo") ) {
 179                 return -1;
 180         }
 181         return 0;
 182 }
 183
 184 static void FoldAPDLDoc(unsigned int startPos, int length, int,
 185         WordList *[], Accessor &styler) {
 186
 187         int line = styler.GetLine(startPos);
 188         int level = styler.LevelAt(line);
 189         int go = 0, done = 0;
 190         int endPos = startPos + length;
 191         char word[256];
 192         int wordlen = 0;
 193         int i;
 194     bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
 195         // Scan for tokens at the start of the line (they may include
 196         // whitespace, for tokens like "End Function"
 197         for (i = startPos; i < endPos; i++) {
 198                 int c = styler.SafeGetCharAt(i);
 199                 if (!done && !go) {
 200                         if (wordlen) { // are we scanning a token already?
 201                                 word[wordlen] = static_cast<char>(LowerCase(c));
 202                                 if (!IsIdentifier(c)) { // done with token
 203                                         word[wordlen] = '\0';
 204                                         go = CheckAPDLFoldPoint(word, level);
 205                                         if (!go) {
 206                                                 // Treat any whitespace as single blank, for
 207                                                 // things like "End   Function".
 208                                                 if (IsSpace(c) && IsIdentifier(word[wordlen - 1])) {
 209                                                         word[wordlen] = ' ';
 210                                                         if (wordlen < 255)
 211                                                                 wordlen++;
 212                                                 }
 213                                                 else // done with this line
 214                                                         done = 1;
 215                                         }
 216                                 } else if (wordlen < 255) {
 217                                         wordlen++;
 218                                 }
 219                         } else { // start scanning at first non-whitespace character
 220                                 if (!IsSpace(c)) {
 221                                         if (IsIdentifier(c)) {
 222                                                 word[0] = static_cast<char>(LowerCase(c));
 223                                                 wordlen = 1;
 224                                         } else // done with this line
 225                                                 done = 1;
 226                                 }
 227                         }
 228                 }
 229                 if (c == '\n') { // line end
 230                         if (!done && wordlen == 0 && foldCompact) // line was only space
 231                                 level |= SC_FOLDLEVELWHITEFLAG;
 232                         if (level != styler.LevelAt(line))
 233                                 styler.SetLevel(line, level);
 234                         level += go;
 235                         line++;
 236                         // reset state
 237                         wordlen = 0;
 238                         level &= ~SC_FOLDLEVELHEADERFLAG;
 239                         level &= ~SC_FOLDLEVELWHITEFLAG;
 240                         go = 0;
 241                         done = 0;
 242                 }
 243         }
 244 }
 245
 246 static const char * const apdlWordListDesc[] = {
 247     "processors",
 248     "commands",
 249     "slashommands",
 250     "starcommands",
 251     "arguments",
 252     "functions",
 253     0
 254 };
 255
 256 LexerModule lmAPDL(SCLEX_APDL, ColouriseAPDLDoc, "apdl", FoldAPDLDoc, apdlWordListDesc);