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/*
* This software is derived from f2c (http://www.netlib.org/f2c) * * Copyright 1990, 1992 - 1997, 1999, 2000 by AT&T, Lucent Technologies * and Bellcore. * * See the LICENCE file for the permission notice and warranty disclaimer * provided by the f2c authors. * */ #include <f77crash/auxiliary.h> #include <f77crash/cursor.h> #include <f77crash/highlight.h> #include <f77crash/lex.h> #include <f77crash/tokens.h> #include <cassert> #include <cctype> #include <climits> #include <cstring> #include <fstream> #include <iostream> #include <vector> static bool initialized = false; enum Warn72 { Ignore = 0, Error = 1, FreeFormat = 2 }; static Warn72 warn72; static bool noExtension; static bool useBackspace; static bool shiftCase; static const int MAX_CODEBUFFER_SIZE = 10000; static const int MAX_CONTINUATIONS = 99; static const int MAX_NAMELENGTH = 50; static const char QUOTE_MARK = 2; static std::ifstream input; static std::string filename; static char *bufferBegin, *bufferEnd; enum CardType { STEOF = 1, STINITIAL = 2, STCONTINUE = 3 }; static CardType cardType; static char *cardNext, *cardEnd; long lineNumber; static long thisLine, previousLine; static char *nextCharacter = 0, *previousCharacter = 0, *lastCharacter; static char *lineStart[MAX_CONTINUATIONS]; namespace CrunchInfo { struct Pos { long line; int col; Pos() : line(0), col(0) {} Pos(long _line, int _col) : line(_line), col(_col) {} }; static std::vector<Pos> pos; static const char *begin, *last; static char **lineStart; static long lineNumber; static void init(const char *_begin, const char *_last, long _lineNumber, char *_lineStart[]) { begin = _begin; last = _last; lineStart = _lineStart; lineNumber = _lineNumber; pos.clear(); } static void store(const char *i, const char *j) { long k; long col = i - begin; for (k=0; i>=lineStart[k]; ++k) { col = i - lineStart[k]; } if ((unsigned int)(j-begin) >= pos.size()) { pos.resize(2*long(j-begin+1)); } pos[j-begin] = Pos(lineNumber+k, col); } static long getCurrentLine(const char *i) { long k; for (k=0; i>=lineStart[k]; ++k) { } return lineNumber+k; } static long getCurrentCol(const char *i) { long k; long col = i - begin; for (k=0; i>=lineStart[k]; ++k) { col = i - lineStart[k]; } return col; } static long getLine(const char *j) { if (j-begin>=0 && (unsigned int)(j-begin)<pos.size()) { return pos[j-begin].line; } return -1; } static long getCol(const char *j) { if (j-begin>=0 && (unsigned int)(j-begin)<pos.size()) { return pos[j-begin].col; } return -1; } } // namespace CrunchInfo static int statementNumber; static int nextStatementNumber; static int parenthesesLevel; static bool parenthesesSeen; static bool exposedComma, exposedEqual; static bool needWhileKey; enum LexState { NEWSTMT = 1, FIRSTTOKEN = 2, OTHERTOKEN = 3, RETEOS = 4 }; static LexState lexState = NEWSTMT; static int stkey; int yyStatementNumber; int tokenLength; char *token = 0; static int reservedTokenLength = 502; int newDeclaration; int needKeyword; bool inioctl; static char commentStart[1 << CHAR_BIT]; static char escapes[1 << CHAR_BIT]; struct Punctuation { char c; int value; }; static struct Punctuation punctuation[] = { { '(', SLPAR }, { ')', SRPAR }, { '=', SEQUALS }, { ',', SCOMMA }, { '+', SPLUS }, { '-', SMINUS }, { '*', SSTAR }, { '/', SSLASH }, { '$', SCURRENCY }, { ':', SCOLON }, { '<', SLT }, { '>', SGT }, { 0, 0 } }; struct DotOp { const char *name; int value; }; static struct DotOp dotOp[] = { { "and.", SAND }, { "or.", SOR }, { "not.", SNOT }, { "true.", STRUE }, { "false.", SFALSE }, { "eq.", SEQ }, { "ne.", SNE }, { "lt.", SLT }, { "le.", SLE }, { "gt.", SGT }, { "ge.", SGE }, { "neqv.", SNEQV }, { "eqv.", SEQV }, { 0, 0 } }; struct Key { const char *name; int value; }; static const Key *keyStart[26], *keyEnd[26]; static const Key key[] = { { "assign", SASSIGN }, { "automatic", SAUTOMATIC }, { "backspace", SBACKSPACE }, { "blockdata", SBLOCK }, { "byte", SBYTE }, { "call", SCALL }, { "character", SCHARACTER }, { "close", SCLOSE }, { "common", SCOMMON }, { "complex", SCOMPLEX }, { "continue", SCONTINUE }, { "data", SDATA }, { "dimension", SDIMENSION }, { "doubleprecision", SDOUBLE }, { "doublecomplex", SDCOMPLEX }, { "elseif", SELSEIF }, { "else", SELSE }, { "endfile", SENDFILE }, { "endif", SENDIF }, { "enddo", SENDDO }, { "end", SEND }, { "entry", SENTRY }, { "equivalence", SEQUIV }, { "external", SEXTERNAL }, { "format", SFORMAT }, { "function", SFUNCTION }, { "goto", SGOTO }, { "implicitnone", SIMPLICITNONE }, { "implicit", SIMPLICIT }, { "include", SINCLUDE }, { "inquire", SINQUIRE }, { "intrinsic", SINTRINSIC }, { "integer", SINTEGER }, { "logical", SLOGICAL }, { "namelist", SNAMELIST }, { "none", SUNDEFINED }, { "open", SOPEN }, { "parameter", SPARAM }, { "pause", SPAUSE }, { "print", SPRINT }, { "program", SPROGRAM }, { "punch", SPUNCH }, { "read", SREAD }, { "real", SREAL }, { "recursivesubroutine", SRECURSIVE }, { "return", SRETURN }, { "rewind", SREWIND }, { "save", SSAVE }, { "static", SSTATIC }, { "stop", SSTOP }, { "subroutine", SSUBROUTINE }, { "then", STHEN }, { "undefined", SUNDEFINED }, { "while", SWHILE }, { "write", SWRITE }, { 0, 0 } }; // // Forward declarations of internal functions // static void setCursor(int tokenId); static void adjustTokenLength(int newLength); static char escape(char c); static bool popInputFile(); static CardType getInputCards(); static CardType getNextInputCard(bool noContinuationAllowed); static void crunch(); static void analyze(); static int getKeyword(); static int getToken(bool intOnly); static int hexCheck(int key); // // Implementation // void initLex() { initAuxiliary(); initHighlight(); warn72 = Ignore; noExtension = false; useBackspace = true; shiftCase = true; // // Init buffer for storing source code, input cards, ... // bufferBegin = new char[MAX_CODEBUFFER_SIZE]; assert(bufferBegin); bufferEnd = bufferBegin + MAX_CODEBUFFER_SIZE - 1; cardNext = 0; cardEnd = bufferBegin; parenthesesLevel = 0; parenthesesSeen = false; // // Init lookup-table for characters starting comment // commentStart[(unsigned char)('c')] = 1; commentStart[(unsigned char)('C')] = 1; commentStart[(unsigned char)('*')] = 1; commentStart[(unsigned char)('!')] = 1; commentStart[(unsigned char)('#')] = 1; // // Init lookup-table for escaping characters // for (int i=0; i < (1<<CHAR_BIT); ++i) { escapes[i] = i; } escapes[(unsigned char)('b')] = '\b'; escapes[(unsigned char)('t')] = '\t'; escapes[(unsigned char)('n')] = '\n'; escapes[(unsigned char)('f')] = '\f'; escapes[(unsigned char)('r')] = '\r'; escapes[(unsigned char)('0')] = 0; // // Init lookup-table for Fortran keywords // for (int i = 0; i<26; ++i) { keyStart[i] = 0; } for (const Key *pk=key; pk->name; ++pk) { unsigned char j = letter(pk->name[0]); if (keyStart[j] == 0) { keyStart[j] = pk; } keyEnd[j] = pk; } // // Reserve memory for token string // adjustTokenLength(reservedTokenLength); initialized = true; } int yylex() { assert(initialized); static int tokenNumber; int returnValue; previousCharacter = nextCharacter; switch (lexState) { case NEWSTMT: // // need a new statement // returnValue = getInputCards(); if (returnValue == STEOF) { returnValue = SEOF; break; } crunch(); tokenNumber = 0; lexState = FIRSTTOKEN; yyStatementNumber = statementNumber; statementNumber = nextStatementNumber; tokenLength = 0; returnValue = SLABEL; break; first: case FIRSTTOKEN: // // first step on a statement // analyze(); lexState = OTHERTOKEN; tokenNumber = 1; returnValue = stkey; break; case OTHERTOKEN: // // return next token // if (nextCharacter > lastCharacter) { goto reteos; } ++tokenNumber; if ((stkey==SLOGIF || stkey==SELSEIF) && parenthesesLevel==0 && tokenNumber>3) { goto first; } if (stkey==SASSIGN && tokenNumber==3 && nextCharacter<lastCharacter && nextCharacter[0]=='t' && nextCharacter[1]=='o') { nextCharacter += 2; returnValue = STO; break; } if (tokenNumber == 2 && stkey == SDO) { returnValue = getToken(true); } else { returnValue = getToken(false); } break; reteos: case RETEOS: lexState = NEWSTMT; returnValue = SEOS; break; default: std::cerr << "Error in line " << lineNumber << ": impossible lexstate " << lexState << std::endl; exit(1); break; } setCursor(returnValue); return returnValue; } void yyerror(const char *s) { /* std::cerr << "Error in line " << lineNumber << ": " << s << std::endl; */ } void flushLine() { lexState = RETEOS; } static void setCursor(int tokenId) { cursor.fromLine = CrunchInfo::getLine(previousCharacter); cursor.fromCol = CrunchInfo::getCol(previousCharacter); cursor.toLine = CrunchInfo::getLine(nextCharacter-1); cursor.toCol = CrunchInfo::getCol(nextCharacter-1); cursor.tokenId = tokenId; cursor.statementNumber = yyStatementNumber; size_t len = 0; if (previousCharacter >= bufferBegin && previousCharacter <= nextCharacter && nextCharacter <= bufferEnd) { len = nextCharacter - previousCharacter; } cursor.content.replace(0, cursor.content.size(), previousCharacter, len); if (isHighlighted(tokenId)) { std::cout << getHighlightTag(tokenId) << ","; std::cout << cursor.fromLine-1 << "." << cursor.fromCol+6 << ":" << cursor.toLine-1 << "." << cursor.toCol+6 << ","; std::cout << yyStatementNumber << "," << tokenId << "," << cursor.content << std::endl; } } static void adjustTokenLength(int newLength) { while (reservedTokenLength < newLength) { reservedTokenLength = 2*reservedTokenLength + 2; } if ((token = (char *)(realloc(token, reservedTokenLength)))) { return; } std::cerr << "adjtoklen: realloc(" << reservedTokenLength << ") failure!" << std::endl; exit(2); } static char escape(char c) { typedef unsigned char uchar; return escapes[uchar(c)]; } // // Public interface // void doInputFile(const char *filename) { assert(cardNext==0); assert(cardEnd==bufferBegin); input.open(filename, std::ifstream::in); } static bool popInputFile() { return false; } static CardType getInputCards() { top: if (cardNext == 0) { cardNext = bufferBegin; cardType = getNextInputCard(true); statementNumber = nextStatementNumber; previousLine = thisLine; } if (cardType == STEOF) { if (popInputFile()) { goto top; } else { return STEOF; } } if (cardType == STCONTINUE) { lineNumber = thisLine; cardNext = 0; goto top; } // // Get rid of unused space at the head of the buffer */ // if (cardNext > bufferBegin) { const char *q = cardNext; char *p = bufferBegin; while (q < cardEnd) { *p++ = *q++; } cardEnd = p; } // // Be aware that the input (i.e. the string at the address cardNext) is NOT // NULL-terminated // // This loop merges all continuations into one long statement, AND puts the next // card to be read at the end of the buffer (i.e. it stores the look-ahead card // when there's room) // int numberOfContinuations = 0; for (;;) { cardNext = cardEnd; if (numberOfContinuations >= MAX_CONTINUATIONS || cardNext+66 > bufferEnd) { lineNumber = thisLine; std::cerr << "Error in line " << lineNumber << ": too many continuation lines" << std::endl; } lineStart[numberOfContinuations++] = cardNext; if ((cardType = getNextInputCard(false)) != STCONTINUE) { break; } if (numberOfContinuations == 20 && noExtension) { lineNumber = thisLine; std::cerr << "Error: more than 19 continuation lines." << std::endl; } } nextCharacter = bufferBegin; lastCharacter = cardNext - 1; lineNumber = previousLine; previousLine = thisLine; return(STINITIAL); } static CardType getNextInputCard(bool noContinuationAllowed) { assert(input.is_open()); bool ampersant; bool specialLine; // Special line - true when the line is allowed // to have more than 66 characters (e.g. the // "&" shorthand for continuation, use of a "\t" // to skip part of the label columns) static char a[6]; // Statement label buffer static char *aEnd = a+6; char buf72[24]; char *atend; char *p, *bEnd; int c; assert(cardNext!=0); top: cardEnd = cardNext; bEnd = cardNext + 66; ampersant = false; specialLine = false; assert(cardEnd<=bufferEnd); // // Handle the continuation shorthand of "&" in the first column, which stands // for " x" // if ((c=input.get()) == '&') { a[0] = c; a[1] = 0; a[5] = 'x'; ampersant = specialLine = true; bEnd = bufferEnd; p = aEnd; } // // Handle the Comment cards (a 'C', 'c', '*', or '!' in the first column). // else if (commentStart[c & ((1<<CHAR_BIT) - 1)]) { if (input.eof()) { return STEOF; } if (c == '#') { *cardEnd++ = c; while ((c=input.get()) != '\n') { if (c==EOF) { return STEOF; } else if (cardEnd<bufferEnd) { *cardEnd++ = c; } } ++thisLine; *cardEnd = 0; p = cardNext; if (cardNext[1]==' ') { p += 2; } else if (!strncmp(cardNext, "#line", 6)) { p += 6; } else { bad_cpp: lineNumber = thisLine; std::cerr << "Error in line " << lineNumber << std::endl; std::cerr << "Bad # line: " << cardNext << std::endl; goto top; } if (*p < '1' || *p > '9') { goto bad_cpp; } long L = *p - '0'; while ((c = *++p) >= '0' && c <= '9') { L = 10*L + c - '0'; } while (c == ' ') { c = *++p; } if (!c) { /* accept "# 1234" */ std::cerr << "TODO: Keeping track of changed line numbers" << std::endl; thisLine = L - 1; goto top; } if (c != '"') { goto bad_cpp; } char *newFilename = p+1; while (*++p != '"') { if (!*p) { goto bad_cpp; } } *p = 0; thisLine = L-1; std::cerr << "TODO: Keeping track of changed line numbers" << std::endl; if (!filename.c_str() || strcmp(filename.c_str(), newFilename)) { std::cerr << "TODO: Keeping track of changed file name" << std::endl; filename = std::string(newFilename); } goto top; } std::cout << "COMMENT," << thisLine << ".0:" << thisLine << ".-1" << std::endl; while (!input.eof() && ((c = input.get()) != '\n')) { } if (input.eof()) { if (c != '\n') { // To allow the line index to increment correctly return STEOF; } } ++thisLine; goto top; } // // Load buffer a with the statement label // else if (c!=EOF) { // a tab in columns 1-6 skips to column 7 input.unget(); for (p=a; p<aEnd && (c=input.get())!='\n' && c!=EOF; ) { if (c=='\t') { // The tab character translates into blank characters in the // statement label atend = p; while (p<aEnd) { *p++ = ' '; } specialLine = true; bEnd = bufferEnd; } else { *p++ = c; } } } // // By now we've read either a continuation character or the statement label // field // if (c==EOF) { return STEOF; } // // The next 'if' block handles lines that have fewer than 7 characters // if (c=='\n') { while (p<aEnd) { *p++ = ' '; } // // Blank out the buffer on lines which are not longer than 66 // characters if (! specialLine) { while (cardEnd<bEnd) { *cardEnd++ = ' '; } } } else { // read body of line if (warn72==FreeFormat) { specialLine = true; bEnd = bufferEnd; } while (cardEnd<bEnd && (c=input.get())!='\n' && c!=EOF ) { *cardEnd++ = c; } if (c==EOF) { return STEOF; } // Drop any extra characters on the input card; this usually means // those after column 72 if (c!='\n') { int i = 0; while( (c=input.get())!='\n' && c != EOF) { if (i<23 && c!='\r') { buf72[i++] = c; } } if (warn72!=Ignore && i && !specialLine) { buf72[i] = 0; if (i>=23) { strcpy(buf72+20, "..."); } lineNumber = thisLine + 1; std::cerr << "Error in line " << lineNumber << std::endl; std::cerr << "text after column 72: " << buf72 << std::endl; } if(c == EOF) { return STEOF; } } if (! specialLine) { while(cardEnd<bEnd) { *cardEnd++ = ' '; } } } // // The flow of control usually gets to this line (unless an earlier RETURN has // been taken) */ // ++thisLine; if (!isspace(a[5]) && a[5]!='0') { // Fortran 77 specifies that a 0 in column 6 // does not signify continuation if (!ampersant) { for (p=a; p<aEnd; ) { if (*p++=='!' && p!=aEnd) { goto initcheck; } } } if (noContinuationAllowed) { lineNumber = thisLine; std::cerr << "Error in line " << lineNumber << ": " << "illegal continuation card (starts \"" << std::string(a, 0, 6) << "\")" << std::endl; } else if (!ampersant && strncmp(a, " ", 5)) { lineNumber = thisLine; std::cerr << "Error in line " << lineNumber << ": " << "illegal continuation card (starts \"" << std::string(a, 0, 6) << "\")" << std::endl; } return STCONTINUE; } initcheck: for (p=a; p<atend; ++p) { if (!isspace(*p)) { if (*p++ != '!') { goto initline; } printf("COMMENT,%ld.%ld:%ld.-1\n", thisLine-1, p-a-1, thisLine-1); goto top; } } for (p=cardNext; p<cardEnd; ++p) { if (!isspace(*p)) { if (*p++ != '!') { goto initline; } printf("COMMENT,%ld.%ld:%ld.-1\n", thisLine-1, p-cardNext+5, thisLine-1); goto top; } } // // Skip over blank cards by reading the next one right away // goto top; initline: // // Set nextStatementNumber equal to the integer value of the statement label // nextStatementNumber = 0; bEnd = a + 5; for (p=a; p<bEnd; ++p) { if (!isspace(*p)) { if (isdigit(*p)) { nextStatementNumber = 10*nextStatementNumber + (*p - '0'); } else if (*p == '!') { printf("COMMENT,%ld.%ld:%ld.-1", thisLine-1, p-a-1, thisLine-1); cardEnd = cardNext; break; } else { lineNumber = thisLine; std::cerr << "Error in line " << lineNumber << ": " << "nondigit in statement label field \"" << std::string(a, 0, 5) << "\")" << std::endl; } } } return STINITIAL; } static void crunch() { // // i is the next input character to be looked at // j is the next output character // char *i, *j; char *previousString = bufferBegin; exposedComma = false; exposedEqual = false; parenthesesLevel = 0; parenthesesSeen = false; CrunchInfo::init(bufferBegin, lastCharacter, lineNumber, lineStart); int k = 0; for (i=j=bufferBegin; i<=lastCharacter; ++i) { if (isspace(*i)) { continue; } if (*i == '!') { long currLine = CrunchInfo::getCurrentLine(i); int currCol = CrunchInfo::getCurrentCol(i) + 7; printf("COMMENT,%ld.%d:%ld.-1\n", currLine-1, currCol-1, currLine-1); while (i >= lineStart[k]) { if (++k >= MAX_CONTINUATIONS) { std::cerr << "Error in line " << lineNumber << ": too many continuation lines" << " (MAX_CONTINUATIONS = " << MAX_CONTINUATIONS << ")" << std::endl; exit(1); } } i = lineStart[k] - 1; continue; } if (*i=='\'' || *i=='"') { // // Keep everything in a quoted string // int length = 0; char quote = *i; *j = QUOTE_MARK; CrunchInfo::store(i, j); for(;;) { if (++i > lastCharacter) { std::cerr << "Error in line " << lineNumber << ": unbalanced quotes; closing quote supplied" << std::endl; if (j >= lastCharacter) { j = lastCharacter - 1; } break; } if (*i == quote) { if (i<lastCharacter && i[1]==quote) { ++i; } else { break; } } else if(*i=='\\' && i<lastCharacter && useBackspace) { ++i; *i = escape(*i); } *++j = *i; CrunchInfo::store(i, j); length++; } if ((length = j - bufferBegin) > reservedTokenLength) { adjustTokenLength(length); } j[1] = QUOTE_MARK; CrunchInfo::store(i, j+1); j += 2; previousString = j; } else if ((*i=='h' || *i=='H') && j>previousString) { // // Test for Hollerith strings // char *j0 = j - 1; if (! isdigit(*j0)) { goto copychar; } int hollerithLength = *j0 - '0'; int ten = 10; char *j1 = previousString; if (j1 > bufferBegin && j1[-1] == QUOTE_MARK) { --j1; } if (j1+4 < j) { j1 = j-4; } for (;;) { if (j0-- <= j1) { goto copychar; } if (! isdigit(*j0 )) { break; } hollerithLength += ten * (*j0-'0'); ten*=10; } // // A Hollerith string must be preceded by a punctuation mark. // '*' is possible only as repetition factor in a data statement // not, in particular, in character*2h . // To avoid some confusion with missing commas in FORMAT statements, // treat a preceding string as a punctuation mark. // if (!(*j0=='*' && bufferBegin[0]=='d') && *j0!='/' && *j0!='(' && *j0!=',' && *j0!='=' && *j0!='.' && *j0 != QUOTE_MARK) { goto copychar; } int hollerithLength0 = hollerithLength; if (i+hollerithLength > lastCharacter) { std::cerr << "Error in line " << lineNumber << ": " << hollerithLength << "H too big" << std::endl; hollerithLength = lastCharacter - i; hollerithLength0 = -1; } j0[1] = QUOTE_MARK; j = j0 + 1; while (hollerithLength-- > 0) { if (++i > lastCharacter) { hol_overflow: if (hollerithLength0 >= 0) { std::cerr << "Error in line " << lineNumber << "escapes make " << hollerithLength0 << "H too big" << std::endl; } break; } if (*i == '\\' && useBackspace) { if (++i > lastCharacter) { goto hol_overflow; } *i = escape(*i); } *++j = *i; CrunchInfo::store(i, j); } j[1] = QUOTE_MARK; CrunchInfo::store(i, j+1); j+=2; previousString = j; } else { if (*i == '(') { ++parenthesesLevel; parenthesesSeen = true; } else if (*i == ')') { --parenthesesLevel; } else if (parenthesesLevel == 0) { if (*i == '=') { exposedEqual = true; } else if (*i == ',') { exposedComma = true; } } copychar: // // not a string or space -- copy, shifting case if necessary // if (shiftCase && isupper(*i)) { *j++ = tolower(*i); } else { *j++ = *i; } CrunchInfo::store(i, j-1); } } lastCharacter = j - 1; nextCharacter = bufferBegin; } static void analyze() { if (parenthesesLevel != 0) { std::cerr << "Error in line " << lineNumber << ": unbalanced parentheses, statement skipped" << std::endl; stkey = SUNKNOWN; // // prevent double error msg // lastCharacter = bufferBegin - 1; return; } if (nextCharacter+2<=lastCharacter && nextCharacter[0]=='i' && nextCharacter[1]=='f' && nextCharacter[2]=='(') { // // assignment or if statement -- look at character after balancing paren // char *i; parenthesesLevel = 1; for (i=nextCharacter+3 ; i<=lastCharacter; ++i) { if (*i == QUOTE_MARK) { while (*++i != QUOTE_MARK) { } } else if (*i == '(') { ++parenthesesLevel; } else if (*i == ')') { if (--parenthesesLevel == 0) { break; } } } if (i >= lastCharacter) { stkey = SLOGIF; } else if (i[1] == '=') { stkey = SLET; } else if (isdigit(i[1])) { stkey = SARITHIF; } else { stkey = SLOGIF; } if (stkey != SLET) { nextCharacter += 2; } } else if (exposedEqual) { // // may be an assignment // if (exposedComma && nextCharacter<lastCharacter && nextCharacter[0]=='d' && nextCharacter[1]=='o') { stkey = SDO; nextCharacter += 2; } else { stkey = SLET; } } else if (parenthesesSeen && (nextCharacter + 7 < lastCharacter) // screen out "double..." early && nextCharacter[2] != 'u' && nextCharacter[0] == 'd' && nextCharacter[1] == 'o' && ((nextCharacter[2] >= '0' && nextCharacter[2] <= '9') || nextCharacter[2] == ',' || nextCharacter[2] == 'w')) { stkey = SDO; nextCharacter += 2; needWhileKey = true; } else { // // otherwise search for keyword // stkey = getKeyword(); if (stkey==SGOTO && lastCharacter>=nextCharacter) { if (nextCharacter[0]=='(') { stkey = SCOMPGOTO; } else if (isAlpha_(*nextCharacter)) { stkey = SASGOTO; } } } parenthesesLevel = 0; } static int getKeyword() { if (! isAlpha_(*nextCharacter)) { return SUNKNOWN; } unsigned char k = letter(nextCharacter[0]); if (const Key *pk = keyStart[k]) { for (const Key *pend = keyEnd[k]; pk<=pend; ++pk ) { const char *i = pk->name; char *j = nextCharacter; while (*++i==*++j && *i!='\0') { } if (*i=='\0' && j<=lastCharacter+1) { nextCharacter = j; return pk->value; } } } return SUNKNOWN; } static int getToken(bool intOnly) { static const char *expMinus = "X**-Y treated as X**(-Y)", *expPlus = "X**+Y treated as X**(+Y)"; bool haveDot = false; bool haveExp = false; bool haveDouble = false; char *p, *i; int c = (unsigned char)(*nextCharacter); if (c == QUOTE_MARK) { ++nextCharacter; p = token; while (*nextCharacter != QUOTE_MARK) { *p++ = *nextCharacter++; } tokenLength = p - token; *p = 0; // // allow octal, binary, hex constants of the form 'abc'x (etc.) // int value; if (++nextCharacter <= lastCharacter && isAlpha_(value = (unsigned char)(*nextCharacter))) { ++nextCharacter; return hexCheck(value); } return SHOLLERITH; } if (needKeyword) { needKeyword = false; return getKeyword(); } for (Punctuation *pp=punctuation; pp->c; ++pp) { if (c == pp->c) { int value = pp->value; if (++nextCharacter <= lastCharacter) { switch (c) { case '/': switch (*nextCharacter) { case '/': nextCharacter++; value = SCONCAT; break; case '=': goto sne; default: if (newDeclaration && parenthesesLevel == 0) { value = SSLASHD; } } return value; case '*': if (*nextCharacter == '*') { nextCharacter++; if (noExtension && nextCharacter <= lastCharacter) { switch (*nextCharacter) { case '-': std::cerr << "Error in line " << lineNumber << expMinus << std::endl; break; case '+': std::cerr << "Error in line " << lineNumber << expPlus << std::endl; } } return SPOWER; } break; case '<': switch(*nextCharacter) { case '=': nextCharacter++; value = SLE; break; case '>': sne: nextCharacter++; value = SNE; } goto extchk; case '=': if (*nextCharacter == '=') { nextCharacter++; value = SEQ; goto extchk; } break; case '>': if (*nextCharacter == '=') { nextCharacter++; value = SGE; } extchk: if (noExtension) { std::cerr << "Error in line " << lineNumber << "Fortran 8x comparison operator" << std::endl; } return value; } } else if (c == '/' && newDeclaration && parenthesesLevel == 0) { return SSLASHD; } switch (value) { case SLPAR: ++parenthesesLevel; break; case SRPAR: --parenthesesLevel; } return value; } } if (c == '.') { if (nextCharacter >= lastCharacter) { goto badchar; } else if (isdigit(nextCharacter[1])) { goto numconst; } else { const char *j; for (DotOp *pd=dotOp; (j=pd->name) ; ++pd) { for (i=nextCharacter+1; i<=lastCharacter; ++i) { if (*i != *j) { break; } else if (*i != '.') { ++j; } else { nextCharacter = i+1; return pd->value; } } } goto badchar; } } if (isAlpha_(c)) { p = token; *p++ = *nextCharacter++; while (nextCharacter<=lastCharacter) { if (isAlphaNum_((unsigned char)(*nextCharacter))) { *p++ = *nextCharacter++; } else { break; } } tokenLength = p - token; *p = 0; if (needWhileKey) { needKeyword = 0; if (tokenLength == 5 && nextCharacter <= lastCharacter && *nextCharacter == '(' // ) && !strcmp(token,"while")) { return SWHILE; } } if (inioctl && nextCharacter<=lastCharacter && *nextCharacter=='=') { ++nextCharacter; return SNAMEEQ; } if (tokenLength>8 && !strncmp(token, "function", 8) && isAlpha_((unsigned char)(token[8])) && nextCharacter < lastCharacter && nextCharacter[0]=='(' && (nextCharacter[1]==')' || isAlpha_((unsigned char)(nextCharacter[1])))) { nextCharacter -= (tokenLength - 8); return SFUNCTION; } if (tokenLength > MAX_NAMELENGTH) { char buff[2*MAX_NAMELENGTH+50]; if (tokenLength >= MAX_NAMELENGTH+10) { sprintf(buff, "name %.*s... too long, truncated to %.*s", MAX_NAMELENGTH+6, token, MAX_NAMELENGTH, token); } else { sprintf(buff, "name %s too long, truncated to %.*s", token, MAX_NAMELENGTH, token); } std::cerr << "Error in line " << lineNumber << ": " << buff << std::endl; tokenLength = MAX_NAMELENGTH; token[MAX_NAMELENGTH] = '\0'; } if (tokenLength==1 && *nextCharacter==QUOTE_MARK) { int value = token[0]; ++nextCharacter; for (p=token; *nextCharacter!=QUOTE_MARK; ) { *p++ = *nextCharacter++; } ++nextCharacter; tokenLength = p - token; *p = 0; return hexCheck(value); } return(SNAME); } if (isdigit(c)) { // // Check for NAG's special hex constant // if ((nextCharacter[1] == '#' && nextCharacter < lastCharacter) || (nextCharacter[2] == '#' && isdigit(nextCharacter[1]) && lastCharacter - nextCharacter >= 2)) { int radix = atoi(nextCharacter); p = 0; if (*++nextCharacter != '#') { ++nextCharacter; } if (radix != 2 && radix != 8 && radix != 16) { std::cerr << "Error in line " << lineNumber << ":invalid base " << radix << " for constant, defaulting to hex" << std::endl; radix = 16; } if (++nextCharacter > lastCharacter) { goto badchar; } for (p = token; hexToInt(*nextCharacter) < radix;) { *p++ = *nextCharacter++; if (nextCharacter > lastCharacter) { break; } } tokenLength = p - token; *p = 0; return (radix == 16) ? SHEXCON : ((radix == 8) ? SOCTCON : SBITCON); } } else { goto badchar; } numconst: char *n1; for (n1 = nextCharacter; nextCharacter<=lastCharacter; ++nextCharacter) { if (*nextCharacter == '.') { if (haveDot) { break; } else if (nextCharacter+2<=lastCharacter && isAlpha_((unsigned char)(nextCharacter[1])) && isAlpha_((unsigned char)(nextCharacter[2]))) { break; } else { haveDot = true; } } else if (! isdigit((unsigned char)(*nextCharacter))) { if (!intOnly && (*nextCharacter=='d' || *nextCharacter=='e') ) { p = nextCharacter; haveExp = true; if (*nextCharacter == 'd') { haveDouble = true; } if (nextCharacter<lastCharacter) { if (nextCharacter[1]=='+' || nextCharacter[1]=='-') { ++nextCharacter; } } if (! isdigit(*++nextCharacter)) { nextCharacter = p; haveDouble = haveExp = false; break; } for (++nextCharacter; nextCharacter<=lastCharacter && isdigit((unsigned char)(*nextCharacter)); ++nextCharacter); } break; } } p = token; i = n1; while (i < nextCharacter) { *p++ = *i++; } tokenLength = p - token; *p = 0; if (haveDouble) { return SDCON; } if (haveDot || haveExp) { return SRCON; } return SICON; badchar: bufferBegin[0] = *nextCharacter++; return SUNKNOWN; } static int hexCheck(int key) { static const char *kindName[3] = { "hexadecimal", "octal", "binary" }; int radix, kind; switch (key) { case 'z': case 'Z': case 'x': case 'X': radix = 16; key = SHEXCON; kind = 0; break; case 'o': case 'O': radix = 8; key = SOCTCON; kind= 1; break; case 'b': case 'B': radix = 2; key = SBITCON; kind = 2; break; default: std::cerr << "Error in line " << lineNumber << ": bad bit identifier" << std::endl;; return SNAME; } for (char *p = token; *p; p++) { if (hexToInt(*p) >= radix) { std::cerr << "Error in line " << lineNumber << ": invalid " << kindName[kind] << " character" << std::endl; break; } } return key; } |