ULONG yylex(void)
{
ULONG hash, maxlen;
char *s;
struct sLexString *pLongestFixed = NULL;
ULONG nFloatMask, nOldFloatMask, nFloatLen;
ULONG linestart = AtLineStart;
switch (lexerstate) {
case LEX_STATE_NORMAL:
AtLineStart = 0;
scanagain:
while (*pLexBuffer == ' ' || *pLexBuffer == '\t') {
linestart = 0;
pLexBuffer += 1;
}
if (*pLexBuffer == 0) {
if (yywrap() == 0) {
linestart = AtLineStart;
AtLineStart = 0;
goto scanagain;
}
}
s = pLexBuffer;
nOldFloatMask = nFloatLen = 0;
nFloatMask = tFloatingFirstChar[(int) *s++];
while (nFloatMask && nFloatLen < nLexBufferLeng) {
nFloatLen += 1;
nOldFloatMask = nFloatMask;
if (nFloatLen == 1)
nFloatMask &= tFloatingSecondChar[(int) *s++];
else
nFloatMask &= tFloatingChars[(int) *s++];
}
maxlen = nLexBufferLeng;
if (nLexMaxLeng < maxlen)
maxlen = nLexMaxLeng;
yyleng = 0;
hash = 0;
s = pLexBuffer;
while (yyleng < nLexMaxLeng) {
yyleng += 1;
hash = ((hash << 1) + (toupper(*s))) % LEXHASHSIZE;
s += 1;
if (tLexHash[hash]) {
struct sLexString *lex;
lex = tLexHash[hash];
while (lex) {
if (lex->nNameLength == yyleng) {
if (strnicmp
(pLexBuffer, lex->tzName,
yyleng) == 0) {
pLongestFixed = lex;
}
}
lex = lex->pNext;
}
}
}
if (nFloatLen == 0 && pLongestFixed == NULL) {
if (*pLexBuffer == '"') {
ULONG index = 0;
pLexBuffer += 1;
while ((*pLexBuffer != '"')
&& (*pLexBuffer != '\n')) {
char ch, *marg;
if ((ch = *pLexBuffer++) == '\\') {
switch (ch = (*pLexBuffer++)) {
case 'n':
ch = '\n';
break;
case 't':
ch = '\t';
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if ((marg =
sym_FindMacroArg(ch
-
'0'))
!= NULL) {
while (*marg)
yylval.
tzString
[index++]
=
*marg++;
ch = 0;
}
break;
case '@':
if ((marg =
sym_FindMacroArg
(-1)) != NULL) {
while (*marg)
yylval.
tzString
[index++]
=
*marg++;
ch = 0;
}
break;
}
} else if (ch == '{') {
char sym[MAXSYMLEN];
int i = 0;
while ((*pLexBuffer != '}')
&& (*pLexBuffer != '"')
&& (*pLexBuffer !=
'\n')) {
if ((ch =
*pLexBuffer++) ==
'\\') {
switch (ch =
(*pLexBuffer++))
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if ((marg = sym_FindMacroArg(ch - '0')) != NULL) {
while
(*marg)
sym[i++] = *marg++;
ch = 0;
}
break;
case '@':
if ((marg = sym_FindMacroArg(-1)) != NULL) {
while
(*marg)
sym[i++] = *marg++;
ch = 0;
}
break;
}
} else
sym[i++] = ch;
}
sym[i] = 0;
index +=
symvaluetostring(&yylval.
tzString
[index],
sym);
if (*pLexBuffer == '}')
pLexBuffer += 1;
else
yyerror("Missing }");
ch = 0;
}
if (ch)
yylval.tzString[index++] = ch;
}
yylval.tzString[index++] = 0;
if (*pLexBuffer == '\n')
yyerror("Unterminated string");
else
pLexBuffer += 1;
return (T_STRING);
} else if (*pLexBuffer == '{') {
char sym[MAXSYMLEN], ch, *marg;
int i = 0;
pLexBuffer += 1;
while ((*pLexBuffer != '}')
&& (*pLexBuffer != '\n')) {
if ((ch = *pLexBuffer++) == '\\') {
switch (ch = (*pLexBuffer++)) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if ((marg =
sym_FindMacroArg(ch
-
'0'))
!= NULL) {
while (*marg)
sym[i++]
=
*marg++;
ch = 0;
}
break;
case '@':
if ((marg =
sym_FindMacroArg
(-1)) != NULL) {
while (*marg)
sym[i++]
=
*marg++;
ch = 0;
}
break;
}
} else
sym[i++] = ch;
}
sym[i] = 0;
symvaluetostring(yylval.tzString, sym);
if (*pLexBuffer == '}')
pLexBuffer += 1;
else
yyerror("Missing }");
return (T_STRING);
} else {
if (*pLexBuffer == '\n')
AtLineStart = 1;
yyleng = 1;
return (*pLexBuffer++);
}
}
if (nFloatLen == 0) {
yyleng = pLongestFixed->nNameLength;
pLexBuffer += yyleng;
return (pLongestFixed->nToken);
}
if (pLongestFixed == NULL) {
struct sLexFloat *tok;
tok = lexgetfloat(nOldFloatMask);
yyleng = nFloatLen;
if (tok->Callback) {
if (tok->Callback(pLexBuffer, yyleng) == 0)
goto scanagain;
}
if (tok->nToken == T_ID && linestart) {
pLexBuffer += yyleng;
return (T_LABEL);
} else {
pLexBuffer += yyleng;
return (tok->nToken);
}
}
if (nFloatLen > pLongestFixed->nNameLength) {
struct sLexFloat *tok;
tok = lexgetfloat(nOldFloatMask);
yyleng = nFloatLen;
if (tok->Callback) {
if (tok->Callback(pLexBuffer, yyleng) == 0)
goto scanagain;
}
if (tok->nToken == T_ID && linestart) {
pLexBuffer += yyleng;
return (T_LABEL);
} else {
pLexBuffer += yyleng;
return (tok->nToken);
}
} else {
yyleng = pLongestFixed->nNameLength;
pLexBuffer += yyleng;
return (pLongestFixed->nToken);
}
break;
case LEX_STATE_MACROARGS:
{
ULONG index = 0;
while (*pLexBuffer == ' ' || *pLexBuffer == '\t') {
linestart = 0;
pLexBuffer += 1;
}
while ((*pLexBuffer != ',')
&& (*pLexBuffer != '\n')) {
char ch, *marg;
if ((ch = *pLexBuffer++) == '\\') {
switch (ch = (*pLexBuffer++)) {
case 'n':
ch = '\n';
break;
case 't':
ch = '\t';
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if ((marg =
sym_FindMacroArg(ch -
'0')) !=
NULL) {
while (*marg)
yylval.
tzString
[index++] =
*marg++;
ch = 0;
}
break;
case '@':
if ((marg =
sym_FindMacroArg(-1)) !=
NULL) {
while (*marg)
yylval.
tzString
[index++] =
*marg++;
ch = 0;
}
break;
}
} else if (ch == '{') {
char sym[MAXSYMLEN];
int i = 0;
while ((*pLexBuffer != '}')
&& (*pLexBuffer != '"')
&& (*pLexBuffer != '\n')) {
if ((ch =
*pLexBuffer++) == '\\') {
switch (ch =
(*pLexBuffer++))
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if ((marg =
sym_FindMacroArg
(ch -
'0')) !=
NULL) {
while
(*marg)
sym[i++] = *marg++;
ch = 0;
}
break;
case '@':
if ((marg =
sym_FindMacroArg
(-1)) !=
NULL) {
while
(*marg)
sym[i++] = *marg++;
ch = 0;
}
break;
}
} else
sym[i++] = ch;
}
sym[i] = 0;
index +=
symvaluetostring(&yylval.
tzString[index],
sym);
if (*pLexBuffer == '}')
pLexBuffer += 1;
else
yyerror("Missing }");
ch = 0;
}
if (ch)
yylval.tzString[index++] = ch;
}
if (index) {
yyleng = index;
yylval.tzString[index] = 0;
if (*pLexBuffer == '\n') {
while (yylval.tzString[--index] == ' ') {
yylval.tzString[index] = 0;
yyleng -= 1;
}
}
return (T_STRING);
} else if (*pLexBuffer == '\n') {
pLexBuffer += 1;
AtLineStart = 1;
yyleng = 1;
return ('\n');
} else if (*pLexBuffer == ',') {
pLexBuffer += 1;
yyleng = 1;
return (',');
} else {
yyerror("INTERNAL ERROR IN YYLEX");
return (0);
}
}
break;
}
yyerror("INTERNAL ERROR IN YYLEX");
return (0);
}
ULONG
yylex_NORMAL()
{
struct sLexString *pLongestFixed = NULL;
ULONG nFloatMask, nFloatLen;
ULONG linestart = AtLineStart;
AtLineStart = 0;
scanagain:
while (*pLexBuffer == ' ' || *pLexBuffer == '\t') {
linestart = 0;
pLexBuffer++;
}
if (*pLexBuffer == 0) {
// Reached the end of a file, macro, or rept.
if (yywrap() == 0) {
linestart = AtLineStart;
AtLineStart = 0;
goto scanagain;
}
}
// Try to match an identifier, macro argument (e.g. \1),
// or numeric literal.
yylex_GetFloatMaskAndFloatLen(&nFloatMask, &nFloatLen);
// Try to match a keyword or operator.
pLongestFixed = yylex_GetLongestFixed();
if (nFloatLen == 0 && pLongestFixed == NULL) {
// No keyword, identifier, operator, or numerical literal matches.
if (*pLexBuffer == '"') {
pLexBuffer++;
yylex_ReadQuotedString();
return T_STRING;
} else if (*pLexBuffer == '{') {
pLexBuffer++;
yylex_ReadBracketedSymbol(yylval.tzString, 0);
return T_STRING;
} else {
// It's not a keyword, operator, identifier, macro argument,
// numeric literal, string, or bracketed symbol, so just return
// the ASCII character.
if (*pLexBuffer == '\n')
AtLineStart = 1;
return *pLexBuffer++;
}
}
if (pLongestFixed == NULL || nFloatLen > pLongestFixed->nNameLength) {
// Longest match was an identifier, macro argument, or numeric literal.
struct sLexFloat *token = lexgetfloat(nFloatMask);
if (token->Callback) {
int done = token->Callback(pLexBuffer, nFloatLen);
if (!done)
goto scanagain;
}
pLexBuffer += nFloatLen;
if (token->nToken == T_ID && linestart) {
return T_LABEL;
} else {
return token->nToken;
}
}
// Longest match was a keyword or operator.
pLexBuffer += pLongestFixed->nNameLength;
return pLongestFixed->nToken;
}
