ref: eb4f790a827c7758182a3750eb717332b30d475f
dir: /src/asm/lexer.c/
#include "asm/asm.h"
#include "asm/lexer.h"
#include "asm/types.h"
#include "asm/main.h"
#include "asm/rpn.h"
#include "asm/fstack.h"
#include "asmy.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
struct sLexString {
char *tzName;
ULONG nToken;
ULONG nNameLength;
struct sLexString *pNext;
};
#define pLexBuffer (pCurrentBuffer->pBuffer)
#define nLexBufferLeng (pCurrentBuffer->nBufferSize)
#define SAFETYMARGIN 1024
extern ULONG symvaluetostring(char *dest, char *s);
struct sLexFloat tLexFloat[32];
struct sLexString *tLexHash[LEXHASHSIZE];
YY_BUFFER_STATE pCurrentBuffer;
ULONG yyleng;
ULONG nLexMaxLeng;
ULONG tFloatingSecondChar[256];
ULONG tFloatingFirstChar[256];
ULONG tFloatingChars[256];
ULONG nFloating;
enum eLexerState lexerstate = LEX_STATE_NORMAL;
#define AtLineStart pCurrentBuffer->oAtLineStart
#ifdef __GNUC__
void
strupr(char *s)
{
while (*s) {
*s = toupper(*s);
s += 1;
}
}
void
strlwr(char *s)
{
while (*s) {
*s = tolower(*s);
s += 1;
}
}
#endif
void
yyskipbytes(ULONG count)
{
pLexBuffer += count;
}
void
yyunputbytes(ULONG count)
{
pLexBuffer -= count;
}
void
yyunput(char c)
{
*(--pLexBuffer) = c;
}
void
yyunputstr(char *s)
{
SLONG i;
i = strlen(s) - 1;
while (i >= 0)
yyunput(s[i--]);
}
void
yy_switch_to_buffer(YY_BUFFER_STATE buf)
{
pCurrentBuffer = buf;
}
void
yy_set_state(enum eLexerState i)
{
lexerstate = i;
}
void
yy_delete_buffer(YY_BUFFER_STATE buf)
{
free(buf->pBufferStart - SAFETYMARGIN);
free(buf);
}
YY_BUFFER_STATE
yy_scan_bytes(char *mem, ULONG size)
{
YY_BUFFER_STATE pBuffer;
if ((pBuffer =
(YY_BUFFER_STATE) malloc(sizeof(struct yy_buffer_state))) !=
NULL) {
if ((pBuffer->pBuffer = pBuffer->pBufferStart =
(char *) malloc(size + 1 + SAFETYMARGIN)) != NULL) {
pBuffer->pBuffer += SAFETYMARGIN;
pBuffer->pBufferStart += SAFETYMARGIN;
memcpy(pBuffer->pBuffer, mem, size);
pBuffer->nBufferSize = size;
pBuffer->oAtLineStart = 1;
pBuffer->pBuffer[size] = 0;
return (pBuffer);
}
}
fatalerror("Out of memory!");
return (NULL);
}
YY_BUFFER_STATE
yy_create_buffer(FILE * f)
{
YY_BUFFER_STATE pBuffer;
if ((pBuffer =
(YY_BUFFER_STATE) malloc(sizeof(struct yy_buffer_state))) !=
NULL) {
ULONG size;
fseek(f, 0, SEEK_END);
size = ftell(f);
fseek(f, 0, SEEK_SET);
if ((pBuffer->pBuffer = pBuffer->pBufferStart =
(char *) malloc(size + 2 + SAFETYMARGIN)) != NULL) {
char *mem;
ULONG instring = 0;
pBuffer->pBuffer += SAFETYMARGIN;
pBuffer->pBufferStart += SAFETYMARGIN;
size = fread(pBuffer->pBuffer, sizeof(UBYTE), size, f);
pBuffer->pBuffer[size] = '\n';
pBuffer->pBuffer[size + 1] = 0;
pBuffer->nBufferSize = size + 1;
mem = pBuffer->pBuffer;
while (*mem) {
if (*mem == '\"')
instring = 1 - instring;
if (instring) {
mem += 1;
} else {
if ((mem[0] == 10 && mem[1] == 13)
|| (mem[0] == 13 && mem[1] == 10)) {
mem[0] = ' ';
mem[1] = '\n';
mem += 2;
} else if (mem[0] == 10 || mem[0] == 13) {
mem[0] = '\n';
mem += 1;
} else if (mem[0] == '\n'
&& mem[1] == '*') {
mem += 1;
while (!
(*mem == '\n'
|| *mem == '\0'))
*mem++ = ' ';
} else if (*mem == ';') {
while (!
(*mem == '\n'
|| *mem == '\0'))
*mem++ = ' ';
} else
mem += 1;
}
}
pBuffer->oAtLineStart = 1;
return (pBuffer);
}
}
fatalerror("Out of memory!");
return (NULL);
}
ULONG
lex_FloatAlloc(struct sLexFloat * tok)
{
tLexFloat[nFloating] = (*tok);
return (1 << (nFloating++));
}
void
lex_FloatDeleteRange(ULONG id, UWORD start, UWORD end)
{
while (start <= end) {
tFloatingChars[start] &= ~id;
start += 1;
}
}
void
lex_FloatAddRange(ULONG id, UWORD start, UWORD end)
{
while (start <= end) {
tFloatingChars[start] |= id;
start += 1;
}
}
void
lex_FloatDeleteFirstRange(ULONG id, UWORD start, UWORD end)
{
while (start <= end) {
tFloatingFirstChar[start] &= ~id;
start += 1;
}
}
void
lex_FloatAddFirstRange(ULONG id, UWORD start, UWORD end)
{
while (start <= end) {
tFloatingFirstChar[start] |= id;
start += 1;
}
}
void
lex_FloatDeleteSecondRange(ULONG id, UWORD start, UWORD end)
{
while (start <= end) {
tFloatingSecondChar[start] &= ~id;
start += 1;
}
}
void
lex_FloatAddSecondRange(ULONG id, UWORD start, UWORD end)
{
while (start <= end) {
tFloatingSecondChar[start] |= id;
start += 1;
}
}
struct sLexFloat *
lexgetfloat(ULONG id)
{
ULONG r = 0, mask = 1;
if (id == 0)
return (NULL);
while ((id & mask) == 0) {
mask <<= 1;
r += 1;
}
return (&tLexFloat[r]);
}
ULONG
lexcalchash(char *s)
{
ULONG r = 0;
while (*s) {
r = ((r << 1) + (toupper(*s))) % LEXHASHSIZE;
s += 1;
}
return (r);
}
void
lex_Init(void)
{
ULONG i;
for (i = 0; i < LEXHASHSIZE; i += 1) {
tLexHash[i] = NULL;
}
for (i = 0; i < 256; i += 1) {
tFloatingFirstChar[i] = 0;
tFloatingSecondChar[i] = 0;
tFloatingChars[i] = 0;
}
nLexMaxLeng = 0;
nFloating = 0;
}
void
lex_AddStrings(struct sLexInitString * lex)
{
while (lex->tzName) {
struct sLexString **ppHash;
ULONG hash;
ppHash = &tLexHash[hash = lexcalchash(lex->tzName)];
while (*ppHash)
ppHash = &((*ppHash)->pNext);
//printf("%s has hashvalue %d\n", lex->tzName, hash);
if (((*ppHash) =
(struct sLexString *) malloc(sizeof(struct sLexString))) !=
NULL) {
if (((*ppHash)->tzName =
(char *) strdup(lex->tzName)) != NULL) {
(*ppHash)->nNameLength = strlen(lex->tzName);
(*ppHash)->nToken = lex->nToken;
(*ppHash)->pNext = NULL;
strupr((*ppHash)->tzName);
if ((*ppHash)->nNameLength > nLexMaxLeng)
nLexMaxLeng = (*ppHash)->nNameLength;
} else
fatalerror("Out of memory!");
} else
fatalerror("Out of memory!");
lex += 1;
}
}
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 (strncasecmp
(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);
}