Hash :
62f20f9d
Author :
Date :
2011-03-09T15:10:18
Newlines in multi-line comments don't count as a newline. TRAC #15791 Issue=114 Signed-off-by: Daniel Koch Author: Nicolas Capens git-svn-id: https://angleproject.googlecode.com/svn/trunk@569 736b8ea6-26fd-11df-bfd4-992fa37f6226
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//
// scanner.c
//
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if 0
#include <ieeefp.h>
#else
#define isinff(x) (((*(int *)&(x) & 0x7f800000L)==0x7f800000L) && \
((*(int *)&(x) & 0x007fffffL)==0000000000L))
#endif
#include "compiler/preprocessor/slglobals.h"
#include "compiler/util.h"
typedef struct StringInputSrc {
InputSrc base;
char *p;
} StringInputSrc;
static int eof_scan(InputSrc *is, yystypepp * yylvalpp)
{
return EOF;
} // eof_scan
static void noop(InputSrc *in, int ch, yystypepp * yylvalpp) {}
static InputSrc eof_inputsrc = { 0, &eof_scan, &eof_scan, &noop };
static int byte_scan(InputSrc *, yystypepp * yylvalpp);
#define EOL_SY '\n'
#if defined(_MSC_VER)
#define DBG_BREAKPOINT() __asm int 3
#elif defined(_M_AMD64)
#define DBG_BREAKPOINT() assert(!"Dbg_Breakpoint");
#else
#define DBG_BREAKPOINT()
#endif
#if defined(_MSC_VER) && !defined(_M_AMD64)
__int64 RDTSC ( void ) {
__int64 v;
__asm __emit 0x0f
__asm __emit 0x31
__asm mov dword ptr v, eax
__asm mov dword ptr v+4, edx
return v;
}
#endif
int InitScanner(CPPStruct *cpp)
{
// Add various atoms needed by the CPP line scanner:
if (!InitCPP())
return 0;
cpp->mostRecentToken = 0;
cpp->tokenLoc = &cpp->ltokenLoc;
cpp->ltokenLoc.file = 0;
cpp->ltokenLoc.line = 0;
cpp->currentInput = &eof_inputsrc;
cpp->previous_token = '\n';
cpp->pastFirstStatement = 0;
return 1;
} // InitScanner
int FreeScanner(void)
{
return (FreeCPP());
}
/*
* str_getch()
* takes care of reading from multiple strings.
* returns the next-char from the input stream.
* returns EOF when the complete shader is parsed.
*/
static int str_getch(StringInputSrc *in)
{
for(;;){
if (*in->p){
if (*in->p == '\n') {
in->base.line++;
IncLineNumber();
}
return *in->p++;
}
if(++(cpp->PaWhichStr) < cpp->PaArgc){
free(in);
SetStringNumber(cpp->PaWhichStr);
SetLineNumber(1);
ScanFromString(cpp->PaArgv[cpp->PaWhichStr]);
in=(StringInputSrc*)cpp->currentInput;
continue;
}
else{
cpp->currentInput = in->base.prev;
cpp->PaWhichStr=0;
free(in);
return EOF;
}
}
} // str_getch
static void str_ungetch(StringInputSrc *in, int ch, yystypepp *type) {
if (in->p[-1] == ch)in->p--;
else {
*(in->p)='\0'; //this would take care of shifting to the previous string.
cpp->PaWhichStr--;
}
if (ch == '\n') {
in->base.line--;
DecLineNumber();
}
} // str_ungetch
int ScanFromString(const char *s)
{
StringInputSrc *in = malloc(sizeof(StringInputSrc));
memset(in, 0, sizeof(StringInputSrc));
in->p = (char*) s;
in->base.line = 1;
in->base.scan = byte_scan;
in->base.getch = (int (*)(InputSrc *, yystypepp *))str_getch;
in->base.ungetch = (void (*)(InputSrc *, int, yystypepp *))str_ungetch;
in->base.prev = cpp->currentInput;
cpp->currentInput = &in->base;
return 1;
} // ScanFromString;
///////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////// Floating point constants: /////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////
#define APPEND_CHAR_S(ch, str, len, max_len) \
if (len < max_len) { \
str[len++] = ch; \
} else if (!alreadyComplained) { \
CPPErrorToInfoLog("BUFFER OVERFLOW"); \
alreadyComplained = 1; \
}
/*
* lFloatConst() - Scan a floating point constant. Assumes that the scanner
* has seen at least one digit, followed by either a decimal '.' or the
* letter 'e'.
* ch - '.' or 'e'
* len - length of string already copied into yylvalpp->symbol_name.
*/
static int lFloatConst(int ch, int len, yystypepp * yylvalpp)
{
int alreadyComplained = 0;
assert((ch == '.') || (ch == 'e') || (ch == 'E'));
if (ch == '.') {
do {
APPEND_CHAR_S(ch, yylvalpp->symbol_name, len, MAX_SYMBOL_NAME_LEN);
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
} while (ch >= '0' && ch <= '9');
}
// Exponent:
if (ch == 'e' || ch == 'E') {
APPEND_CHAR_S(ch, yylvalpp->symbol_name, len, MAX_SYMBOL_NAME_LEN);
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '+') {
APPEND_CHAR_S(ch, yylvalpp->symbol_name, len, MAX_SYMBOL_NAME_LEN);
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
} else if (ch == '-') {
APPEND_CHAR_S(ch, yylvalpp->symbol_name, len, MAX_SYMBOL_NAME_LEN);
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
}
if (ch >= '0' && ch <= '9') {
while (ch >= '0' && ch <= '9') {
APPEND_CHAR_S(ch, yylvalpp->symbol_name, len, MAX_SYMBOL_NAME_LEN);
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
}
} else {
CPPErrorToInfoLog("EXPONENT INVALID");
}
}
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
assert(len <= MAX_SYMBOL_NAME_LEN);
yylvalpp->symbol_name[len] = '\0';
yylvalpp->sc_fval = (float) atof_dot(yylvalpp->symbol_name);
if (isinff(yylvalpp->sc_fval)) {
CPPErrorToInfoLog("FLOAT CONSTANT OVERFLOW");
}
return CPP_FLOATCONSTANT;
} // lFloatConst
///////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////// Normal Scanner //////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////
static int byte_scan(InputSrc *in, yystypepp * yylvalpp)
{
char string_val[MAX_STRING_LEN + 1];
int alreadyComplained = 0;
int len, ch, ii, ival = 0;
for (;;) {
yylvalpp->sc_int = 0;
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
while (ch == ' ' || ch == '\t' || ch == '\r') {
yylvalpp->sc_int = 1;
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
}
cpp->ltokenLoc.file = cpp->currentInput->name;
cpp->ltokenLoc.line = cpp->currentInput->line;
alreadyComplained = 0;
len = 0;
switch (ch) {
default:
return ch; // Single character token
case EOF:
return -1;
case 'A': case 'B': case 'C': case 'D': case 'E':
case 'F': case 'G': case 'H': case 'I': case 'J':
case 'K': case 'L': case 'M': case 'N': case 'O':
case 'P': case 'Q': case 'R': case 'S': case 'T':
case 'U': case 'V': case 'W': case 'X': case 'Y':
case 'Z': case '_':
case 'a': case 'b': case 'c': case 'd': case 'e':
case 'f': case 'g': case 'h': case 'i': case 'j':
case 'k': case 'l': case 'm': case 'n': case 'o':
case 'p': case 'q': case 'r': case 's': case 't':
case 'u': case 'v': case 'w': case 'x': case 'y':
case 'z':
do {
APPEND_CHAR_S(ch, yylvalpp->symbol_name, len, MAX_SYMBOL_NAME_LEN);
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
} while ((ch >= 'a' && ch <= 'z') ||
(ch >= 'A' && ch <= 'Z') ||
(ch >= '0' && ch <= '9') ||
ch == '_');
assert(len <= MAX_SYMBOL_NAME_LEN);
yylvalpp->symbol_name[len] = '\0';
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
yylvalpp->sc_ident = LookUpAddString(atable, yylvalpp->symbol_name);
return CPP_IDENTIFIER;
break;
case '0':
APPEND_CHAR_S(ch, yylvalpp->symbol_name, len, MAX_SYMBOL_NAME_LEN);
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == 'x' || ch == 'X') { // hexadecimal integer constants
APPEND_CHAR_S(ch, yylvalpp->symbol_name, len, MAX_SYMBOL_NAME_LEN);
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if ((ch >= '0' && ch <= '9') ||
(ch >= 'A' && ch <= 'F') ||
(ch >= 'a' && ch <= 'f'))
{
ival = 0;
do {
if ((ival <= 0x0fffffff) && (len < MAX_SYMBOL_NAME_LEN)) {
yylvalpp->symbol_name[len++] = ch;
if (ch >= '0' && ch <= '9') {
ii = ch - '0';
} else if (ch >= 'A' && ch <= 'F') {
ii = ch - 'A' + 10;
} else {
ii = ch - 'a' + 10;
}
ival = (ival << 4) | ii;
} else if (!alreadyComplained) {
CPPErrorToInfoLog("HEX CONSTANT OVERFLOW");
alreadyComplained = 1;
}
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
} while ((ch >= '0' && ch <= '9') ||
(ch >= 'A' && ch <= 'F') ||
(ch >= 'a' && ch <= 'f'));
} else {
CPPErrorToInfoLog("HEX CONSTANT INVALID");
}
assert(len <= MAX_SYMBOL_NAME_LEN);
yylvalpp->symbol_name[len] = '\0';
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
yylvalpp->sc_int = ival;
return CPP_INTCONSTANT;
} else if (ch >= '0' && ch <= '7') { // octal integer constants
ival = 0;
do {
if ((ival <= 0x1fffffff) && (len < MAX_SYMBOL_NAME_LEN)) {
yylvalpp->symbol_name[len++] = ch;
ii = ch - '0';
ival = (ival << 3) | ii;
} else if (!alreadyComplained) {
CPPErrorToInfoLog("OCT CONSTANT OVERFLOW");
alreadyComplained = 1;
}
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
} while (ch >= '0' && ch <= '7');
if (ch == '.' || ch == 'e' || ch == 'f' || ch == 'h' || ch == 'x'|| ch == 'E')
return lFloatConst(ch, len, yylvalpp);
assert(len <= MAX_SYMBOL_NAME_LEN);
yylvalpp->symbol_name[len] = '\0';
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
yylvalpp->sc_int = ival;
return CPP_INTCONSTANT;
} else {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
ch = '0';
}
// Fall through...
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
do {
APPEND_CHAR_S(ch, yylvalpp->symbol_name, len, MAX_SYMBOL_NAME_LEN);
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
} while (ch >= '0' && ch <= '9');
if (ch == '.' || ch == 'e' || ch == 'E') {
return lFloatConst(ch, len, yylvalpp);
} else {
assert(len <= MAX_SYMBOL_NAME_LEN);
yylvalpp->symbol_name[len] = '\0';
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
ival = 0;
for (ii = 0; ii < len; ii++) {
ch = yylvalpp->symbol_name[ii] - '0';
ival = ival*10 + ch;
if ((ival > 214748364) || (ival == 214748364 && ch >= 8)) {
CPPErrorToInfoLog("INTEGER CONSTANT OVERFLOW");
break;
}
}
yylvalpp->sc_int = ival;
if(ival==0)
strcpy(yylvalpp->symbol_name,"0");
return CPP_INTCONSTANT;
}
break;
case '-':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '-') {
return CPP_DEC_OP;
} else if (ch == '=') {
return CPP_SUB_ASSIGN;
} else {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '-';
}
case '+':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '+') {
return CPP_INC_OP;
} else if (ch == '=') {
return CPP_ADD_ASSIGN;
} else {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '+';
}
case '*':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '=') {
return CPP_MUL_ASSIGN;
} else {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '*';
}
case '%':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '=') {
return CPP_MOD_ASSIGN;
} else if (ch == '>'){
return CPP_RIGHT_BRACE;
} else {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '%';
}
case ':':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '>') {
return CPP_RIGHT_BRACKET;
} else {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return ':';
}
case '^':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '^') {
return CPP_XOR_OP;
} else {
if (ch == '=')
return CPP_XOR_ASSIGN;
else{
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '^';
}
}
case '=':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '=') {
return CPP_EQ_OP;
} else {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '=';
}
case '!':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '=') {
return CPP_NE_OP;
} else {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '!';
}
case '|':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '|') {
return CPP_OR_OP;
} else {
if (ch == '=')
return CPP_OR_ASSIGN;
else{
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '|';
}
}
case '&':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '&') {
return CPP_AND_OP;
} else {
if (ch == '=')
return CPP_AND_ASSIGN;
else{
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '&';
}
}
case '<':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '<') {
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if(ch == '=')
return CPP_LEFT_ASSIGN;
else{
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return CPP_LEFT_OP;
}
} else {
if (ch == '=') {
return CPP_LE_OP;
} else {
if (ch == '%')
return CPP_LEFT_BRACE;
else if (ch == ':')
return CPP_LEFT_BRACKET;
else{
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '<';
}
}
}
case '>':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '>') {
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if(ch == '=')
return CPP_RIGHT_ASSIGN;
else{
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return CPP_RIGHT_OP;
}
} else {
if (ch == '=') {
return CPP_GE_OP;
} else {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '>';
}
}
case '.':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch >= '0' && ch <= '9') {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return lFloatConst('.', 0, yylvalpp);
} else {
if (ch == '.') {
return -1; // Special EOF hack
} else {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '.';
}
}
case '/':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == '/') {
do {
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
} while (ch != '\n' && ch != EOF);
if (ch == EOF)
return -1;
return '\n';
} else if (ch == '*') {
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
do {
while (ch != '*') {
if (ch == EOF) {
CPPErrorToInfoLog("EOF IN COMMENT");
return -1;
}
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
}
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
if (ch == EOF) {
CPPErrorToInfoLog("EOF IN COMMENT");
return -1;
}
} while (ch != '/');
// Go try it again...
} else if (ch == '=') {
return CPP_DIV_ASSIGN;
} else {
cpp->currentInput->ungetch(cpp->currentInput, ch, yylvalpp);
return '/';
}
break;
case '"':
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
while (ch != '"' && ch != '\n' && ch != EOF) {
if (ch == '\\') {
CPPErrorToInfoLog("The line continuation character (\\) is not part of the OpenGL ES Shading Language");
return -1;
}
APPEND_CHAR_S(ch, string_val, len, MAX_STRING_LEN);
ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
};
assert(len <= MAX_STRING_LEN);
string_val[len] = '\0';
if (ch == '"') {
yylvalpp->sc_ident = LookUpAddString(atable, string_val);
return CPP_STRCONSTANT;
} else {
CPPErrorToInfoLog("EOL IN STRING");
return ERROR_SY;
}
break;
}
}
} // byte_scan
int yylex_CPP(char* buf, int maxSize)
{
yystypepp yylvalpp;
int token = '\n';
for(;;) {
char* tokenString = 0;
token = cpp->currentInput->scan(cpp->currentInput, &yylvalpp);
if(check_EOF(token))
return 0;
if (token < 0) {
// This check may need to be improved to support UTF-8
// characters in comments.
CPPErrorToInfoLog("preprocessor encountered non-ASCII character in shader source");
return 0;
}
if (token == '#') {
if (cpp->previous_token == '\n'|| cpp->previous_token == 0) {
token = readCPPline(&yylvalpp);
if(check_EOF(token))
return 0;
continue;
} else {
CPPErrorToInfoLog("preprocessor command must not be preceded by any other statement in that line");
return 0;
}
}
cpp->previous_token = token;
// expand macros
if (token == CPP_IDENTIFIER && MacroExpand(yylvalpp.sc_ident, &yylvalpp)) {
cpp->pastFirstStatement = 1;
continue;
}
if (token == '\n')
continue;
cpp->pastFirstStatement = 1;
if (token == CPP_IDENTIFIER) {
tokenString = GetStringOfAtom(atable,yylvalpp.sc_ident);
} else if (token == CPP_FLOATCONSTANT || token == CPP_INTCONSTANT){
tokenString = yylvalpp.symbol_name;
} else {
tokenString = GetStringOfAtom(atable,token);
}
if (tokenString) {
int len = strlen(tokenString);
cpp->tokensBeforeEOF = 1;
if (len >= maxSize) {
return maxSize;
} else if (len > 0) {
strcpy(buf, tokenString);
return len;
}
return 0;
}
}
return 0;
} // yylex
//Checks if the token just read is EOF or not.
int check_EOF(int token)
{
if(token==-1){
if(cpp->ifdepth >0){
CPPErrorToInfoLog("#endif missing!! Compilation stopped");
cpp->CompileError=1;
}
return 1;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////// End of scanner.c //////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////