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80 // For recording and playing back the stream of tokens in a macro definition.
84 #define _CRT_SECURE_NO_WARNINGS
85 #define snprintf sprintf_s
94 #include "PpContext.h"
99 void TPpContext::lAddByte(TokenStream *fTok, unsigned char fVal)
101 fTok->data.push_back(fVal);
105 * Get the next byte from a stream.
107 int TPpContext::lReadByte(TokenStream *pTok)
109 if (pTok->current < pTok->data.size())
110 return pTok->data[pTok->current++];
112 return tInput::endOfInput;
115 void TPpContext::lUnreadByte(TokenStream *pTok)
117 if (pTok->current > 0)
122 * Add a token to the end of a list for later playback.
124 void TPpContext::RecordToken(TokenStream *pTok, int token, TPpToken* ppToken)
130 lAddByte(pTok, (unsigned char)((token & 0x7f) + 0x80));
132 lAddByte(pTok, (unsigned char)(token & 0x7f));
136 case CPP_STRCONSTANT:
137 s = GetAtomString(ppToken->atom);
139 lAddByte(pTok, (unsigned char) *s++);
142 case CPP_INTCONSTANT:
143 case CPP_UINTCONSTANT:
144 case CPP_FLOATCONSTANT:
145 case CPP_DOUBLECONSTANT:
148 lAddByte(pTok, (unsigned char) *str);
159 * Reset a token stream in preperation for reading.
161 void TPpContext::RewindTokenStream(TokenStream *pTok)
167 * Read the next token from a token stream (not the source stream, but stream used to hold a tokenized macro).
169 int TPpContext::ReadToken(TokenStream *pTok, TPpToken *ppToken)
171 char tokenText[TPpToken::maxTokenLength + 1];
175 ltoken = lReadByte(pTok);
176 ppToken->loc = parseContext.getCurrentLoc();
181 if (lReadByte(pTok) == '#') {
182 parseContext.requireProfile(ppToken->loc, ~EEsProfile, "token pasting (##)");
183 parseContext.profileRequires(ppToken->loc, ~EEsProfile, 130, 0, "token pasting (##)");
184 parseContext.error(ppToken->loc, "token pasting not implemented (internal error)", "##", "");
185 //return CPP_TOKEN_PASTE;
186 return ReadToken(pTok, ppToken);
190 case CPP_STRCONSTANT:
192 case CPP_FLOATCONSTANT:
193 case CPP_DOUBLECONSTANT:
194 case CPP_INTCONSTANT:
195 case CPP_UINTCONSTANT:
197 ch = lReadByte(pTok);
199 if (len < TPpToken::maxTokenLength) {
200 tokenText[len] = (char)ch;
202 ch = lReadByte(pTok);
204 parseContext.error(ppToken->loc, "token too long", "", "");
212 case CPP_STRCONSTANT:
213 ppToken->atom = LookUpAddString(tokenText);
215 case CPP_FLOATCONSTANT:
216 case CPP_DOUBLECONSTANT:
217 strcpy(ppToken->name, tokenText);
218 ppToken->dval = atof(ppToken->name);
220 case CPP_INTCONSTANT:
221 case CPP_UINTCONSTANT:
222 strcpy(ppToken->name, tokenText);
223 if (len > 0 && tokenText[0] == '0') {
224 if (len > 1 && (tokenText[1] == 'x' || tokenText[1] == 'X'))
225 ppToken->ival = strtol(ppToken->name, 0, 16);
227 ppToken->ival = strtol(ppToken->name, 0, 8);
229 ppToken->ival = atoi(ppToken->name);
237 int TPpContext::tTokenInput::scan(TPpToken* ppToken)
239 return pp->ReadToken(tokens, ppToken);
242 void TPpContext::pushTokenStreamInput(TokenStream* ts)
244 pushInput(new tTokenInput(this, ts));
245 RewindTokenStream(ts);
248 int TPpContext::tUngotTokenInput::scan(TPpToken* ppToken)
260 void TPpContext::UngetToken(int token, TPpToken* ppToken)
262 pushInput(new tUngotTokenInput(this, token, ppToken));
265 } // end namespace glslang