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author | dgp <dgp@noemail.net> | 2013-07-16 17:21:12 (GMT) |
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committer | dgp <dgp@noemail.net> | 2013-07-16 17:21:12 (GMT) |
commit | 6774daf1bcf1214214a633084066e785b10ec23d (patch) | |
tree | 3f7a4d988bee2a2550efcfed690bdf4efb582d5e /generic/tclEnsemble.c | |
parent | 2c9cc940d327ce96c91b71ed8d9b0bc6472fdcc8 (diff) | |
download | tcl-6774daf1bcf1214214a633084066e785b10ec23d.zip tcl-6774daf1bcf1214214a633084066e785b10ec23d.tar.gz tcl-6774daf1bcf1214214a633084066e785b10ec23d.tar.bz2 |
Simplify the ensemble subcommand compile. There's no need to be
crafting synthetic Tcl_Parse and copying tokens. Some pointer shifts will do.
FossilOrigin-Name: c094eb7c533cb5ba6d2b812688fe1aa6ace83288
Diffstat (limited to 'generic/tclEnsemble.c')
-rw-r--r-- | generic/tclEnsemble.c | 70 |
1 files changed, 15 insertions, 55 deletions
diff --git a/generic/tclEnsemble.c b/generic/tclEnsemble.c index 864283b..e4f96c0 100644 --- a/generic/tclEnsemble.c +++ b/generic/tclEnsemble.c @@ -3029,12 +3029,6 @@ TclCompileEnsemble( return ourResult; } -/* - * How to compile a subcommand using its own command compiler. To do that, we - * have to perform some trickery to rewrite the arguments, as compilers *must* - * have parse tokens that refer to addresses in the original script. - */ - static int CompileToCompiledCommand( Tcl_Interp *interp, @@ -3043,10 +3037,8 @@ CompileToCompiledCommand( Command *cmdPtr, CompileEnv *envPtr) /* Holds resulting instructions. */ { - Tcl_Parse synthetic; - Tcl_Token *tokenPtr; int result, i; - int savedNumCmds = envPtr->numCommands; + Tcl_Token *saveTokenPtr = parsePtr->tokenPtr; int savedStackDepth = envPtr->currStackDepth; unsigned savedCodeNext = envPtr->codeNext - envPtr->codeStart; DefineLineInformation; @@ -3055,47 +3047,17 @@ CompileToCompiledCommand( return TCL_ERROR; } - TclParseInit(interp, NULL, 0, &synthetic); - synthetic.numWords = parsePtr->numWords - depth + 1; - TclGrowParseTokenArray(&synthetic, 2); - synthetic.numTokens = 2; - - /* - * Now we have the space to work in, install something rewritten. The - * first word will "officially" be the bytes of the structured ensemble - * name. That's technically wrong, but nobody will care; we just need - * *something* here... - */ - - synthetic.tokenPtr[0].type = TCL_TOKEN_SIMPLE_WORD; - synthetic.tokenPtr[0].start = parsePtr->tokenPtr[0].start; - synthetic.tokenPtr[0].numComponents = 1; - synthetic.tokenPtr[1].type = TCL_TOKEN_TEXT; - synthetic.tokenPtr[1].start = parsePtr->tokenPtr[0].start; - synthetic.tokenPtr[1].numComponents = 0; - for (i=0,tokenPtr=parsePtr->tokenPtr ; i<depth ; i++) { - int sclen = (tokenPtr->start - synthetic.tokenPtr[0].start) - + tokenPtr->size; - - synthetic.tokenPtr[0].size = sclen; - synthetic.tokenPtr[1].size = sclen; - tokenPtr = TokenAfter(tokenPtr); - } - /* - * Copy over the real argument tokens. + * Advance parsePtr->tokenPtr so that it points at the last subcommand. + * This will be wrong, but it will not matter, and it will put the + * tokens for the arguments in the right place without the needed to + * allocate a synthetic Tcl_Parse struct, or copy tokens around. */ - for (i=1; i<synthetic.numWords; i++) { - int toCopy; - - toCopy = tokenPtr->numComponents + 1; - TclGrowParseTokenArray(&synthetic, toCopy); - memcpy(synthetic.tokenPtr + synthetic.numTokens, tokenPtr, - sizeof(Tcl_Token) * toCopy); - synthetic.numTokens += toCopy; - tokenPtr = TokenAfter(tokenPtr); + for (i = 0; i < depth - 1; i++) { + parsePtr->tokenPtr = TokenAfter(parsePtr->tokenPtr); } + parsePtr->numWords -= (depth - 1); /* * Shift the line information arrays to account for different word @@ -3109,7 +3071,7 @@ CompileToCompiledCommand( * Hand off compilation to the subcommand compiler. At last! */ - result = cmdPtr->compileProc(interp, &synthetic, cmdPtr, envPtr); + result = cmdPtr->compileProc(interp, parsePtr, cmdPtr, envPtr); /* * Undo the shift. @@ -3118,22 +3080,20 @@ CompileToCompiledCommand( mapPtr->loc[eclIndex].line -= (depth - 1); mapPtr->loc[eclIndex].next -= (depth - 1); + parsePtr->numWords += (depth - 1); + parsePtr->tokenPtr = saveTokenPtr; + /* - * If our target fails to compile, revert the number of commands and the - * pointer to the place to issue the next instruction. [Bug 3600328] + * If our target failed to compile, revert any data from failed partial + * compiles. Note that envPtr->numCommands need not be checked because + * we avoid compiling subcommands that recursively call TclCompileScript(). */ if (result != TCL_OK) { - envPtr->numCommands = savedNumCmds; envPtr->currStackDepth = savedStackDepth; envPtr->codeNext = envPtr->codeStart + savedCodeNext; } - /* - * Clean up if necessary. - */ - - Tcl_FreeParse(&synthetic); return result; } |