diff options
Diffstat (limited to 'generic')
-rw-r--r-- | generic/tclCompExpr.c | 284 |
1 files changed, 260 insertions, 24 deletions
diff --git a/generic/tclCompExpr.c b/generic/tclCompExpr.c index 4fdd8de..90a6499 100644 --- a/generic/tclCompExpr.c +++ b/generic/tclCompExpr.c @@ -10,7 +10,7 @@ * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclCompExpr.c,v 1.39 2006/12/03 16:31:05 dgp Exp $ + * RCS: @(#) $Id: tclCompExpr.c,v 1.40 2006/12/04 22:33:28 dgp Exp $ */ #include "tclInt.h" @@ -34,7 +34,9 @@ typedef struct ExprNode { int token; /* Index of the Tcl_Tokens of this leaf node */ } ExprNode; -#else +#endif + +#if !defined(USE_EXPR_TOKENS) || !defined(PARSE_DIRECT_EXPR_TOKENS) /* * Integer codes indicating the form of an operand of an operator. @@ -153,7 +155,7 @@ static void GenerateTokens(ExprNode *nodes, Tcl_Parse *scratchPtr, static void ConvertTreeToTokens(Tcl_Interp *interp, CONST char *start, int numBytes, - OpNode *opTree, Tcl_Obj *litList, + OpNode *nodes, Tcl_Obj *litList, Tcl_Token *tokenPtr, Tcl_Parse *parsePtr); static int GenerateTokensForLiteral(CONST char *script, int numBytes, Tcl_Obj *litList, @@ -218,7 +220,7 @@ ParseExpr( Tcl_Obj *msg = NULL, *post = NULL; CONST int limit = 25; CONST char *mark = "_@_"; - static CONST unsigned char prec[80] = { + static CONST unsigned char prec[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 15, 15, 5, 16, 16, 16, 13, 13, 11, 10, 9, 6, 6, 14, 14, @@ -519,6 +521,7 @@ ParseExpr( * case accept it as an argument list for a function */ scanned = 0; lastWas = OT_EMPTY; + nodePtr[-1].left--; break; } msg = Tcl_ObjPrintf("empty subexpression at %s", mark); @@ -648,15 +651,20 @@ ParseExpr( } lastWas = OT_NONE; lastOpen = otherPtr - nodes; + otherPtr->left++; /* Create no node for a CLOSE_PAREN lexeme */ break; } - if ((lexeme == COMMA) && ((otherPtr->lexeme != OPEN_PAREN) - || (otherPtr[-1].lexeme != FUNCTION))) { - msg = Tcl_NewStringObj( - "unexpected \",\" outside function argument list", -1); - code = TCL_ERROR; - continue; + if (lexeme == COMMA) { + if ((otherPtr->lexeme != OPEN_PAREN) + || (otherPtr[-1].lexeme != FUNCTION)) { + msg = Tcl_NewStringObj( + "unexpected \",\" outside function argument list", + -1); + code = TCL_ERROR; + continue; + } + otherPtr->left++; } if ((lastWas >= 0) && (nodes[lastWas].lexeme == COLON)) { msg = Tcl_NewStringObj( @@ -916,10 +924,9 @@ ConvertTreeToTokens( break; case OT_LITERAL: scanned = GenerateTokensForLiteral(start, numBytes, - litList, nextLiteral, parsePtr); + litList, nextLiteral++, parsePtr); start +=scanned; numBytes -= scanned; - nextLiteral++; break; case OT_TOKENS: copied = CopyTokens(tokenPtr, parsePtr); @@ -976,10 +983,9 @@ ConvertTreeToTokens( switch (left) { case OT_LITERAL: scanned = GenerateTokensForLiteral(start, numBytes, - litList, nextLiteral, parsePtr); + litList, nextLiteral++, parsePtr); start +=scanned; numBytes -= scanned; - nextLiteral++; break; case OT_TOKENS: copied = CopyTokens(tokenPtr, parsePtr); @@ -1016,10 +1022,9 @@ ConvertTreeToTokens( switch (right) { case OT_LITERAL: scanned = GenerateTokensForLiteral(start, numBytes, - litList, nextLiteral, parsePtr); + litList, nextLiteral++, parsePtr); start +=scanned; numBytes -= scanned; - nextLiteral++; break; case OT_TOKENS: copied = CopyTokens(tokenPtr, parsePtr); @@ -1122,7 +1127,7 @@ Tcl_ParseExpr( int scanned = 0, code = TCL_OK, insertMark = 0; CONST char *mark = "_@_"; CONST int limit = 25; - static CONST unsigned char prec[80] = { + static CONST unsigned char prec[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 15, 15, 5, 16, 16, 16, 13, 13, 11, 10, 9, 6, 6, 14, 14, @@ -2015,6 +2020,7 @@ ParseLexeme( literal = Tcl_NewObj(); if (TclParseNumber(NULL, literal, NULL, start, numBytes, &end, TCL_PARSE_NO_WHITESPACE) == TCL_OK) { + TclInitStringRep(literal, start, end-start); *lexemePtr = NUMBER; if (literalPtr) { *literalPtr = literal; @@ -2181,7 +2187,7 @@ static void CompileSubExpr(Tcl_Interp *interp, CompileEnv *envPtr); #else -static void CompileExprTree(Tcl_Interp *interp, OpNode *opTree, +static void CompileExprTree(Tcl_Interp *interp, OpNode *nodes, Tcl_Obj *litList, Tcl_Obj *funcList, Tcl_Token *tokenPtr, int *convertPtr, CompileEnv *envPtr); @@ -2233,7 +2239,7 @@ TclCompileExpr( CompileEnv *envPtr) /* Holds resulting instructions. */ { #ifndef USE_EXPR_TOKENS - OpNode *opTree; /* Will point to the tree of operators */ + OpNode *opTree = NULL; /* Will point to the tree of operators */ Tcl_Obj *litList = Tcl_NewObj(); /* List to hold the literals */ Tcl_Obj *funcList = Tcl_NewObj(); /* List to hold the functon names*/ Tcl_Parse parse; /* Holds the Tcl_Tokens of substitutions */ @@ -2241,13 +2247,12 @@ TclCompileExpr( int code = ParseExpr(interp, script, numBytes, &opTree, litList, funcList, &parse); - if (code == TCL_OK) { int needsNumConversion = 1; /* TIP #280 : Track Lines within the expression */ - /* TODO: check this */ - TclAdvanceLines (&envPtr->line, script, parse.tokenPtr->start); + TclAdvanceLines (&envPtr->line, script, + script+TclParseAllWhiteSpace(script, numBytes)); /* Valid parse; compile the tree */ CompileExprTree(interp, opTree, litList, funcList, parse.tokenPtr, @@ -2343,17 +2348,248 @@ TclCompileExpr( *---------------------------------------------------------------------- */ +typedef struct JumpList { + JumpFixup jump; + int depth; + int offset; + int convert; + struct JumpList *next; +} JumpList; + static void CompileExprTree( Tcl_Interp *interp, - OpNode *opTree, + OpNode *nodes, Tcl_Obj *litList, Tcl_Obj *funcList, Tcl_Token *tokenPtr, int *convertPtr, CompileEnv *envPtr) { - /* TODO */ + OpNode *nodePtr = nodes; + int nextLiteral = 0, nextFunc = 0; + Tcl_Obj *literal; + JumpList *jumpPtr = NULL; + static CONST int instruction[] = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, INST_ADD, INST_SUB, 0, /* COMMA */ + INST_MULT, INST_DIV, INST_MOD, INST_LT, + INST_GT, INST_BITAND, INST_BITXOR, INST_BITOR, + 0, /* QUESTION */ 0, /* COLON */ + INST_LSHIFT, INST_RSHIFT, INST_LE, INST_GE, + INST_EQ, INST_NEQ, 0, /* AND */ 0, /* OR */ + INST_STR_EQ, INST_STR_NEQ, INST_EXPON, INST_LIST_IN, + INST_LIST_NOT_IN, 0, /* CLOSE_PAREN */ 0, /* END */ + 0, 0, 0, + 0, INST_UPLUS, INST_UMINUS, 0, /* FUNCTION */ + 0, /* START */ 0, /* OPEN_PAREN */ + INST_LNOT, INST_BITNOT + }; + + while (1) { + switch (NODE_TYPE & nodePtr->lexeme) { + case UNARY: + if (nodePtr->right > OT_NONE) { + int right = nodePtr->right; + nodePtr->right = OT_NONE; + if (nodePtr->lexeme == FUNCTION) { + Tcl_DString cmdName; + Tcl_Obj *funcName; + CONST char *p; + int length; + Tcl_DStringInit(&cmdName); + Tcl_DStringAppend(&cmdName, "tcl::mathfunc::", -1); + Tcl_ListObjIndex(NULL, funcList, nextFunc++, &funcName); + p = Tcl_GetStringFromObj(funcName, &length); + Tcl_DStringAppend(&cmdName, p, length); + TclEmitPush(TclRegisterNewNSLiteral(envPtr, + Tcl_DStringValue(&cmdName), + Tcl_DStringLength(&cmdName)), envPtr); + Tcl_DStringFree(&cmdName); + } + switch (right) { + case OT_EMPTY: + break; + case OT_LITERAL: + /* TODO: reduce constant expressions */ + Tcl_ListObjIndex(NULL, litList, nextLiteral++, &literal); + TclEmitPush( + TclAddLiteralObj(envPtr, literal, NULL), envPtr); + break; + case OT_TOKENS: + if (tokenPtr->type != TCL_TOKEN_WORD) { + Tcl_Panic("unexpected token type %d\n", tokenPtr->type); + } + TclCompileTokens(interp, tokenPtr+1, + tokenPtr->numComponents, envPtr); + tokenPtr += tokenPtr->numComponents + 1; + break; + default: + nodePtr = nodes + right; + } + } else { + if (nodePtr->lexeme == START) { + /* We're done */ + return; + } + if (nodePtr->lexeme == OPEN_PAREN) { + /* do nothing */ + } else if (nodePtr->lexeme == FUNCTION) { + int numWords = (nodePtr[1].left - OT_NONE) + 1; + if ( numWords < 255) { + TclEmitInstInt1(INST_INVOKE_STK1, numWords, envPtr); + } else { + TclEmitInstInt4(INST_INVOKE_STK4, numWords, envPtr); + } + *convertPtr = 1; + } else { + TclEmitOpcode(instruction[nodePtr->lexeme], envPtr); + *convertPtr = 0; + } + nodePtr = nodes + nodePtr->parent; + } + break; + case BINARY: + if (nodePtr->left > OT_NONE) { + int left = nodePtr->left; + nodePtr->left = OT_NONE; + /* TODO: reduce constant expressions */ + if (nodePtr->lexeme == QUESTION) { + JumpList *newJump = (JumpList *) + TclStackAlloc(interp, sizeof(JumpList)); + newJump->next = jumpPtr; + jumpPtr = newJump; + newJump = (JumpList *) + TclStackAlloc(interp, sizeof(JumpList)); + newJump->next = jumpPtr; + jumpPtr = newJump; + jumpPtr->depth = envPtr->currStackDepth; + *convertPtr = 1; + } else if ((nodePtr->lexeme == AND) + || (nodePtr->lexeme == OR)) { + JumpList *newJump = (JumpList *) + TclStackAlloc(interp, sizeof(JumpList)); + newJump->next = jumpPtr; + jumpPtr = newJump; + newJump = (JumpList *) + TclStackAlloc(interp, sizeof(JumpList)); + newJump->next = jumpPtr; + jumpPtr = newJump; + newJump = (JumpList *) + TclStackAlloc(interp, sizeof(JumpList)); + newJump->next = jumpPtr; + jumpPtr = newJump; + jumpPtr->depth = envPtr->currStackDepth; + } + switch (left) { + case OT_LITERAL: + Tcl_ListObjIndex(NULL, litList, nextLiteral++, &literal); + TclEmitPush( + TclAddLiteralObj(envPtr, literal, NULL), envPtr); + break; + case OT_TOKENS: + if (tokenPtr->type != TCL_TOKEN_WORD) { + Tcl_Panic("unexpected token type %d\n", tokenPtr->type); + } + TclCompileTokens(interp, tokenPtr+1, + tokenPtr->numComponents, envPtr); + tokenPtr += tokenPtr->numComponents + 1; + break; + default: + nodePtr = nodes + left; + } + } else if (nodePtr->right > OT_NONE) { + int right = nodePtr->right; + nodePtr->right = OT_NONE; + if (nodePtr->lexeme == QUESTION) { + TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, + &(jumpPtr->jump)); + } else if (nodePtr->lexeme == COLON) { + TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, + &(jumpPtr->next->jump)); + envPtr->currStackDepth = jumpPtr->depth; + jumpPtr->offset = (envPtr->codeNext - envPtr->codeStart); + jumpPtr->convert = *convertPtr; + *convertPtr = 1; + } else if (nodePtr->lexeme == AND) { + TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, + &(jumpPtr->jump)); + } else if (nodePtr->lexeme == OR) { + TclEmitForwardJump(envPtr, TCL_TRUE_JUMP, + &(jumpPtr->jump)); + } + switch (right) { + case OT_LITERAL: + Tcl_ListObjIndex(NULL, litList, nextLiteral++, &literal); + TclEmitPush( + TclAddLiteralObj(envPtr, literal, NULL), envPtr); + break; + case OT_TOKENS: + if (tokenPtr->type != TCL_TOKEN_WORD) { + Tcl_Panic("unexpected token type %d\n", tokenPtr->type); + } + TclCompileTokens(interp, tokenPtr+1, + tokenPtr->numComponents, envPtr); + tokenPtr += tokenPtr->numComponents + 1; + break; + default: + nodePtr = nodes + right; + } + } else { + if ((nodePtr->lexeme == COMMA) + || (nodePtr->lexeme == QUESTION)) { + /* do nothing */ + } else if (nodePtr->lexeme == COLON) { + if (TclFixupForwardJump(envPtr, &(jumpPtr->next->jump), + (envPtr->codeNext - envPtr->codeStart) + - jumpPtr->next->jump.codeOffset, 127)) { + jumpPtr->offset += 3; + } + TclFixupForwardJump(envPtr, &(jumpPtr->jump), + jumpPtr->offset - jumpPtr->jump.codeOffset, 127); + *convertPtr |= jumpPtr->convert; + envPtr->currStackDepth = jumpPtr->depth + 1; + jumpPtr = jumpPtr->next->next; + TclStackFree(interp); + TclStackFree(interp); + } else if (nodePtr->lexeme == AND) { + TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, + &(jumpPtr->next->jump)); + TclEmitPush(TclRegisterNewLiteral(envPtr, "1", 1), envPtr); + } else if (nodePtr->lexeme == OR) { + TclEmitForwardJump(envPtr, TCL_TRUE_JUMP, + &(jumpPtr->next->jump)); + TclEmitPush(TclRegisterNewLiteral(envPtr, "0", 1), envPtr); + } else { + TclEmitOpcode(instruction[nodePtr->lexeme], envPtr); + *convertPtr = 0; + } + if ((nodePtr->lexeme == AND) || (nodePtr->lexeme == OR)) { + TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, + &(jumpPtr->next->next->jump)); + TclFixupForwardJumpToHere(envPtr, + &(jumpPtr->next->jump), 127); + if (TclFixupForwardJumpToHere(envPtr, + &(jumpPtr->jump), 127)) { + jumpPtr->next->next->jump.codeOffset += 3; + } + TclEmitPush(TclRegisterNewLiteral(envPtr, + (nodePtr->lexeme == AND) ? "0" : "1", 1), envPtr); + TclFixupForwardJumpToHere(envPtr, + &(jumpPtr->next->next->jump), 127); + *convertPtr = 0; + envPtr->currStackDepth = jumpPtr->depth + 1; + jumpPtr = jumpPtr->next->next->next; + TclStackFree(interp); + TclStackFree(interp); + TclStackFree(interp); + } + nodePtr = nodes + nodePtr->parent; + } + break; + } + } } #endif |