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Diffstat (limited to 'generic/tclCompile.h')
| -rw-r--r-- | generic/tclCompile.h | 981 |
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diff --git a/generic/tclCompile.h b/generic/tclCompile.h deleted file mode 100644 index 4a718fd..0000000 --- a/generic/tclCompile.h +++ /dev/null @@ -1,981 +0,0 @@ -/* - * tclCompile.h -- - * - * Copyright (c) 1996-1998 Sun Microsystems, Inc. - * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclCompile.h,v 1.10 1999/04/16 00:46:45 stanton Exp $ - */ - -#ifndef _TCLCOMPILATION -#define _TCLCOMPILATION 1 - -#ifndef _TCLINT -#include "tclInt.h" -#endif /* _TCLINT */ - -#ifdef BUILD_tcl -# undef TCL_STORAGE_CLASS -# define TCL_STORAGE_CLASS DLLEXPORT -#endif - -/* - *------------------------------------------------------------------------ - * Variables related to compilation. These are used in tclCompile.c, - * tclExecute.c, tclBasic.c, and their clients. - *------------------------------------------------------------------------ - */ - -/* - * Variable that denotes the command name Tcl object type. Objects of this - * type cache the Command pointer that results from looking up command names - * in the command hashtable. - */ - -extern Tcl_ObjType tclCmdNameType; - -/* - * Variable that controls whether compilation tracing is enabled and, if so, - * what level of tracing is desired: - * 0: no compilation tracing - * 1: summarize compilation of top level cmds and proc bodies - * 2: display all instructions of each ByteCode compiled - * This variable is linked to the Tcl variable "tcl_traceCompile". - */ - -extern int tclTraceCompile; - -/* - * Variable that controls whether execution tracing is enabled and, if so, - * what level of tracing is desired: - * 0: no execution tracing - * 1: trace invocations of Tcl procs only - * 2: trace invocations of all (not compiled away) commands - * 3: display each instruction executed - * This variable is linked to the Tcl variable "tcl_traceExec". - */ - -extern int tclTraceExec; - -/* - *------------------------------------------------------------------------ - * Data structures related to compilation. - *------------------------------------------------------------------------ - */ - -/* - * The structure used to implement Tcl "exceptions" (exceptional returns): - * for example, those generated in loops by the break and continue commands, - * and those generated by scripts and caught by the catch command. This - * ExceptionRange structure describes a range of code (e.g., a loop body), - * the kind of exceptions (e.g., a break or continue) that might occur, and - * the PC offsets to jump to if a matching exception does occur. Exception - * ranges can nest so this structure includes a nesting level that is used - * at runtime to find the closest exception range surrounding a PC. For - * example, when a break command is executed, the ExceptionRange structure - * for the most deeply nested loop, if any, is found and used. These - * structures are also generated for the "next" subcommands of for loops - * since a break there terminates the for command. This means a for command - * actually generates two LoopInfo structures. - */ - -typedef enum { - LOOP_EXCEPTION_RANGE, /* Exception's range is part of a loop. - * Break and continue "exceptions" cause - * jumps to appropriate PC offsets. */ - CATCH_EXCEPTION_RANGE /* Exception's range is controlled by a - * catch command. Errors in the range cause - * a jump to a catch PC offset. */ -} ExceptionRangeType; - -typedef struct ExceptionRange { - ExceptionRangeType type; /* The kind of ExceptionRange. */ - int nestingLevel; /* Static depth of the exception range. - * Used to find the most deeply-nested - * range surrounding a PC at runtime. */ - int codeOffset; /* Offset of the first instruction byte of - * the code range. */ - int numCodeBytes; /* Number of bytes in the code range. */ - int breakOffset; /* If LOOP_EXCEPTION_RANGE, the target PC - * offset for a break command in the range. */ - int continueOffset; /* If LOOP_EXCEPTION_RANGE and not -1, the - * target PC offset for a continue command in - * the code range. Otherwise, ignore this range - * when processing a continue command. */ - int catchOffset; /* If a CATCH_EXCEPTION_RANGE, the target PC - * offset for any "exception" in range. */ -} ExceptionRange; - -/* - * Structure used to map between instruction pc and source locations. It - * defines for each compiled Tcl command its code's starting offset and - * its source's starting offset and length. Note that the code offset - * increases monotonically: that is, the table is sorted in code offset - * order. The source offset is not monotonic. - */ - -typedef struct CmdLocation { - int codeOffset; /* Offset of first byte of command code. */ - int numCodeBytes; /* Number of bytes for command's code. */ - int srcOffset; /* Offset of first char of the command. */ - int numSrcBytes; /* Number of command source chars. */ -} CmdLocation; - -/* - * CompileProcs need the ability to record information during compilation - * that can be used by bytecode instructions during execution. The AuxData - * structure provides this "auxiliary data" mechanism. An arbitrary number - * of these structures can be stored in the ByteCode record (during - * compilation they are stored in a CompileEnv structure). Each AuxData - * record holds one word of client-specified data (often a pointer) and is - * given an index that instructions can later use to look up the structure - * and its data. - * - * The following definitions declare the types of procedures that are called - * to duplicate or free this auxiliary data when the containing ByteCode - * objects are duplicated and freed. Pointers to these procedures are kept - * in the AuxData structure. - */ - -typedef ClientData (AuxDataDupProc) _ANSI_ARGS_((ClientData clientData)); -typedef void (AuxDataFreeProc) _ANSI_ARGS_((ClientData clientData)); - -/* - * We define a separate AuxDataType struct to hold type-related information - * for the AuxData structure. This separation makes it possible for clients - * outside of the TCL core to manipulate (in a limited fashion!) AuxData; - * for example, it makes it possible to pickle and unpickle AuxData structs. - */ - -typedef struct AuxDataType { - char *name; /* the name of the type. Types can be - * registered and found by name */ - AuxDataDupProc *dupProc; /* Callback procedure to invoke when the - * aux data is duplicated (e.g., when the - * ByteCode structure containing the aux - * data is duplicated). NULL means just - * copy the source clientData bits; no - * proc need be called. */ - AuxDataFreeProc *freeProc; /* Callback procedure to invoke when the - * aux data is freed. NULL means no - * proc need be called. */ -} AuxDataType; - -/* - * The definition of the AuxData structure that holds information created - * during compilation by CompileProcs and used by instructions during - * execution. - */ - -typedef struct AuxData { - AuxDataType *type; /* pointer to the AuxData type associated with - * this ClientData. */ - ClientData clientData; /* The compilation data itself. */ -} AuxData; - -/* - * Structure defining the compilation environment. After compilation, fields - * describing bytecode instructions are copied out into the more compact - * ByteCode structure defined below. - */ - -#define COMPILEENV_INIT_CODE_BYTES 250 -#define COMPILEENV_INIT_NUM_OBJECTS 60 -#define COMPILEENV_INIT_EXCEPT_RANGES 5 -#define COMPILEENV_INIT_CMD_MAP_SIZE 40 -#define COMPILEENV_INIT_AUX_DATA_SIZE 5 - -typedef struct CompileEnv { - Interp *iPtr; /* Interpreter containing the code being - * compiled. Commands and their compile - * procs are specific to an interpreter so - * the code emitted will depend on the - * interpreter. */ - char *source; /* The source string being compiled by - * SetByteCodeFromAny. This pointer is not - * owned by the CompileEnv and must not be - * freed or changed by it. */ - int numSrcBytes; /* Number of bytes in source. */ - Proc *procPtr; /* If a procedure is being compiled, a - * pointer to its Proc structure; otherwise - * NULL. Used to compile local variables. - * Set from information provided by - * ObjInterpProc in tclProc.c. */ - int numCommands; /* Number of commands compiled. */ - int exceptDepth; /* Current exception range nesting level; - * -1 if not in any range currently. */ - int maxExceptDepth; /* Max nesting level of exception ranges; - * -1 if no ranges have been compiled. */ - int maxStackDepth; /* Maximum number of stack elements needed - * to execute the code. Set by compilation - * procedures before returning. */ - LiteralTable localLitTable; /* Contains LiteralEntry's describing - * all Tcl objects referenced by this - * compiled code. Indexed by the string - * representations of the literals. Used to - * avoid creating duplicate objects. */ - int exprIsJustVarRef; /* Set 1 if the expression last compiled by - * TclCompileExpr consisted of just a - * variable reference as in the expression - * of "if $b then...". Otherwise 0. Used - * to implement expr's 2 level substitution - * semantics properly. */ - int exprIsComparison; /* Set 1 if the top-level operator in the - * expression last compiled is a comparison. - * Otherwise 0. If 1, since the operands - * might be strings, the expr is compiled - * out-of-line to implement expr's 2 level - * substitution semantics properly. */ - unsigned char *codeStart; /* Points to the first byte of the code. */ - unsigned char *codeNext; /* Points to next code array byte to use. */ - unsigned char *codeEnd; /* Points just after the last allocated - * code array byte. */ - int mallocedCodeArray; /* Set 1 if code array was expanded - * and codeStart points into the heap.*/ - LiteralEntry *literalArrayPtr; - /* Points to start of LiteralEntry array. */ - int literalArrayNext; /* Index of next free object array entry. */ - int literalArrayEnd; /* Index just after last obj array entry. */ - int mallocedLiteralArray; /* 1 if object array was expanded and - * objArray points into the heap, else 0. */ - ExceptionRange *exceptArrayPtr; - /* Points to start of the ExceptionRange - * array. */ - int exceptArrayNext; /* Next free ExceptionRange array index. - * exceptArrayNext is the number of ranges - * and (exceptArrayNext-1) is the index of - * the current range's array entry. */ - int exceptArrayEnd; /* Index after the last ExceptionRange - * array entry. */ - int mallocedExceptArray; /* 1 if ExceptionRange array was expanded - * and exceptArrayPtr points in heap, - * else 0. */ - CmdLocation *cmdMapPtr; /* Points to start of CmdLocation array. - * numCommands is the index of the next - * entry to use; (numCommands-1) is the - * entry index for the last command. */ - int cmdMapEnd; /* Index after last CmdLocation entry. */ - int mallocedCmdMap; /* 1 if command map array was expanded and - * cmdMapPtr points in the heap, else 0. */ - AuxData *auxDataArrayPtr; /* Points to auxiliary data array start. */ - int auxDataArrayNext; /* Next free compile aux data array index. - * auxDataArrayNext is the number of aux - * data items and (auxDataArrayNext-1) is - * index of current aux data array entry. */ - int auxDataArrayEnd; /* Index after last aux data array entry. */ - int mallocedAuxDataArray; /* 1 if aux data array was expanded and - * auxDataArrayPtr points in heap else 0. */ - unsigned char staticCodeSpace[COMPILEENV_INIT_CODE_BYTES]; - /* Initial storage for code. */ - LiteralEntry staticLiteralSpace[COMPILEENV_INIT_NUM_OBJECTS]; - /* Initial storage of LiteralEntry array. */ - ExceptionRange staticExceptArraySpace[COMPILEENV_INIT_EXCEPT_RANGES]; - /* Initial ExceptionRange array storage. */ - CmdLocation staticCmdMapSpace[COMPILEENV_INIT_CMD_MAP_SIZE]; - /* Initial storage for cmd location map. */ - AuxData staticAuxDataArraySpace[COMPILEENV_INIT_AUX_DATA_SIZE]; - /* Initial storage for aux data array. */ -} CompileEnv; - -/* - * The structure defining the bytecode instructions resulting from compiling - * a Tcl script. Note that this structure is variable length: a single heap - * object is allocated to hold the ByteCode structure immediately followed - * by the code bytes, the literal object array, the ExceptionRange array, - * the CmdLocation map, and the compilation AuxData array. - */ - -/* - * A PRECOMPILED bytecode struct is one that was generated from a compiled - * image rather than implicitly compiled from source - */ -#define TCL_BYTECODE_PRECOMPILED 0x0001 - -typedef struct ByteCode { - TclHandle interpHandle; /* Handle for interpreter containing the - * compiled code. Commands and their compile - * procs are specific to an interpreter so the - * code emitted will depend on the - * interpreter. */ - int compileEpoch; /* Value of iPtr->compileEpoch when this - * ByteCode was compiled. Used to invalidate - * code when, e.g., commands with compile - * procs are redefined. */ - Namespace *nsPtr; /* Namespace context in which this code - * was compiled. If the code is executed - * if a different namespace, it must be - * recompiled. */ - int nsEpoch; /* Value of nsPtr->resolverEpoch when this - * ByteCode was compiled. Used to invalidate - * code when new namespace resolution rules - * are put into effect. */ - int refCount; /* Reference count: set 1 when created - * plus 1 for each execution of the code - * currently active. This structure can be - * freed when refCount becomes zero. */ - unsigned int flags; /* flags describing state for the codebyte. - * this variable holds ORed values from the - * TCL_BYTECODE_ masks defined above */ - char *source; /* The source string from which this - * ByteCode was compiled. Note that this - * pointer is not owned by the ByteCode and - * must not be freed or modified by it. */ - Proc *procPtr; /* If the ByteCode was compiled from a - * procedure body, this is a pointer to its - * Proc structure; otherwise NULL. This - * pointer is also not owned by the ByteCode - * and must not be freed by it. */ - size_t structureSize; /* Number of bytes in the ByteCode structure - * itself. Does not include heap space for - * literal Tcl objects or storage referenced - * by AuxData entries. */ - int numCommands; /* Number of commands compiled. */ - int numSrcBytes; /* Number of source bytes compiled. */ - int numCodeBytes; /* Number of code bytes. */ - int numLitObjects; /* Number of objects in literal array. */ - int numExceptRanges; /* Number of ExceptionRange array elems. */ - int numAuxDataItems; /* Number of AuxData items. */ - int numCmdLocBytes; /* Number of bytes needed for encoded - * command location information. */ - int maxExceptDepth; /* Maximum nesting level of ExceptionRanges; - * -1 if no ranges were compiled. */ - int maxStackDepth; /* Maximum number of stack elements needed - * to execute the code. */ - unsigned char *codeStart; /* Points to the first byte of the code. - * This is just after the final ByteCode - * member cmdMapPtr. */ - Tcl_Obj **objArrayPtr; /* Points to the start of the literal - * object array. This is just after the - * last code byte. */ - ExceptionRange *exceptArrayPtr; - /* Points to the start of the ExceptionRange - * array. This is just after the last - * object in the object array. */ - AuxData *auxDataArrayPtr; /* Points to the start of the auxiliary data - * array. This is just after the last entry - * in the ExceptionRange array. */ - unsigned char *codeDeltaStart; - /* Points to the first of a sequence of - * bytes that encode the change in the - * starting offset of each command's code. - * If -127<=delta<=127, it is encoded as 1 - * byte, otherwise 0xFF (128) appears and - * the delta is encoded by the next 4 bytes. - * Code deltas are always positive. This - * sequence is just after the last entry in - * the AuxData array. */ - unsigned char *codeLengthStart; - /* Points to the first of a sequence of - * bytes that encode the length of each - * command's code. The encoding is the same - * as for code deltas. Code lengths are - * always positive. This sequence is just - * after the last entry in the code delta - * sequence. */ - unsigned char *srcDeltaStart; - /* Points to the first of a sequence of - * bytes that encode the change in the - * starting offset of each command's source. - * The encoding is the same as for code - * deltas. Source deltas can be negative. - * This sequence is just after the last byte - * in the code length sequence. */ - unsigned char *srcLengthStart; - /* Points to the first of a sequence of - * bytes that encode the length of each - * command's source. The encoding is the - * same as for code deltas. Source lengths - * are always positive. This sequence is - * just after the last byte in the source - * delta sequence. */ -#ifdef TCL_COMPILE_STATS - Tcl_Time createTime; /* Absolute time when the ByteCode was - * created. */ -#endif /* TCL_COMPILE_STATS */ -} ByteCode; - -/* - * Opcodes for the Tcl bytecode instructions. These must correspond to the - * entries in the table of instruction descriptions, instructionTable, in - * tclCompile.c. Also, the order and number of the expression opcodes - * (e.g., INST_LOR) must match the entries in the array operatorStrings in - * tclExecute.c. - */ - -/* Opcodes 0 to 9 */ -#define INST_DONE 0 -#define INST_PUSH1 1 -#define INST_PUSH4 2 -#define INST_POP 3 -#define INST_DUP 4 -#define INST_CONCAT1 5 -#define INST_INVOKE_STK1 6 -#define INST_INVOKE_STK4 7 -#define INST_EVAL_STK 8 -#define INST_EXPR_STK 9 - -/* Opcodes 10 to 23 */ -#define INST_LOAD_SCALAR1 10 -#define INST_LOAD_SCALAR4 11 -#define INST_LOAD_SCALAR_STK 12 -#define INST_LOAD_ARRAY1 13 -#define INST_LOAD_ARRAY4 14 -#define INST_LOAD_ARRAY_STK 15 -#define INST_LOAD_STK 16 -#define INST_STORE_SCALAR1 17 -#define INST_STORE_SCALAR4 18 -#define INST_STORE_SCALAR_STK 19 -#define INST_STORE_ARRAY1 20 -#define INST_STORE_ARRAY4 21 -#define INST_STORE_ARRAY_STK 22 -#define INST_STORE_STK 23 - -/* Opcodes 24 to 33 */ -#define INST_INCR_SCALAR1 24 -#define INST_INCR_SCALAR_STK 25 -#define INST_INCR_ARRAY1 26 -#define INST_INCR_ARRAY_STK 27 -#define INST_INCR_STK 28 -#define INST_INCR_SCALAR1_IMM 29 -#define INST_INCR_SCALAR_STK_IMM 30 -#define INST_INCR_ARRAY1_IMM 31 -#define INST_INCR_ARRAY_STK_IMM 32 -#define INST_INCR_STK_IMM 33 - -/* Opcodes 34 to 39 */ -#define INST_JUMP1 34 -#define INST_JUMP4 35 -#define INST_JUMP_TRUE1 36 -#define INST_JUMP_TRUE4 37 -#define INST_JUMP_FALSE1 38 -#define INST_JUMP_FALSE4 39 - -/* Opcodes 40 to 64 */ -#define INST_LOR 40 -#define INST_LAND 41 -#define INST_BITOR 42 -#define INST_BITXOR 43 -#define INST_BITAND 44 -#define INST_EQ 45 -#define INST_NEQ 46 -#define INST_LT 47 -#define INST_GT 48 -#define INST_LE 49 -#define INST_GE 50 -#define INST_LSHIFT 51 -#define INST_RSHIFT 52 -#define INST_ADD 53 -#define INST_SUB 54 -#define INST_MULT 55 -#define INST_DIV 56 -#define INST_MOD 57 -#define INST_UPLUS 58 -#define INST_UMINUS 59 -#define INST_BITNOT 60 -#define INST_LNOT 61 -#define INST_CALL_BUILTIN_FUNC1 62 -#define INST_CALL_FUNC1 63 -#define INST_TRY_CVT_TO_NUMERIC 64 - -/* Opcodes 65 to 66 */ -#define INST_BREAK 65 -#define INST_CONTINUE 66 - -/* Opcodes 67 to 68 */ -#define INST_FOREACH_START4 67 -#define INST_FOREACH_STEP4 68 - -/* Opcodes 69 to 72 */ -#define INST_BEGIN_CATCH4 69 -#define INST_END_CATCH 70 -#define INST_PUSH_RESULT 71 -#define INST_PUSH_RETURN_CODE 72 - -/* The last opcode */ -#define LAST_INST_OPCODE 72 - -/* - * Table describing the Tcl bytecode instructions: their name (for - * displaying code), total number of code bytes required (including - * operand bytes), and a description of the type of each operand. - * These operand types include signed and unsigned integers of length - * one and four bytes. The unsigned integers are used for indexes or - * for, e.g., the count of objects to push in a "push" instruction. - */ - -#define MAX_INSTRUCTION_OPERANDS 2 - -typedef enum InstOperandType { - OPERAND_NONE, - OPERAND_INT1, /* One byte signed integer. */ - OPERAND_INT4, /* Four byte signed integer. */ - OPERAND_UINT1, /* One byte unsigned integer. */ - OPERAND_UINT4 /* Four byte unsigned integer. */ -} InstOperandType; - -typedef struct InstructionDesc { - char *name; /* Name of instruction. */ - int numBytes; /* Total number of bytes for instruction. */ - int numOperands; /* Number of operands. */ - InstOperandType opTypes[MAX_INSTRUCTION_OPERANDS]; - /* The type of each operand. */ -} InstructionDesc; - -extern InstructionDesc instructionTable[]; - -/* - * Definitions of the values of the INST_CALL_BUILTIN_FUNC instruction's - * operand byte. Each value denotes a builtin Tcl math function. These - * values must correspond to the entries in the builtinFuncTable array - * below and to the values stored in the tclInt.h MathFunc structure's - * builtinFuncIndex field. - */ - -#define BUILTIN_FUNC_ACOS 0 -#define BUILTIN_FUNC_ASIN 1 -#define BUILTIN_FUNC_ATAN 2 -#define BUILTIN_FUNC_ATAN2 3 -#define BUILTIN_FUNC_CEIL 4 -#define BUILTIN_FUNC_COS 5 -#define BUILTIN_FUNC_COSH 6 -#define BUILTIN_FUNC_EXP 7 -#define BUILTIN_FUNC_FLOOR 8 -#define BUILTIN_FUNC_FMOD 9 -#define BUILTIN_FUNC_HYPOT 10 -#define BUILTIN_FUNC_LOG 11 -#define BUILTIN_FUNC_LOG10 12 -#define BUILTIN_FUNC_POW 13 -#define BUILTIN_FUNC_SIN 14 -#define BUILTIN_FUNC_SINH 15 -#define BUILTIN_FUNC_SQRT 16 -#define BUILTIN_FUNC_TAN 17 -#define BUILTIN_FUNC_TANH 18 -#define BUILTIN_FUNC_ABS 19 -#define BUILTIN_FUNC_DOUBLE 20 -#define BUILTIN_FUNC_INT 21 -#define BUILTIN_FUNC_RAND 22 -#define BUILTIN_FUNC_ROUND 23 -#define BUILTIN_FUNC_SRAND 24 - -#define LAST_BUILTIN_FUNC 24 - -/* - * Table describing the built-in math functions. Entries in this table are - * indexed by the values of the INST_CALL_BUILTIN_FUNC instruction's - * operand byte. - */ - -typedef int (CallBuiltinFuncProc) _ANSI_ARGS_((Tcl_Interp *interp, - ExecEnv *eePtr, ClientData clientData)); - -typedef struct { - char *name; /* Name of function. */ - int numArgs; /* Number of arguments for function. */ - Tcl_ValueType argTypes[MAX_MATH_ARGS]; - /* Acceptable types for each argument. */ - CallBuiltinFuncProc *proc; /* Procedure implementing this function. */ - ClientData clientData; /* Additional argument to pass to the - * function when invoking it. */ -} BuiltinFunc; - -extern BuiltinFunc builtinFuncTable[]; - -/* - * Compilation of some Tcl constructs such as if commands and the logical or - * (||) and logical and (&&) operators in expressions requires the - * generation of forward jumps. Since the PC target of these jumps isn't - * known when the jumps are emitted, we record the offset of each jump in an - * array of JumpFixup structures. There is one array for each sequence of - * jumps to one target PC. When we learn the target PC, we update the jumps - * with the correct distance. Also, if the distance is too great (> 127 - * bytes), we replace the single-byte jump with a four byte jump - * instruction, move the instructions after the jump down, and update the - * code offsets for any commands between the jump and the target. - */ - -typedef enum { - TCL_UNCONDITIONAL_JUMP, - TCL_TRUE_JUMP, - TCL_FALSE_JUMP -} TclJumpType; - -typedef struct JumpFixup { - TclJumpType jumpType; /* Indicates the kind of jump. */ - int codeOffset; /* Offset of the first byte of the one-byte - * forward jump's code. */ - int cmdIndex; /* Index of the first command after the one - * for which the jump was emitted. Used to - * update the code offsets for subsequent - * commands if the two-byte jump at jumpPc - * must be replaced with a five-byte one. */ - int exceptIndex; /* Index of the first range entry in the - * ExceptionRange array after the current - * one. This field is used to adjust the - * code offsets in subsequent ExceptionRange - * records when a jump is grown from 2 bytes - * to 5 bytes. */ -} JumpFixup; - -#define JUMPFIXUP_INIT_ENTRIES 10 - -typedef struct JumpFixupArray { - JumpFixup *fixup; /* Points to start of jump fixup array. */ - int next; /* Index of next free array entry. */ - int end; /* Index of last usable entry in array. */ - int mallocedArray; /* 1 if array was expanded and fixups points - * into the heap, else 0. */ - JumpFixup staticFixupSpace[JUMPFIXUP_INIT_ENTRIES]; - /* Initial storage for jump fixup array. */ -} JumpFixupArray; - -/* - * The structure describing one variable list of a foreach command. Note - * that only foreach commands inside procedure bodies are compiled inline so - * a ForeachVarList structure always describes local variables. Furthermore, - * only scalar variables are supported for inline-compiled foreach loops. - */ - -typedef struct ForeachVarList { - int numVars; /* The number of variables in the list. */ - int varIndexes[1]; /* An array of the indexes ("slot numbers") - * for each variable in the procedure's - * array of local variables. Only scalar - * variables are supported. The actual - * size of this field will be large enough - * to numVars indexes. THIS MUST BE THE - * LAST FIELD IN THE STRUCTURE! */ -} ForeachVarList; - -/* - * Structure used to hold information about a foreach command that is needed - * during program execution. These structures are stored in CompileEnv and - * ByteCode structures as auxiliary data. - */ - -typedef struct ForeachInfo { - int numLists; /* The number of both the variable and value - * lists of the foreach command. */ - int firstValueTemp; /* Index of the first temp var in a proc - * frame used to point to a value list. */ - int loopCtTemp; /* Index of temp var in a proc frame - * holding the loop's iteration count. Used - * to determine next value list element to - * assign each loop var. */ - ForeachVarList *varLists[1];/* An array of pointers to ForeachVarList - * structures describing each var list. The - * actual size of this field will be large - * enough to numVars indexes. THIS MUST BE - * THE LAST FIELD IN THE STRUCTURE! */ -} ForeachInfo; - -extern AuxDataType tclForeachInfoType; - -/* - * Structure containing a cached pointer to a command that is the result - * of resolving the command's name in some namespace. It is the internal - * representation for a cmdName object. It contains the pointer along - * with some information that is used to check the pointer's validity. - */ - -typedef struct ResolvedCmdName { - Command *cmdPtr; /* A cached Command pointer. */ - Namespace *refNsPtr; /* Points to the namespace containing the - * reference (not the namespace that - * contains the referenced command). */ - long refNsId; /* refNsPtr's unique namespace id. Used to - * verify that refNsPtr is still valid - * (e.g., it's possible that the cmd's - * containing namespace was deleted and a - * new one created at the same address). */ - int refNsCmdEpoch; /* Value of the referencing namespace's - * cmdRefEpoch when the pointer was cached. - * Before using the cached pointer, we check - * if the namespace's epoch was incremented; - * if so, this cached pointer is invalid. */ - int cmdEpoch; /* Value of the command's cmdEpoch when this - * pointer was cached. Before using the - * cached pointer, we check if the cmd's - * epoch was incremented; if so, the cmd was - * renamed, deleted, hidden, or exposed, and - * so the pointer is invalid. */ - int refCount; /* Reference count: 1 for each cmdName - * object that has a pointer to this - * ResolvedCmdName structure as its internal - * rep. This structure can be freed when - * refCount becomes zero. */ -} ResolvedCmdName; - -/* - *---------------------------------------------------------------- - * Procedures shared among Tcl bytecode compilation and execution - * modules but not used outside: - *---------------------------------------------------------------- - */ - -EXTERN void TclCleanupByteCode _ANSI_ARGS_((ByteCode *codePtr)); -EXTERN int TclCompileCmdWord _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Token *tokenPtr, int count, - CompileEnv *envPtr)); -EXTERN int TclCompileExpr _ANSI_ARGS_((Tcl_Interp *interp, - char *script, int numBytes, - CompileEnv *envPtr)); -EXTERN int TclCompileExprWords _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Token *tokenPtr, int numWords, - CompileEnv *envPtr)); -EXTERN int TclCompileScript _ANSI_ARGS_((Tcl_Interp *interp, - char *script, int numBytes, int nested, - CompileEnv *envPtr)); -EXTERN int TclCompileTokens _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Token *tokenPtr, int count, - CompileEnv *envPtr)); -EXTERN int TclCreateAuxData _ANSI_ARGS_((ClientData clientData, - AuxDataType *typePtr, CompileEnv *envPtr)); -EXTERN int TclCreateExceptRange _ANSI_ARGS_(( - ExceptionRangeType type, CompileEnv *envPtr)); -EXTERN ExecEnv * TclCreateExecEnv _ANSI_ARGS_((Tcl_Interp *interp)); -EXTERN void TclDeleteExecEnv _ANSI_ARGS_((ExecEnv *eePtr)); -EXTERN void TclDeleteLiteralTable _ANSI_ARGS_(( - Tcl_Interp *interp, LiteralTable *tablePtr)); -EXTERN void TclEmitForwardJump _ANSI_ARGS_((CompileEnv *envPtr, - TclJumpType jumpType, JumpFixup *jumpFixupPtr)); -EXTERN AuxDataType *TclGetAuxDataType _ANSI_ARGS_((char *typeName)); -EXTERN ExceptionRange * TclGetExceptionRangeForPc _ANSI_ARGS_(( - unsigned char *pc, int catchOnly, - ByteCode* codePtr)); -EXTERN InstructionDesc * TclGetInstructionTable _ANSI_ARGS_(()); -EXTERN int TclExecuteByteCode _ANSI_ARGS_((Tcl_Interp *interp, - ByteCode *codePtr)); -EXTERN void TclExpandCodeArray _ANSI_ARGS_(( - CompileEnv *envPtr)); -EXTERN void TclExpandJumpFixupArray _ANSI_ARGS_(( - JumpFixupArray *fixupArrayPtr)); -EXTERN void TclFinalizeAuxDataTypeTable _ANSI_ARGS_((void)); -EXTERN int TclFindCompiledLocal _ANSI_ARGS_((char *name, - int nameChars, int create, int flags, - Proc *procPtr)); -EXTERN LiteralEntry * TclLookupLiteralEntry _ANSI_ARGS_(( - Tcl_Interp *interp, Tcl_Obj *objPtr)); -EXTERN int TclFixupForwardJump _ANSI_ARGS_(( - CompileEnv *envPtr, JumpFixup *jumpFixupPtr, - int jumpDist, int distThreshold)); -EXTERN void TclFreeCompileEnv _ANSI_ARGS_((CompileEnv *envPtr)); -EXTERN void TclFreeJumpFixupArray _ANSI_ARGS_(( - JumpFixupArray *fixupArrayPtr)); -EXTERN void TclInitAuxDataTypeTable _ANSI_ARGS_((void)); -EXTERN void TclInitByteCodeObj _ANSI_ARGS_((Tcl_Obj *objPtr, - CompileEnv *envPtr)); -EXTERN void TclInitCompilation _ANSI_ARGS_((void)); -EXTERN void TclInitCompileEnv _ANSI_ARGS_((Tcl_Interp *interp, - CompileEnv *envPtr, char *string, - int numBytes)); -EXTERN void TclInitJumpFixupArray _ANSI_ARGS_(( - JumpFixupArray *fixupArrayPtr)); -EXTERN void TclInitLiteralTable _ANSI_ARGS_(( - LiteralTable *tablePtr)); -#ifdef TCL_COMPILE_STATS -EXTERN char * TclLiteralStats _ANSI_ARGS_(( - LiteralTable *tablePtr)); -EXTERN int TclLog2 _ANSI_ARGS_((int value)); -#endif -#ifdef TCL_COMPILE_DEBUG -EXTERN void TclPrintByteCodeObj _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Obj *objPtr)); -#endif -EXTERN int TclPrintInstruction _ANSI_ARGS_((ByteCode* codePtr, - unsigned char *pc)); -EXTERN void TclPrintObject _ANSI_ARGS_((FILE *outFile, - Tcl_Obj *objPtr, int maxChars)); -EXTERN void TclPrintSource _ANSI_ARGS_((FILE *outFile, - char *string, int maxChars)); -EXTERN void TclRegisterAuxDataType _ANSI_ARGS_((AuxDataType *typePtr)); -EXTERN int TclRegisterLiteral _ANSI_ARGS_((CompileEnv *envPtr, - char *bytes, int length, int onHeap)); -EXTERN void TclReleaseLiteral _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Obj *objPtr)); -EXTERN void TclSetCmdNameObj _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Obj *objPtr, Command *cmdPtr)); -#ifdef TCL_COMPILE_DEBUG -EXTERN void TclVerifyGlobalLiteralTable _ANSI_ARGS_(( - Interp *iPtr)); -EXTERN void TclVerifyLocalLiteralTable _ANSI_ARGS_(( - CompileEnv *envPtr)); -#endif - -/* - *---------------------------------------------------------------- - * Macros used by Tcl bytecode compilation and execution modules - * inside the Tcl core but not used outside. - *---------------------------------------------------------------- - */ - -/* - * Macro to emit an opcode byte into a CompileEnv's code array. - * The ANSI C "prototype" for this macro is: - * - * EXTERN void TclEmitOpcode _ANSI_ARGS_((unsigned char op, - * CompileEnv *envPtr)); - */ - -#define TclEmitOpcode(op, envPtr) \ - if ((envPtr)->codeNext == (envPtr)->codeEnd) \ - TclExpandCodeArray(envPtr); \ - *(envPtr)->codeNext++ = (unsigned char) (op) - -/* - * Macro to emit an integer operand. - * The ANSI C "prototype" for this macro is: - * - * EXTERN void TclEmitInt1 _ANSI_ARGS_((int i, CompileEnv *envPtr)); - */ - -#define TclEmitInt1(i, envPtr) \ - if ((envPtr)->codeNext == (envPtr)->codeEnd) \ - TclExpandCodeArray(envPtr); \ - *(envPtr)->codeNext++ = (unsigned char) ((unsigned int) (i)) - -/* - * Macros to emit an instruction with signed or unsigned integer operands. - * Four byte integers are stored in "big-endian" order with the high order - * byte stored at the lowest address. - * The ANSI C "prototypes" for these macros are: - * - * EXTERN void TclEmitInstInt1 _ANSI_ARGS_((unsigned char op, int i, - * CompileEnv *envPtr)); - * EXTERN void TclEmitInstInt4 _ANSI_ARGS_((unsigned char op, int i, - * CompileEnv *envPtr)); - */ - -#define TclEmitInstInt1(op, i, envPtr) \ - if (((envPtr)->codeNext + 2) > (envPtr)->codeEnd) { \ - TclExpandCodeArray(envPtr); \ - } \ - *(envPtr)->codeNext++ = (unsigned char) (op); \ - *(envPtr)->codeNext++ = (unsigned char) ((unsigned int) (i)) - -#define TclEmitInstInt4(op, i, envPtr) \ - if (((envPtr)->codeNext + 5) > (envPtr)->codeEnd) { \ - TclExpandCodeArray(envPtr); \ - } \ - *(envPtr)->codeNext++ = (unsigned char) (op); \ - *(envPtr)->codeNext++ = \ - (unsigned char) ((unsigned int) (i) >> 24); \ - *(envPtr)->codeNext++ = \ - (unsigned char) ((unsigned int) (i) >> 16); \ - *(envPtr)->codeNext++ = \ - (unsigned char) ((unsigned int) (i) >> 8); \ - *(envPtr)->codeNext++ = \ - (unsigned char) ((unsigned int) (i) ) - -/* - * Macro to push a Tcl object onto the Tcl evaluation stack. It emits the - * object's one or four byte array index into the CompileEnv's code - * array. These support, respectively, a maximum of 256 (2**8) and 2**32 - * objects in a CompileEnv. The ANSI C "prototype" for this macro is: - * - * EXTERN void TclEmitPush _ANSI_ARGS_((int objIndex, CompileEnv *envPtr)); - */ - -#define TclEmitPush(objIndex, envPtr) \ - if ((objIndex) <= 255) { \ - TclEmitInstInt1(INST_PUSH1, (objIndex), (envPtr)); \ - } else { \ - TclEmitInstInt4(INST_PUSH4, (objIndex), (envPtr)); \ - } - -/* - * Macros to update a (signed or unsigned) integer starting at a pointer. - * The two variants depend on the number of bytes. The ANSI C "prototypes" - * for these macros are: - * - * EXTERN void TclStoreInt1AtPtr _ANSI_ARGS_((int i, unsigned char *p)); - * EXTERN void TclStoreInt4AtPtr _ANSI_ARGS_((int i, unsigned char *p)); - */ - -#define TclStoreInt1AtPtr(i, p) \ - *(p) = (unsigned char) ((unsigned int) (i)) - -#define TclStoreInt4AtPtr(i, p) \ - *(p) = (unsigned char) ((unsigned int) (i) >> 24); \ - *(p+1) = (unsigned char) ((unsigned int) (i) >> 16); \ - *(p+2) = (unsigned char) ((unsigned int) (i) >> 8); \ - *(p+3) = (unsigned char) ((unsigned int) (i) ) - -/* - * Macros to update instructions at a particular pc with a new op code - * and a (signed or unsigned) int operand. The ANSI C "prototypes" for - * these macros are: - * - * EXTERN void TclUpdateInstInt1AtPc _ANSI_ARGS_((unsigned char op, int i, - * unsigned char *pc)); - * EXTERN void TclUpdateInstInt4AtPc _ANSI_ARGS_((unsigned char op, int i, - * unsigned char *pc)); - */ - -#define TclUpdateInstInt1AtPc(op, i, pc) \ - *(pc) = (unsigned char) (op); \ - TclStoreInt1AtPtr((i), ((pc)+1)) - -#define TclUpdateInstInt4AtPc(op, i, pc) \ - *(pc) = (unsigned char) (op); \ - TclStoreInt4AtPtr((i), ((pc)+1)) - -/* - * Macros to get a signed integer (GET_INT{1,2}) or an unsigned int - * (GET_UINT{1,2}) from a pointer. There are two variants for each - * return type that depend on the number of bytes fetched. - * The ANSI C "prototypes" for these macros are: - * - * EXTERN int TclGetInt1AtPtr _ANSI_ARGS_((unsigned char *p)); - * EXTERN int TclGetInt4AtPtr _ANSI_ARGS_((unsigned char *p)); - * EXTERN unsigned int TclGetUInt1AtPtr _ANSI_ARGS_((unsigned char *p)); - * EXTERN unsigned int TclGetUInt4AtPtr _ANSI_ARGS_((unsigned char *p)); - */ - -/* - * The TclGetInt1AtPtr macro is tricky because we want to do sign - * extension on the 1-byte value. Unfortunately the "char" type isn't - * signed on all platforms so sign-extension doesn't always happen - * automatically. Sometimes we can explicitly declare the pointer to be - * signed, but other times we have to explicitly sign-extend the value - * in software. - */ - -#ifndef __CHAR_UNSIGNED__ -# define TclGetInt1AtPtr(p) ((int) *((char *) p)) -#else -# ifdef HAVE_SIGNED_CHAR -# define TclGetInt1AtPtr(p) ((int) *((signed char *) p)) -# else -# define TclGetInt1AtPtr(p) (((int) *((char *) p)) \ - | ((*(p) & 0200) ? (-256) : 0)) -# endif -#endif - -#define TclGetInt4AtPtr(p) (((int) TclGetInt1AtPtr(p) << 24) | \ - (*((p)+1) << 16) | \ - (*((p)+2) << 8) | \ - (*((p)+3))) - -#define TclGetUInt1AtPtr(p) ((unsigned int) *(p)) -#define TclGetUInt4AtPtr(p) ((unsigned int) (*(p) << 24) | \ - (*((p)+1) << 16) | \ - (*((p)+2) << 8) | \ - (*((p)+3))) - -/* - * Macros used to compute the minimum and maximum of two integers. - * The ANSI C "prototypes" for these macros are: - * - * EXTERN int TclMin _ANSI_ARGS_((int i, int j)); - * EXTERN int TclMax _ANSI_ARGS_((int i, int j)); - */ - -#define TclMin(i, j) ((((int) i) < ((int) j))? (i) : (j)) -#define TclMax(i, j) ((((int) i) > ((int) j))? (i) : (j)) - -# undef TCL_STORAGE_CLASS -# define TCL_STORAGE_CLASS DLLIMPORT - -#endif /* _TCLCOMPILATION */ |