source/interpret.h

   1 /* $Id: interpret.h,v 1.16 2004/07/21 11:32:05 yooden Exp $ */
   2 /*******************************************************************************
   3 *                                                                              *
   4 * interpret.h -- Nirvana Editor Interpreter Header File                        *
   5 *                                                                              *
   6 * Copyright 2004 The NEdit Developers                                          *
   7 *                                                                              *
   8 * This is free software; you can redistribute it and/or modify it under the    *
   9 * terms of the GNU General Public License as published by the Free Software    *
  10 * Foundation; either version 2 of the License, or (at your option) any later   *
  11 * version. In addition, you may distribute version of this program linked to   *
  12 * Motif or Open Motif. See README for details.                                 *
  13 *                                                                              *
  14 * This software is distributed in the hope that it will be useful, but WITHOUT *
  15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or        *
  16 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License *
  17 * for more details.                                                            *
  18 *                                                                              *
  19 * You should have received a copy of the GNU General Public License along with *
  20 * software; if not, write to the Free Software Foundation, Inc., 59 Temple     *
  21 * Place, Suite 330, Boston, MA  02111-1307 USA                                 *
  22 *                                                                              *
  23 * Nirvana Text Editor                                                          *
  24 * July 31, 2001                                                                *
  25 *                                                                              *
  26 *******************************************************************************/
  27
  28 #ifndef NEDIT_INTERPRET_H_INCLUDED
  29 #define NEDIT_INTERPRET_H_INCLUDED
  30
  31 #include "nedit.h"
  32 #include "rbTree.h"
  33
  34 #define MAX_ARGS 9              /* Maximum number of subroutine arguments */
  35 #define STACK_SIZE 1024         /* Maximum stack size */
  36 #define MAX_SYM_LEN 100         /* Max. symbol name length */
  37 #define MACRO_EVENT_MARKER 2    /* Special value for the send_event field of
  38                                    events passed to action routines.  Tells
  39                                    them that they were called from a macro */
  40
  41 enum symTypes {CONST_SYM, GLOBAL_SYM, LOCAL_SYM, ARG_SYM, PROC_VALUE_SYM,
  42         C_FUNCTION_SYM, MACRO_FUNCTION_SYM, ACTION_ROUTINE_SYM};
  43 #define N_OPS 43
  44 enum operations {OP_RETURN_NO_VAL, OP_RETURN, OP_PUSH_SYM, OP_DUP, OP_ADD,
  45     OP_SUB, OP_MUL, OP_DIV, OP_MOD, OP_NEGATE, OP_INCR, OP_DECR, OP_GT, OP_LT,
  46     OP_GE, OP_LE, OP_EQ, OP_NE, OP_BIT_AND, OP_BIT_OR, OP_AND, OP_OR, OP_NOT,
  47     OP_POWER, OP_CONCAT, OP_ASSIGN, OP_SUBR_CALL, OP_FETCH_RET_VAL, OP_BRANCH,
  48     OP_BRANCH_TRUE, OP_BRANCH_FALSE, OP_BRANCH_NEVER, OP_ARRAY_REF,
  49     OP_ARRAY_ASSIGN, OP_BEGIN_ARRAY_ITER, OP_ARRAY_ITER, OP_IN_ARRAY,
  50     OP_ARRAY_DELETE, OP_PUSH_ARRAY_SYM, OP_ARRAY_REF_ASSIGN_SETUP, OP_PUSH_ARG,
  51     OP_PUSH_ARG_COUNT, OP_PUSH_ARG_ARRAY};
  52
  53 enum typeTags {NO_TAG, INT_TAG, STRING_TAG, ARRAY_TAG};
  54
  55 enum execReturnCodes {MACRO_TIME_LIMIT, MACRO_PREEMPT, MACRO_DONE, MACRO_ERROR};
  56
  57 #define ARRAY_DIM_SEP "\034"
  58
  59 struct DataValueTag;
  60 struct ProgramTag;
  61
  62 typedef int (*Inst)(void);
  63
  64 typedef int (*BuiltInSubr)(WindowInfo *window, struct DataValueTag *argList,
  65         int nArgs, struct DataValueTag *result, char **errMsg);
  66
  67 typedef struct NStringTag {
  68   char *rep;
  69   size_t len;
  70 } NString;
  71
  72 typedef struct DataValueTag {
  73     enum typeTags tag;
  74     union {
  75         int n;
  76         struct NStringTag str;
  77         BuiltInSubr subr;
  78         struct ProgramTag* prog;
  79         XtActionProc xtproc;
  80         Inst* inst;
  81         struct DataValueTag* dataval;
  82         struct SparseArrayEntry *arrayPtr;
  83     } val;
  84 } DataValue;
  85
  86 typedef struct {
  87     rbTreeNode nodePtrs; /* MUST BE FIRST ENTRY */
  88     char *key;
  89     DataValue value;
  90 } SparseArrayEntry;
  91
  92 /* symbol table entry */
  93 typedef struct SymbolRec {
  94     char *name;
  95     enum symTypes type;
  96     DataValue value;
  97     struct SymbolRec *next;     /* to link to another */
  98 } Symbol;
  99
 100 typedef struct ProgramTag {
 101     Symbol *localSymList;
 102     Inst *code;
 103 } Program;
 104
 105 /* Information needed to re-start a preempted macro */
 106 typedef struct {
 107     DataValue *stack;
 108     DataValue *stackP;
 109     DataValue *frameP;
 110     Inst *pc;
 111     WindowInfo *runWindow;
 112     WindowInfo *focusWindow;
 113 } RestartData;
 114
 115 void InitMacroGlobals(void);
 116
 117 SparseArrayEntry *arrayIterateFirst(DataValue *theArray);
 118 SparseArrayEntry *arrayIterateNext(SparseArrayEntry *iterator);
 119 struct SparseArrayEntry *ArrayNew(void);
 120 int ArrayInsert(DataValue *theArray, char *keyStr, DataValue *theValue);
 121 void ArrayDelete(DataValue *theArray, char *keyStr);
 122 void ArrayDeleteAll(DataValue *theArray);
 123 int ArraySize(DataValue *theArray);
 124 int ArrayGet(DataValue *theArray, char *keyStr, DataValue *theValue);
 125 int ArrayCopy(DataValue *dstArray, DataValue *srcArray);
 126
 127 /* Routines for creating a program, (accumulated beginning with
 128    BeginCreatingProgram and returned via FinishCreatingProgram) */
 129 void BeginCreatingProgram(void);
 130 int AddOp(int op, char **msg);
 131 int AddSym(Symbol *sym, char **msg);
 132 int AddImmediate(void *value, char **msg);
 133 int AddBranchOffset(Inst *to, char **msg);
 134 Inst *GetPC(void);
 135 Symbol *InstallIteratorSymbol();
 136 Symbol *LookupStringConstSymbol(const char *value);
 137 Symbol *InstallStringConstSymbol(const char *str);
 138 Symbol *LookupSymbol(const char *name);
 139 Symbol *InstallSymbol(const char *name, enum symTypes type, DataValue value);
 140 Program *FinishCreatingProgram(void);
 141 void SwapCode(Inst *start, Inst *boundary, Inst *end);
 142 void StartLoopAddrList(void);
 143 int AddBreakAddr(Inst *addr);
 144 int AddContinueAddr(Inst *addr);
 145 void FillLoopAddrs(Inst *breakAddr, Inst *continueAddr);
 146
 147 /* create a permanently allocated static string (only for use with static strings) */
 148 #define PERM_ALLOC_STR(xStr) (((char *)("\001" xStr)) + 1)
 149
 150 /* Routines for executing programs */
 151 int ExecuteMacro(WindowInfo *window, Program *prog, int nArgs, DataValue *args,
 152         DataValue *result, RestartData **continuation, char **msg);
 153 int ContinueMacro(RestartData *continuation, DataValue *result, char **msg);
 154 void RunMacroAsSubrCall(Program *prog);
 155 void PreemptMacro(void);
 156 char *AllocString(int length);
 157 char *AllocStringNCpy(const char *s, int length);
 158 char *AllocStringCpy(const char *s);
 159 int AllocNString(NString *string, int length);
 160 int AllocNStringNCpy(NString *string, const char *s, int length);
 161 int AllocNStringCpy(NString *string, const char *s);
 162 void GarbageCollectStrings(void);
 163 void FreeRestartData(RestartData *context);
 164 Symbol *PromoteToGlobal(Symbol *sym);
 165 void FreeProgram(Program *prog);
 166 void ModifyReturnedValue(RestartData *context, DataValue dv);
 167 WindowInfo *MacroRunWindow(void);
 168 WindowInfo *MacroFocusWindow(void);
 169 void SetMacroFocusWindow(WindowInfo *window);
 170 /* function used for implicit conversion from string to number */
 171 int StringToNum(const char *string, int *number);
 172
 173 #endif /* NEDIT_INTERPRET_H_INCLUDED */