1 /* @(#) pfcompil.c 98/01/26 1.5 */
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2 /***************************************************************
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3 ** Compiler for PForth based on 'C'
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5 ** These routines could be left out of an execute only version.
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8 ** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom
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10 ** The pForth software code is dedicated to the public domain,
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11 ** and any third party may reproduce, distribute and modify
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12 ** the pForth software code or any derivative works thereof
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13 ** without any compensation or license. The pForth software
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14 ** code is provided on an "as is" basis without any warranty
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15 ** of any kind, including, without limitation, the implied
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16 ** warranties of merchantability and fitness for a particular
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17 ** purpose and their equivalents under the laws of any jurisdiction.
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19 ****************************************************************
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20 ** 941004 PLB Extracted IO calls from pforth_main.c
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21 ** 950320 RDG Added underflow checking for FP stack
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22 ***************************************************************/
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25 #include "pfcompil.h"
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27 #define ABORT_RETURN_CODE (10)
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28 #define UINT32_MASK ((sizeof(ucell_t)-1))
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30 /***************************************************************/
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31 /************** Static Prototypes ******************************/
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32 /***************************************************************/
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34 static void ffStringColon( const ForthStringPtr FName );
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35 static cell_t CheckRedefinition( const ForthStringPtr FName );
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36 static void ffUnSmudge( void );
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37 static cell_t FindAndCompile( const char *theWord );
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38 static cell_t ffCheckDicRoom( void );
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41 static void CreateDeferredC( ExecToken DefaultXT, const char *CName );
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44 cell_t NotCompiled( const char *FunctionName )
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48 MSG(" not compiled in this version of PForth.\n");
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53 /***************************************************************
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54 ** Create an entry in the Dictionary for the given ExecutionToken.
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55 ** FName is name in Forth format.
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57 void CreateDicEntry( ExecToken XT, const ForthStringPtr FName, ucell_t Flags )
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61 cfnl = (cfNameLinks *) gCurrentDictionary->dic_HeaderPtr;
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63 /* Set link to previous header, if any. */
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66 WRITE_CELL_DIC( &cfnl->cfnl_PreviousName, ABS_TO_NAMEREL( gVarContext ) );
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70 cfnl->cfnl_PreviousName = 0;
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73 /* Put Execution token in header. */
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74 WRITE_CELL_DIC( &cfnl->cfnl_ExecToken, XT );
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76 /* Advance Header Dictionary Pointer */
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77 gCurrentDictionary->dic_HeaderPtr += sizeof(cfNameLinks);
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80 gVarContext = gCurrentDictionary->dic_HeaderPtr;
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81 pfCopyMemory( (uint8_t *) gCurrentDictionary->dic_HeaderPtr, FName, (*FName)+1 );
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82 gCurrentDictionary->dic_HeaderPtr += (*FName)+1;
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85 *(char*)gVarContext |= (char) Flags;
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87 /* Align to quad byte boundaries with zeroes. */
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88 while( gCurrentDictionary->dic_HeaderPtr & UINT32_MASK )
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90 *(char*)(gCurrentDictionary->dic_HeaderPtr++) = 0;
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94 /***************************************************************
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95 ** Convert name then create dictionary entry.
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97 void CreateDicEntryC( ExecToken XT, const char *CName, ucell_t Flags )
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99 ForthString FName[40];
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100 CStringToForth( FName, CName );
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101 CreateDicEntry( XT, FName, Flags );
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104 /***************************************************************
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105 ** Convert absolute namefield address to previous absolute name
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106 ** field address or NULL.
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108 const ForthString *NameToPrevious( const ForthString *NFA )
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111 const cfNameLinks *cfnl;
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113 /* DBUG(("\nNameToPrevious: NFA = 0x%x\n", (cell_t) NFA)); */
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114 cfnl = (const cfNameLinks *) ( ((const char *) NFA) - sizeof(cfNameLinks) );
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116 RelNamePtr = READ_CELL_DIC((const cell_t *) (&cfnl->cfnl_PreviousName));
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117 /* DBUG(("\nNameToPrevious: RelNamePtr = 0x%x\n", (cell_t) RelNamePtr )); */
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120 return ( (ForthString *) NAMEREL_TO_ABS( RelNamePtr ) );
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127 /***************************************************************
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128 ** Convert NFA to ExecToken.
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130 ExecToken NameToToken( const ForthString *NFA )
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132 const cfNameLinks *cfnl;
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134 /* Convert absolute namefield address to absolute link field address. */
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135 cfnl = (const cfNameLinks *) ( ((const char *) NFA) - sizeof(cfNameLinks) );
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137 return READ_CELL_DIC((const cell_t *) (&cfnl->cfnl_ExecToken));
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140 /***************************************************************
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141 ** Find XTs needed by compiler.
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143 cell_t FindSpecialXTs( void )
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145 if( ffFindC( "(QUIT)", &gQuitP_XT ) == 0) goto nofind;
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146 if( ffFindC( "NUMBER?", &gNumberQ_XT ) == 0) goto nofind;
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147 if( ffFindC( "ACCEPT", &gAcceptP_XT ) == 0) goto nofind;
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148 DBUG(("gNumberQ_XT = 0x%x\n", (unsigned int)gNumberQ_XT ));
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152 ERR("FindSpecialXTs failed!\n");
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156 /***************************************************************
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157 ** Build a dictionary from scratch.
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160 PForthDictionary pfBuildDictionary( cell_t HeaderSize, cell_t CodeSize )
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162 pfDictionary_t *dic;
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164 dic = pfCreateDictionary( HeaderSize, CodeSize );
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165 if( !dic ) goto nomem;
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167 pfDebugMessage("pfBuildDictionary: Start adding dictionary entries.\n");
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169 gCurrentDictionary = dic;
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170 gNumPrimitives = NUM_PRIMITIVES;
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172 CreateDicEntryC( ID_EXIT, "EXIT", 0 );
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173 pfDebugMessage("pfBuildDictionary: added EXIT\n");
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174 CreateDicEntryC( ID_1MINUS, "1-", 0 );
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175 pfDebugMessage("pfBuildDictionary: added 1-\n");
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176 CreateDicEntryC( ID_1PLUS, "1+", 0 );
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177 CreateDicEntryC( ID_2_R_FETCH, "2R@", 0 );
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178 CreateDicEntryC( ID_2_R_FROM, "2R>", 0 );
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179 CreateDicEntryC( ID_2_TO_R, "2>R", 0 );
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180 CreateDicEntryC( ID_2DUP, "2DUP", 0 );
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181 CreateDicEntryC( ID_2LITERAL, "2LITERAL", FLAG_IMMEDIATE );
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182 CreateDicEntryC( ID_2LITERAL_P, "(2LITERAL)", 0 );
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183 CreateDicEntryC( ID_2MINUS, "2-", 0 );
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184 CreateDicEntryC( ID_2PLUS, "2+", 0 );
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185 CreateDicEntryC( ID_2OVER, "2OVER", 0 );
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186 CreateDicEntryC( ID_2SWAP, "2SWAP", 0 );
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187 CreateDicEntryC( ID_ACCEPT_P, "(ACCEPT)", 0 );
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188 CreateDeferredC( ID_ACCEPT_P, "ACCEPT" );
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189 CreateDicEntryC( ID_ALITERAL, "ALITERAL", FLAG_IMMEDIATE );
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190 CreateDicEntryC( ID_ALITERAL_P, "(ALITERAL)", 0 );
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191 CreateDicEntryC( ID_ALLOCATE, "ALLOCATE", 0 );
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192 pfDebugMessage("pfBuildDictionary: added ALLOCATE\n");
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193 CreateDicEntryC( ID_ARSHIFT, "ARSHIFT", 0 );
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194 CreateDicEntryC( ID_AND, "AND", 0 );
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195 CreateDicEntryC( ID_BAIL, "BAIL", 0 );
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196 CreateDicEntryC( ID_BRANCH, "BRANCH", 0 );
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197 CreateDicEntryC( ID_BODY_OFFSET, "BODY_OFFSET", 0 );
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198 CreateDicEntryC( ID_BYE, "BYE", 0 );
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199 CreateDicEntryC( ID_CATCH, "CATCH", 0 );
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200 CreateDicEntryC( ID_CELL, "CELL", 0 );
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201 CreateDicEntryC( ID_CELLS, "CELLS", 0 );
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202 CreateDicEntryC( ID_CFETCH, "C@", 0 );
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203 CreateDicEntryC( ID_CMOVE, "CMOVE", 0 );
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204 CreateDicEntryC( ID_CMOVE_UP, "CMOVE>", 0 );
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205 CreateDicEntryC( ID_COLON, ":", 0 );
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206 CreateDicEntryC( ID_COLON_P, "(:)", 0 );
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207 CreateDicEntryC( ID_COMPARE, "COMPARE", 0 );
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208 CreateDicEntryC( ID_COMP_EQUAL, "=", 0 );
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209 CreateDicEntryC( ID_COMP_NOT_EQUAL, "<>", 0 );
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210 CreateDicEntryC( ID_COMP_GREATERTHAN, ">", 0 );
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211 CreateDicEntryC( ID_COMP_U_GREATERTHAN, "U>", 0 );
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212 pfDebugMessage("pfBuildDictionary: added U>\n");
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213 CreateDicEntryC( ID_COMP_LESSTHAN, "<", 0 );
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214 CreateDicEntryC( ID_COMP_U_LESSTHAN, "U<", 0 );
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215 CreateDicEntryC( ID_COMP_ZERO_EQUAL, "0=", 0 );
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216 CreateDicEntryC( ID_COMP_ZERO_NOT_EQUAL, "0<>", 0 );
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217 CreateDicEntryC( ID_COMP_ZERO_GREATERTHAN, "0>", 0 );
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218 CreateDicEntryC( ID_COMP_ZERO_LESSTHAN, "0<", 0 );
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219 CreateDicEntryC( ID_CR, "CR", 0 );
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220 CreateDicEntryC( ID_CREATE, "CREATE", 0 );
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221 CreateDicEntryC( ID_CREATE_P, "(CREATE)", 0 );
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222 CreateDicEntryC( ID_D_PLUS, "D+", 0 );
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223 CreateDicEntryC( ID_D_MINUS, "D-", 0 );
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224 CreateDicEntryC( ID_D_UMSMOD, "UM/MOD", 0 );
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225 CreateDicEntryC( ID_D_MUSMOD, "MU/MOD", 0 );
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226 CreateDicEntryC( ID_D_MTIMES, "M*", 0 );
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227 pfDebugMessage("pfBuildDictionary: added M*\n");
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228 CreateDicEntryC( ID_D_UMTIMES, "UM*", 0 );
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229 CreateDicEntryC( ID_DEFER, "DEFER", 0 );
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230 CreateDicEntryC( ID_CSTORE, "C!", 0 );
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231 CreateDicEntryC( ID_DEPTH, "DEPTH", 0 );
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232 pfDebugMessage("pfBuildDictionary: added DEPTH\n");
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233 CreateDicEntryC( ID_DIVIDE, "/", 0 );
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234 CreateDicEntryC( ID_DOT, ".", 0 );
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235 CreateDicEntryC( ID_DOTS, ".S", 0 );
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236 pfDebugMessage("pfBuildDictionary: added .S\n");
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237 CreateDicEntryC( ID_DO_P, "(DO)", 0 );
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238 CreateDicEntryC( ID_DROP, "DROP", 0 );
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239 CreateDicEntryC( ID_DUMP, "DUMP", 0 );
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240 CreateDicEntryC( ID_DUP, "DUP", 0 );
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241 CreateDicEntryC( ID_EMIT_P, "(EMIT)", 0 );
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242 pfDebugMessage("pfBuildDictionary: added (EMIT)\n");
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243 CreateDeferredC( ID_EMIT_P, "EMIT");
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244 pfDebugMessage("pfBuildDictionary: added EMIT\n");
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245 CreateDicEntryC( ID_EOL, "EOL", 0 );
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246 CreateDicEntryC( ID_ERRORQ_P, "(?ERROR)", 0 );
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247 CreateDicEntryC( ID_ERRORQ_P, "?ERROR", 0 );
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248 CreateDicEntryC( ID_EXECUTE, "EXECUTE", 0 );
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249 CreateDicEntryC( ID_FETCH, "@", 0 );
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250 CreateDicEntryC( ID_FILL, "FILL", 0 );
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251 CreateDicEntryC( ID_FIND, "FIND", 0 );
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252 CreateDicEntryC( ID_FILE_CREATE, "CREATE-FILE", 0 );
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253 CreateDicEntryC( ID_FILE_DELETE, "DELETE-FILE", 0 );
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254 CreateDicEntryC( ID_FILE_OPEN, "OPEN-FILE", 0 );
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255 CreateDicEntryC( ID_FILE_CLOSE, "CLOSE-FILE", 0 );
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256 CreateDicEntryC( ID_FILE_READ, "READ-FILE", 0 );
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257 CreateDicEntryC( ID_FILE_SIZE, "FILE-SIZE", 0 );
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258 CreateDicEntryC( ID_FILE_WRITE, "WRITE-FILE", 0 );
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259 CreateDicEntryC( ID_FILE_POSITION, "FILE-POSITION", 0 );
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260 CreateDicEntryC( ID_FILE_REPOSITION, "REPOSITION-FILE", 0 );
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261 CreateDicEntryC( ID_FILE_RO, "R/O", 0 );
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262 CreateDicEntryC( ID_FILE_RW, "R/W", 0 );
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263 CreateDicEntryC( ID_FILE_WO, "W/O", 0 );
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264 CreateDicEntryC( ID_FILE_BIN, "BIN", 0 );
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265 CreateDicEntryC( ID_FINDNFA, "FINDNFA", 0 );
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266 CreateDicEntryC( ID_FLUSHEMIT, "FLUSHEMIT", 0 );
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267 CreateDicEntryC( ID_FREE, "FREE", 0 );
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268 #include "pfcompfp.h"
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269 CreateDicEntryC( ID_HERE, "HERE", 0 );
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270 CreateDicEntryC( ID_NUMBERQ_P, "(SNUMBER?)", 0 );
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271 CreateDicEntryC( ID_I, "I", 0 );
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272 CreateDicEntryC( ID_INTERPRET, "INTERPRET", 0 );
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273 CreateDicEntryC( ID_J, "J", 0 );
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274 CreateDicEntryC( ID_INCLUDE_FILE, "INCLUDE-FILE", 0 );
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275 CreateDicEntryC( ID_KEY, "KEY", 0 );
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276 CreateDicEntryC( ID_LEAVE_P, "(LEAVE)", 0 );
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277 CreateDicEntryC( ID_LITERAL, "LITERAL", FLAG_IMMEDIATE );
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278 CreateDicEntryC( ID_LITERAL_P, "(LITERAL)", 0 );
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279 CreateDicEntryC( ID_LOADSYS, "LOADSYS", 0 );
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280 CreateDicEntryC( ID_LOCAL_COMPILER, "LOCAL-COMPILER", 0 );
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281 CreateDicEntryC( ID_LOCAL_ENTRY, "(LOCAL.ENTRY)", 0 );
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282 CreateDicEntryC( ID_LOCAL_EXIT, "(LOCAL.EXIT)", 0 );
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283 CreateDicEntryC( ID_LOCAL_FETCH, "(LOCAL@)", 0 );
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284 CreateDicEntryC( ID_LOCAL_FETCH_1, "(1_LOCAL@)", 0 );
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285 CreateDicEntryC( ID_LOCAL_FETCH_2, "(2_LOCAL@)", 0 );
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286 CreateDicEntryC( ID_LOCAL_FETCH_3, "(3_LOCAL@)", 0 );
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287 CreateDicEntryC( ID_LOCAL_FETCH_4, "(4_LOCAL@)", 0 );
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288 CreateDicEntryC( ID_LOCAL_FETCH_5, "(5_LOCAL@)", 0 );
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289 CreateDicEntryC( ID_LOCAL_FETCH_6, "(6_LOCAL@)", 0 );
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290 CreateDicEntryC( ID_LOCAL_FETCH_7, "(7_LOCAL@)", 0 );
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291 CreateDicEntryC( ID_LOCAL_FETCH_8, "(8_LOCAL@)", 0 );
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292 CreateDicEntryC( ID_LOCAL_STORE, "(LOCAL!)", 0 );
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293 CreateDicEntryC( ID_LOCAL_STORE_1, "(1_LOCAL!)", 0 );
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294 CreateDicEntryC( ID_LOCAL_STORE_2, "(2_LOCAL!)", 0 );
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295 CreateDicEntryC( ID_LOCAL_STORE_3, "(3_LOCAL!)", 0 );
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296 CreateDicEntryC( ID_LOCAL_STORE_4, "(4_LOCAL!)", 0 );
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297 CreateDicEntryC( ID_LOCAL_STORE_5, "(5_LOCAL!)", 0 );
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298 CreateDicEntryC( ID_LOCAL_STORE_6, "(6_LOCAL!)", 0 );
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299 CreateDicEntryC( ID_LOCAL_STORE_7, "(7_LOCAL!)", 0 );
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300 CreateDicEntryC( ID_LOCAL_STORE_8, "(8_LOCAL!)", 0 );
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301 CreateDicEntryC( ID_LOCAL_PLUSSTORE, "(LOCAL+!)", 0 );
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302 CreateDicEntryC( ID_LOOP_P, "(LOOP)", 0 );
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303 CreateDicEntryC( ID_LSHIFT, "LSHIFT", 0 );
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304 CreateDicEntryC( ID_MAX, "MAX", 0 );
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305 CreateDicEntryC( ID_MIN, "MIN", 0 );
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306 CreateDicEntryC( ID_MINUS, "-", 0 );
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307 CreateDicEntryC( ID_NAME_TO_TOKEN, "NAME>", 0 );
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308 CreateDicEntryC( ID_NAME_TO_PREVIOUS, "PREVNAME", 0 );
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309 CreateDicEntryC( ID_NOOP, "NOOP", 0 );
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310 CreateDeferredC( ID_NUMBERQ_P, "NUMBER?" );
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311 CreateDicEntryC( ID_OR, "OR", 0 );
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312 CreateDicEntryC( ID_OVER, "OVER", 0 );
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313 pfDebugMessage("pfBuildDictionary: added OVER\n");
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314 CreateDicEntryC( ID_PICK, "PICK", 0 );
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315 CreateDicEntryC( ID_PLUS, "+", 0 );
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316 CreateDicEntryC( ID_PLUSLOOP_P, "(+LOOP)", 0 );
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317 CreateDicEntryC( ID_PLUS_STORE, "+!", 0 );
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318 CreateDicEntryC( ID_QUIT_P, "(QUIT)", 0 );
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319 CreateDeferredC( ID_QUIT_P, "QUIT" );
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320 CreateDicEntryC( ID_QDO_P, "(?DO)", 0 );
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321 CreateDicEntryC( ID_QDUP, "?DUP", 0 );
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322 CreateDicEntryC( ID_QTERMINAL, "?TERMINAL", 0 );
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323 CreateDicEntryC( ID_QTERMINAL, "KEY?", 0 );
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324 CreateDicEntryC( ID_REFILL, "REFILL", 0 );
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325 CreateDicEntryC( ID_RESIZE, "RESIZE", 0 );
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326 CreateDicEntryC( ID_ROLL, "ROLL", 0 );
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327 CreateDicEntryC( ID_ROT, "ROT", 0 );
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328 CreateDicEntryC( ID_RSHIFT, "RSHIFT", 0 );
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329 CreateDicEntryC( ID_R_DROP, "RDROP", 0 );
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330 CreateDicEntryC( ID_R_FETCH, "R@", 0 );
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331 CreateDicEntryC( ID_R_FROM, "R>", 0 );
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332 CreateDicEntryC( ID_RP_FETCH, "RP@", 0 );
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333 CreateDicEntryC( ID_RP_STORE, "RP!", 0 );
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334 CreateDicEntryC( ID_SEMICOLON, ";", FLAG_IMMEDIATE );
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335 CreateDicEntryC( ID_SP_FETCH, "SP@", 0 );
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336 CreateDicEntryC( ID_SP_STORE, "SP!", 0 );
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337 CreateDicEntryC( ID_STORE, "!", 0 );
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338 CreateDicEntryC( ID_SAVE_FORTH_P, "(SAVE-FORTH)", 0 );
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339 CreateDicEntryC( ID_SCAN, "SCAN", 0 );
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340 CreateDicEntryC( ID_SKIP, "SKIP", 0 );
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341 CreateDicEntryC( ID_SOURCE, "SOURCE", 0 );
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342 CreateDicEntryC( ID_SOURCE_SET, "SET-SOURCE", 0 );
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343 CreateDicEntryC( ID_SOURCE_ID, "SOURCE-ID", 0 );
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344 CreateDicEntryC( ID_SOURCE_ID_PUSH, "PUSH-SOURCE-ID", 0 );
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345 CreateDicEntryC( ID_SOURCE_ID_POP, "POP-SOURCE-ID", 0 );
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346 CreateDicEntryC( ID_SWAP, "SWAP", 0 );
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347 CreateDicEntryC( ID_TEST1, "TEST1", 0 );
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348 CreateDicEntryC( ID_TEST2, "TEST2", 0 );
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349 CreateDicEntryC( ID_TICK, "'", 0 );
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350 CreateDicEntryC( ID_TIMES, "*", 0 );
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351 CreateDicEntryC( ID_THROW, "THROW", 0 );
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352 CreateDicEntryC( ID_TO_R, ">R", 0 );
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353 CreateDicEntryC( ID_TYPE, "TYPE", 0 );
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354 CreateDicEntryC( ID_VAR_BASE, "BASE", 0 );
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355 CreateDicEntryC( ID_VAR_CODE_BASE, "CODE-BASE", 0 );
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356 CreateDicEntryC( ID_VAR_CODE_LIMIT, "CODE-LIMIT", 0 );
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357 CreateDicEntryC( ID_VAR_CONTEXT, "CONTEXT", 0 );
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358 CreateDicEntryC( ID_VAR_DP, "DP", 0 );
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359 CreateDicEntryC( ID_VAR_ECHO, "ECHO", 0 );
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360 CreateDicEntryC( ID_VAR_HEADERS_PTR, "HEADERS-PTR", 0 );
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361 CreateDicEntryC( ID_VAR_HEADERS_BASE, "HEADERS-BASE", 0 );
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362 CreateDicEntryC( ID_VAR_HEADERS_LIMIT, "HEADERS-LIMIT", 0 );
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363 CreateDicEntryC( ID_VAR_NUM_TIB, "#TIB", 0 );
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364 CreateDicEntryC( ID_VAR_RETURN_CODE, "RETURN-CODE", 0 );
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365 CreateDicEntryC( ID_VAR_TRACE_FLAGS, "TRACE-FLAGS", 0 );
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366 CreateDicEntryC( ID_VAR_TRACE_LEVEL, "TRACE-LEVEL", 0 );
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367 CreateDicEntryC( ID_VAR_TRACE_STACK, "TRACE-STACK", 0 );
\r
368 CreateDicEntryC( ID_VAR_OUT, "OUT", 0 );
\r
369 CreateDicEntryC( ID_VAR_STATE, "STATE", 0 );
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370 CreateDicEntryC( ID_VAR_TO_IN, ">IN", 0 );
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371 CreateDicEntryC( ID_WORD, "WORD", 0 );
\r
372 CreateDicEntryC( ID_WORD_FETCH, "W@", 0 );
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373 CreateDicEntryC( ID_WORD_STORE, "W!", 0 );
\r
374 CreateDicEntryC( ID_XOR, "XOR", 0 );
\r
375 CreateDicEntryC( ID_ZERO_BRANCH, "0BRANCH", 0 );
\r
377 pfDebugMessage("pfBuildDictionary: FindSpecialXTs\n");
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378 if( FindSpecialXTs() < 0 ) goto error;
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380 if( CompileCustomFunctions() < 0 ) goto error; /* Call custom 'C' call builder. */
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383 DumpMemory( dic->dic_HeaderBase, 256 );
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384 DumpMemory( dic->dic_CodeBase, 256 );
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387 pfDebugMessage("pfBuildDictionary: Finished adding dictionary entries.\n");
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388 return (PForthDictionary) dic;
\r
391 pfDebugMessage("pfBuildDictionary: Error adding dictionary entries.\n");
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392 pfDeleteDictionary( dic );
\r
398 #endif /* !PF_NO_INIT */
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401 ** ( xt -- nfa 1 , x 0 , find NFA in dictionary from XT )
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402 ** 1 for IMMEDIATE values
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404 cell_t ffTokenToName( ExecToken XT, const ForthString **NFAPtr )
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406 const ForthString *NameField;
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407 cell_t Searching = TRUE;
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411 NameField = (ForthString *) gVarContext;
\r
412 DBUGX(("\ffCodeToName: gVarContext = 0x%x\n", gVarContext));
\r
416 TempXT = NameToToken( NameField );
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420 DBUGX(("ffCodeToName: NFA = 0x%x\n", NameField));
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421 *NFAPtr = NameField ;
\r
427 NameField = NameToPrevious( NameField );
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428 if( NameField == NULL )
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434 } while ( Searching);
\r
440 ** ( $name -- $addr 0 | nfa -1 | nfa 1 , find NFA in dictionary )
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441 ** 1 for IMMEDIATE values
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443 cell_t ffFindNFA( const ForthString *WordName, const ForthString **NFAPtr )
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445 const ForthString *WordChar;
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447 const char *NameField, *NameChar;
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449 cell_t Searching = TRUE;
\r
452 WordLen = (uint8_t) ((ucell_t)*WordName & 0x1F);
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453 WordChar = WordName+1;
\r
455 NameField = (ForthString *) gVarContext;
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456 DBUG(("\nffFindNFA: WordLen = %d, WordName = %*s\n", WordLen, WordLen, WordChar ));
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457 DBUG(("\nffFindNFA: gVarContext = 0x%x\n", gVarContext));
\r
460 NameLen = (uint8_t) ((ucell_t)(*NameField) & MASK_NAME_SIZE);
\r
461 NameChar = NameField+1;
\r
462 /* DBUG((" %c\n", (*NameField & FLAG_SMUDGE) ? 'S' : 'V' )); */
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463 if( ((*NameField & FLAG_SMUDGE) == 0) &&
\r
464 (NameLen == WordLen) &&
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465 ffCompareTextCaseN( NameChar, WordChar, WordLen ) ) /* FIXME - slow */
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467 DBUG(("ffFindNFA: found it at NFA = 0x%x\n", NameField));
\r
468 *NFAPtr = NameField ;
\r
469 Result = ((*NameField) & FLAG_IMMEDIATE) ? 1 : -1;
\r
474 NameField = NameToPrevious( NameField );
\r
475 if( NameField == NULL )
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477 *NFAPtr = WordName;
\r
481 } while ( Searching);
\r
482 DBUG(("ffFindNFA: returns 0x%x\n", Result));
\r
487 /***************************************************************
\r
488 ** ( $name -- $name 0 | xt -1 | xt 1 )
\r
489 ** 1 for IMMEDIATE values
\r
491 cell_t ffFind( const ForthString *WordName, ExecToken *pXT )
\r
493 const ForthString *NFA;
\r
496 Result = ffFindNFA( WordName, &NFA );
\r
497 DBUG(("ffFind: %8s at 0x%x\n", WordName+1, NFA)); /* WARNING, not NUL terminated. %Q */
\r
500 *pXT = NameToToken( NFA );
\r
504 *pXT = (ExecToken) WordName;
\r
510 /****************************************************************
\r
511 ** Find name when passed 'C' string.
\r
513 cell_t ffFindC( const char *WordName, ExecToken *pXT )
\r
515 DBUG(("ffFindC: %s\n", WordName ));
\r
516 CStringToForth( gScratch, WordName );
\r
517 return ffFind( gScratch, pXT );
\r
521 /***********************************************************/
\r
522 /********* Compiling New Words *****************************/
\r
523 /***********************************************************/
\r
524 #define DIC_SAFETY_MARGIN (400)
\r
526 /*************************************************************
\r
527 ** Check for dictionary overflow.
\r
529 static cell_t ffCheckDicRoom( void )
\r
532 RoomLeft = (char *)gCurrentDictionary->dic_HeaderLimit -
\r
533 (char *)gCurrentDictionary->dic_HeaderPtr;
\r
534 if( RoomLeft < DIC_SAFETY_MARGIN )
\r
536 pfReportError("ffCheckDicRoom", PF_ERR_HEADER_ROOM);
\r
537 return PF_ERR_HEADER_ROOM;
\r
540 RoomLeft = (char *)gCurrentDictionary->dic_CodeLimit -
\r
541 (char *)gCurrentDictionary->dic_CodePtr.Byte;
\r
542 if( RoomLeft < DIC_SAFETY_MARGIN )
\r
544 pfReportError("ffCheckDicRoom", PF_ERR_CODE_ROOM);
\r
545 return PF_ERR_CODE_ROOM;
\r
550 /*************************************************************
\r
551 ** Create a dictionary entry given a string name.
\r
553 void ffCreateSecondaryHeader( const ForthStringPtr FName)
\r
555 pfDebugMessage("ffCreateSecondaryHeader()\n");
\r
556 /* Check for dictionary overflow. */
\r
557 if( ffCheckDicRoom() ) return;
\r
559 pfDebugMessage("ffCreateSecondaryHeader: CheckRedefinition()\n");
\r
560 CheckRedefinition( FName );
\r
561 /* Align CODE_HERE */
\r
562 CODE_HERE = (cell_t *)( (((ucell_t)CODE_HERE) + UINT32_MASK) & ~UINT32_MASK);
\r
563 CreateDicEntry( (ExecToken) ABS_TO_CODEREL(CODE_HERE), FName, FLAG_SMUDGE );
\r
566 /*************************************************************
\r
567 ** Begin compiling a secondary word.
\r
569 static void ffStringColon( const ForthStringPtr FName)
\r
571 ffCreateSecondaryHeader( FName );
\r
575 /*************************************************************
\r
576 ** Read the next ExecToken from the Source and create a word.
\r
578 void ffColon( void )
\r
582 gDepthAtColon = DATA_STACK_DEPTH;
\r
584 FName = ffWord( BLANK );
\r
587 ffStringColon( FName );
\r
591 /*************************************************************
\r
592 ** Check to see if name is already in dictionary.
\r
594 static cell_t CheckRedefinition( const ForthStringPtr FName )
\r
599 flag = ffFind( FName, &XT);
\r
600 if ( flag && !gVarQuiet)
\r
602 ioType( FName+1, (cell_t) *FName );
\r
603 MSG( " redefined.\n" ); /* FIXME - allow user to run off this warning. */
\r
608 void ffStringCreate( char *FName)
\r
610 ffCreateSecondaryHeader( FName );
\r
612 CODE_COMMA( ID_CREATE_P );
\r
613 CODE_COMMA( ID_EXIT );
\r
614 ffFinishSecondary();
\r
618 /* Read the next ExecToken from the Source and create a word. */
\r
619 void ffCreate( void )
\r
623 FName = ffWord( BLANK );
\r
626 ffStringCreate( FName );
\r
630 void ffStringDefer( const ForthStringPtr FName, ExecToken DefaultXT )
\r
632 pfDebugMessage("ffStringDefer()\n");
\r
633 ffCreateSecondaryHeader( FName );
\r
635 CODE_COMMA( ID_DEFER_P );
\r
636 CODE_COMMA( DefaultXT );
\r
638 ffFinishSecondary();
\r
642 /* Convert name then create deferred dictionary entry. */
\r
643 static void CreateDeferredC( ExecToken DefaultXT, const char *CName )
\r
646 CStringToForth( FName, CName );
\r
647 ffStringDefer( FName, DefaultXT );
\r
651 /* Read the next token from the Source and create a word. */
\r
652 void ffDefer( void )
\r
656 FName = ffWord( BLANK );
\r
659 ffStringDefer( FName, ID_QUIT_P );
\r
663 /* Unsmudge the word to make it visible. */
\r
664 void ffUnSmudge( void )
\r
666 *(char*)gVarContext &= ~FLAG_SMUDGE;
\r
670 ThrowCode ffSemiColon( void )
\r
672 ThrowCode exception = 0;
\r
675 if( (gDepthAtColon != DATA_STACK_DEPTH) &&
\r
676 (gDepthAtColon != DEPTH_AT_COLON_INVALID) ) /* Ignore if no ':' */
\r
678 exception = THROW_SEMICOLON;
\r
682 ffFinishSecondary();
\r
684 gDepthAtColon = DEPTH_AT_COLON_INVALID;
\r
688 /* Finish the definition of a Forth word. */
\r
689 void ffFinishSecondary( void )
\r
691 CODE_COMMA( ID_EXIT );
\r
695 /**************************************************************/
\r
696 /* Used to pull a number from the dictionary to the stack */
\r
697 void ff2Literal( cell_t dHi, cell_t dLo )
\r
699 CODE_COMMA( ID_2LITERAL_P );
\r
703 void ffALiteral( cell_t Num )
\r
705 CODE_COMMA( ID_ALITERAL_P );
\r
708 void ffLiteral( cell_t Num )
\r
710 CODE_COMMA( ID_LITERAL_P );
\r
714 #ifdef PF_SUPPORT_FP
\r
715 void ffFPLiteral( PF_FLOAT fnum )
\r
717 /* Hack for Metrowerks complier which won't compile the
\r
718 * original expression.
\r
723 /* Make sure that literal float data is float aligned. */
\r
724 dicPtr = CODE_HERE + 1;
\r
725 while( (((ucell_t) dicPtr++) & (sizeof(PF_FLOAT) - 1)) != 0)
\r
727 DBUG((" comma NOOP to align FPLiteral\n"));
\r
728 CODE_COMMA( ID_NOOP );
\r
730 CODE_COMMA( ID_FP_FLITERAL_P );
\r
732 temp = (PF_FLOAT *)CODE_HERE;
\r
733 WRITE_FLOAT_DIC(temp,fnum); /* Write to dictionary. */
\r
735 CODE_HERE = (cell_t *) temp;
\r
737 #endif /* PF_SUPPORT_FP */
\r
739 /**************************************************************/
\r
740 ThrowCode FindAndCompile( const char *theWord )
\r
745 ThrowCode exception = 0;
\r
747 Flag = ffFind( theWord, &XT);
\r
748 DBUG(("FindAndCompile: theWord = %8s, XT = 0x%x, Flag = %d\n", theWord, XT, Flag ));
\r
750 /* Is it a normal word ? */
\r
753 if( gVarState ) /* compiling? */
\r
759 exception = pfCatch( XT );
\r
762 else if ( Flag == 1 ) /* or is it IMMEDIATE ? */
\r
764 DBUG(("FindAndCompile: IMMEDIATE, theWord = 0x%x\n", theWord ));
\r
765 exception = pfCatch( XT );
\r
767 else /* try to interpret it as a number. */
\r
769 /* Call deferred NUMBER? */
\r
772 DBUG(("FindAndCompile: not found, try number?\n" ));
\r
773 PUSH_DATA_STACK( theWord ); /* Push text of number */
\r
774 exception = pfCatch( gNumberQ_XT );
\r
775 if( exception ) goto error;
\r
777 DBUG(("FindAndCompile: after number?\n" ));
\r
778 NumResult = POP_DATA_STACK; /* Success? */
\r
779 switch( NumResult )
\r
781 case NUM_TYPE_SINGLE:
\r
782 if( gVarState ) /* compiling? */
\r
784 Num = POP_DATA_STACK;
\r
789 case NUM_TYPE_DOUBLE:
\r
790 if( gVarState ) /* compiling? */
\r
792 Num = POP_DATA_STACK; /* get hi portion */
\r
793 ff2Literal( Num, POP_DATA_STACK );
\r
797 #ifdef PF_SUPPORT_FP
\r
798 case NUM_TYPE_FLOAT:
\r
799 if( gVarState ) /* compiling? */
\r
801 ffFPLiteral( *gCurrentTask->td_FloatStackPtr++ );
\r
808 ioType( theWord+1, *theWord );
\r
809 MSG( " ? - unrecognized word!\n" );
\r
810 exception = THROW_UNDEFINED_WORD;
\r
819 /**************************************************************
\r
820 ** Forth outer interpreter. Parses words from Source.
\r
821 ** Executes them or compiles them based on STATE.
\r
823 ThrowCode ffInterpret( void )
\r
827 ThrowCode exception = 0;
\r
829 /* Is there any text left in Source ? */
\r
830 while( gCurrentTask->td_IN < (gCurrentTask->td_SourceNum) )
\r
833 pfDebugMessage("ffInterpret: calling ffWord(()\n");
\r
834 theWord = ffWord( BLANK );
\r
835 DBUG(("ffInterpret: theWord = 0x%x, Len = %d\n", theWord, *theWord ));
\r
840 if( gLocalCompiler_XT )
\r
842 PUSH_DATA_STACK( theWord ); /* Push word. */
\r
843 exception = pfCatch( gLocalCompiler_XT );
\r
844 if( exception ) goto error;
\r
845 flag = POP_DATA_STACK; /* Compiled local? */
\r
849 exception = FindAndCompile( theWord );
\r
850 if( exception ) goto error;
\r
854 DBUG(("ffInterpret: IN=%d, SourceNum=%d\n", gCurrentTask->td_IN,
\r
855 gCurrentTask->td_SourceNum ) );
\r
861 /**************************************************************/
\r
862 ThrowCode ffOK( void )
\r
864 cell_t exception = 0;
\r
865 /* Check for stack underflow. %Q what about overflows? */
\r
866 if( (gCurrentTask->td_StackBase - gCurrentTask->td_StackPtr) < 0 )
\r
868 exception = THROW_STACK_UNDERFLOW;
\r
870 #ifdef PF_SUPPORT_FP /* Check floating point stack too! */
\r
871 else if((gCurrentTask->td_FloatStackBase - gCurrentTask->td_FloatStackPtr) < 0)
\r
873 exception = THROW_FLOAT_STACK_UNDERFLOW;
\r
876 else if( gCurrentTask->td_InputStream == PF_STDIN)
\r
878 if( !gVarState ) /* executing? */
\r
883 if(gVarTraceStack) ffDotS();
\r
894 /***************************************************************
\r
895 ** Cleanup Include stack by popping and closing files.
\r
896 ***************************************************************/
\r
897 void pfHandleIncludeError( void )
\r
901 while( (cur = ffPopInputStream()) != PF_STDIN)
\r
903 DBUG(("ffCleanIncludeStack: closing 0x%x\n", cur ));
\r
908 /***************************************************************
\r
909 ** Interpret input in a loop.
\r
910 ***************************************************************/
\r
911 ThrowCode ffOuterInterpreterLoop( void )
\r
913 cell_t exception = 0;
\r
916 exception = ffRefill();
\r
917 if(exception <= 0) break;
\r
919 exception = ffInterpret();
\r
920 if( exception == 0 )
\r
922 exception = ffOK();
\r
925 } while( exception == 0 );
\r
929 /***************************************************************
\r
930 ** Include then close a file
\r
931 ***************************************************************/
\r
933 ThrowCode ffIncludeFile( FileStream *InputFile )
\r
935 ThrowCode exception;
\r
937 /* Push file stream. */
\r
938 exception = ffPushInputStream( InputFile );
\r
939 if( exception < 0 ) return exception;
\r
941 /* Run outer interpreter for stream. */
\r
942 exception = ffOuterInterpreterLoop();
\r
946 /* Report line number and nesting level. */
\r
947 MSG("INCLUDE error on line #"); ffDot(gCurrentTask->td_LineNumber);
\r
948 MSG(", level = "); ffDot(gIncludeIndex );
\r
951 /* Dump line of error and show offset in line for >IN */
\r
952 for( i=0; i<gCurrentTask->td_SourceNum; i++ )
\r
954 char c = gCurrentTask->td_SourcePtr[i];
\r
955 if( c == '\t' ) c = ' ';
\r
959 for( i=0; i<(gCurrentTask->td_IN - 1); i++ ) EMIT('^');
\r
963 /* Pop file stream. */
\r
964 ffPopInputStream();
\r
966 /* ANSI spec specifies that this should also close the file. */
\r
967 sdCloseFile(InputFile);
\r
972 #endif /* !PF_NO_SHELL */
\r
974 /***************************************************************
\r
975 ** Save current input stream on stack, use this new one.
\r
976 ***************************************************************/
\r
977 Err ffPushInputStream( FileStream *InputFile )
\r
982 /* Push current input state onto special include stack. */
\r
983 if( gIncludeIndex < MAX_INCLUDE_DEPTH )
\r
985 inf = &gIncludeStack[gIncludeIndex++];
\r
986 inf->inf_FileID = gCurrentTask->td_InputStream;
\r
987 inf->inf_IN = gCurrentTask->td_IN;
\r
988 inf->inf_LineNumber = gCurrentTask->td_LineNumber;
\r
989 inf->inf_SourceNum = gCurrentTask->td_SourceNum;
\r
990 /* Copy TIB plus any NUL terminator into saved area. */
\r
991 if( (inf->inf_SourceNum > 0) && (inf->inf_SourceNum < (TIB_SIZE-1)) )
\r
993 pfCopyMemory( inf->inf_SaveTIB, gCurrentTask->td_TIB, inf->inf_SourceNum+1 );
\r
996 /* Set new current input. */
\r
997 DBUG(( "ffPushInputStream: InputFile = 0x%x\n", InputFile ));
\r
998 gCurrentTask->td_InputStream = InputFile;
\r
999 gCurrentTask->td_LineNumber = 0;
\r
1003 ERR("ffPushInputStream: max depth exceeded.\n");
\r
1011 /***************************************************************
\r
1012 ** Go back to reading previous stream.
\r
1013 ** Just return gCurrentTask->td_InputStream upon underflow.
\r
1014 ***************************************************************/
\r
1015 FileStream *ffPopInputStream( void )
\r
1017 IncludeFrame *inf;
\r
1018 FileStream *Result;
\r
1020 DBUG(("ffPopInputStream: gIncludeIndex = %d\n", gIncludeIndex));
\r
1021 Result = gCurrentTask->td_InputStream;
\r
1023 /* Restore input state. */
\r
1024 if( gIncludeIndex > 0 )
\r
1026 inf = &gIncludeStack[--gIncludeIndex];
\r
1027 gCurrentTask->td_InputStream = inf->inf_FileID;
\r
1028 DBUG(("ffPopInputStream: stream = 0x%x\n", gCurrentTask->td_InputStream ));
\r
1029 gCurrentTask->td_IN = inf->inf_IN;
\r
1030 gCurrentTask->td_LineNumber = inf->inf_LineNumber;
\r
1031 gCurrentTask->td_SourceNum = inf->inf_SourceNum;
\r
1032 /* Copy TIB plus any NUL terminator into saved area. */
\r
1033 if( (inf->inf_SourceNum > 0) && (inf->inf_SourceNum < (TIB_SIZE-1)) )
\r
1035 pfCopyMemory( gCurrentTask->td_TIB, inf->inf_SaveTIB, inf->inf_SourceNum+1 );
\r
1039 DBUG(("ffPopInputStream: return = 0x%x\n", Result ));
\r
1044 /***************************************************************
\r
1045 ** Convert file pointer to value consistent with SOURCE-ID.
\r
1046 ***************************************************************/
\r
1047 cell_t ffConvertStreamToSourceID( FileStream *Stream )
\r
1050 if(Stream == PF_STDIN)
\r
1054 else if(Stream == NULL)
\r
1060 Result = (cell_t) Stream;
\r
1065 /***************************************************************
\r
1066 ** Convert file pointer to value consistent with SOURCE-ID.
\r
1067 ***************************************************************/
\r
1068 FileStream * ffConvertSourceIDToStream( cell_t id )
\r
1070 FileStream *stream;
\r
1074 stream = PF_STDIN;
\r
1076 else if( id == -1 )
\r
1082 stream = (FileStream *) id;
\r
1087 /**************************************************************
\r
1088 ** Receive line from input stream.
\r
1089 ** Return length, or -1 for EOF.
\r
1091 #define BACKSPACE (8)
\r
1092 static cell_t readLineFromStream( char *buffer, cell_t maxChars, FileStream *stream )
\r
1097 static int lastChar = 0;
\r
1100 DBUGX(("readLineFromStream(0x%x, 0x%x, 0x%x)\n", buffer, len, stream ));
\r
1103 while( (len < maxChars) && !done )
\r
1105 c = sdInputChar(stream);
\r
1111 if( len <= 0 ) len = -1;
\r
1115 DBUGX(("EOL=\\n\n"));
\r
1116 if( lastChar != '\r' ) done = 1;
\r
1120 DBUGX(("EOL=\\r\n"));
\r
1132 /* NUL terminate line to simplify printing when debugging. */
\r
1133 if( (len >= 0) && (len < maxChars) ) p[len] = '\0';
\r
1138 /**************************************************************
\r
1139 ** ( -- , fill Source from current stream )
\r
1140 ** Return 1 if successful, 0 for EOF, or a negative error.
\r
1142 cell_t ffRefill( void )
\r
1145 cell_t Result = 1;
\r
1147 /* reset >IN for parser */
\r
1148 gCurrentTask->td_IN = 0;
\r
1150 /* get line from current stream */
\r
1151 if( gCurrentTask->td_InputStream == PF_STDIN )
\r
1153 /* ACCEPT is deferred so we call it through the dictionary. */
\r
1154 PUSH_DATA_STACK( gCurrentTask->td_SourcePtr );
\r
1155 PUSH_DATA_STACK( TIB_SIZE );
\r
1156 pfCatch( gAcceptP_XT );
\r
1157 Num = POP_DATA_STACK;
\r
1166 Num = readLineFromStream( gCurrentTask->td_SourcePtr, TIB_SIZE,
\r
1167 gCurrentTask->td_InputStream );
\r
1175 gCurrentTask->td_SourceNum = Num;
\r
1176 gCurrentTask->td_LineNumber++; /* Bump for include. */
\r
1178 /* echo input if requested */
\r
1179 if( gVarEcho && ( Num > 0))
\r
1181 ioType( gCurrentTask->td_SourcePtr, gCurrentTask->td_SourceNum );
\r