git.sur5r.net Git - cc65/blob - src/ca65/symentry.h

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                symentry.h                                 */
   4 /*                                                                           */
   5 /*          Symbol table entry forward for the ca65 macroassembler           */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 1998-2003 Ullrich von Bassewitz                                       */
  10 /*               Römerstrasse 52                                             */
  11 /*               D-70794 Filderstadt                                         */
  12 /* EMail:        uz@cc65.org                                                 */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 #ifndef SYMENTRY_H
  37 #define SYMENTRY_H
  38
  39
  40
  41 /* common */
  42 #include "cddefs.h"
  43 #include "filepos.h"
  44
  45
  46
  47 /*****************************************************************************/
  48 /*                                   Data                                    */
  49 /*****************************************************************************/
  50
  51
  52
  53 /* Bits for the Flags value in SymEntry */
  54 #define SF_NONE         0x0000          /* Empty flag set */
  55 #define SF_USER         0x0001          /* User bit */
  56 #define SF_TRAMPOLINE   0x0002          /* Trampoline entry */
  57 #define SF_EXPORT       0x0004          /* Export this symbol */
  58 #define SF_IMPORT       0x0008          /* Import this symbol */
  59 #define SF_GLOBAL       0x0010          /* Global symbol */
  60 #define SF_ZP           0x0020          /* Declared as zeropage symbol */
  61 #define SF_ABS          0x0040          /* Declared as absolute symbol */
  62 #define SF_LABEL        0x0080          /* Used as a label */
  63 #define SF_FORCED       0x0100          /* Forced import, SF_IMPORT also set */
  64 #define SF_FINALIZED    0x0200          /* Symbol is finalized */
  65 #define SF_INDEXED      0x0800          /* Index is valid */
  66 #define SF_CONST        0x1000          /* The symbol has a constant value */
  67 #define SF_MULTDEF      0x2000          /* Multiply defined symbol */
  68 #define SF_DEFINED      0x4000          /* Defined */
  69 #define SF_REFERENCED   0x8000          /* Referenced */
  70
  71 /* Structure of a symbol table entry */
  72 typedef struct SymEntry SymEntry;
  73 struct SymEntry {
  74     SymEntry*               Left;       /* Lexically smaller entry */
  75     SymEntry*               Right;      /* Lexically larger entry */
  76     SymEntry*               List;       /* List of all entries */
  77     SymEntry*               Locals;     /* Root of subtree for local symbols */
  78     struct SymTable*        SymTab;     /* Table this symbol is in, 0 for locals */
  79     FilePos                 Pos;        /* File position for this symbol */
  80     unsigned                Flags;      /* Symbol flags */
  81     unsigned                Index;      /* Index of import/export entries */
  82     union {
  83         struct ExprNode*    Expr;       /* Expression if CONST not set */
  84         long                Val;        /* Value (if CONST set) */
  85         SymEntry*           Sym;        /* Symbol (if trampoline entry) */
  86     } V;
  87     unsigned char           ConDesPrio[CD_TYPE_COUNT];  /* ConDes priorities... */
  88                                         /* ...actually value+1 (used as flag) */
  89     char                    Name [1];   /* Dynamic allocation */
  90 };
  91
  92 /* List of all symbol table entries */
  93 extern SymEntry* SymList;
  94
  95
  96
  97 /*****************************************************************************/
  98 /*                                   Code                                    */
  99 /*****************************************************************************/
 100
 101
 102
 103 SymEntry* NewSymEntry (const char* Name);
 104 /* Allocate a symbol table entry, initialize and return it */
 105
 106
 107
 108 /* End of symentry.h */
 109
 110 #endif
 111
 112
 113