git.sur5r.net Git - cc65/blob - src/cc65/symentry.c

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                symentry.c                                 */
   4 /*                                                                           */
   5 /*               Symbol table entries for the cc65 C compiler                */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2000-2009, Ullrich von Bassewitz                                      */
  10 /*                Roemerstrasse 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 #include <string.h>
  37
  38 /* common */
  39 #include "xmalloc.h"
  40
  41 /* cc65 */
  42 #include "anonname.h"
  43 #include "symentry.h"
  44
  45
  46
  47 /*****************************************************************************/
  48 /*                                   Code                                    */
  49 /*****************************************************************************/
  50
  51
  52
  53 SymEntry* NewSymEntry (const char* Name, unsigned Flags)
  54 /* Create a new symbol table with the given name */
  55 {
  56     /* Get the length of the name */
  57     unsigned Len = strlen (Name);
  58
  59     /* Allocate memory for the symbol entry */
  60     SymEntry* E = xmalloc (sizeof (SymEntry) + Len);
  61
  62     /* Initialize the entry */
  63     E->NextHash = 0;
  64     E->PrevSym  = 0;
  65     E->NextSym  = 0;
  66     E->Link     = 0;
  67     E->Owner    = 0;
  68     E->Flags    = Flags;
  69     E->Type     = 0;
  70     E->AsmName  = 0;
  71     memcpy (E->Name, Name, Len+1);
  72
  73     /* Return the new entry */
  74     return E;
  75 }
  76
  77
  78
  79 void FreeSymEntry (SymEntry* E)
  80 /* Free a symbol entry */
  81 {
  82     TypeFree (E->Type);
  83     xfree (E->AsmName);
  84     xfree (E);
  85 }
  86
  87
  88
  89 void DumpSymEntry (FILE* F, const SymEntry* E)
  90 /* Dump the given symbol table entry to the file in readable form */
  91 {
  92     static const struct {
  93         const char*         Name;
  94         unsigned            Val;
  95     } Flags [] = {
  96         /* Beware: Order is important! */
  97         { "SC_TYPEDEF",     SC_TYPEDEF          },
  98         { "SC_BITFIELD",    SC_BITFIELD         },
  99         { "SC_STRUCTFIELD", SC_STRUCTFIELD      },
 100         { "SC_STRUCT",      SC_STRUCT           },
 101         { "SC_AUTO",        SC_AUTO             },
 102         { "SC_REGISTER",    SC_REGISTER         },
 103         { "SC_STATIC",      SC_STATIC           },
 104         { "SC_EXTERN",      SC_EXTERN           },
 105         { "SC_ENUM",        SC_ENUM             },
 106         { "SC_CONST",       SC_CONST            },
 107         { "SC_LABEL",       SC_LABEL            },
 108         { "SC_PARAM",       SC_PARAM            },
 109         { "SC_FUNC",        SC_FUNC             },
 110         { "SC_STORAGE",     SC_STORAGE          },
 111         { "SC_DEF",         SC_DEF              },
 112         { "SC_REF",         SC_REF              },
 113         { "SC_ZEROPAGE",    SC_ZEROPAGE         },
 114     };
 115
 116     unsigned I;
 117     unsigned SymFlags;
 118
 119     /* Print the name */
 120     fprintf (F, "%s:\n", E->Name);
 121
 122     /* Print the assembler name if we have one */
 123     if (E->AsmName) {
 124         fprintf (F, "    AsmName: %s\n", E->AsmName);
 125     }
 126
 127     /* Print the flags */
 128     SymFlags = E->Flags;
 129     fprintf (F, "    Flags: ");
 130     for (I = 0; I < sizeof (Flags) / sizeof (Flags[0]) && SymFlags != 0; ++I) {
 131         if ((SymFlags & Flags[I].Val) == Flags[I].Val) {
 132             SymFlags &= ~Flags[I].Val;
 133             fprintf (F, "%s ", Flags[I].Name);
 134         }
 135     }
 136     if (SymFlags != 0) {
 137         fprintf (F, "%04X", SymFlags);
 138     }
 139     fprintf (F, "\n");
 140
 141     /* Print the type */
 142     fprintf (F, "    Type:  ");
 143     if (E->Type) {
 144         PrintType (F, E->Type);
 145     } else {
 146         fprintf (F, "(none)");
 147     }
 148     fprintf (F, "\n");
 149 }
 150
 151
 152
 153 void CvtRegVarToAuto (SymEntry* Sym)
 154 /* Convert a register variable to an auto variable */
 155 {
 156     /* Change the storage class */
 157     Sym->Flags = (Sym->Flags & ~(SC_REGISTER | SC_STATIC | SC_EXTERN)) | SC_AUTO;
 158
 159     /* Transfer the stack offset from register save area to actual offset */
 160     Sym->V.Offs = Sym->V.R.SaveOffs;
 161 }
 162
 163
 164
 165 void ChangeSymType (SymEntry* Entry, Type* T)
 166 /* Change the type of the given symbol */
 167 {
 168     TypeFree (Entry->Type);
 169     Entry->Type = TypeDup (T);
 170 }
 171
 172
 173
 174 void ChangeAsmName (SymEntry* Entry, const char* NewAsmName)
 175 /* Change the assembler name of the symbol */
 176 {
 177     xfree (Entry->AsmName);
 178     Entry->AsmName = xstrdup (NewAsmName);
 179 }
 180
 181
 182
 183 int HasAnonName (const SymEntry* Entry)
 184 /* Return true if the symbol entry has an anonymous name */
 185 {
 186     return IsAnonName (Entry->Name);
 187 }
 188
 189
 190