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) 2000-2001 Ullrich von Bassewitz                                       */
  10 /*               Wacholderweg 14                                             */
  11 /*               D-70597 Stuttgart                                           */
  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 "symentry.h"
  43
  44
  45
  46 /*****************************************************************************/
  47 /*                                   Code                                    */
  48 /*****************************************************************************/
  49
  50
  51
  52 SymEntry* NewSymEntry (const char* Name, unsigned Flags)
  53 /* Create a new symbol table with the given name */
  54 {
  55     /* Get the length of the name */
  56     unsigned Len = strlen (Name);
  57
  58     /* Allocate memory for the symbol entry */
  59     SymEntry* E = xmalloc (sizeof (SymEntry) + Len);
  60
  61     /* Initialize the entry */
  62     E->NextHash = 0;
  63     E->PrevSym  = 0;
  64     E->NextSym  = 0;
  65     E->Link     = 0;
  66     E->Owner    = 0;
  67     E->Flags    = Flags;
  68     E->Type     = 0;
  69     memcpy (E->Name, Name, Len+1);
  70
  71     /* Return the new entry */
  72     return E;
  73 }
  74
  75
  76
  77 void FreeSymEntry (SymEntry* E)
  78 /* Free a symbol entry */
  79 {
  80     TypeFree (E->Type);
  81     xfree (E);
  82 }
  83
  84
  85
  86 void DumpSymEntry (FILE* F, const SymEntry* E)
  87 /* Dump the given symbol table entry to the file in readable form */
  88 {
  89     static const struct {
  90         const char*         Name;
  91         unsigned            Val;
  92     } Flags [] = {
  93         /* Beware: Order is important! */
  94         { "SC_TYPEDEF",     SC_TYPEDEF  },
  95         { "SC_SFLD",        SC_SFLD     },
  96         { "SC_STRUCT",      SC_STRUCT   },
  97         { "SC_AUTO",        SC_AUTO     },
  98         { "SC_REGISTER",    SC_REGISTER },
  99         { "SC_STATIC",      SC_STATIC   },
 100         { "SC_EXTERN",      SC_EXTERN   },
 101         { "SC_ENUM",        SC_ENUM     },
 102         { "SC_CONST",       SC_CONST    },
 103         { "SC_LABEL",       SC_LABEL    },
 104         { "SC_PARAM",       SC_PARAM    },
 105         { "SC_FUNC",        SC_FUNC     },
 106         { "SC_STORAGE",     SC_STORAGE  },
 107         { "SC_DEF",         SC_DEF      },
 108         { "SC_REF",         SC_REF      },
 109         { "SC_ZEROPAGE",    SC_ZEROPAGE },
 110     };
 111
 112     unsigned I;
 113     unsigned SymFlags;
 114
 115     /* Print the name */
 116     fprintf (F, "%s:\n", E->Name);
 117
 118     /* Print the flags */
 119     SymFlags = E->Flags;
 120     fprintf (F, "    Flags: ");
 121     for (I = 0; I < sizeof (Flags) / sizeof (Flags[0]) && SymFlags != 0; ++I) {
 122         if ((SymFlags & Flags[I].Val) == Flags[I].Val) {
 123             SymFlags &= ~Flags[I].Val;
 124             fprintf (F, "%s ", Flags[I].Name);
 125         }
 126     }
 127     if (SymFlags != 0) {
 128         fprintf (F, "%04X", SymFlags);
 129     }
 130     fprintf (F, "\n");
 131
 132     /* Print the type */
 133     fprintf (F, "    Type:  ");
 134     if (E->Type) {
 135         PrintType (F, E->Type);
 136     } else {
 137         fprintf (F, "(none)");
 138     }
 139     fprintf (F, "\n");
 140 }
 141
 142
 143
 144 int IsTypeDef (const SymEntry* E)
 145 /* Return true if the given entry is a typedef entry */
 146 {
 147     return ((E->Flags & SC_TYPEDEF) == SC_TYPEDEF);
 148 }
 149
 150
 151
 152 void ChangeSymType (SymEntry* Entry, type* Type)
 153 /* Change the type of the given symbol */
 154 {
 155     TypeFree (Entry->Type);
 156     Entry->Type = TypeDup (Type);
 157 }
 158
 159
 160
 161