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

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                 codelab.c                                 */
   4 /*                                                                           */
   5 /*                           Code label structure                            */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2001     Ullrich von Bassewitz                                        */
  10 /*              Wacholderweg 14                                              */
  11 /*              D-70597 Stuttgart                                            */
  12 /* EMail:       uz@musoftware.de                                             */
  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 /* common */
  37 #include "xmalloc.h"
  38
  39 /* cc65 */
  40 #include "codeent.h"
  41 #include "codelab.h"
  42
  43
  44
  45 /*****************************************************************************/
  46 /*                                   Code                                    */
  47 /*****************************************************************************/
  48
  49
  50
  51 CodeLabel* NewCodeLabel (const char* Name, unsigned Hash)
  52 /* Create a new code label, initialize and return it */
  53 {
  54     /* Allocate memory */
  55     CodeLabel* L = xmalloc (sizeof (CodeLabel));
  56
  57     /* Initialize the fields */
  58     L->Next  = 0;
  59     L->Name  = xstrdup (Name);
  60     L->Hash  = Hash;
  61     L->Flags = 0;
  62     L->Owner = 0;
  63     InitCollection (&L->JumpFrom);
  64
  65     /* Return the new label */
  66     return L;
  67 }
  68
  69
  70
  71 void FreeCodeLabel (CodeLabel* L)
  72 /* Free the given code label */
  73 {
  74     /* Free the name */
  75     xfree (L->Name);
  76
  77     /* Free the collection */
  78     DoneCollection (&L->JumpFrom);
  79
  80     /* Delete the struct */
  81     xfree (L);
  82 }
  83
  84
  85
  86 void AddLabelRef (CodeLabel* L, struct CodeEntry* E)
  87 /* Let the CodeEntry E reference the label L */
  88 {
  89     /* The insn at E jumps to this label */
  90     E->JumpTo = L;
  91
  92     /* Remember that in the label */
  93     CollAppend (&L->JumpFrom, E);
  94 }
  95
  96
  97
  98 unsigned RemoveLabelRef (CodeLabel* L, const struct CodeEntry* E)
  99 /* Remove a reference to this label, return the number of remaining references */
 100 {
 101     /* Delete the item */
 102     CollDeleteItem (&L->JumpFrom, E);
 103
 104     /* Return the number of remaining references */
 105     return CollCount (&L->JumpFrom);
 106 }
 107
 108
 109
 110 void OutputCodeLabel (const CodeLabel* L, FILE* F)
 111 /* Output the code label to a file */
 112 {
 113     fprintf (F, "%s:", L->Name);
 114 }
 115
 116
 117