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

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                  loop.c                                   */
   4 /*                                                                           */
   5 /*                              Loop management                              */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 1998-2000 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 "error.h"
  41 #include "loop.h"
  42
  43
  44
  45 /*****************************************************************************/
  46 /*                                   Data                                    */
  47 /*****************************************************************************/
  48
  49
  50
  51 /* The root */
  52 static LoopDesc* LoopStack = 0;
  53
  54
  55
  56 /*****************************************************************************/
  57 /*                                   Code                                    */
  58 /*****************************************************************************/
  59
  60
  61
  62 LoopDesc* AddLoop (unsigned sp, unsigned loop, unsigned label,
  63                    unsigned linc, unsigned lstat)
  64 /* Create and add a new loop descriptor */
  65 {
  66     /* Allocate a new struct */
  67     LoopDesc* L = (LoopDesc*) xmalloc (sizeof (LoopDesc));
  68
  69     /* Fill in the data */
  70     L->StackPtr = sp;
  71     L->Loop     = loop;
  72     L->Label    = label;
  73     L->linc     = linc;
  74     L->lstat    = lstat;
  75
  76     /* Insert it into the list */
  77     L->Next = LoopStack;
  78     LoopStack = L;
  79
  80     /* Return a pointer to the struct */
  81     return L;
  82 }
  83
  84
  85
  86 LoopDesc* CurrentLoop (void)
  87 /* Return a pointer to the descriptor of the current loop */
  88 {
  89     return LoopStack;
  90 }
  91
  92
  93
  94 void DelLoop (void)
  95 /* Remove the current loop */
  96 {
  97     LoopDesc* L = LoopStack;
  98     LoopStack = LoopStack->Next;
  99     xfree (L);
 100 }
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