git.sur5r.net Git - cc65/blob - src/ca65/asserts.c

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                 asserts.c                                 */
   4 /*                                                                           */
   5 /*               Linker assertions for the ca65 crossassembler               */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2003-2008, 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 /* common */
  37 #include "assertdefs.h"
  38 #include "coll.h"
  39 #include "xmalloc.h"
  40
  41 /* ca65 */
  42 #include "asserts.h"
  43 #include "error.h"
  44 #include "expr.h"
  45 #include "objfile.h"
  46 #include "scanner.h"
  47 #include "spool.h"
  48
  49
  50
  51 /*****************************************************************************/
  52 /*                                   Data                                    */
  53 /*****************************************************************************/
  54
  55
  56
  57 /* An assertion entry */
  58 typedef struct Assertion Assertion;
  59 struct Assertion {
  60     ExprNode*   Expr;           /* Expression to evaluate */
  61     unsigned    Action;         /* Action to take */
  62     unsigned    Msg;            /* Message to print (if any) */
  63     FilePos     Pos;            /* File position of assertion */
  64 };
  65
  66 /* Collection with all assertions for a module */
  67 static Collection Assertions = STATIC_COLLECTION_INITIALIZER;
  68
  69
  70
  71 /*****************************************************************************/
  72 /*                                   Code                                    */
  73 /*****************************************************************************/
  74
  75
  76
  77 static Assertion* NewAssertion (ExprNode* Expr, unsigned Action, unsigned Msg)
  78 /* Create a new Assertion struct and return it */
  79 {
  80     /* Allocate memory */
  81     Assertion* A = xmalloc (sizeof (Assertion));
  82
  83     /* Initialize the fields */
  84     A->Expr     = Expr;
  85     A->Action   = Action;
  86     A->Msg      = Msg;
  87     A->Pos      = CurPos;
  88
  89     /* Return the new struct */
  90     return A;
  91 }
  92
  93
  94
  95 void AddAssertion (ExprNode* Expr, unsigned Action, unsigned Msg)
  96 /* Add an assertion to the assertion table */
  97 {
  98     /* Add an assertion object to the table */
  99     CollAppend (&Assertions, NewAssertion (Expr, Action, Msg));
 100 }
 101
 102
 103
 104 void CheckAssertions (void)
 105 /* Check all assertions and evaluate the ones we can evaluate here. */
 106 {
 107     unsigned I;
 108
 109     /* Get the number of assertions */
 110     unsigned Count = CollCount (&Assertions);
 111
 112     /* Check the assertions */
 113     for (I = 0; I < Count; ++I) {
 114
 115         /* Get the next assertion */
 116         Assertion* A = CollAtUnchecked (&Assertions, I);
 117
 118         /* Can we evaluate the expression? */
 119         long Val;
 120         if (IsConstExpr (A->Expr, &Val) && Val == 0) {
 121             /* Apply the action */
 122             const char* Msg = GetString (A->Msg);
 123             switch (A->Action) {
 124
 125                 case ASSERT_ACT_WARN:
 126                     PWarning (&A->Pos, 0, "%s", Msg);
 127                     break;
 128
 129                 case ASSERT_ACT_ERROR:
 130                     PError (&A->Pos, "%s", Msg);
 131                     break;
 132
 133                 default:
 134                     Internal ("Illegal assert action specifier");
 135                     break;
 136             }
 137         }
 138     }
 139 }
 140
 141
 142
 143 void WriteAssertions (void)
 144 /* Write the assertion table to the object file */
 145 {
 146     unsigned I;
 147
 148     /* Get the number of assertions */
 149     unsigned Count = CollCount (&Assertions);
 150
 151     /* Tell the object file module that we're about to start the assertions */
 152     ObjStartAssertions ();
 153
 154     /* Write the string count to the list */
 155     ObjWriteVar (Count);
 156
 157     /* Write the assertions */
 158     for (I = 0; I < Count; ++I) {
 159
 160         /* Get the next assertion */
 161         Assertion* A = CollAtUnchecked (&Assertions, I);
 162
 163         /* Write it to the file */
 164         WriteExpr (A->Expr);
 165         ObjWriteVar (A->Action);
 166         ObjWriteVar (A->Msg);
 167         ObjWritePos (&A->Pos);
 168     }
 169
 170     /* Done writing the assertions */
 171     ObjEndAssertions ();
 172 }
 173
 174
 175
 176