git.sur5r.net Git - cc65/blob - src/ld65/asserts.c

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                 asserts.c                                 */
   4 /*                                                                           */
   5 /*                      Assertions for the ld65 linker                       */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2003-2009, 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 /* common */
  37 #include "assertion.h"
  38 #include "coll.h"
  39 #include "xmalloc.h"
  40
  41 /* ld65 */
  42 #include "asserts.h"
  43 #include "error.h"
  44 #include "expr.h"
  45 #include "fileio.h"
  46 #include "objdata.h"
  47 #include "spool.h"
  48
  49
  50
  51 /*****************************************************************************/
  52 /*                                   Data                                    */
  53 /*****************************************************************************/
  54
  55
  56
  57 /* Assertion struct decl */
  58 struct Assertion {
  59     FilePos             Pos;            /* File position of assertion */
  60     ExprNode*           Expr;           /* Expression to evaluate */
  61     AssertAction        Action;         /* What to do */
  62     unsigned            Msg;            /* Message to print */
  63     ObjData*            Obj;            /* Object file containing the assertion */
  64 };
  65
  66 /* List with all assertions */
  67 static Collection Assertions = STATIC_COLLECTION_INITIALIZER;
  68
  69
  70
  71 /*****************************************************************************/
  72 /*                                   Code                                    */
  73 /*****************************************************************************/
  74
  75
  76
  77 Assertion* ReadAssertion (FILE* F, struct ObjData* O)
  78 /* Read an assertion from the given file */
  79 {
  80     /* Allocate memory */
  81     Assertion* A = xmalloc (sizeof (Assertion));
  82
  83     /* Read the fields from the file */
  84     A->Expr = ReadExpr (F, O);
  85     A->Action = (AssertAction) ReadVar (F);
  86     A->Msg = MakeGlobalStringId (O, ReadVar (F));
  87     ReadFilePos (F, &A->Pos);
  88
  89     /* Set remaining fields */
  90     A->Obj = O;
  91
  92     /* Add the assertion to the global list */
  93     CollAppend (&Assertions, A);
  94
  95     /* Return the new struct */
  96     return A;
  97 }
  98
  99
 100
 101 void CheckAssertions (void)
 102 /* Check all assertions */
 103 {
 104     unsigned I;
 105
 106     /* Walk over all assertions */
 107     for (I = 0; I < CollCount (&Assertions); ++I) {
 108
 109         /* Get the assertion */
 110         Assertion* A = CollAtUnchecked (&Assertions, I);
 111
 112         /* Ignore assertions that shouldn't be handled at link time */
 113         if (!AssertAtLinkTime (A->Action)) {
 114             continue;
 115         }
 116
 117         /* If the expression is not constant, we're not able to handle it */
 118         if (!IsConstExpr (A->Expr)) {
 119             Warning ("Cannot evaluate assertion in module `%s', line %lu",
 120                      GetSourceFileName (A->Obj, A->Pos.Name), A->Pos.Line);
 121         } else if (GetExprVal (A->Expr) == 0) {
 122
 123             /* Assertion failed */
 124             const char* Module  = GetSourceFileName (A->Obj, A->Pos.Name);
 125             const char* Message = GetString (A->Msg);
 126
 127             switch (A->Action) {
 128
 129                 case ASSERT_ACT_WARN:
 130                 case ASSERT_ACT_LDWARN:
 131                     Warning ("%s(%lu): %s", Module, A->Pos.Line, Message);
 132                     break;
 133
 134                 case ASSERT_ACT_ERROR:
 135                 case ASSERT_ACT_LDERROR:
 136                     Error ("%s(%lu): %s", Module, A->Pos.Line, Message);
 137                     break;
 138
 139                 default:
 140                     Internal ("Invalid assertion action (%u) in module `%s', "
 141                               "line %lu (file corrupt?)",
 142                               A->Action, Module, A->Pos.Line);
 143                     break;
 144             }
 145         }
 146     }
 147 }
 148
 149
 150