| 1 | /* $Id: kFileInterfaces.cpp,v 1.1 2002-02-24 02:47:25 bird Exp $
|
|---|
| 2 | *
|
|---|
| 3 | * kFileInterface.cpp - Interface helpers and workers.
|
|---|
| 4 | *
|
|---|
| 5 | * I've decided that this is the logical place to put many
|
|---|
| 6 | * of those generic worker/helper methods which works on
|
|---|
| 7 | * or with the interfaces. In java this would be impossible
|
|---|
| 8 | * using the real interfaces, but in C++ when we use empty
|
|---|
| 9 | * classes it very possible and quite helpful.
|
|---|
| 10 | *
|
|---|
| 11 | * Copyright (c) 2001 knut st. osmundsen (kosmunds@csc.com)
|
|---|
| 12 | *
|
|---|
| 13 | * Project Odin Software License can be found in LICENSE.TXT
|
|---|
| 14 | *
|
|---|
| 15 | */
|
|---|
| 16 |
|
|---|
| 17 |
|
|---|
| 18 | /*******************************************************************************
|
|---|
| 19 | * Header Files *
|
|---|
| 20 | *******************************************************************************/
|
|---|
| 21 | #include <malloc.h>
|
|---|
| 22 |
|
|---|
| 23 | #include "kTypes.h"
|
|---|
| 24 | #include "kError.h"
|
|---|
| 25 | #include "kFileInterfaces.h"
|
|---|
| 26 |
|
|---|
| 27 |
|
|---|
| 28 |
|
|---|
| 29 | /*******************************************************************************
|
|---|
| 30 | * Structures and Typedefs *
|
|---|
| 31 | *******************************************************************************/
|
|---|
| 32 | /**
|
|---|
| 33 | * XRef status and search info.
|
|---|
| 34 | * kRelocEntry::pv2 points to this structure.
|
|---|
| 35 | */
|
|---|
| 36 | typedef struct _XRefState
|
|---|
| 37 | {
|
|---|
| 38 | /* Position we wanna find references to. */
|
|---|
| 39 | unsigned long ulSegment;
|
|---|
| 40 | unsigned long offSegment;
|
|---|
| 41 | } XREFSTATE, *PXREFSTATE;
|
|---|
| 42 |
|
|---|
| 43 |
|
|---|
| 44 |
|
|---|
| 45 | /**
|
|---|
| 46 | * Finds the first reference to a location in the image.
|
|---|
| 47 | *
|
|---|
| 48 | * @returns Success indicator.
|
|---|
| 49 | * TRUE if found anything.
|
|---|
| 50 | * FALSE if nothing
|
|---|
| 51 | * @param ulSegment Segment number (0-based).
|
|---|
| 52 | * Special segment numbers are not supported.
|
|---|
| 53 | * @param offSegment Offset into the segement (ulSegment).
|
|---|
| 54 | * @param preloc The enumeration 'handle.'
|
|---|
| 55 | * @status implemented.
|
|---|
| 56 | * @author knut st. osmundsen (kosmunds@csc.com)
|
|---|
| 57 | * @remark No special segment numbers are supported.
|
|---|
| 58 | */
|
|---|
| 59 | KBOOL kRelocI::relocXRefFindFirst(unsigned long ulSegment, unsigned long offSegment, kRelocEntry *preloc)
|
|---|
| 60 | {
|
|---|
| 61 | kASSERT(preloc);
|
|---|
| 62 | kASSERT(ulSegment < kRelocEntry::enmFirstSelector);
|
|---|
| 63 |
|
|---|
| 64 | /*
|
|---|
| 65 | * Save the target we are searching for references to.
|
|---|
| 66 | */
|
|---|
| 67 | PXREFSTATE pState = (PXREFSTATE)malloc(sizeof(XREFSTATE));
|
|---|
| 68 | pState->ulSegment = ulSegment;
|
|---|
| 69 | pState->offSegment = offSegment;
|
|---|
| 70 | preloc->pv2 = (void*)pState;
|
|---|
| 71 |
|
|---|
| 72 | /*
|
|---|
| 73 | * Start searching.
|
|---|
| 74 | */
|
|---|
| 75 | if (relocFindFirst(0, 0, preloc))
|
|---|
| 76 | {
|
|---|
| 77 | kASSERT(ulSegment < kRelocEntry::enmFirstSelector);
|
|---|
| 78 | if ( preloc->isInternal()
|
|---|
| 79 | && preloc->Info.Internal.ulSegment == ulSegment
|
|---|
| 80 | && preloc->Info.Internal.offSegment == offSegment
|
|---|
| 81 | )
|
|---|
| 82 | return TRUE;
|
|---|
| 83 |
|
|---|
| 84 | KBOOL fRc = relocXRefFindNext(preloc);
|
|---|
| 85 | if (!fRc)
|
|---|
| 86 | relocXRefFindClose(preloc);
|
|---|
| 87 | return fRc;
|
|---|
| 88 | }
|
|---|
| 89 |
|
|---|
| 90 | return FALSE;
|
|---|
| 91 | }
|
|---|
| 92 |
|
|---|
| 93 |
|
|---|
| 94 | /**
|
|---|
| 95 | * Finds the next reference to the address.
|
|---|
| 96 | * @returns Success indicator.
|
|---|
| 97 | * Returns FALSE if no more matches.
|
|---|
| 98 | * @param preloc The enumeration 'handle.'
|
|---|
| 99 | * This must be initiated by a call to relocXRefFindFirst.
|
|---|
| 100 | * @status implemented.
|
|---|
| 101 | * @author knut st. osmundsen (kosmunds@csc.com)
|
|---|
| 102 | */
|
|---|
| 103 | KBOOL kRelocI::relocXRefFindNext(kRelocEntry *preloc)
|
|---|
| 104 | {
|
|---|
| 105 | kASSERT(preloc->pv2 != NULL);
|
|---|
| 106 |
|
|---|
| 107 | while (relocFindNext(preloc))
|
|---|
| 108 | {
|
|---|
| 109 | kASSERT(preloc->ulSegment < kRelocEntry::enmFirstSelector);
|
|---|
| 110 | if ( preloc->isInternal()
|
|---|
| 111 | && preloc->Info.Internal.ulSegment == ((PXREFSTATE)preloc->pv2)->ulSegment
|
|---|
| 112 | && preloc->Info.Internal.offSegment == ((PXREFSTATE)preloc->pv2)->offSegment
|
|---|
| 113 | )
|
|---|
| 114 | return TRUE;
|
|---|
| 115 | }
|
|---|
| 116 |
|
|---|
| 117 | return FALSE;
|
|---|
| 118 | }
|
|---|
| 119 |
|
|---|
| 120 |
|
|---|
| 121 | /**
|
|---|
| 122 | * Closes a find session - this function *must* be called to
|
|---|
| 123 | * clean up resources used internally.
|
|---|
| 124 | *
|
|---|
| 125 | * @param preloc The enumeration 'handle.'
|
|---|
| 126 | * This must be initiated by a call to relocXRefFindFirst.
|
|---|
| 127 | * @status implemented.
|
|---|
| 128 | * @author knut st. osmundsen (kosmunds@csc.com)
|
|---|
| 129 | * @remark
|
|---|
| 130 | */
|
|---|
| 131 | void kRelocI::relocXRefFindClose(kRelocEntry *preloc)
|
|---|
| 132 | {
|
|---|
| 133 | kASSERT(preloc != NULL);
|
|---|
| 134 | relocFindClose(preloc);
|
|---|
| 135 | free(preloc->pv2);
|
|---|
| 136 | preloc->pv2 = NULL;
|
|---|
| 137 | }
|
|---|
| 138 |
|
|---|
