#include "cmdline.h"

// Fork Attributes
enum {
    mapReadOnly = 0x80,
    mapCompact = 0x40,
    mapChanged = 0x20
};

// Resources
enum {
    resSysHeap = 0x40,
    resPurgeable = 0x20,
    resLocked = 0x10,
    resProtected = 8,
    resPreload = 4,
    resChanged = 2
};

#ifdef	__MWERKS__
#pragma options align=mac68k
#endif
typedef struct {
    char sysdata[66];
    char type[4];
    char creator[4];
    char sysdata2[38];
    char appdata[128];
} MemRsrcSysData; // assumed name

typedef struct { // Resource Header
    UInt32 data_offs;
    UInt32 map_offs;
    UInt32 data_len;
    UInt32 map_len;
} Ty70;
typedef struct { // Resource Map
    Ty70 mem_hdr;
    Handle mem_next_map_handle; // fixme for 64-bit probably
    SInt16 mem_refnum;
    UInt16 fork_attr;
    UInt16 typelist_offs;
    UInt16 namelist_offs;
    UInt16 types_idx;
} Ty73;
typedef struct { // Resource Type List Item
    OSType type;
    UInt16 rsrc_idx;
    UInt16 ref_list_offs;
} Ty75;
typedef struct { // Reference List Item
    UInt16 id;
    UInt16 name_offs;
    unsigned char attr;
    unsigned char data_offs[3];
    Handle mem_rsrc_handle;
} Ty77;
typedef struct { // Name List Item
    unsigned char len;
} Ty80;
typedef struct { // Resource
    UInt32 len;
} Ty82;
#ifdef	__MWERKS__
#pragma options align=reset
#endif

typedef struct MemRefList {
    UInt16 id;
    OSType type;
    StringPtr name;
    unsigned char attr;
    Handle hand;
    struct MemRefList *next;
} MemRefList;

typedef struct MemRsrcTypeList {
    OSType type;
    MemRefList *ref_list;
    struct MemRsrcTypeList *next;
} MemRsrcTypeList;

typedef struct MemRsrcMap {
    SInt16 refnum;
    UInt16 fork_attr;
    MemRsrcTypeList *type_list;
    MemRsrcSysData sys_data;
    struct MemRsrcMap *prev;
} MemRsrcMap;

typedef struct ResRef {
    OSSpec spec;
    int ref;
    struct ResRef *next;
} ResRef;

static OSErr resError;
static SInt16 cur_res_file;
Boolean ResLoad;
static MemRsrcMap *maplist;
static ResRef *resForkList;
static ResRef *resForkLast;
static Boolean UseResourceForkInfo;

// Forward declarations
static void ReadResourceFork(SInt16 ref, SInt8 permission, void *file_data, SInt32 file_size);

Boolean OS_UsingMacResourceForkInfo(void) {
    return UseResourceForkInfo;
}

void OS_UseMacResourceForkInfo(Boolean which) {
    UseResourceForkInfo = which;
}

OSErr SystemInitResources(OSSpec *spec) {
    FSSpec prog;
    void *file_data;
    SInt32 file_len;

    maplist = 0;
    cur_res_file = 0;

    if (!OS_LoadMacResourceFork(spec, &file_data, &file_len)) {
        ReadResourceFork(-1, 1, file_data, file_len);
        cur_res_file = -1;
        resError = noErr;
        return noErr;
    } else {
        if (!OS_OSSpec_To_FSSpec(spec, &prog) && !FSpOpenResFile(&prog, 1)) {
            resError = noErr;
            return noErr;
        } else {
            resError = fnfErr;
            return fnfErr;
        }
    }
}

static MemRsrcMap *NewResourceMap(SInt16 ref, UInt16 attr, MemRsrcTypeList *list, void *unk) {
    MemRsrcMap **scan;
    MemRsrcMap *nw;

    scan = &maplist;
    nw = malloc(sizeof(MemRsrcMap));

    if (!nw) {
        resError = memFullErr;
        return 0;
    }

    nw->refnum = ref;
    nw->fork_attr = attr;
    nw->type_list = list;
    nw->prev = *scan;
    *scan = nw;
    return nw;
}

static MemRsrcTypeList *NewTypeListEntry(MemRsrcTypeList **scan, OSType type, MemRefList *list, MemRsrcTypeList *next) {
    MemRsrcTypeList *nw;

    while (*scan)
        scan = &(*scan)->next;

    nw = malloc(sizeof(MemRsrcTypeList));
    if (!nw) {
        resError = memFullErr;
        return 0;
    }

    nw->type = type;
    nw->ref_list = list;
    nw->next = next;
    *scan = nw;
    return nw;
}

static MemRefList *NewRefListEntry(MemRefList **scan, UInt16 id, OSType type, StringPtr name, unsigned char attr, Handle hand) {
    MemRefList *prev;
    MemRefList *nw;
    char mname[256];

    prev = 0;
    if (name)
        p2cstrcpy(mname, name);
    else
        strcpy(mname, "(none)");

    while (*scan && (*scan)->id != id) {
        prev = *scan;
        scan = &(*scan)->next;
    }

    nw = malloc(sizeof(MemRefList));
    if (!nw) {
        resError = memFullErr;
        return 0;
    }

    nw->id = id;
    nw->type = type;
    nw->name = name;
    nw->attr = attr;
    nw->hand = hand;
    if (prev) {
        nw->next = prev->next;
        prev->next = nw;
    } else {
        nw->next = 0;
    }
    *scan = nw;
    return nw;
}

static MemRsrcMap *FindResourceMap(SInt16 ref) {
    MemRsrcMap *list = maplist;

    while (list) {
        if (list->refnum == ref)
            return list;
        list = list->prev;
    }

    return 0;
}

static MemRsrcMap *FindResourceMap2(SInt16 ref, MemRsrcMap **next) {
    MemRsrcMap *list = maplist;

    *next = 0;
    while (list) {
        if (list->refnum == ref)
            return list;
        *next = list;
        list = list->prev;
    }

    return 0;
}

static void DeleteResources(SInt16 refNum) {
    MemRsrcMap *rm, *rmnext;
    MemRsrcTypeList *mtyptmp, *mtyp;
    MemRefList *mrletmp, *mrle;

    rm = FindResourceMap2(refNum, &rmnext);
    if (rm) {
        mtyp = rm->type_list;
        while (mtyp) {
            mrle = mtyp->ref_list;
            while (mrle) {
                if (mrle->hand)
                    DisposeHandle(mrle->hand);
                if (mrle->name)
                    free(mrle->name);
                mrletmp = mrle;
                mrle = mrle->next;
                free(mrletmp);
            }
            mtyptmp = mtyp;
            mtyp = mtyp->next;
            free(mtyptmp);
        }

        if (rmnext)
            rmnext->prev = rm->prev;
        else
            maplist = rm->prev;
        free(rm);
    }
}

#define RF_READ(buf, offset, count, failBranch) \
do { \
SInt32 __offs = (offset);                          \
if (!file_data) {    \
if ((resError = SetFPos(ref, fsFromStart, __offs)) != noErr) goto failBranch;    \
if ((resError = FSRead(ref, (SInt32 *) &(count), buf)) != noErr) goto failBranch;    \
} else {                     \
if ((__offs + (count)) > file_size) goto failBranch; \
memcpy(buf, ((unsigned char *) file_data) + __offs, (count));   \
}                                               \
} while(0)

static void ReadResourceFork(SInt16 ref, SInt8 permission, void *file_data, SInt32 file_size) {
    // this function has various awkwardly swapped registers
    MemRsrcMap *rm;
    Ty70 thdr;
    Ty70 *dhdr;
    MemRsrcSysData tsys;
    MemRsrcSysData *dsys;
    Ty73 *dmap;
    Ty75 *dtyp;
    Ty77 *drle;
    Ty80 *dnam;
    void *buffer;
    SInt32 msize;
    SInt32 cnt;
    SInt32 ref_offs;
    int rcnt;
    MemRsrcTypeList *mtyp;
    Ty82 tent;
    SInt32 esize;
    SInt32 offs;
    Handle hand;
    unsigned char *name;
    unsigned char *nameptr;

    if (!file_data) {
        if ((resError = GetEOF(ref, &file_size)) != noErr)
            goto mapFail;
    }

    if (file_size < 90)
        goto mapFail;

    cnt = sizeof(Ty70);
    RF_READ(&thdr, 0, cnt, mapFail);
    dhdr = &thdr;

    ref_offs = cnt;
    cnt = ((thdr.map_offs < thdr.data_offs) ? thdr.map_offs : thdr.data_offs) - sizeof(Ty70);
    if (cnt > sizeof(MemRsrcSysData))
        cnt = sizeof(MemRsrcSysData);
    RF_READ(&tsys, ref_offs, cnt, mapFail);
    dsys = &tsys;

    msize = dhdr->map_len;
    buffer = malloc(msize);
    if (!buffer)
        goto memFail;

    ref_offs = dhdr->map_offs;
    RF_READ(buffer, ref_offs, msize, mapFail);

    if (
            (dhdr->map_offs > file_size)
            || ((dhdr->map_offs + dhdr->map_len) > file_size)
            || (dhdr->data_offs > file_size)
            || ((dhdr->data_offs + dhdr->data_len) > file_size)
            || ((dhdr->map_offs < dhdr->data_offs) ? ((dhdr->map_offs + dhdr->map_len) > dhdr->data_offs) : ((dhdr->data_offs + dhdr->data_len) > dhdr->map_offs))
            )
        goto mapFail;

    rm = NewResourceMap(ref, ((permission == 1) ? mapReadOnly : 0) | mapCompact, 0, 0);
    if (!rm)
        goto memFail;

    rm->sys_data = *dsys;

    dmap = (Ty73 *) buffer;
    if ((dmap->typelist_offs + dhdr->map_offs) > file_size)
        goto freeAndMapFail;
    dtyp = (Ty75 *) (((unsigned char *) buffer) + dmap->typelist_offs + 2);
    if ((dmap->namelist_offs + dhdr->map_offs) > file_size)
        goto freeAndMapFail;
    dnam = (Ty80 *) (((unsigned char *) buffer) + dmap->namelist_offs);
    if (dmap->types_idx != 0xFFFF) {
        for (cnt = 0; cnt <= dmap->types_idx; cnt++) {
            mtyp = NewTypeListEntry(&rm->type_list, dtyp[cnt].type, 0, 0);
            if (!mtyp)
                goto freeAndReturn;

            if ((dmap->typelist_offs + dtyp[cnt].ref_list_offs + dhdr->map_offs) > file_size)
                goto freeAndMapFail;

            drle = (Ty77 *) (((unsigned char *) dtyp) + dtyp[cnt].ref_list_offs - 2);
            if (dtyp[cnt].rsrc_idx != 0xFFFF) {
                for (rcnt = 0; rcnt <= dtyp[cnt].rsrc_idx; rcnt++) {
                    ref_offs = (drle[rcnt].data_offs[0] << 16) | (drle[rcnt].data_offs[1] << 8) | drle[rcnt].data_offs[2];
                    offs = ref_offs + dhdr->data_offs;
                    if (offs > file_size)
                        goto freeAndMapFail;
                    esize = 4;
                    RF_READ(&tent, offs, esize, freeAndMapFail);

                    offs += esize;
                    if ((tent.len + ref_offs + dhdr->data_offs) > file_size)
                        goto freeAndMapFail;

                    hand = NewHandle(tent.len);
                    if (!hand)
                        goto freeAndMapFail;

                    HLock(hand);
                    RF_READ(*hand, offs, tent.len, freeAndMapFail);
                    HUnlock(hand);

                    if (drle[rcnt].name_offs != 0xFFFF) {
                        nameptr = (StringPtr) dnam + drle[rcnt].name_offs;
                        name = malloc(nameptr[0] + 1);
                        memcpy(name, nameptr, nameptr[0] + 1);
                    } else {
                        name = 0;
                    }

                    if (!NewRefListEntry(&mtyp->ref_list, drle[rcnt].id, dtyp[cnt].type, name, drle[rcnt].attr, hand))
                        goto freeAndReturn;
                }
            }
        }
    }

    free(buffer);
    resError = noErr;
    return;
freeAndMapFail:
    resError = mapReadErr;
freeAndReturn:
    DeleteResources(ref);
    if (buffer)
        free(buffer);
    return;
memFail:
    resError = memFullErr;
    return;
mapFail:
    resError = mapReadErr;
}

static void GetResourceSizes(MemRsrcMap *rm, SInt32 *data_size, SInt32 *name_size, SInt32 *reflist_size, SInt32 *typelist_size) {
    MemRsrcTypeList *mtyp;
    MemRefList *mrle;

    *data_size = *name_size = *reflist_size = *typelist_size = 0;

    mtyp = rm->type_list;
    while (mtyp) {
        mrle = mtyp->ref_list;
        while (mrle) {
            *name_size += !mrle->name ? 0 : (mrle->name[0] + 1);
            *data_size += (!mrle->hand ? 0 : GetHandleSize(mrle->hand)) + 4;
            *reflist_size += 12;
            mrle = mrle->next;
        }
        *typelist_size += 8;
        mtyp = mtyp->next;
    }
}

static SInt32 GetResourceTypesCount(MemRsrcMap *dm) {
    SInt32 tmp;
    MemRsrcTypeList *mtyp;

    tmp = 0;
    mtyp = dm->type_list;
    while (mtyp) {
        mtyp = mtyp->next;
        ++tmp;
    }

    return tmp;
}

static SInt32 GetResourceEntriesCount(MemRsrcTypeList *mtyp) {
    SInt32 tmp;
    MemRefList *mrle;

    tmp = 0;
    mrle = mtyp->ref_list;
    while (mrle) {
        mrle = mrle->next;
        ++tmp;
    }

    return tmp;
}

#define RF_HANDLE_INSERT(hand, what, offset, size) \
do {                                               \
SInt32 __offs = (offset);                          \
SInt32 __len = (size);                             \
if ((SInt32) (__offs + __len) > GetHandleSize(hand)) { \
resError = mapReadErr;                     \
return;                                    \
} else {                                   \
memcpy(*hand + __offs, (what), __len);  \
}                                          \
}                                          \
while (0)

static void WriteResourceFork(SInt16 ref) {
    MemRsrcMap *rm;
    Ty70 dhdr;
    Ty70 thdr;
    MemRsrcSysData tsys;
    Ty73 dmap;
    Ty73 tmap;
    Handle hand_ref;
    SInt32 reflist_size, typelist_size;
    SInt32 name_size, data_size;
    SInt32 reflist_offs, typelist_offs;
    SInt32 name_offs, data_offs;
    MemRsrcTypeList *mtyp;
    Ty75 dtyp;
    Ty75 ttyp;
    MemRefList *mrle;
    Ty77 drle;
    Ty77 trle;
    Ty82 dent;
    Ty82 tent;
    SInt32 sz;

    rm = FindResourceMap(ref);
    if (!rm) {
        resError = resFNotFound;
        return;
    }

    if (rm->refnum == -1) {
        resError = resFNotFound;
        return;
    }

    if (rm->fork_attr & mapReadOnly) {
        resError = resAttrErr;
        return;
    }

    if (!(rm->fork_attr & mapChanged)) {
        return;
    }

    GetResourceSizes(rm, &data_size, &name_size, &reflist_size, &typelist_size);
    dhdr.data_offs = sizeof(dhdr) + sizeof(tsys);
    dhdr.data_len = data_size;
    dhdr.map_offs = sizeof(dhdr) + sizeof(tsys) + data_size;
    dhdr.map_len = name_size + reflist_size + typelist_size + sizeof(dmap);

    hand_ref = NewHandle(dhdr.map_offs + dhdr.map_len);
    if (!hand_ref) {
        resError = MemError();
        return;
    }

    HLock(hand_ref);
    memset(*hand_ref, 0, dhdr.map_offs + dhdr.map_len);
    thdr = dhdr;
    // This is where it would be endian-swapped i guess
    RF_HANDLE_INSERT(hand_ref, &thdr, 0, sizeof(thdr));

    tsys = rm->sys_data;
    RF_HANDLE_INSERT(hand_ref, &tsys, sizeof(thdr), sizeof(tsys));

    dmap.mem_hdr = thdr;
    dmap.mem_next_map_handle = 0;
    dmap.mem_refnum = 0;
    dmap.fork_attr = rm->fork_attr & ~resChanged; // bug! should be mapChanged
    dmap.typelist_offs = sizeof(dmap) - 2;
    dmap.namelist_offs = typelist_size + reflist_size + sizeof(dmap);
    dmap.types_idx = GetResourceTypesCount(rm) - 1;
    tmap = dmap;
    RF_HANDLE_INSERT(hand_ref, &tmap, dhdr.map_offs, sizeof(tmap));

    // Now write the actual shit
    name_offs = 0;
    data_offs = 0;
    reflist_offs = 0;
    typelist_offs = 0;
    mtyp = rm->type_list;
    while (mtyp) {
        dtyp.type = mtyp->type;
        dtyp.rsrc_idx = GetResourceEntriesCount(mtyp) - 1;
        dtyp.ref_list_offs = typelist_size + reflist_offs + 2;
        ttyp = dtyp;
        RF_HANDLE_INSERT(hand_ref, &ttyp, (dhdr.map_offs + dmap.typelist_offs + 2) + typelist_offs, sizeof(ttyp));

        mrle = mtyp->ref_list;
        while (mrle) {
#line 943
            OPTION_ASSERT(reflist_offs < dmap.namelist_offs);

            drle.id = mrle->id;
            drle.name_offs = (mrle->name) ? name_offs : -1;
            drle.attr = mrle->attr & ~resChanged;
            drle.data_offs[0] = (data_offs & 0xFF0000) >> 16;
            drle.data_offs[1] = (data_offs & 0x00FF00) >> 8;
            drle.data_offs[2] = (data_offs & 0x0000FF);
            drle.mem_rsrc_handle = 0;
            trle = drle;
            RF_HANDLE_INSERT(hand_ref, &trle, (dhdr.map_offs + dmap.typelist_offs + 2) + typelist_size + reflist_offs, sizeof(trle));

            reflist_offs += sizeof(trle);
            if (mrle->name) {
#line 962
                if (dhdr.map_offs < dhdr.data_offs)
                    OPTION_ASSERT(name_offs + dmap.namelist_offs + dhdr.map_offs < dhdr.data_offs);
                RF_HANDLE_INSERT(hand_ref, mrle->name, dhdr.map_offs + dmap.namelist_offs + drle.name_offs, mrle->name[0] + 1);
                name_offs += mrle->name[0] + 1;
            }

#line 970
            OPTION_ASSERT(data_offs < dhdr.data_len);
            OPTION_ASSERT(mrle->hand!=NULL);
            if (dhdr.map_offs > dhdr.data_offs)
                OPTION_ASSERT(data_offs + dhdr.data_offs < dhdr.map_offs);

            HLock(mrle->hand);
            dent.len = GetHandleSize(mrle->hand);
            tent = dent;
            RF_HANDLE_INSERT(hand_ref, &tent, dhdr.data_offs + data_offs, sizeof(tent));
            data_offs += sizeof(tent);
            RF_HANDLE_INSERT(hand_ref, *mrle->hand, dhdr.data_offs + data_offs, dent.len);
            data_offs += dent.len;
            HUnlock(mrle->hand);

            mrle = mrle->next;
        }

        mtyp = mtyp->next;
        typelist_offs += sizeof(ttyp);
    }

    sz = GetHandleSize(hand_ref);
    if ((resError = SetFPos(ref, fsFromStart, 0)) != noErr)
        return;
    if ((resError = SetEOF(ref, sz)) != noErr)
        return;
    if ((resError = FSWrite(ref, &sz, *hand_ref)) != noErr)
        return;
    HUnlock(hand_ref);
    DisposeHandle(hand_ref);
}

static void WriteEmptyResourceFork(SInt16 ref) {
    Ty70 dhdr;
    MemRsrcSysData dsys;
    Ty73 dmap;
    Handle hand_ref;
    SInt32 sz;

    dhdr.map_offs = sizeof(dhdr) + sizeof(dsys);
    dhdr.map_len = sizeof(dmap);
    dhdr.data_offs = sizeof(dhdr) + sizeof(dsys) + sizeof(dmap);
    dhdr.data_len = 0;

    memset(&dsys, 0, sizeof(dsys));
    memset(&dsys.creator, 0, sizeof(dsys.creator));
    memset(&dsys.type, 0, sizeof(dsys.type));

    dmap.mem_hdr = dhdr;
    dmap.mem_next_map_handle = 0;
    dmap.mem_refnum = 0;
    dmap.fork_attr = 0;
    dmap.typelist_offs = sizeof(dmap) - 2;
    dmap.namelist_offs = sizeof(dmap) - 2;
    dmap.types_idx = 0xFFFF;

    hand_ref = NewHandle(sizeof(dhdr) + sizeof(dsys) + sizeof(dmap));
    if (!hand_ref) {
        resError = MemError();
        return;
    }

    HLock(hand_ref);
    memset(*hand_ref, 0, sizeof(dhdr) + sizeof(dsys) + sizeof(dmap));
    RF_HANDLE_INSERT(hand_ref, &dhdr, 0, sizeof(dhdr));
    RF_HANDLE_INSERT(hand_ref, &dsys, sizeof(dhdr), sizeof(dsys));
    RF_HANDLE_INSERT(hand_ref, &dmap, sizeof(dhdr) + sizeof(dsys), sizeof(dmap));

    sz = GetHandleSize(hand_ref);
    if ((resError = SetFPos(ref, fsFromStart, 0)) != noErr)
        return;
    if ((resError = SetEOF(ref, sz)) != noErr)
        return;
    if ((resError = FSWrite(ref, &sz, *hand_ref)) != noErr)
        return;
    HUnlock(hand_ref);
    DisposeHandle(hand_ref);
}

static MemRsrcTypeList *FindResourceType1(MemRsrcMap *rm, OSType theType) {
    MemRsrcTypeList *mtyp;

    mtyp = rm->type_list;
    while (mtyp) {
        if (mtyp->type == theType)
            return mtyp;
        mtyp = mtyp->next;
    }

    return 0;
}

static SInt32 CountResourceType1(MemRsrcMap *rm, OSType theType) {
    MemRsrcTypeList *mtyp;

    mtyp = rm->type_list;
    while (mtyp) {
        if (mtyp->type == theType)
            return GetResourceEntriesCount(mtyp);
        mtyp = mtyp->next;
    }

    return 0;
}

static SInt32 CountResourceType(OSType theType) {
    MemRsrcMap *rm;
    SInt32 total;

    total = 0;
    rm = FindResourceMap(cur_res_file);

    while (rm) {
        total += CountResourceType1(rm, theType);
        rm = rm->prev;
    }

    return total;
}

static MemRefList *FindIndResource1(MemRsrcMap *rm, OSType theType, SInt16 index) {
    MemRsrcTypeList *mtyp;
    MemRefList *mrle;

    mtyp = rm->type_list;
    while (mtyp) {
        if (mtyp->type == theType) {
            mrle = mtyp->ref_list;
            while (mrle && --index > 0) {
                mrle = mrle->next;
            }
            return mrle;
        }
        mtyp = mtyp->next;
    }

    return 0;
}

static MemRefList *FindIndResource(OSType theType, SInt16 index) {
    MemRsrcMap *rm = FindResourceMap(cur_res_file);
    MemRefList *mrle;

    while (rm) {
        mrle = FindIndResource1(rm, theType, index);
        if (mrle)
            return mrle;
        rm = rm->prev;
    }

    return 0;
}

static MemRefList *FindResourceTypeAndID1(MemRsrcMap *rm, OSType theType, SInt16 theID) {
    MemRsrcTypeList *mtyp = FindResourceType1(rm, theType);
    MemRefList *mref;

    if (mtyp) {
        mref = mtyp->ref_list;
        while (mref) {
            if (mref->id == theID)
                return mref;
            mref = mref->next;
        }
    }

    return 0;
}

static MemRefList *FindResourceTypeAndID(OSType theType, SInt16 theID) {
    MemRsrcMap *rm = FindResourceMap(cur_res_file);
    MemRefList *mref;

    while (rm) {
        mref = FindResourceTypeAndID1(rm, theType, theID);
        if (mref)
            return mref;
        rm = rm->prev;
    }

    return 0;
}

static MemRefList *FindResourceTypeAndName1(MemRsrcMap *rm, OSType theType, ConstStringPtr theName) {
    MemRsrcTypeList *mtyp;
    MemRefList *mref;

    mtyp = FindResourceType1(rm, theType);
    if (mtyp) {
        mref = mtyp->ref_list;
        while (mref) {
            if (mref->name && EqualString(mref->name, theName, 0, 0))
                return mref;
            mref = mref->next;
        }
    }

    return 0;
}

static MemRefList *FindResourceTypeAndName(OSType theType, ConstStringPtr theName) {
    MemRsrcMap *rm = FindResourceMap(cur_res_file);
    MemRefList *mref;

    while (rm) {
        mref = FindResourceTypeAndName1(rm, theType, theName);
        if (mref)
            return mref;
        rm = rm->prev;
    }

    return 0;
}

static MemRefList *FindResourceHandle1(MemRsrcMap *rm, Handle theResource) {
    MemRsrcTypeList *mtyp;
    MemRefList *mrle;

    for (mtyp = rm->type_list; mtyp; mtyp = mtyp->next) {
        for (mrle = mtyp->ref_list; mrle; mrle = mrle->next) {
            if (mrle->hand == theResource)
                return mrle;
        }
    }

    return 0;
}

static MemRefList *FindResourceHandle(Handle theResource) {
    MemRsrcMap *rm;
    MemRefList *mrle;

    for (rm = FindResourceMap(cur_res_file); rm; rm = rm->prev) {
        mrle = FindResourceHandle1(rm, theResource);
        if (mrle)
            return mrle;
    }

    return 0;
}

static int RemoveResourceHandle1(MemRsrcMap *rm, Handle theResource) {
    MemRsrcTypeList *mtyp, *pmtyp;
    MemRefList *mrle, *pmrle;

    mtyp = rm->type_list;
    pmtyp = 0;
    while (mtyp) {
        mrle = mtyp->ref_list;
        pmrle = 0;
        while (mrle) {
            if (mrle->hand == theResource) {
                if (pmrle)
                    pmrle->next = mrle->next;
                else
                    mtyp->ref_list = mrle->next;
                free(mrle);

                if (!mtyp->ref_list) {
                    if (pmtyp)
                        pmtyp->next = mtyp->next;
                    else
                        rm->type_list = mtyp->next;
                    free(mtyp);
                }

                return 1;
            }

            pmrle = mrle;
            mrle = mrle->next;
        }
        pmtyp = mtyp;
        mtyp = mtyp->next;
    }

    return 0;
}

static int RemoveResourceHandle(Handle theResource) {
    MemRsrcMap *rm;

    for (rm = FindResourceMap(cur_res_file); rm; rm = rm->prev) {
        if (RemoveResourceHandle1(rm, theResource))
            return 1;
    }

    return 0;
}

static SInt16 FindResourceHandleFile1(MemRsrcMap *rm, Handle theResource) {
    MemRsrcTypeList *mtyp;
    MemRefList *mrle;

    for (mtyp = rm->type_list; mtyp; mtyp = mtyp->next) {
        for (mrle = mtyp->ref_list; mrle; mrle = mrle->next) {
            if (mrle->hand == theResource)
                return rm->refnum;
        }
    }

    return -1;
}

static SInt16 FindResourceHandleFile(Handle theResource) {
    MemRsrcMap *rm;
    MemRefList *mrle;

    for (rm = FindResourceMap(cur_res_file); rm; rm = rm->prev) {
        mrle = FindResourceHandle1(rm, theResource);
        if (mrle)
            return rm->refnum;
    }

    return -1;
}

void OS_AddMacResourceForkRef(int ref, const OSSpec *spec) {
    ResRef *nw;

    nw = malloc(sizeof(ResRef));
    if (nw) {
        nw->spec = *spec;
        nw->ref = ref;
        nw->next = 0;
        if (resForkLast)
            resForkLast->next = nw;
        else
            resForkList = nw;
        resForkLast = nw;
    }
}

void OS_RemoveMacResourceForkRef(int ref) {
    ResRef *lst;
    ResRef *prev;

    lst = resForkList;
    prev = 0;
    while (lst && lst->ref != ref) {
        prev = lst;
        lst = lst->next;
    }

    if (lst) {
        if (prev) {
            prev->next = lst->next;
            if (!prev->next)
                resForkLast = prev;
        } else {
            resForkList = lst->next;
            if (!resForkList)
                resForkLast = 0;
        }
        free(lst);
    }
}

OSSpec *OS_GetMacResourceForkFromRef(int ref) {
    ResRef *lst;

    for (lst = resForkList; lst; lst = lst->next) {
        if (lst->ref == ref)
            return &lst->spec;
    }

    return 0;
}

Boolean OS_SearchMacResourceForkList(const OSSpec *rspec, int *ref) {
    ResRef *lst;

    for (lst = resForkList; lst; lst = lst->next) {
        if (OS_EqualSpec(&lst->spec, rspec)) {
            *ref = lst->ref;
            return 1;
        }
    }

    return 0;
}

int OS_SetMacResourceForkCreatorAndType(int ref, OSType creator, OSType type) {
    int err;
    UInt32 buf[2];
    UInt32 sz;
    MemRsrcMap *rm;

    if (!OS_GetMacResourceForkFromRef(ref)) {
        sz = 8;
        buf[0] = type;
        buf[1] = creator;
        err = OS_Seek(ref, OSSeekAbs, 0x52);
        if (!err) {
            err = OS_Write(ref, buf, &sz);
            if (!err && sz == 8) {
                err = 0;
            }
        }
    } else {
        rm = FindResourceMap(OS_RefToMac(ref));
        if (!rm) {
            err = 2;
        } else if (rm->fork_attr & mapReadOnly) {
            err = 13;
        } else {
            rm->sys_data.creator[0] = (creator & 0xFF000000) >> 24;
            rm->sys_data.creator[1] = (creator & 0x00FF0000) >> 16;
            rm->sys_data.creator[2] = (creator & 0x0000FF00) >> 8;
            rm->sys_data.creator[3] = (creator & 0x000000FF);
            rm->sys_data.type[0] = (type & 0xFF000000) >> 24;
            rm->sys_data.type[1] = (type & 0x00FF0000) >> 16;
            rm->sys_data.type[2] = (type & 0x0000FF00) >> 8;
            rm->sys_data.type[3] = (type & 0x000000FF);
            rm->fork_attr |= mapChanged;
            err = 0;
        }
    }

    return err;
}

int OS_GetMacResourceForkCreatorAndType(int ref, OSType *creator, OSType *type) {
    int err;
    UInt32 buf[2];
    UInt32 sz;
    MemRsrcMap *rm;

    if (!OS_GetMacResourceForkFromRef(ref)) {
        sz = 8;
        err = OS_Seek(ref, OSSeekAbs, 0x52);
        if (!err) {
            err = OS_Read(ref, buf, &sz);
            if (!err && sz == 8) {
                err = 0;
                *type = buf[0];
                *creator = buf[1];
            }
        }
    } else {
        rm = FindResourceMap(OS_RefToMac(ref));
        if (!rm) {
            err = 2;
        } else {
            *creator = (rm->sys_data.creator[0] << 24) | (rm->sys_data.creator[1] << 16) | (rm->sys_data.creator[2] << 8) | rm->sys_data.creator[3];
            *type = (rm->sys_data.type[0] << 24) | (rm->sys_data.type[1] << 16) | (rm->sys_data.type[2] << 8) | rm->sys_data.type[3];
            err = 0;
        }
    }

    return err;
}

void OS_CleanupMacResourceForkDir(const OSPathSpec *dir) {
    OS_Rmdir(dir);
}

OSErr OS_MacDumpResourceFork(SInt16 ref, Boolean dumpContents) {
    MemRsrcMap *rm;
    MemRsrcTypeList *tl;
    MemRefList *rl;
    char name[256];
    unsigned char *ptr;
    SInt32 idx;
    SInt32 size;
    char safe[16];
    int spaces;

    rm = FindResourceMap(ref);
    if (!rm) {
        fprintf(stderr, "Could not find resource fork for ref = %d\n", ref);
        return fnfErr;
    }

    printf("Fork attributes = %04X\n", rm->fork_attr);
    printf("Creator = '%4.4s';  Type = '%4.4s'\n", rm->sys_data.creator, rm->sys_data.type);
    printf("Types:\n");

    for (tl = rm->type_list; tl; tl = tl->next) {
        printf("'%c%c%c%c':\n",
               (tl->type & 0xFF000000) >> 24,
               (tl->type & 0x00FF0000) >> 16,
               (tl->type & 0x0000FF00) >> 8,
               (tl->type & 0x000000FF)
               );
        for (rl = tl->ref_list; rl; rl = rl->next) {
            if (rl->type != tl->type)
                printf("!!! RefList type '%c%c%c%c' does not match TypeList type !!!\n",
                       (rl->type & 0xFF000000) >> 24,
                       (rl->type & 0x00FF0000) >> 16,
                       (rl->type & 0x0000FF00) >> 8,
                       (rl->type & 0x000000FF)
                       );

            if (rl->name)
                p2cstrcpy(name, rl->name);
            else
                strcpy(name, "<none>");

            printf("\tID = %d '%s'\n", rl->id, name);
            printf("\tAttributes: ");
            if (rl->attr & resSysHeap)
                printf("SysHeap ");
            if (rl->attr & resPurgeable)
                printf("Purgeable ");
            if (rl->attr & resLocked)
                printf("Locked ");
            if (rl->attr & resProtected)
                printf("Protected ");
            if (rl->attr & resPreload)
                printf("Preload ");
            if (rl->attr & resChanged)
                printf("Changed ");
            printf("\n");

            if (dumpContents) {
                size = GetHandleSize(rl->hand);
                HLock(rl->hand);
                ptr = (unsigned char *) *rl->hand;
                idx = 0;
                printf("Contents:");

                while (idx < size) {
                    if ((idx % 16) == 0) {
                        printf("\n%08X: ", idx);
                        memset(safe, ' ', 16);
                    }
                    printf("%02X ", ptr[idx]);
                    if (isprint(ptr[idx]))
                        safe[idx & 15] = ptr[idx];
                    else
                        safe[idx & 15] = '.';

                    if (((idx % 16) == 15) || (idx + 1) == size) {
                        spaces = (((idx & 15) + 15) & ~15) - (idx & 15);
                        while (spaces--)
                            printf("   ");
                        printf(" %16.16s", safe);
                    }

                    ++idx;
                }

                printf("\n");
            }
        }
    }

    printf("\n");
    CloseResFile(ref);
    return noErr;
}

OSErr FSpOpenRF(const FSSpec *fss, SInt8 permission, SInt16 *refNum) {
    OSErr err;
    int oserr;
    FSSpec rfss;
    OSSpec spec, rspec;
    Boolean create;

    create = (permission != fsRdPerm);
    oserr = OS_FSSpec_To_OSSpec(fss, &spec);
    if (oserr)
        return OS_MacError(oserr);

    oserr = OS_GetRsrcOSSpec(&spec, &rspec, create);
    if (oserr)
        return OS_MacError(oserr);

    oserr = OS_OSSpec_To_FSSpec(&rspec, &rfss);
    if (oserr)
        return OS_MacError(oserr);

    if (OS_Status(&rspec) && create)
        HCreate(rfss.vRefNum, rfss.parID, rfss.name, 'CWIE', 'rsrc');

    err = HOpen(rfss.vRefNum, rfss.parID, rfss.name, permission, refNum);
    if (!err)
        OS_AddMacResourceForkRef(OS_MacToRef(*refNum), &rspec);

    return err;
}

OSErr HOpenRF(SInt16 vRefNum, SInt32 dirID, ConstStringPtr fileName, SInt8 permission, SInt16 *refNum) {
    FSSpec fss;
    OSErr __err;

    __err = FSMakeFSSpec(vRefNum, dirID, fileName, &fss);
    if (__err != noErr && __err != fnfErr) {
        return __err;
    } else {
        return FSpOpenRF(&fss, permission, refNum);
    }
}

OSErr InitResources(void) {
    MemRsrcMap *map;

    map = maplist;
    cur_res_file = 0;
    while (map) {
        cur_res_file = map->refnum;
        map = map->prev;
    }

    ResLoad = 1;
    resError = noErr;
    return 0;
}

OSErr ResError(void) {
    return resError;
}

void FSpCreateResFile(const FSSpec *fss, OSType creator, OSType fileType, ScriptCode scriptTag) {
    int oserr;
    OSSpec spec, rspec;
    SInt16 ref;

    FSpCreate(fss, creator, fileType, scriptTag);
    oserr = OS_FSSpec_To_OSSpec(fss, &spec);
    if (oserr) {
        resError = OS_MacError(oserr);
        return;
    }

    oserr = OS_GetRsrcOSSpec(&spec, &rspec, 1);
    if (oserr) {
        resError = OS_MacError(oserr);
        return;
    }

    if (OS_Status(&rspec)) {
        oserr = OS_Create(&rspec, &OS_TEXTTYPE);
        if (oserr) {
            resError = OS_MacError(oserr);
            return;
        }

        resError = FSpOpenRF(fss, 3, &ref);
        if (!resError) {
            WriteEmptyResourceFork(ref);
            FSClose(ref);
        }
    } else {
        resError = dupFNErr;
    }

}

void HCreateResFile(SInt16 vRefNum, SInt32 dirID, ConstStringPtr fileName) {
    FSSpec fss;
    OSErr __err;

    __err = FSMakeFSSpec(vRefNum, dirID, fileName, &fss);
    if (__err != noErr && __err != fnfErr) {
        resError = __err;
    } else {
        FSpCreateResFile(&fss, 'CWIE', kUnknownType, -1);
    }
}

OSErr FSpOpenResFile(const FSSpec *spec, SInt8 permission) {
    SInt16 ref;
    SInt32 size;

    if (permission != fsRdPerm)
        FSpCreate(spec, 'CWIE', 'TEXT', -1);

    resError = FSpOpenRF(spec, (permission == fsWrPerm) ? fsRdWrPerm : permission, &ref);
    if (!resError) {
        GetEOF(ref, &size);
        if (size == 0 && permission != fsRdPerm)
            WriteEmptyResourceFork(ref);
        ReadResourceFork(ref, permission, 0, 0);
        if (resError) {
            FSClose(ref);
            CloseResFile(ref);
            ref = -1;
        }
        cur_res_file = ref;
    } else {
        ref = -1;
    }

    return ref;
}

OSErr HOpenResFile(SInt16 vRefNum, SInt32 dirID, ConstStringPtr fileName, SInt8 permission) {
    FSSpec fss;
    OSErr __err;

    __err = FSMakeFSSpec(vRefNum, dirID, fileName, &fss);
    if (__err != noErr && __err != fnfErr)
        return __err;
    return FSpOpenResFile(&fss, permission);
}

SInt16 CurResFile(void) {
    return cur_res_file;
}

void UseResFile(SInt16 refNum) {
    MemRsrcMap *map;

    for (map = maplist; map; map = map->prev) {
        if (map->refnum == refNum) {
            cur_res_file = refNum;
            resError = noErr;
            return;
        }
    }

    resError = resFNotFound;
}

SInt16 HomeResFile(Handle theResource) {
    SInt16 refnum = FindResourceHandleFile(theResource);
    resError = (refnum == -1) ? resNotFound : 0;
    return refnum;
}

Handle GetResource(OSType theType, SInt16 theID) {
    MemRefList *mref;

    mref = FindResourceTypeAndID(theType, theID);
    if (mref) {
        resError = noErr;
        return mref->hand;
    } else {
        resError = ResLoad ? resNotFound : noErr;
        return 0;
    }
}

Handle Get1Resource(OSType theType, SInt16 theID) {
    MemRsrcMap *rm;
    MemRefList *mref;

    rm = FindResourceMap(cur_res_file);
    if (!rm) {
        resError = resFNotFound;
        return 0;
    }

    mref = FindResourceTypeAndID1(rm, theType, theID);
    if (mref) {
        resError = noErr;
        return mref->hand;
    } else {
        resError = ResLoad ? resNotFound : noErr;
        return 0;
    }
}

Handle GetNamedResource(OSType theType, ConstStringPtr theName) {
    MemRefList *mref;

    mref = FindResourceTypeAndName(theType, theName);
    if (mref) {
        resError = noErr;
        return mref->hand;
    } else {
        resError = ResLoad ? resNotFound : noErr;
        return 0;
    }
}

Handle Get1NamedResource(OSType theType, ConstStringPtr theName) {
    MemRsrcMap *rm;
    MemRefList *mref;

    rm = FindResourceMap(cur_res_file);
    if (!rm) {
        resError = resFNotFound;
        return 0;
    }

    mref = FindResourceTypeAndName1(rm, theType, theName);
    if (mref) {
        resError = noErr;
        return mref->hand;
    } else {
        resError = (ResLoad != 0) ? resNotFound : noErr;
        return 0;
    }
}

void SetResLoad(Boolean load) {
    ResLoad = load;
}

void MacEmul_LoadResource(Handle theResource) {
    resError = (theResource == 0) ? nilHandleErr : 0;
}

void GetResInfo(Handle theResource, SInt16 *theID, OSType *theType, StringPtr name) {
    MemRefList *mrle;

    mrle = FindResourceHandle(theResource);
    if (mrle) {
        resError = noErr;
        *theID = mrle->id;
        *theType = mrle->type;
        if (mrle->name)
            _pstrcpy(name, mrle->name);
        else
            name[0] = 0;
    } else {
        resError = resNotFound;
    }
}

void SetResInfo(Handle theResource, SInt16 theID, ConstStringPtr name) {
    MemRefList *mrle;

    mrle = FindResourceHandle(theResource);
    if (mrle) {
        resError = noErr;
        if (mrle->name)
            free(mrle->name);
        mrle->name = malloc(name[0] + 1);
        mrle->attr |= resChanged;
        if (mrle->name)
            _pstrcpy(mrle->name, name);
        else
            resError = memFullErr;
    } else {
        resError = resNotFound;
    }
}

SInt16 GetResAttrs(Handle theResource) {
    MemRefList *mrle;

    mrle = FindResourceHandle(theResource);
    if (mrle) {
        resError = noErr;
        return mrle->attr;
    } else {
        resError = resNotFound;
        return 0;
    }
}

void SetResAttrs(Handle theResource, SInt16 attrs) {
    MemRefList *mrle;

    mrle = FindResourceHandle(theResource);
    if (mrle) {
        resError = noErr;
        mrle->attr = attrs;
    } else {
        resError = resNotFound;
    }
}

void ChangedResource(Handle theResource) {
    MemRsrcMap *rm;
    MemRefList *mrle;

    rm = FindResourceMap(cur_res_file);
    mrle = FindResourceHandle(theResource);
    if (mrle) {
        if (rm && (rm->fork_attr & mapReadOnly)) {
            resError = resAttrErr;
        } else {
            resError = noErr;
            mrle->attr |= resChanged;
            rm->fork_attr |= mapChanged;
        }
    } else {
        resError = resNotFound;
    }
}

void AddResource(Handle theData, OSType theType, SInt16 theID, ConstStringPtr name) {
    MemRsrcMap *rm;
    MemRsrcTypeList *mtyp;
    MemRefList *mrle;
    StringPtr namecpy;

    rm = FindResourceMap(cur_res_file);
    if (rm) {
        if (rm->fork_attr & mapReadOnly) {
            resError = resAttrErr;
            return;
        }

        resError = noErr;
        mtyp = FindResourceType1(rm, theType);
        if (!mtyp) {
            mtyp = NewTypeListEntry(&rm->type_list, theType, 0, 0);
            if (!mtyp) {
                resError = memFullErr;
                return;
            }
            rm->fork_attr |= mapChanged;
        }
        if (!theData || FindResourceHandle(theData)) {
            resError = addResFailed;
            return;
        }

        if (name && name[0]) {
            namecpy = malloc(name[0] + 1);
            _pstrcpy(namecpy, name);
        } else {
            namecpy = 0;
        }

        mrle = NewRefListEntry(&mtyp->ref_list, theID, theType, namecpy, 2, theData);
        if (!mrle) {
            resError = memFullErr;
            return;
        }

        rm->fork_attr |= mapChanged;
    } else {
        resError = resFNotFound;
    }
}

void UpdateResFile(SInt16 refnum) {
    WriteResourceFork(refnum);
}

void WriteResource(Handle theResource) {
    resError = noErr;
}

void SetResPurge(Boolean install) {
}

SInt16 CountResources(OSType theType) {
    return CountResourceType(theType);
}

SInt16 Count1Resources(OSType theType) {
    MemRsrcMap *rm;

    rm = FindResourceMap(cur_res_file);
    if (rm) {
        resError = noErr;
        return CountResourceType1(rm, theType);
    } else {
        resError = resFNotFound;
        return 0;
    }
}

Handle GetIndResource(OSType theType, SInt16 index) {
    MemRefList *mrle;

    mrle = FindIndResource(theType, index);
    resError = mrle ? 0 : resNotFound;
    return mrle->hand;
}

Handle Get1IndResource(OSType theType, SInt16 index) {
    MemRsrcMap *rm;
    MemRefList *mrle;

    rm = FindResourceMap(cur_res_file);
    if (rm) {
        mrle = FindIndResource1(rm, theType, index);
        if (mrle) {
            resError = noErr;
            return mrle->hand;
        } else {
            resError = resNotFound;
            return 0;
        }
    } else {
        resError = resFNotFound;
        return 0;
    }
}

SInt16 Count1Types(void) {
    MemRsrcMap *rm;
    MemRsrcTypeList *rtl;
    SInt16 count;

    count = 0;
    rm = FindResourceMap(cur_res_file);
    if (rm) {
        rtl = rm->type_list;
        while (rtl) {
            rtl = rtl->next;
            ++count;
        }
    } else {
        resError = resFNotFound;
    }

    return count;
}

void Get1IndType(OSType *theType, SInt16 index) {
    MemRsrcMap *rm;
    MemRsrcTypeList *rtl;
    SInt16 count;

    count = 1;
    rm = FindResourceMap(cur_res_file);
    if (rm) {
        rtl = rm->type_list;
        while (rtl && count < index) {
            rtl = rtl->next;
            ++count;
        }
        if (rtl)
            *theType = rtl->type;
        else
            resError = inputOutOfBounds;
    } else {
        resError = resFNotFound;
    }
}

void ReleaseResource(Handle theResource) {
    resError = noErr;
}

void DetachResource(Handle theResource) {
    MemRefList *mrle;
    SInt32 ns;

    mrle = FindResourceHandle(theResource);
    if (mrle) {
        ns = GetHandleSize(theResource);
        mrle->hand = NewHandle(ns);
        if (!mrle->hand) {
            resError = memFullErr;
        } else {
            HLock(mrle->hand);
            HLock(theResource);
            memcpy(*mrle->hand, *theResource, ns);
            HUnlock(theResource);
            HUnlock(mrle->hand);
            resError = noErr;
        }
    } else {
        resError = resNotFound;
    }
}

void RemoveResource(Handle theResource) {
    resError = RemoveResourceHandle(theResource) ? 0 : rmvResFailed;
}

void CloseResFile(SInt16 refNum) {
    MemRsrcMap *rm = FindResourceMap(refNum);

    if (rm && refNum != -1) {
        WriteResourceFork(refNum);
        DeleteResources(refNum);
        FSClose(refNum);
    }

    cur_res_file = maplist ? maplist->refnum : 0;
}

SInt16 GetResFileAttrs(SInt16) {
    MemRsrcMap *rm = FindResourceMap(cur_res_file);

    if (rm) {
        resError = 0;
        return rm->fork_attr;
    } else {
        resError = resFNotFound;
        return 0;
    }
}

Boolean LMGetResLoad(void) {
    return 1;
}