cmsio0.c

Linux下的无线网卡通用驱动程序

//
//  Little cms
//  Copyright (C) 1998-2005 Marti Maria
//
// Permission is hereby granted, free of charge, to any person obtaining 
// a copy of this software and associated documentation files (the "Software"), 
// to deal in the Software without restriction, including without limitation 
// the rights to use, copy, modify, merge, publish, distribute, sublicense, 
// and/or sell copies of the Software, and to permit persons to whom the Software 
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in 
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO 
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// 

// Generic I/O, tag dictionary management, profile struct



#include "lcms.h"


// Memory-based stream ---------------------------------------------------

typedef struct {
                LPBYTE Block;           // Points to allocated memory
                size_t Size;            // Size of allocated memory
                int Pointer;            // Points to current location
                int FreeBlockOnClose;   // As title

                } FILEMEM;

static
LPVOID MemoryOpen(LPBYTE Block, size_t Size, char Mode)
{
    FILEMEM* fm = (FILEMEM*) malloc(sizeof(FILEMEM));
    ZeroMemory(fm, sizeof(FILEMEM));

    if (Mode == 'r') {

        fm ->Block   = (LPBYTE) malloc(Size);
        if (fm ->Block == NULL) {
            free(fm);
            return NULL;
        }
    

        CopyMemory(fm->Block, Block, Size);
        fm ->FreeBlockOnClose = TRUE;
    }
    else {
        fm ->Block = Block;
        fm ->FreeBlockOnClose = FALSE;
    }

    fm ->Size    = Size;
    fm ->Pointer = 0;

    return (LPVOID) fm;
}


static
size_t MemoryRead(LPVOID buffer, size_t size, size_t count, struct _lcms_iccprofile_struct* Icc)
{   
     FILEMEM* ResData = (FILEMEM*) Icc ->stream;
     LPBYTE Ptr;
     size_t len = size * count;
     

     if (ResData -> Pointer + len > ResData -> Size){
        
         len = (ResData -> Size - ResData -> Pointer);
         cmsSignalError(LCMS_ERRC_WARNING, "Read from memory error. Got %d bytes, block should be of %d bytes", len * size, count * size);         
        
     }

    Ptr  = ResData -> Block;
    Ptr += ResData -> Pointer;
    CopyMemory(buffer, Ptr, len);        
    ResData -> Pointer += (int) len;

    return count;
}

// SEEK_CUR is assumed

static
BOOL MemorySeek(struct _lcms_iccprofile_struct* Icc, size_t offset)
{
    FILEMEM* ResData = (FILEMEM*) Icc ->stream;

    if (offset > ResData ->Size)
         cmsSignalError(LCMS_ERRC_ABORTED,  "Pointer error; probably corrupted file");        

    ResData ->Pointer = (DWORD) offset; 
    return FALSE; 
}

// FTell

static
size_t MemoryTell(struct _lcms_iccprofile_struct* Icc)
{
    FILEMEM* ResData = (FILEMEM*) Icc ->stream;

    return ResData -> Pointer;     
}


// Writes data to memory, also keeps used space for further reference

static
BOOL MemoryWrite(struct _lcms_iccprofile_struct* Icc, size_t size, void *Ptr)
{
        FILEMEM* ResData = (FILEMEM*) Icc ->stream;

       if (size == 0) return TRUE;
       
       if (ResData != NULL) 
           CopyMemory(ResData ->Block + Icc ->UsedSpace, Ptr, size);

       Icc->UsedSpace += size;    

       return TRUE;
}


static
BOOL MemoryClose(struct _lcms_iccprofile_struct* Icc)
{   
    FILEMEM* ResData = (FILEMEM*) Icc ->stream;

    if (ResData ->FreeBlockOnClose) {

        if (ResData ->Block) free(ResData ->Block);
    }
    free(ResData);
    return 0;
}


// File-based stream -------------------------------------------------------

static
LPVOID FileOpen(const char* filename)
{
    return (void*) fopen(filename, "rb");
}

static
size_t FileRead(void *buffer, size_t size, size_t count, struct _lcms_iccprofile_struct* Icc)
{
    size_t nReaded = fread(buffer, size, count, (FILE*) Icc->stream);
    if (nReaded != count) {
            cmsSignalError(LCMS_ERRC_WARNING, "Read error. Got %d bytes, block should be of %d bytes", nReaded * size, count * size);         
    }

    return nReaded;
}


static
BOOL FileSeek(struct _lcms_iccprofile_struct* Icc, size_t offset)
{
    if (fseek((FILE*) Icc ->stream, (long) offset, SEEK_SET) != 0) {

       cmsSignalError(LCMS_ERRC_ABORTED, "Seek error; probably corrupted file");
       return TRUE;
    }

    return FALSE;
}


static
size_t FileTell(struct _lcms_iccprofile_struct* Icc)
{    
    return ftell((FILE*) Icc ->stream);
}

// Writes data to stream, also keeps used space for further reference


static
BOOL FileWrite(struct _lcms_iccprofile_struct* Icc, size_t size, LPVOID Ptr)
{
       if (size == 0) return TRUE;
       
       Icc->UsedSpace += size;

       if (Icc->stream == NULL) {

              return TRUE;
       }

       return (fwrite(Ptr, size, 1, (FILE*) Icc->stream) == 1);
}


static
BOOL FileClose(struct _lcms_iccprofile_struct* Icc)
{   
    return fclose((FILE*) Icc ->stream);
}

// ----------------------------------------------------------------------------------------------------


// Creates an empty structure holding all required parameters

cmsHPROFILE _cmsCreateProfilePlaceholder(void)
{

    LPLCMSICCPROFILE Icc = (LPLCMSICCPROFILE) malloc(sizeof(LCMSICCPROFILE));
    if (Icc == NULL) return NULL;

    // Empty values
    ZeroMemory(Icc, sizeof(LCMSICCPROFILE));

    // Make sure illuminant is correct
    Icc ->Illuminant = *cmsD50_XYZ();

    // Set it to empty
    Icc -> TagCount   = 0;

    // Return the handle
    return (cmsHPROFILE) Icc;
}


// Return the number of tags
icInt32Number LCMSEXPORT cmsGetTagCount(cmsHPROFILE hProfile)
{
    LPLCMSICCPROFILE Icc = (LPLCMSICCPROFILE) hProfile;    
    return  Icc->TagCount;
}

// Return the tag signature of a given tag number
icTagSignature LCMSEXPORT cmsGetTagSignature(cmsHPROFILE hProfile, icInt32Number n)
{
    LPLCMSICCPROFILE Icc = (LPLCMSICCPROFILE) hProfile;    

    if (n < 0 || n > Icc->TagCount) return (icTagSignature) 0;  // Mark as not available

    return Icc ->TagNames[n];
}


// Search for a specific tag in tag dictionary
// Returns position or -1 if tag not found

icInt32Number _cmsSearchTag(LPLCMSICCPROFILE Profile, icTagSignature sig, BOOL lSignalError)
{
       icInt32Number i;

       if (sig == 0) return -1;     // 0 identifies a special tag holding raw memory.

       for (i=0; i < Profile -> TagCount; i++) {

              if (sig == Profile -> TagNames[i])
                            return i;
       }

       if (lSignalError)
            cmsSignalError(LCMS_ERRC_ABORTED, "Tag '%lx' not found", sig);

       return -1;
}


// Check existance

BOOL LCMSEXPORT cmsIsTag(cmsHPROFILE hProfile, icTagSignature sig)
{
       LPLCMSICCPROFILE  Icc = (LPLCMSICCPROFILE) (LPSTR) hProfile;
       return _cmsSearchTag(Icc, sig, FALSE) >= 0;
}



// Search for a particular tag, replace if found or add new one else

LPVOID _cmsInitTag(LPLCMSICCPROFILE Icc, icTagSignature sig, size_t size, const void* Init)
{
    LPVOID Ptr;
    icInt32Number i;
    
    i = _cmsSearchTag(Icc, sig, FALSE);

    if (i >=0) {
        
        if (Icc -> TagPtrs[i]) free(Icc -> TagPtrs[i]);
    }
    else  {

        i = Icc -> TagCount;
        Icc -> TagCount++;

        if (Icc ->TagCount >= MAX_TABLE_TAG) {

            cmsSignalError(LCMS_ERRC_ABORTED, "Too many tags (%d)", MAX_TABLE_TAG);
            Icc ->TagCount = MAX_TABLE_TAG-1;
        }
    }
    
    
    Ptr = malloc(size);
    CopyMemory(Ptr, Init, size);
    
    Icc ->TagNames[i] = sig;
    Icc ->TagSizes[i] = size;
    Icc ->TagPtrs[i]  = Ptr;
    
    return Ptr;
}





// Creates a profile from file read placeholder

LPLCMSICCPROFILE _cmsCreateProfileFromFilePlaceholder(const char* FileName)
{
    LPLCMSICCPROFILE NewIcc;
    LPVOID ICCfile = FileOpen(FileName);

    if (ICCfile == NULL) {

              cmsSignalError(LCMS_ERRC_ABORTED, "File '%s' not found", FileName);
              return NULL;  
    }

    NewIcc = (LPLCMSICCPROFILE) _cmsCreateProfilePlaceholder();
    if (NewIcc == NULL) return NULL;

    strncpy(NewIcc -> PhysicalFile, FileName, MAX_PATH-1);
    NewIcc ->stream = ICCfile;

    NewIcc ->Read  = FileRead; 
    NewIcc ->Seek  = FileSeek;
    NewIcc ->Tell  = FileTell;
    NewIcc ->Close = FileClose;
    NewIcc ->Write = NULL;