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src/Source/FreeImage/PluginRAW.cpp  view on Meta::CPAN

// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
// THIS DISCLAIMER.
//
// Use at your own risk!
// ==========================================================

#include "../LibRawLite/libraw/libraw.h"

#include "FreeImage.h"
#include "Utilities.h"
#include "../Metadata/FreeImageTag.h"

// ==========================================================
// Plugin Interface
// ==========================================================

static int s_format_id;

// ==========================================================
// Internal functions
// ==========================================================

// ----------------------------------------------------------
//   FreeImage datastream wrapper
// ----------------------------------------------------------

class LibRaw_freeimage_datastream : public LibRaw_abstract_datastream {
private: 
	FreeImageIO *_io;
	fi_handle _handle;
	long _eof;
	INT64 _fsize;

public:
	LibRaw_freeimage_datastream(FreeImageIO *io, fi_handle handle) : _io(io), _handle(handle) {
		long start_pos = io->tell_proc(handle);
		io->seek_proc(handle, 0, SEEK_END);
		_eof = io->tell_proc(handle);
		_fsize = _eof - start_pos;
		io->seek_proc(handle, start_pos, SEEK_SET);
	}

	~LibRaw_freeimage_datastream() {
	}

    int valid() { 
		return (_io && _handle);
	}

    int read(void *buffer, size_t size, size_t count) { 
		if(substream) return substream->read(buffer, size, count);
		return _io->read_proc(buffer, (unsigned)size, (unsigned)count, _handle);
	}

    int seek(INT64 offset, int origin) { 
        if(substream) return substream->seek(offset, origin);
		return _io->seek_proc(_handle, (long)offset, origin);
	}

    INT64 tell() { 
		if(substream) return substream->tell();
        return _io->tell_proc(_handle);
    }
	
	INT64 size() {
		return _fsize;
	}

    int get_char() { 
		int c = 0;
		if(substream) return substream->get_char();
		if(!_io->read_proc(&c, 1, 1, _handle)) return -1;
		return c;
   }
	
	char* gets(char *buffer, int length) { 
		if (substream) return substream->gets(buffer, length);
		memset(buffer, 0, length);
		for(int i = 0; i < length; i++) {
			if(!_io->read_proc(&buffer[i], 1, 1, _handle))
				return NULL;
			if(buffer[i] == 0x0A)
				break;
		}
		return buffer;
	}

	int scanf_one(const char *fmt, void* val) {
		std::string buffer;
		char element = 0;
		bool bDone = false;
		if(substream) return substream->scanf_one(fmt,val);				
		do {
			if(_io->read_proc(&element, 1, 1, _handle) == 1) {
				switch(element) {
					case '0':
					case '\n':
					case ' ':
					case '\t':
						bDone = true;
						break;
					default:
						break;
				}
				buffer.append(&element, 1);
			} else {
				return 0;
			}
		} while(!bDone);

		return sscanf(buffer.c_str(), fmt, val);
	}

	int eof() { 
		if(substream) return substream->eof();
        return (_io->tell_proc(_handle) >= _eof);
    }