ICU-6.2.16.tar.gz

[apple/icu.git] / icuSources / io / ufile.h

/*
*******************************************************************************
*
*   Copyright (C) 1998-2004, International Business Machines
*   Corporation and others.  All Rights Reserved.
*
*******************************************************************************
*
* File ufile.h
*
* Modification History:
*
*   Date        Name        Description
*   12/01/98    stephen        Creation.
*   03/12/99    stephen     Modified for new C API.
*******************************************************************************
*/

#ifndef UFILE_H
#define UFILE_H

#include "unicode/utypes.h"
#include "unicode/ucnv.h"
#include "unicode/utrans.h"
#include "locbund.h"

/* The buffer size for fromUnicode calls */
#define UFILE_CHARBUFFER_SIZE 1024

/* The buffer size for toUnicode calls */
#define UFILE_UCHARBUFFER_SIZE 1024

/* A UFILE */

#if !UCONFIG_NO_TRANSLITERATION

typedef struct {
    UChar  *buffer;             /* Beginning of buffer */
    int32_t capacity;           /* Capacity of buffer */
    int32_t pos;                /* Beginning of untranslitted data */
    int32_t length;             /* Length *from beginning of buffer* of untranslitted data */
    UTransliterator *translit;
} UFILETranslitBuffer;

#endif

typedef struct u_localized_string {
    UChar       *fPos;          /* current pos in fUCBuffer */
    const UChar *fLimit;        /* data limit in fUCBuffer */
    UChar       *fBuffer;       /* Place to write the string */

#if !UCONFIG_NO_FORMATTING
    ULocaleBundle  fBundle; /* formatters */
#endif
} u_localized_string;

struct UFILE {
#if !UCONFIG_NO_TRANSLITERATION
    UFILETranslitBuffer *fTranslit;
#endif

    FILE        *fFile;         /* the actual filesystem interface */

    UConverter  *fConverter;    /* for codeset conversion */

    u_localized_string str;     /* struct to handle strings for number formatting */

    UChar       fUCBuffer[UFILE_UCHARBUFFER_SIZE];/* buffer used for toUnicode */

    UBool       fOwnFile;       /* TRUE if fFile should be closed */

    int32_t     fFileno;        /* File number. Useful to determine if it's stdin. */
};

/**
 * Like u_file_write but takes a flush parameter
 */
U_CAPI int32_t U_EXPORT2
u_file_write_flush(    const UChar     *chars, 
        int32_t        count, 
        UFILE         *f,
        UBool         flush);

/**
 * Fill a UFILE's buffer with converted codepage data.
 * @param f The UFILE containing the buffer to fill.
 */
void
ufile_fill_uchar_buffer(UFILE *f);

/**
 * Get one code unit and detect whether the end of file has been reached.
 * @param f The UFILE containing the characters.
 * @param ch The read in character
 * @return TRUE if the character is valid, or FALSE when EOF has been detected
 */
U_CFUNC UBool U_EXPORT2
ufile_getch(UFILE *f, UChar *ch);

/**
 * Get one character and detect whether the end of file has been reached.
 * @param f The UFILE containing the characters.
 * @param ch The read in character
 * @return TRUE if the character is valid, or FALSE when EOF has been detected
 */
U_CFUNC UBool U_EXPORT2
ufile_getch32(UFILE *f, UChar32 *ch);

/**
 * Close out the transliterator and flush any data therein.
 * @param f flu
 */
void 
ufile_close_translit(UFILE *f);

/**
 * Flush the buffer in the transliterator 
 * @param f UFile to flush
 */
void 
ufile_flush_translit(UFILE *f);


#endif