icu4c/source/io/uprintf.h

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
*
*   Copyright (C) 1998-2006, International Business Machines
*   Corporation and others.  All Rights Reserved.
*
******************************************************************************
*
* File uprintf.h
*
* Modification History:
*
*   Date        Name        Description
*   11/19/98    stephen        Creation.
*   03/12/99    stephen     Modified for new C API.
******************************************************************************
*/

#ifndef UPRINTF_H
#define UPRINTF_H

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

#include "unicode/ustdio.h"
#include "ufmt_cmn.h"
#include "locbund.h"

/**
 * Struct encapsulating a single uprintf format specification.
 */
typedef struct u_printf_spec_info {
  int32_t    fPrecision;    /* Precision  */
  int32_t    fWidth;        /* Width  */

  UChar     fOrigSpec;      /* Conversion specification */
  UChar     fSpec;          /* Conversion specification */
  UChar     fPadChar;       /* Padding character  */

  UBool     fAlt;           /* # flag  */
  UBool     fSpace;         /* Space flag  */
  UBool     fLeft;          /* - flag  */
  UBool     fShowSign;      /* + flag  */
  UBool     fZero;          /* 0 flag  */

  UBool     fIsLongDouble;  /* L flag  */
  UBool     fIsShort;       /* h flag  */
  UBool     fIsLong;        /* l flag  */
  UBool     fIsLongLong;    /* ll flag  */
} u_printf_spec_info;

typedef int32_t U_EXPORT2
u_printf_write_stream(void          *context,
                      const UChar   *str,
                      int32_t       count);

typedef int32_t U_EXPORT2
u_printf_pad_and_justify_stream(void                        *context,
                                const u_printf_spec_info    *info,
                                const UChar                 *result,
                                int32_t                     resultLen);

typedef struct u_printf_stream_handler {
    u_printf_write_stream *write;
    u_printf_pad_and_justify_stream *pad_and_justify;
} u_printf_stream_handler;

/* Used by sprintf */
typedef struct u_localized_print_string {
    UChar     *str;     /* Place to write the string */
    int32_t   available;/* Number of codeunits available to write to */
    int32_t   len;      /* Maximum number of code units that can be written to output */

    ULocaleBundle  fBundle;     /* formatters */
} u_localized_print_string;

#define UP_PERCENT 0x0025

/**
 * Parse a single u_printf format string.
 * @param fmt A pointer to a '%' character in a u_printf format specification.
 * @param spec A pointer to a <TT>u_printf_spec</TT> to receive the parsed
 * format specifier.
 * @param locStringContext If present, will make sure that it will only write
 *          to the buffer when space is available. It's done this way because
 *          va_list sometimes can't be passed by pointer.
 * @return The number of characters contained in this specifier.
 */
U_CFUNC int32_t
u_printf_parse(const u_printf_stream_handler *streamHandler,
               const UChar     *fmt,
               void            *context,
               u_localized_print_string *locStringContext,
               ULocaleBundle   *formatBundle,
               int32_t         *written,
               va_list         ap);

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif