icuSources/io/ufmt_cmn.h

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 ******************************************************************************
   5 *
   6 *   Copyright (C) 1998-2011, International Business Machines
   7 *   Corporation and others.  All Rights Reserved.
   8 *
   9 ******************************************************************************
  10 *
  11 * File ufmt_cmn.h
  12 *
  13 * Modification History:
  14 *
  15 *   Date        Name        Description
  16 *   12/02/98    stephen        Creation.
  17 *   03/12/99    stephen     Modified for new C API.
  18 *   03/15/99    stephen     Added defaultCPToUnicode, unicodeToDefaultCP
  19 ******************************************************************************
  20 */
  21
  22 #ifndef UFMT_CMN_H
  23 #define UFMT_CMN_H
  24
  25 #include "unicode/utypes.h"
  26 #include "unicode/utf16.h"
  27
  28 #define UFMT_DEFAULT_BUFFER_SIZE 128
  29 #define MAX_UCHAR_BUFFER_SIZE(buffer) ((int32_t)(sizeof(buffer)/(U16_MAX_LENGTH*sizeof(UChar))))
  30 #define MAX_UCHAR_BUFFER_NEEDED(strLen) ((strLen+1)*U16_MAX_LENGTH*sizeof(UChar))
  31
  32 /**
  33  * Enum representing the possible argument types for uprintf/uscanf
  34  */
  35 typedef enum ufmt_type_info {
  36     ufmt_empty = 0,
  37     ufmt_simple_percent, /* %% do nothing */
  38     ufmt_count,      /* special flag for count */
  39     ufmt_int,        /* int */
  40     ufmt_char,       /* int, cast to char */
  41     ufmt_string,     /* char* */
  42     ufmt_pointer,    /* void* */
  43     ufmt_float,      /* float */
  44     ufmt_double,     /* double */
  45     ufmt_uchar,      /* int, cast to UChar */
  46     ufmt_ustring     /* UChar* */
  47     /*ufmt_wchar,*/      /* wchar_t */
  48     /*ufmt_wstring,*/    /* wchar_t* */
  49     /*ufmt_date,*/       /* Date */
  50     /*ufmt_last*/
  51 } ufmt_type_info;
  52
  53 /**
  54  * Union representing a uprintf/uscanf argument
  55  */
  56 typedef union ufmt_args {
  57     int64_t int64Value;    /* int, UChar */
  58     float   floatValue;    /* float */
  59     double  doubleValue;   /* double */
  60     void    *ptrValue;     /* any pointer - void*, char*, wchar_t*, UChar* */
  61     /*wchar_t wcharValue;*/    /* wchar_t */    /* TODO: Should wchar_t be used? */
  62     /*UDate dateValue;*/     /* Date */
  63 } ufmt_args;
  64
  65 /**
  66  * Macro for determining the minimum of two numbers.
  67  * @param a An integer
  68  * @param b An integer
  69  * @return <TT>a</TT> if </TT>a < b</TT>, <TT>b</TT> otherwise
  70  */
  71 #define ufmt_min(a,b) ((a) < (b) ? (a) : (b))
  72
  73 /**
  74  * Convert a UChar in hex radix to an integer value.
  75  * @param c The UChar to convert.
  76  * @return The integer value of <TT>c</TT>.
  77  */
  78 int
  79 ufmt_digitvalue(UChar c);
  80
  81 /**
  82  * Determine if a UChar is a digit for a specified radix.
  83  * @param c The UChar to check.
  84  * @param radix The desired radix.
  85  * @return TRUE if <TT>c</TT> is a digit in <TT>radix</TT>, FALSE otherwise.
  86  */
  87 UBool
  88 ufmt_isdigit(UChar     c,
  89          int32_t     radix);
  90
  91 /**
  92  * Convert an int64_t to a UChar* in a specified radix
  93  * @param buffer The target buffer
  94  * @param len On input, the size of <TT>buffer</TT>.  On output,
  95  * the number of UChars written to <TT>buffer</TT>.
  96  * @param value The value to be converted
  97  * @param radix The desired radix
  98  * @param uselower TRUE means lower case will be used, FALSE means upper case
  99  * @param minDigits The minimum number of digits for for the formatted number,
 100  * which will be padded with zeroes. -1 means do not pad.
 101  */
 102 void
 103 ufmt_64tou(UChar     *buffer,
 104       int32_t     *len,
 105       uint64_t     value,
 106       uint8_t     radix,
 107       UBool    uselower,
 108       int32_t    minDigits);
 109
 110 /**
 111  * It's like ufmt_64tou, but with a pointer.
 112  * This functions avoids size constraints of 64-bit types.
 113  * Pointers can be at 32-128 bits in size.
 114  */
 115 void
 116 ufmt_ptou(UChar    *buffer,
 117           int32_t   *len,
 118           void      *value,
 119           UBool     uselower);
 120
 121 /**
 122  * Convert a UChar* in a specified radix to an int64_t.
 123  * @param buffer The target buffer
 124  * @param len On input, the size of <TT>buffer</TT>.  On output,
 125  * the number of UChars read from <TT>buffer</TT>.
 126  * @param radix The desired radix
 127  * @return The numeric value.
 128  */
 129 int64_t
 130 ufmt_uto64(const UChar     *buffer,
 131       int32_t     *len,
 132       int8_t     radix);
 133
 134 /**
 135  * Convert a UChar* in a specified radix to a pointer,
 136  * @param buffer The target buffer
 137  * @param len On input, the size of <TT>buffer</TT>.  On output,
 138  * the number of UChars read from <TT>buffer</TT>.
 139  * @param radix The desired radix
 140  * @return The pointer value.
 141  */
 142 void *
 143 ufmt_utop(const UChar     *buffer,
 144       int32_t     *len);
 145
 146 /**
 147  * Convert a string from the default codepage to Unicode.
 148  * @param s The string to convert, in the default codepage.
 149  * @param sSize The size of s to convert.
 150  * @param target The buffer to convert to.
 151  * @param tSize The size of target
 152  * @return A pointer to a newly allocated converted version of s, or 0
 153  * on error.
 154  */
 155 UChar*
 156 ufmt_defaultCPToUnicode(const char *s, int32_t sSize,
 157                         UChar *target, int32_t tSize);
 158
 159
 160
 161 #endif
 162