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******************************************************************************
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* Copyright (C) 1998-2010, International Business Machines
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* Corporation and others. All Rights Reserved.
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******************************************************************************
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* Modification History:
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* Date Name Description
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* 10/16/98 stephen Creation.
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* 11/06/98 stephen Modified per code review.
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* 03/12/99 stephen Modified for new C API.
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* 07/19/99 stephen Minor doc update.
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* 02/01/01 george Added sprintf & sscanf with all of its variants
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******************************************************************************
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#include "unicode/utypes.h"
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#include "unicode/ucnv.h"
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#include "unicode/utrans.h"
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#include "unicode/localpointer.h"
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The following is a small list as to what is currently wrong/suggestions for
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* Make sure that * in the scanf format specification works for all formats.
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* Each UFILE takes up at least 2KB.
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Look into adding setvbuf() for configurable buffers.
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* This library does buffering. The OS should do this for us already. Check on
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this, and remove it from this library, if this is the case. Double buffering
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wastes a lot of time and space.
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* Test stdin and stdout with the u_f* functions
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* Testing should be done for reading and writing multi-byte encodings,
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and make sure that a character that is contained across buffer boundries
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works even for incomplete characters.
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* Make sure that the last character is flushed when the file/string is closed.
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* snprintf should follow the C99 standard for the return value, which is
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return the number of characters (excluding the trailing '\0')
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which would have been written to the destination string regardless
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of available space. This is like pre-flighting.
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* Everything that uses %s should do what operator>> does for UnicodeString.
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It should convert one byte at a time, and once a character is
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converted then check to see if it's whitespace or in the scanset.
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If it's whitespace or in the scanset, put all the bytes back (do nothing
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* If bad string data is encountered, make sure that the function fails
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without memory leaks and the unconvertable characters are valid
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substitution or are escaped characters.
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* u_fungetc() can't unget a character when it's at the beginning of the
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internal conversion buffer. For example, read the buffer size # of
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characters, and then ungetc to get the previous character that was
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at the end of the last buffer.
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* u_fflush() and u_fclose should return an int32_t like C99 functions.
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0 is returned if the operation was successful and EOF otherwise.
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* u_fsettransliterator does not support U_READ side of transliteration.
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* The format specifier should limit the size of a format or honor it in
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order to prevent buffer overruns. (e.g. %256.256d).
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* u_fread and u_fwrite don't exist. They're needed for reading and writing
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data structures without any conversion.
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* u_file_read and u_file_write are used for writing strings. u_fgets and
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u_fputs or u_fread and u_fwrite should be used to do this.
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* The width parameter for all scanf formats, including scanset, needs
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better testing. This prevents buffer overflows.
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* Figure out what is suppose to happen when a codepage is changed midstream.
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Maybe a flush or a rewind are good enough.
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* Make sure that a UFile opened with "rw" can be used after using
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u_fflush with a u_frewind.
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* scanf(%i) should detect what type of number to use.
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* Add more testing of the alternate format, %#
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* Look at newline handling of fputs/puts
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* Think more about codeunit/codepoint error handling/support in %S,%s,%C,%c,%[]
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* Complete the file documentation with proper doxygen formatting.
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See http://oss.software.ibm.com/pipermail/icu/2003-July/005647.html
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* \brief C API: Unicode stdio-like API
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* <h2>Unicode stdio-like C API</h2>
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* <p>This API provides an stdio-like API wrapper around ICU's other
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* formatting and parsing APIs. It is meant to ease the transition of adding
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* Unicode support to a preexisting applications using stdio. The following
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* is a small list of noticable differences between stdio and ICU I/O's
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* ustdio implementation.</p>
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* <li>Locale specific formatting and parsing is only done with file IO.</li>
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* <li>u_fstropen can be used to simulate file IO with strings.
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* This is similar to the iostream API, and it allows locale specific
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* formatting and parsing to be used.</li>
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* <li>This API provides uniform formatting and parsing behavior between
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* platforms (unlike the standard stdio implementations found on various
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* <li>This API is better suited for text data handling than binary data
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* handling when compared to the typical stdio implementation.</li>
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* <li>You can specify a Transliterator while using the file IO.</li>
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* <li>You can specify a file's codepage separately from the default
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* system codepage.</li>
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* <h2>Formatting and Parsing Specification</h2>
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* General printf format:<br>
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* %[format modifier][width][.precision][type modifier][format]
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* General scanf format:<br>
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* %[*][format modifier][width][type modifier][format]
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<table cellspacing="3">
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<tr><td>format</td><td>default<br>printf<br>type</td><td>default<br>scanf<br>type</td><td>description</td></tr>
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<tr><td>%E</td><td>double</td><td>float</td><td>Scientific with an uppercase exponent</td></tr>
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<tr><td>%e</td><td>double</td><td>float</td><td>Scientific with a lowercase exponent</td></tr>
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<tr><td>%G</td><td>double</td><td>float</td><td>Use %E or %f for best format</td></tr>
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<tr><td>%g</td><td>double</td><td>float</td><td>Use %e or %f for best format</td></tr>
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<tr><td>%f</td><td>double</td><td>float</td><td>Simple floating point without the exponent</td></tr>
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<tr><td>%X</td><td>int32_t</td><td>int32_t</td><td>ustdio special uppercase hex radix formatting</td></tr>
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<tr><td>%x</td><td>int32_t</td><td>int32_t</td><td>ustdio special lowercase hex radix formatting</td></tr>
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<tr><td>%d</td><td>int32_t</td><td>int32_t</td><td>Decimal format</td></tr>
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<tr><td>%i</td><td>int32_t</td><td>int32_t</td><td>Same as %d</td></tr>
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<tr><td>%n</td><td>int32_t</td><td>int32_t</td><td>count (write the number of UTF-16 codeunits read/written)</td></tr>
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<tr><td>%o</td><td>int32_t</td><td>int32_t</td><td>ustdio special octal radix formatting</td></tr>
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<tr><td>%u</td><td>uint32_t</td><td>uint32_t</td><td>Decimal format</td></tr>
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<tr><td>%p</td><td>void *</td><td>void *</td><td>Prints the pointer value</td></tr>
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<tr><td>%s</td><td>char *</td><td>char *</td><td>Use default converter or specified converter from fopen</td></tr>
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<tr><td>%c</td><td>char</td><td>char</td><td>Use default converter or specified converter from fopen<br>
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When width is specified for scanf, this acts like a non-NULL-terminated char * string.<br>
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By default, only one char is written.</td></tr>
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<tr><td>%S</td><td>UChar *</td><td>UChar *</td><td>Null terminated UTF-16 string</td></tr>
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<tr><td>%C</td><td>UChar</td><td>UChar</td><td>16-bit Unicode code unit<br>
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When width is specified for scanf, this acts like a non-NULL-terminated UChar * string<br>
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By default, only one codepoint is written.</td></tr>
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<tr><td>%[]</td><td> </td><td>UChar *</td><td>Null terminated UTF-16 string which contains the filtered set of characters specified by the UnicodeSet</td></tr>
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<tr><td>%%</td><td> </td><td> </td><td>Show a percent sign</td></tr>
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<tr><td>modifier</td><td>formats</td><td>type</td><td>comments</td></tr>
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<tr><td>%h</td><td>%d, %i, %o, %x</td><td>int16_t</td><td>short format</td></tr>
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<tr><td>%h</td><td>%u</td><td>uint16_t</td><td>short format</td></tr>
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<tr><td>%h</td><td>c</td><td>char</td><td><b>(Unimplemented)</b> Use invariant converter</td></tr>
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<tr><td>%h</td><td>s</td><td>char *</td><td><b>(Unimplemented)</b> Use invariant converter</td></tr>
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<tr><td>%h</td><td>C</td><td>char</td><td><b>(Unimplemented)</b> 8-bit Unicode code unit</td></tr>
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<tr><td>%h</td><td>S</td><td>char *</td><td><b>(Unimplemented)</b> Null terminated UTF-8 string</td></tr>
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<tr><td>%l</td><td>%d, %i, %o, %x</td><td>int32_t</td><td>long format (no effect)</td></tr>
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<tr><td>%l</td><td>%u</td><td>uint32_t</td><td>long format (no effect)</td></tr>
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<tr><td>%l</td><td>c</td><td>N/A</td><td><b>(Unimplemented)</b> Reserved for future implementation</td></tr>
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<tr><td>%l</td><td>s</td><td>N/A</td><td><b>(Unimplemented)</b> Reserved for future implementation</td></tr>
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<tr><td>%l</td><td>C</td><td>UChar32</td><td><b>(Unimplemented)</b> 32-bit Unicode code unit</td></tr>
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<tr><td>%l</td><td>S</td><td>UChar32 *</td><td><b>(Unimplemented)</b> Null terminated UTF-32 string</td></tr>
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<tr><td>%ll</td><td>%d, %i, %o, %x</td><td>int64_t</td><td>long long format</td></tr>
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<tr><td>%ll</td><td>%u</td><td>uint64_t</td><td><b>(Unimplemented)</b> long long format</td></tr>
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<tr><td>%-</td><td><i>all</i></td><td>N/A</td><td>Left justify</td></tr>
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<tr><td>%+</td><td>%d, %i, %o, %x, %e, %f, %g, %E, %G</td><td>N/A</td><td>Always show the plus or minus sign. Needs data for plus sign.</td></tr>
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<tr><td>% </td><td>%d, %i, %o, %x, %e, %f, %g, %E, %G</td><td>N/A</td><td>Instead of a "+" output a blank character for positive numbers.</td></tr>
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<tr><td>%#</td><td>%d, %i, %o, %x, %e, %f, %g, %E, %G</td><td>N/A</td><td>Precede octal value with 0, hex with 0x and show the
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decimal point for floats.</td></tr>
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<tr><td>%<i>n</i></td><td><i>all</i></td><td>N/A</td><td>Width of input/output. num is an actual number from 0 to
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some large number.</td></tr>
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<tr><td>%.<i>n</i></td><td>%e, %f, %g, %E, %F, %G</td><td>N/A</td><td>Significant digits precision. num is an actual number from
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0 to some large number.<br>If * is used in printf, then the precision is passed in as an argument before the number to be formatted.</td></tr>
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%* int32_t Next argument after this one specifies the width
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%* N/A This field is scanned, but not stored
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<p>If you are using this C API instead of the ustream.h API for C++,
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you can use one of the following u_fprintf examples to display a UnicodeString.</p>
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UFILE *out = u_finit(stdout, NULL, NULL);
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UnicodeString string1("string 1");
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UnicodeString string2("string 2");
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u_fprintf(out, "%S\n", string1.getTerminatedBuffer());
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u_fprintf(out, "%.*S\n", string2.length(), string2.getBuffer());
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* When an end of file is encountered, this value can be returned.
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/** Forward declaration of a Unicode-aware file @stable 3.0 */
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typedef struct UFILE UFILE;
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* Enum for which direction of stream a transliterator applies to.
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* @see u_fsettransliterator
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U_READWRITE =3 /* == (U_READ | U_WRITE) */
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* A UFILE is a wrapper around a FILE* that is locale and codepage aware.
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* That is, data written to a UFILE will be formatted using the conventions
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* specified by that UFILE's Locale; this data will be in the character set
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* specified by that UFILE's codepage.
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* @param filename The name of the file to open.
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* @param perm The read/write permission for the UFILE; one of "r", "w", "rw"
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* @param locale The locale whose conventions will be used to format
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* and parse output. If this parameter is NULL, the default locale will
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* @param codepage The codepage in which data will be written to and
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* read from the file. If this paramter is NULL the system default codepage
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* @return A new UFILE, or NULL if an error occurred.
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U_STABLE UFILE* U_EXPORT2
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u_fopen(const char *filename,
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const char *codepage);
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* Open a UFILE on top of an existing FILE* stream. The FILE* stream
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* ownership remains with the caller. To have the UFILE take over
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* ownership and responsibility for the FILE* stream, use the
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* @param f The FILE* to which this UFILE will attach and use.
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* @param locale The locale whose conventions will be used to format
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* and parse output. If this parameter is NULL, the default locale will
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* @param codepage The codepage in which data will be written to and
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* read from the file. If this paramter is NULL, data will be written and
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* read using the default codepage for <TT>locale</TT>, unless <TT>locale</TT>
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* is NULL, in which case the system default codepage will be used.
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* @return A new UFILE, or NULL if an error occurred.
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U_STABLE UFILE* U_EXPORT2
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const char *codepage);
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* Open a UFILE on top of an existing FILE* stream. The FILE* stream
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* ownership is transferred to the new UFILE. It will be closed when the
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* @param f The FILE* which this UFILE will take ownership of.
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* @param locale The locale whose conventions will be used to format
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* and parse output. If this parameter is NULL, the default locale will
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* @param codepage The codepage in which data will be written to and
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* read from the file. If this paramter is NULL, data will be written and
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* read using the default codepage for <TT>locale</TT>, unless <TT>locale</TT>
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* is NULL, in which case the system default codepage will be used.
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* @return A new UFILE, or NULL if an error occurred. If an error occurs
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* the ownership of the FILE* stream remains with the caller.
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U_STABLE UFILE* U_EXPORT2
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const char *codepage);
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* Create a UFILE that can be used for localized formatting or parsing.
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* The u_sprintf and u_sscanf functions do not read or write numbers for a
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* specific locale. The ustdio.h file functions can be used on this UFILE.
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* The string is usable once u_fclose or u_fflush has been called on the
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* @param stringBuf The string used for reading or writing.
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* @param capacity The number of code units available for use in stringBuf
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* @param locale The locale whose conventions will be used to format
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* and parse output. If this parameter is NULL, the default locale will
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* @return A new UFILE, or NULL if an error occurred.
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U_STABLE UFILE* U_EXPORT2
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u_fstropen(UChar *stringBuf,
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* Close a UFILE. Implies u_fflush first.
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* @param file The UFILE to close.
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U_STABLE void U_EXPORT2
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u_fclose(UFILE *file);
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#if U_SHOW_CPLUSPLUS_API
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* \class LocalUFILEPointer
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* "Smart pointer" class, closes a UFILE via u_fclose().
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* For most methods see the LocalPointerBase base class.
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* @see LocalPointerBase
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U_DEFINE_LOCAL_OPEN_POINTER(LocalUFILEPointer, UFILE, u_fclose);
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* Tests if the UFILE is at the end of the file stream.
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* @param f The UFILE from which to read.
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* @return Returns TRUE after the first read operation that attempts to
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* read past the end of the file. It returns FALSE if the current position is
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U_STABLE UBool U_EXPORT2
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* Flush output of a UFILE. Implies a flush of
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* converter/transliterator state. (That is, a logical break is
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* made in the output stream - for example if a different type of
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* output is desired.) The underlying OS level file is also flushed.
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* Note that for a stateful encoding, the converter may write additional
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* bytes to return the stream to default state.
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* @param file The UFILE to flush.
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U_STABLE void U_EXPORT2
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u_fflush(UFILE *file);
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* Rewind the file pointer to the beginning of the file.
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* @param file The UFILE to rewind.
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u_frewind(UFILE *file);
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* Get the FILE* associated with a UFILE.
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* @return A FILE*, owned by the UFILE. The FILE <EM>must not</EM> be closed.
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U_STABLE FILE* U_EXPORT2
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u_fgetfile(UFILE *f);
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#if !UCONFIG_NO_FORMATTING
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* Get the locale whose conventions are used to format and parse output.
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* This is the same locale passed in the preceding call to<TT>u_fsetlocale</TT>
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* or <TT>u_fopen</TT>.
379
* @param file The UFILE to set.
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* @return The locale whose conventions are used to format and parse output.
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U_STABLE const char* U_EXPORT2
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u_fgetlocale(UFILE *file);
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* Set the locale whose conventions will be used to format and parse output.
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* @param locale The locale whose conventions will be used to format
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* @param file The UFILE to query.
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* @return NULL if successful, otherwise a negative number.
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U_STABLE int32_t U_EXPORT2
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u_fsetlocale(UFILE *file,
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* Get the codepage in which data is written to and read from the UFILE.
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* This is the same codepage passed in the preceding call to
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* <TT>u_fsetcodepage</TT> or <TT>u_fopen</TT>.
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* @param file The UFILE to query.
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* @return The codepage in which data is written to and read from the UFILE,
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* or NULL if an error occurred.
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U_STABLE const char* U_EXPORT2
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u_fgetcodepage(UFILE *file);
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* Set the codepage in which data will be written to and read from the UFILE.
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* All Unicode data written to the UFILE will be converted to this codepage
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* before it is written to the underlying FILE*. It it generally a bad idea to
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* mix codepages within a file. This should only be called right
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* after opening the <TT>UFile</TT>, or after calling <TT>u_frewind</TT>.
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* @param codepage The codepage in which data will be written to
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* and read from the file. For example <TT>"latin-1"</TT> or <TT>"ibm-943"</TT>.
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* A value of NULL means the default codepage for the UFILE's current
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* locale will be used.
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* @param file The UFILE to set.
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* @return 0 if successful, otherwise a negative number.
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U_STABLE int32_t U_EXPORT2
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u_fsetcodepage(const char *codepage,
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* Returns an alias to the converter being used for this file.
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* @param f The UFILE to get the value from
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* @return alias to the converter
438
U_STABLE UConverter* U_EXPORT2 u_fgetConverter(UFILE *f);
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#if !UCONFIG_NO_FORMATTING
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/* Output functions */
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* Write formatted data to a UFILE.
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* @param f The UFILE to which to write.
447
* @param patternSpecification A pattern specifying how <TT>u_fprintf</TT> will
448
* interpret the variable arguments received and format the data.
449
* @return The number of Unicode characters written to <TT>f</TT>.
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U_STABLE int32_t U_EXPORT2
454
const char *patternSpecification,
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* Write formatted data to a UFILE.
459
* This is identical to <TT>u_fprintf</TT>, except that it will
460
* <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>.
461
* @param f The UFILE to which to write.
462
* @param patternSpecification A pattern specifying how <TT>u_fprintf</TT> will
463
* interpret the variable arguments received and format the data.
464
* @param ap The argument list to use.
465
* @return The number of Unicode characters written to <TT>f</TT>.
469
U_STABLE int32_t U_EXPORT2
471
const char *patternSpecification,
475
* Write formatted data to a UFILE.
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* @param f The UFILE to which to write.
477
* @param patternSpecification A pattern specifying how <TT>u_fprintf</TT> will
478
* interpret the variable arguments received and format the data.
479
* @return The number of Unicode characters written to <TT>f</TT>.
482
U_STABLE int32_t U_EXPORT2
483
u_fprintf_u(UFILE *f,
484
const UChar *patternSpecification,
488
* Write formatted data to a UFILE.
489
* This is identical to <TT>u_fprintf_u</TT>, except that it will
490
* <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>.
491
* @param f The UFILE to which to write.
492
* @param patternSpecification A pattern specifying how <TT>u_fprintf</TT> will
493
* interpret the variable arguments received and format the data.
494
* @param ap The argument list to use.
495
* @return The number of Unicode characters written to <TT>f</TT>.
499
U_STABLE int32_t U_EXPORT2
500
u_vfprintf_u(UFILE *f,
501
const UChar *patternSpecification,
505
* Write a Unicode to a UFILE. The null (U+0000) terminated UChar*
506
* <TT>s</TT> will be written to <TT>f</TT>, excluding the NULL terminator.
507
* A newline will be added to <TT>f</TT>.
508
* @param s The UChar* to write.
509
* @param f The UFILE to which to write.
510
* @return A non-negative number if successful, EOF otherwise.
514
U_STABLE int32_t U_EXPORT2
515
u_fputs(const UChar *s,
519
* Write a UChar to a UFILE.
520
* @param uc The UChar to write.
521
* @param f The UFILE to which to write.
522
* @return The character written if successful, EOF otherwise.
525
U_STABLE UChar32 U_EXPORT2
530
* Write Unicode to a UFILE.
531
* The ustring passed in will be converted to the UFILE's underlying
532
* codepage before it is written.
533
* @param ustring A pointer to the Unicode data to write.
534
* @param count The number of Unicode characters to write
535
* @param f The UFILE to which to write.
536
* @return The number of Unicode characters written.
540
U_STABLE int32_t U_EXPORT2
541
u_file_write(const UChar *ustring,
546
/* Input functions */
547
#if !UCONFIG_NO_FORMATTING
550
* Read formatted data from a UFILE.
551
* @param f The UFILE from which to read.
552
* @param patternSpecification A pattern specifying how <TT>u_fscanf</TT> will
553
* interpret the variable arguments received and parse the data.
554
* @return The number of items successfully converted and assigned, or EOF
555
* if an error occurred.
558
U_STABLE int32_t U_EXPORT2
560
const char *patternSpecification,
564
* Read formatted data from a UFILE.
565
* This is identical to <TT>u_fscanf</TT>, except that it will
566
* <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>.
567
* @param f The UFILE from which to read.
568
* @param patternSpecification A pattern specifying how <TT>u_fscanf</TT> will
569
* interpret the variable arguments received and parse the data.
570
* @param ap The argument list to use.
571
* @return The number of items successfully converted and assigned, or EOF
572
* if an error occurred.
576
U_STABLE int32_t U_EXPORT2
578
const char *patternSpecification,
582
* Read formatted data from a UFILE.
583
* @param f The UFILE from which to read.
584
* @param patternSpecification A pattern specifying how <TT>u_fscanf</TT> will
585
* interpret the variable arguments received and parse the data.
586
* @return The number of items successfully converted and assigned, or EOF
587
* if an error occurred.
590
U_STABLE int32_t U_EXPORT2
592
const UChar *patternSpecification,
596
* Read formatted data from a UFILE.
597
* This is identical to <TT>u_fscanf_u</TT>, except that it will
598
* <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>.
599
* @param f The UFILE from which to read.
600
* @param patternSpecification A pattern specifying how <TT>u_fscanf</TT> will
601
* interpret the variable arguments received and parse the data.
602
* @param ap The argument list to use.
603
* @return The number of items successfully converted and assigned, or EOF
604
* if an error occurred.
608
U_STABLE int32_t U_EXPORT2
609
u_vfscanf_u(UFILE *f,
610
const UChar *patternSpecification,
615
* Read one line of text into a UChar* string from a UFILE. The newline
616
* at the end of the line is read into the string. The string is always
618
* @param f The UFILE from which to read.
619
* @param n The maximum number of characters - 1 to read.
620
* @param s The UChar* to receive the read data. Characters will be
621
* stored successively in <TT>s</TT> until a newline or EOF is
622
* reached. A null character (U+0000) will be appended to <TT>s</TT>.
623
* @return A pointer to <TT>s</TT>, or NULL if no characters were available.
626
U_STABLE UChar* U_EXPORT2
632
* Read a UChar from a UFILE. It is recommended that <TT>u_fgetcx</TT>
633
* used instead for proper parsing functions, but sometimes reading
634
* code units is needed instead of codepoints.
636
* @param f The UFILE from which to read.
637
* @return The UChar value read, or U+FFFF if no character was available.
640
U_STABLE UChar U_EXPORT2
644
* Read a UChar32 from a UFILE.
646
* @param f The UFILE from which to read.
647
* @return The UChar32 value read, or U_EOF if no character was
648
* available, or U+FFFFFFFF if an ill-formed character was
653
U_STABLE UChar32 U_EXPORT2
657
* Unget a UChar from a UFILE.
658
* If this function is not the first to operate on <TT>f</TT> after a call
659
* to <TT>u_fgetc</TT>, the results are undefined.
660
* If this function is passed a character that was not recieved from the
661
* previous <TT>u_fgetc</TT> or <TT>u_fgetcx</TT> call, the results are undefined.
662
* @param c The UChar to put back on the stream.
663
* @param f The UFILE to receive <TT>c</TT>.
664
* @return The UChar32 value put back if successful, U_EOF otherwise.
667
U_STABLE UChar32 U_EXPORT2
672
* Read Unicode from a UFILE.
673
* Bytes will be converted from the UFILE's underlying codepage, with
674
* subsequent conversion to Unicode. The data will not be NULL terminated.
675
* @param chars A pointer to receive the Unicode data.
676
* @param count The number of Unicode characters to read.
677
* @param f The UFILE from which to read.
678
* @return The number of Unicode characters read.
681
U_STABLE int32_t U_EXPORT2
682
u_file_read(UChar *chars,
686
#if !UCONFIG_NO_TRANSLITERATION
689
* Set a transliterator on the UFILE. The transliterator will be owned by the
691
* @param file The UFILE to set transliteration on
692
* @param adopt The UTransliterator to set. Can be NULL, which will
693
* mean that no transliteration is used.
694
* @param direction either U_READ, U_WRITE, or U_READWRITE - sets
695
* which direction the transliterator is to be applied to. If
696
* U_READWRITE, the "Read" transliteration will be in the inverse
698
* @param status ICU error code.
699
* @return The previously set transliterator, owned by the
700
* caller. If U_READWRITE is specified, only the WRITE transliterator
701
* is returned. In most cases, the caller should call utrans_close()
702
* on the result of this function.
705
U_STABLE UTransliterator* U_EXPORT2
706
u_fsettransliterator(UFILE *file, UFileDirection direction,
707
UTransliterator *adopt, UErrorCode *status);
712
/* Output string functions */
713
#if !UCONFIG_NO_FORMATTING
717
* Write formatted data to a Unicode string.
719
* @param buffer The Unicode String to which to write.
720
* @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will
721
* interpret the variable arguments received and format the data.
722
* @return The number of Unicode code units written to <TT>buffer</TT>. This
723
* does not include the terminating null character.
726
U_STABLE int32_t U_EXPORT2
727
u_sprintf(UChar *buffer,
728
const char *patternSpecification,
732
* Write formatted data to a Unicode string. When the number of code units
733
* required to store the data exceeds <TT>count</TT>, then <TT>count</TT> code
734
* units of data are stored in <TT>buffer</TT> and a negative value is
735
* returned. When the number of code units required to store the data equals
736
* <TT>count</TT>, the string is not null terminated and <TT>count</TT> is
739
* @param buffer The Unicode String to which to write.
740
* @param count The number of code units to read.
741
* @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will
742
* interpret the variable arguments received and format the data.
743
* @return The number of Unicode characters that would have been written to
744
* <TT>buffer</TT> had count been sufficiently large. This does not include
745
* the terminating null character.
748
U_STABLE int32_t U_EXPORT2
749
u_snprintf(UChar *buffer,
751
const char *patternSpecification,
755
* Write formatted data to a Unicode string.
756
* This is identical to <TT>u_sprintf</TT>, except that it will
757
* <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>.
759
* @param buffer The Unicode string to which to write.
760
* @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will
761
* interpret the variable arguments received and format the data.
762
* @param ap The argument list to use.
763
* @return The number of Unicode characters written to <TT>buffer</TT>.
767
U_STABLE int32_t U_EXPORT2
768
u_vsprintf(UChar *buffer,
769
const char *patternSpecification,
773
* Write formatted data to a Unicode string.
774
* This is identical to <TT>u_snprintf</TT>, except that it will
775
* <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>.<br><br>
776
* When the number of code units required to store the data exceeds
777
* <TT>count</TT>, then <TT>count</TT> code units of data are stored in
778
* <TT>buffer</TT> and a negative value is returned. When the number of code
779
* units required to store the data equals <TT>count</TT>, the string is not
780
* null terminated and <TT>count</TT> is returned.
782
* @param buffer The Unicode string to which to write.
783
* @param count The number of code units to read.
784
* @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will
785
* interpret the variable arguments received and format the data.
786
* @param ap The argument list to use.
787
* @return The number of Unicode characters that would have been written to
788
* <TT>buffer</TT> had count been sufficiently large.
792
U_STABLE int32_t U_EXPORT2
793
u_vsnprintf(UChar *buffer,
795
const char *patternSpecification,
799
* Write formatted data to a Unicode string.
801
* @param buffer The Unicode string to which to write.
802
* @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will
803
* interpret the variable arguments received and format the data.
804
* @return The number of Unicode characters written to <TT>buffer</TT>.
807
U_STABLE int32_t U_EXPORT2
808
u_sprintf_u(UChar *buffer,
809
const UChar *patternSpecification,
813
* Write formatted data to a Unicode string. When the number of code units
814
* required to store the data exceeds <TT>count</TT>, then <TT>count</TT> code
815
* units of data are stored in <TT>buffer</TT> and a negative value is
816
* returned. When the number of code units required to store the data equals
817
* <TT>count</TT>, the string is not null terminated and <TT>count</TT> is
820
* @param buffer The Unicode string to which to write.
821
* @param count The number of code units to read.
822
* @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will
823
* interpret the variable arguments received and format the data.
824
* @return The number of Unicode characters that would have been written to
825
* <TT>buffer</TT> had count been sufficiently large.
828
U_STABLE int32_t U_EXPORT2
829
u_snprintf_u(UChar *buffer,
831
const UChar *patternSpecification,
835
* Write formatted data to a Unicode string.
836
* This is identical to <TT>u_sprintf_u</TT>, except that it will
837
* <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>.
839
* @param buffer The Unicode string to which to write.
840
* @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will
841
* interpret the variable arguments received and format the data.
842
* @param ap The argument list to use.
843
* @return The number of Unicode characters written to <TT>f</TT>.
847
U_STABLE int32_t U_EXPORT2
848
u_vsprintf_u(UChar *buffer,
849
const UChar *patternSpecification,
853
* Write formatted data to a Unicode string.
854
* This is identical to <TT>u_snprintf_u</TT>, except that it will
855
* <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>.
856
* When the number of code units required to store the data exceeds
857
* <TT>count</TT>, then <TT>count</TT> code units of data are stored in
858
* <TT>buffer</TT> and a negative value is returned. When the number of code
859
* units required to store the data equals <TT>count</TT>, the string is not
860
* null terminated and <TT>count</TT> is returned.
862
* @param buffer The Unicode string to which to write.
863
* @param count The number of code units to read.
864
* @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will
865
* interpret the variable arguments received and format the data.
866
* @param ap The argument list to use.
867
* @return The number of Unicode characters that would have been written to
868
* <TT>f</TT> had count been sufficiently large.
872
U_STABLE int32_t U_EXPORT2
873
u_vsnprintf_u(UChar *buffer,
875
const UChar *patternSpecification,
878
/* Input string functions */
881
* Read formatted data from a Unicode string.
883
* @param buffer The Unicode string from which to read.
884
* @param patternSpecification A pattern specifying how <TT>u_sscanf</TT> will
885
* interpret the variable arguments received and parse the data.
886
* @return The number of items successfully converted and assigned, or EOF
887
* if an error occurred.
890
U_STABLE int32_t U_EXPORT2
891
u_sscanf(const UChar *buffer,
892
const char *patternSpecification,
896
* Read formatted data from a Unicode string.
897
* This is identical to <TT>u_sscanf</TT>, except that it will
898
* <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>.
900
* @param buffer The Unicode string from which to read.
901
* @param patternSpecification A pattern specifying how <TT>u_sscanf</TT> will
902
* interpret the variable arguments received and parse the data.
903
* @param ap The argument list to use.
904
* @return The number of items successfully converted and assigned, or EOF
905
* if an error occurred.
909
U_STABLE int32_t U_EXPORT2
910
u_vsscanf(const UChar *buffer,
911
const char *patternSpecification,
915
* Read formatted data from a Unicode string.
917
* @param buffer The Unicode string from which to read.
918
* @param patternSpecification A pattern specifying how <TT>u_sscanf</TT> will
919
* interpret the variable arguments received and parse the data.
920
* @return The number of items successfully converted and assigned, or EOF
921
* if an error occurred.
924
U_STABLE int32_t U_EXPORT2
925
u_sscanf_u(const UChar *buffer,
926
const UChar *patternSpecification,
930
* Read formatted data from a Unicode string.
931
* This is identical to <TT>u_sscanf_u</TT>, except that it will
932
* <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>.
934
* @param buffer The Unicode string from which to read.
935
* @param patternSpecification A pattern specifying how <TT>u_sscanf</TT> will
936
* interpret the variable arguments received and parse the data.
937
* @param ap The argument list to use.
938
* @return The number of items successfully converted and assigned, or EOF
939
* if an error occurred.
943
U_STABLE int32_t U_EXPORT2
944
u_vsscanf_u(const UChar *buffer,
945
const UChar *patternSpecification,