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diff --git a/intl/icu/source/io/unicode/ustdio.h b/intl/icu/source/io/unicode/ustdio.h new file mode 100644 index 0000000000..5aad6b9bbe --- /dev/null +++ b/intl/icu/source/io/unicode/ustdio.h @@ -0,0 +1,1021 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +****************************************************************************** +* +* Copyright (C) 1998-2015, International Business Machines +* Corporation and others. All Rights Reserved. +* +****************************************************************************** +* +* File ustdio.h +* +* Modification History: +* +* Date Name Description +* 10/16/98 stephen Creation. +* 11/06/98 stephen Modified per code review. +* 03/12/99 stephen Modified for new C API. +* 07/19/99 stephen Minor doc update. +* 02/01/01 george Added sprintf & sscanf with all of its variants +****************************************************************************** +*/ + +#ifndef USTDIO_H +#define USTDIO_H + +#include <stdio.h> +#include <stdarg.h> + +#include "unicode/utypes.h" +#include "unicode/ucnv.h" +#include "unicode/utrans.h" +#include "unicode/unum.h" + +#if U_SHOW_CPLUSPLUS_API +#include "unicode/localpointer.h" +#endif // U_SHOW_CPLUSPLUS_API + +#if !UCONFIG_NO_CONVERSION + +/* + TODO + The following is a small list as to what is currently wrong/suggestions for + ustdio. + + * Make sure that * in the scanf format specification works for all formats. + * Each UFILE takes up at least 2KB. + Look into adding setvbuf() for configurable buffers. + * This library does buffering. The OS should do this for us already. Check on + this, and remove it from this library, if this is the case. Double buffering + wastes a lot of time and space. + * Test stdin and stdout with the u_f* functions + * Testing should be done for reading and writing multi-byte encodings, + and make sure that a character that is contained across buffer boundaries + works even for incomplete characters. + * Make sure that the last character is flushed when the file/string is closed. + * snprintf should follow the C99 standard for the return value, which is + return the number of characters (excluding the trailing '\0') + which would have been written to the destination string regardless + of available space. This is like pre-flighting. + * Everything that uses %s should do what operator>> does for UnicodeString. + It should convert one byte at a time, and once a character is + converted then check to see if it's whitespace or in the scanset. + If it's whitespace or in the scanset, put all the bytes back (do nothing + for sprintf/sscanf). + * If bad string data is encountered, make sure that the function fails + without memory leaks and the unconvertable characters are valid + substitution or are escaped characters. + * u_fungetc() can't unget a character when it's at the beginning of the + internal conversion buffer. For example, read the buffer size # of + characters, and then ungetc to get the previous character that was + at the end of the last buffer. + * u_fflush() and u_fclose should return an int32_t like C99 functions. + 0 is returned if the operation was successful and EOF otherwise. + * u_fsettransliterator does not support U_READ side of transliteration. + * The format specifier should limit the size of a format or honor it in + order to prevent buffer overruns. (e.g. %256.256d). + * u_fread and u_fwrite don't exist. They're needed for reading and writing + data structures without any conversion. + * u_file_read and u_file_write are used for writing strings. u_fgets and + u_fputs or u_fread and u_fwrite should be used to do this. + * The width parameter for all scanf formats, including scanset, needs + better testing. This prevents buffer overflows. + * Figure out what is suppose to happen when a codepage is changed midstream. + Maybe a flush or a rewind are good enough. + * Make sure that a UFile opened with "rw" can be used after using + u_fflush with a u_frewind. + * scanf(%i) should detect what type of number to use. + * Add more testing of the alternate format, %# + * Look at newline handling of fputs/puts + * Think more about codeunit/codepoint error handling/support in %S,%s,%C,%c,%[] + * Complete the file documentation with proper doxygen formatting. + See http://oss.software.ibm.com/pipermail/icu/2003-July/005647.html +*/ + +/** + * \file + * \brief C API: Unicode stdio-like API + * + * <h2>Unicode stdio-like C API</h2> + * + * <p>This API provides an stdio-like API wrapper around ICU's other + * formatting and parsing APIs. It is meant to ease the transition of adding + * Unicode support to a preexisting applications using stdio. The following + * is a small list of noticeable differences between stdio and ICU I/O's + * ustdio implementation.</p> + * + * <ul> + * <li>Locale specific formatting and parsing is only done with file IO.</li> + * <li>u_fstropen can be used to simulate file IO with strings. + * This is similar to the iostream API, and it allows locale specific + * formatting and parsing to be used.</li> + * <li>This API provides uniform formatting and parsing behavior between + * platforms (unlike the standard stdio implementations found on various + * platforms).</li> + * <li>This API is better suited for text data handling than binary data + * handling when compared to the typical stdio implementation.</li> + * <li>You can specify a Transliterator while using the file IO.</li> + * <li>You can specify a file's codepage separately from the default + * system codepage.</li> + * </ul> + * + * <h2>Formatting and Parsing Specification</h2> + * + * General printf format:<br> + * %[format modifier][width][.precision][type modifier][format] + * + * General scanf format:<br> + * %[*][format modifier][width][type modifier][format] + * +<table cellspacing="3"> +<tr><td>format</td><td>default<br>printf<br>type</td><td>default<br>scanf<br>type</td><td>description</td></tr> +<tr><td>%E</td><td>double</td><td>float</td><td>Scientific with an uppercase exponent</td></tr> +<tr><td>%e</td><td>double</td><td>float</td><td>Scientific with a lowercase exponent</td></tr> +<tr><td>%G</td><td>double</td><td>float</td><td>Use %E or %f for best format</td></tr> +<tr><td>%g</td><td>double</td><td>float</td><td>Use %e or %f for best format</td></tr> +<tr><td>%f</td><td>double</td><td>float</td><td>Simple floating point without the exponent</td></tr> +<tr><td>%X</td><td>int32_t</td><td>int32_t</td><td>ustdio special uppercase hex radix formatting</td></tr> +<tr><td>%x</td><td>int32_t</td><td>int32_t</td><td>ustdio special lowercase hex radix formatting</td></tr> +<tr><td>%d</td><td>int32_t</td><td>int32_t</td><td>Decimal format</td></tr> +<tr><td>%i</td><td>int32_t</td><td>int32_t</td><td>Same as %d</td></tr> +<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> +<tr><td>%o</td><td>int32_t</td><td>int32_t</td><td>ustdio special octal radix formatting</td></tr> +<tr><td>%u</td><td>uint32_t</td><td>uint32_t</td><td>Decimal format</td></tr> +<tr><td>%p</td><td>void *</td><td>void *</td><td>Prints the pointer value</td></tr> +<tr><td>%s</td><td>char *</td><td>char *</td><td>Use default converter or specified converter from fopen</td></tr> +<tr><td>%c</td><td>char</td><td>char</td><td>Use default converter or specified converter from fopen<br> +When width is specified for scanf, this acts like a non-NULL-terminated char * string.<br> +By default, only one char is written.</td></tr> +<tr><td>%S</td><td>UChar *</td><td>UChar *</td><td>Null terminated UTF-16 string</td></tr> +<tr><td>%C</td><td>UChar</td><td>UChar</td><td>16-bit Unicode code unit<br> +When width is specified for scanf, this acts like a non-NULL-terminated UChar * string<br> +By default, only one codepoint is written.</td></tr> +<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> +<tr><td>%%</td><td> </td><td> </td><td>Show a percent sign</td></tr> +</table> + +Format modifiers +<table> +<tr><td>modifier</td><td>formats</td><td>type</td><td>comments</td></tr> +<tr><td>%h</td><td>%d, %i, %o, %x</td><td>int16_t</td><td>short format</td></tr> +<tr><td>%h</td><td>%u</td><td>uint16_t</td><td>short format</td></tr> +<tr><td>%h</td><td>c</td><td>char</td><td><b>(Unimplemented)</b> Use invariant converter</td></tr> +<tr><td>%h</td><td>s</td><td>char *</td><td><b>(Unimplemented)</b> Use invariant converter</td></tr> +<tr><td>%h</td><td>C</td><td>char</td><td><b>(Unimplemented)</b> 8-bit Unicode code unit</td></tr> +<tr><td>%h</td><td>S</td><td>char *</td><td><b>(Unimplemented)</b> Null terminated UTF-8 string</td></tr> +<tr><td>%l</td><td>%d, %i, %o, %x</td><td>int32_t</td><td>long format (no effect)</td></tr> +<tr><td>%l</td><td>%u</td><td>uint32_t</td><td>long format (no effect)</td></tr> +<tr><td>%l</td><td>c</td><td>N/A</td><td><b>(Unimplemented)</b> Reserved for future implementation</td></tr> +<tr><td>%l</td><td>s</td><td>N/A</td><td><b>(Unimplemented)</b> Reserved for future implementation</td></tr> +<tr><td>%l</td><td>C</td><td>UChar32</td><td><b>(Unimplemented)</b> 32-bit Unicode code unit</td></tr> +<tr><td>%l</td><td>S</td><td>UChar32 *</td><td><b>(Unimplemented)</b> Null terminated UTF-32 string</td></tr> +<tr><td>%ll</td><td>%d, %i, %o, %x</td><td>int64_t</td><td>long long format</td></tr> +<tr><td>%ll</td><td>%u</td><td>uint64_t</td><td><b>(Unimplemented)</b> long long format</td></tr> +<tr><td>%-</td><td><i>all</i></td><td>N/A</td><td>Left justify</td></tr> +<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> +<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> +<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 + decimal point for floats.</td></tr> +<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 + some large number.</td></tr> +<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 + 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> +</table> + +printf modifier +%* int32_t Next argument after this one specifies the width + +scanf modifier +%* N/A This field is scanned, but not stored + +<p>If you are using this C API instead of the ustream.h API for C++, +you can use one of the following u_fprintf examples to display a UnicodeString.</p> + +<pre><code> + UFILE *out = u_finit(stdout, NULL, NULL); + UnicodeString string1("string 1"); + UnicodeString string2("string 2"); + u_fprintf(out, "%S\n", string1.getTerminatedBuffer()); + u_fprintf(out, "%.*S\n", string2.length(), string2.getBuffer()); + u_fclose(out); +</code></pre> + + */ + + +/** + * When an end of file is encountered, this value can be returned. + * @see u_fgetc + * @stable 3.0 + */ +#define U_EOF 0xFFFF + +/** Forward declaration of a Unicode-aware file @stable 3.0 */ +typedef struct UFILE UFILE; + +/** + * Enum for which direction of stream a transliterator applies to. + * @see u_fsettransliterator + * @stable ICU 3.0 + */ +typedef enum { + U_READ = 1, + U_WRITE = 2, + U_READWRITE =3 /* == (U_READ | U_WRITE) */ +} UFileDirection; + +/** + * Open a UFILE. + * A UFILE is a wrapper around a FILE* that is locale and codepage aware. + * That is, data written to a UFILE will be formatted using the conventions + * specified by that UFILE's Locale; this data will be in the character set + * specified by that UFILE's codepage. + * @param filename The name of the file to open. Must be 0-terminated. + * @param perm The read/write permission for the UFILE; one of "r", "w", "rw" + * @param locale The locale whose conventions will be used to format + * and parse output. If this parameter is NULL, the default locale will + * be used. + * @param codepage The codepage in which data will be written to and + * read from the file. If this parameter is NULL the system default codepage + * will be used. + * @return A new UFILE, or NULL if an error occurred. + * @stable ICU 3.0 + */ +U_CAPI UFILE* U_EXPORT2 +u_fopen(const char *filename, + const char *perm, + const char *locale, + const char *codepage); + +/** + * Open a UFILE with a UChar* filename + * A UFILE is a wrapper around a FILE* that is locale and codepage aware. + * That is, data written to a UFILE will be formatted using the conventions + * specified by that UFILE's Locale; this data will be in the character set + * specified by that UFILE's codepage. + * @param filename The name of the file to open. Must be 0-terminated. + * @param perm The read/write permission for the UFILE; one of "r", "w", "rw" + * @param locale The locale whose conventions will be used to format + * and parse output. If this parameter is NULL, the default locale will + * be used. + * @param codepage The codepage in which data will be written to and + * read from the file. If this parameter is NULL the system default codepage + * will be used. + * @return A new UFILE, or NULL if an error occurred. + * @stable ICU 54 + */ +U_CAPI UFILE* U_EXPORT2 +u_fopen_u(const UChar *filename, + const char *perm, + const char *locale, + const char *codepage); + +/** + * Open a UFILE on top of an existing FILE* stream. The FILE* stream + * ownership remains with the caller. To have the UFILE take over + * ownership and responsibility for the FILE* stream, use the + * function u_fadopt. + * @param f The FILE* to which this UFILE will attach and use. + * @param locale The locale whose conventions will be used to format + * and parse output. If this parameter is NULL, the default locale will + * be used. + * @param codepage The codepage in which data will be written to and + * read from the file. If this parameter is NULL, data will be written and + * read using the default codepage for <TT>locale</TT>, unless <TT>locale</TT> + * is NULL, in which case the system default codepage will be used. + * @return A new UFILE, or NULL if an error occurred. + * @stable ICU 3.0 + */ +U_CAPI UFILE* U_EXPORT2 +u_finit(FILE *f, + const char *locale, + const char *codepage); + +/** + * Open a UFILE on top of an existing FILE* stream. The FILE* stream + * ownership is transferred to the new UFILE. It will be closed when the + * UFILE is closed. + * @param f The FILE* which this UFILE will take ownership of. + * @param locale The locale whose conventions will be used to format + * and parse output. If this parameter is NULL, the default locale will + * be used. + * @param codepage The codepage in which data will be written to and + * read from the file. If this parameter is NULL, data will be written and + * read using the default codepage for <TT>locale</TT>, unless <TT>locale</TT> + * is NULL, in which case the system default codepage will be used. + * @return A new UFILE, or NULL if an error occurred. If an error occurs + * the ownership of the FILE* stream remains with the caller. + * @stable ICU 4.4 + */ +U_CAPI UFILE* U_EXPORT2 +u_fadopt(FILE *f, + const char *locale, + const char *codepage); + +/** + * Create a UFILE that can be used for localized formatting or parsing. + * The u_sprintf and u_sscanf functions do not read or write numbers for a + * specific locale. The ustdio.h file functions can be used on this UFILE. + * The string is usable once u_fclose or u_fflush has been called on the + * returned UFILE. + * @param stringBuf The string used for reading or writing. + * @param capacity The number of code units available for use in stringBuf + * @param locale The locale whose conventions will be used to format + * and parse output. If this parameter is NULL, the default locale will + * be used. + * @return A new UFILE, or NULL if an error occurred. + * @stable ICU 3.0 + */ +U_CAPI UFILE* U_EXPORT2 +u_fstropen(UChar *stringBuf, + int32_t capacity, + const char *locale); + +/** + * Close a UFILE. Implies u_fflush first. + * @param file The UFILE to close. + * @stable ICU 3.0 + * @see u_fflush + */ +U_CAPI void U_EXPORT2 +u_fclose(UFILE *file); + +#if U_SHOW_CPLUSPLUS_API + +U_NAMESPACE_BEGIN + +/** + * \class LocalUFILEPointer + * "Smart pointer" class, closes a UFILE via u_fclose(). + * For most methods see the LocalPointerBase base class. + * + * @see LocalPointerBase + * @see LocalPointer + * @stable ICU 4.4 + */ +U_DEFINE_LOCAL_OPEN_POINTER(LocalUFILEPointer, UFILE, u_fclose); + +U_NAMESPACE_END + +#endif + +/** + * Tests if the UFILE is at the end of the file stream. + * @param f The UFILE from which to read. + * @return Returns true after the first read operation that attempts to + * read past the end of the file. It returns false if the current position is + * not end of file. + * @stable ICU 3.0 +*/ +U_CAPI UBool U_EXPORT2 +u_feof(UFILE *f); + +/** + * Flush output of a UFILE. Implies a flush of + * converter/transliterator state. (That is, a logical break is + * made in the output stream - for example if a different type of + * output is desired.) The underlying OS level file is also flushed. + * Note that for a stateful encoding, the converter may write additional + * bytes to return the stream to default state. + * @param file The UFILE to flush. + * @stable ICU 3.0 + */ +U_CAPI void U_EXPORT2 +u_fflush(UFILE *file); + +/** + * Rewind the file pointer to the beginning of the file. + * @param file The UFILE to rewind. + * @stable ICU 3.0 + */ +U_CAPI void +u_frewind(UFILE *file); + +/** + * Get the FILE* associated with a UFILE. + * @param f The UFILE + * @return A FILE*, owned by the UFILE. (The FILE <EM>must not</EM> be modified or closed) + * @stable ICU 3.0 + */ +U_CAPI FILE* U_EXPORT2 +u_fgetfile(UFILE *f); + +#if !UCONFIG_NO_FORMATTING + +/** + * Get the locale whose conventions are used to format and parse output. + * This is the same locale passed in the preceding call to<TT>u_fsetlocale</TT> + * or <TT>u_fopen</TT>. + * @param file The UFILE to set. + * @return The locale whose conventions are used to format and parse output. + * @stable ICU 3.0 + */ +U_CAPI const char* U_EXPORT2 +u_fgetlocale(UFILE *file); + +/** + * Set the locale whose conventions will be used to format and parse output. + * @param locale The locale whose conventions will be used to format + * and parse output. + * @param file The UFILE to query. + * @return NULL if successful, otherwise a negative number. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_fsetlocale(UFILE *file, + const char *locale); + +#endif + +/** + * Get the codepage in which data is written to and read from the UFILE. + * This is the same codepage passed in the preceding call to + * <TT>u_fsetcodepage</TT> or <TT>u_fopen</TT>. + * @param file The UFILE to query. + * @return The codepage in which data is written to and read from the UFILE, + * or NULL if an error occurred. + * @stable ICU 3.0 + */ +U_CAPI const char* U_EXPORT2 +u_fgetcodepage(UFILE *file); + +/** + * Set the codepage in which data will be written to and read from the UFILE. + * All Unicode data written to the UFILE will be converted to this codepage + * before it is written to the underlying FILE*. It it generally a bad idea to + * mix codepages within a file. This should only be called right + * after opening the <TT>UFile</TT>, or after calling <TT>u_frewind</TT>. + * @param codepage The codepage in which data will be written to + * and read from the file. For example <TT>"latin-1"</TT> or <TT>"ibm-943"</TT>. + * A value of NULL means the default codepage for the UFILE's current + * locale will be used. + * @param file The UFILE to set. + * @return 0 if successful, otherwise a negative number. + * @see u_frewind + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_fsetcodepage(const char *codepage, + UFILE *file); + + +/** + * Returns an alias to the converter being used for this file. + * @param f The UFILE to get the value from + * @return alias to the converter (The converter <EM>must not</EM> be modified or closed) + * @stable ICU 3.0 + */ +U_CAPI UConverter* U_EXPORT2 u_fgetConverter(UFILE *f); + +#if !UCONFIG_NO_FORMATTING +/** + * Returns an alias to the number formatter being used for this file. + * @param f The UFILE to get the value from + * @return alias to the number formatter (The formatter <EM>must not</EM> be modified or closed) + * @stable ICU 51 +*/ + U_CAPI const UNumberFormat* U_EXPORT2 u_fgetNumberFormat(UFILE *f); + +/* Output functions */ + +/** + * Write formatted data to <TT>stdout</TT>. + * @param patternSpecification A pattern specifying how <TT>u_printf</TT> will + * interpret the variable arguments received and format the data. + * @return The number of Unicode characters written to <TT>stdout</TT> + * @stable ICU 49 + */ +U_CAPI int32_t U_EXPORT2 +u_printf(const char *patternSpecification, + ... ); + +/** + * Write formatted data to a UFILE. + * @param f The UFILE to which to write. + * @param patternSpecification A pattern specifying how <TT>u_fprintf</TT> will + * interpret the variable arguments received and format the data. + * @return The number of Unicode characters written to <TT>f</TT>. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_fprintf(UFILE *f, + const char *patternSpecification, + ... ); + +/** + * Write formatted data to a UFILE. + * This is identical to <TT>u_fprintf</TT>, except that it will + * <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>. + * @param f The UFILE to which to write. + * @param patternSpecification A pattern specifying how <TT>u_fprintf</TT> will + * interpret the variable arguments received and format the data. + * @param ap The argument list to use. + * @return The number of Unicode characters written to <TT>f</TT>. + * @see u_fprintf + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_vfprintf(UFILE *f, + const char *patternSpecification, + va_list ap); + +/** + * Write formatted data to <TT>stdout</TT>. + * @param patternSpecification A pattern specifying how <TT>u_printf_u</TT> will + * interpret the variable arguments received and format the data. + * @return The number of Unicode characters written to <TT>stdout</TT> + * @stable ICU 49 + */ +U_CAPI int32_t U_EXPORT2 +u_printf_u(const UChar *patternSpecification, + ... ); + +/** + * Get a UFILE for <TT>stdout</TT>. + * @return UFILE that writes to <TT>stdout</TT> + * @stable ICU 49 + */ +U_CAPI UFILE * U_EXPORT2 +u_get_stdout(void); + +/** + * Write formatted data to a UFILE. + * @param f The UFILE to which to write. + * @param patternSpecification A pattern specifying how <TT>u_fprintf</TT> will + * interpret the variable arguments received and format the data. + * @return The number of Unicode characters written to <TT>f</TT>. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_fprintf_u(UFILE *f, + const UChar *patternSpecification, + ... ); + +/** + * Write formatted data to a UFILE. + * This is identical to <TT>u_fprintf_u</TT>, except that it will + * <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>. + * @param f The UFILE to which to write. + * @param patternSpecification A pattern specifying how <TT>u_fprintf</TT> will + * interpret the variable arguments received and format the data. + * @param ap The argument list to use. + * @return The number of Unicode characters written to <TT>f</TT>. + * @see u_fprintf_u + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_vfprintf_u(UFILE *f, + const UChar *patternSpecification, + va_list ap); +#endif +/** + * Write a Unicode to a UFILE. The null (U+0000) terminated UChar* + * <TT>s</TT> will be written to <TT>f</TT>, excluding the NULL terminator. + * A newline will be added to <TT>f</TT>. + * @param s The UChar* to write. + * @param f The UFILE to which to write. + * @return A non-negative number if successful, EOF otherwise. + * @see u_file_write + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_fputs(const UChar *s, + UFILE *f); + +/** + * Write a UChar to a UFILE. + * @param uc The UChar to write. + * @param f The UFILE to which to write. + * @return The character written if successful, EOF otherwise. + * @stable ICU 3.0 + */ +U_CAPI UChar32 U_EXPORT2 +u_fputc(UChar32 uc, + UFILE *f); + +/** + * Write Unicode to a UFILE. + * The ustring passed in will be converted to the UFILE's underlying + * codepage before it is written. + * @param ustring A pointer to the Unicode data to write. + * @param count The number of Unicode characters to write + * @param f The UFILE to which to write. + * @return The number of Unicode characters written. + * @see u_fputs + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_file_write(const UChar *ustring, + int32_t count, + UFILE *f); + + +/* Input functions */ +#if !UCONFIG_NO_FORMATTING + +/** + * Read formatted data from a UFILE. + * @param f The UFILE from which to read. + * @param patternSpecification A pattern specifying how <TT>u_fscanf</TT> will + * interpret the variable arguments received and parse the data. + * @return The number of items successfully converted and assigned, or EOF + * if an error occurred. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_fscanf(UFILE *f, + const char *patternSpecification, + ... ); + +/** + * Read formatted data from a UFILE. + * This is identical to <TT>u_fscanf</TT>, except that it will + * <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>. + * @param f The UFILE from which to read. + * @param patternSpecification A pattern specifying how <TT>u_fscanf</TT> will + * interpret the variable arguments received and parse the data. + * @param ap The argument list to use. + * @return The number of items successfully converted and assigned, or EOF + * if an error occurred. + * @see u_fscanf + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_vfscanf(UFILE *f, + const char *patternSpecification, + va_list ap); + +/** + * Read formatted data from a UFILE. + * @param f The UFILE from which to read. + * @param patternSpecification A pattern specifying how <TT>u_fscanf</TT> will + * interpret the variable arguments received and parse the data. + * @return The number of items successfully converted and assigned, or EOF + * if an error occurred. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_fscanf_u(UFILE *f, + const UChar *patternSpecification, + ... ); + +/** + * Read formatted data from a UFILE. + * This is identical to <TT>u_fscanf_u</TT>, except that it will + * <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>. + * @param f The UFILE from which to read. + * @param patternSpecification A pattern specifying how <TT>u_fscanf</TT> will + * interpret the variable arguments received and parse the data. + * @param ap The argument list to use. + * @return The number of items successfully converted and assigned, or EOF + * if an error occurred. + * @see u_fscanf_u + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_vfscanf_u(UFILE *f, + const UChar *patternSpecification, + va_list ap); +#endif + +/** + * Read one line of text into a UChar* string from a UFILE. The newline + * at the end of the line is read into the string. The string is always + * null terminated + * @param f The UFILE from which to read. + * @param n The maximum number of characters - 1 to read. + * @param s The UChar* to receive the read data. Characters will be + * stored successively in <TT>s</TT> until a newline or EOF is + * reached. A null character (U+0000) will be appended to <TT>s</TT>. + * @return A pointer to <TT>s</TT>, or NULL if no characters were available. + * @stable ICU 3.0 + */ +U_CAPI UChar* U_EXPORT2 +u_fgets(UChar *s, + int32_t n, + UFILE *f); + +/** + * Read a UChar from a UFILE. It is recommended that <TT>u_fgetcx</TT> + * used instead for proper parsing functions, but sometimes reading + * code units is needed instead of codepoints. + * + * @param f The UFILE from which to read. + * @return The UChar value read, or U+FFFF if no character was available. + * @stable ICU 3.0 + */ +U_CAPI UChar U_EXPORT2 +u_fgetc(UFILE *f); + +/** + * Read a UChar32 from a UFILE. + * + * @param f The UFILE from which to read. + * @return The UChar32 value read, or U_EOF if no character was + * available, or U+FFFFFFFF if an ill-formed character was + * encountered. + * @see u_unescape() + * @stable ICU 3.0 + */ +U_CAPI UChar32 U_EXPORT2 +u_fgetcx(UFILE *f); + +/** + * Unget a UChar from a UFILE. + * If this function is not the first to operate on <TT>f</TT> after a call + * to <TT>u_fgetc</TT>, the results are undefined. + * If this function is passed a character that was not received from the + * previous <TT>u_fgetc</TT> or <TT>u_fgetcx</TT> call, the results are undefined. + * @param c The UChar to put back on the stream. + * @param f The UFILE to receive <TT>c</TT>. + * @return The UChar32 value put back if successful, U_EOF otherwise. + * @stable ICU 3.0 + */ +U_CAPI UChar32 U_EXPORT2 +u_fungetc(UChar32 c, + UFILE *f); + +/** + * Read Unicode from a UFILE. + * Bytes will be converted from the UFILE's underlying codepage, with + * subsequent conversion to Unicode. The data will not be NULL terminated. + * @param chars A pointer to receive the Unicode data. + * @param count The number of Unicode characters to read. + * @param f The UFILE from which to read. + * @return The number of Unicode characters read. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_file_read(UChar *chars, + int32_t count, + UFILE *f); + +#if !UCONFIG_NO_TRANSLITERATION + +/** + * Set a transliterator on the UFILE. The transliterator will be owned by the + * UFILE. + * @param file The UFILE to set transliteration on + * @param adopt The UTransliterator to set. Can be NULL, which will + * mean that no transliteration is used. + * @param direction either U_READ, U_WRITE, or U_READWRITE - sets + * which direction the transliterator is to be applied to. If + * U_READWRITE, the "Read" transliteration will be in the inverse + * direction. + * @param status ICU error code. + * @return The previously set transliterator, owned by the + * caller. If U_READWRITE is specified, only the WRITE transliterator + * is returned. In most cases, the caller should call utrans_close() + * on the result of this function. + * @stable ICU 3.0 + */ +U_CAPI UTransliterator* U_EXPORT2 +u_fsettransliterator(UFILE *file, UFileDirection direction, + UTransliterator *adopt, UErrorCode *status); + +#endif + + +/* Output string functions */ +#if !UCONFIG_NO_FORMATTING + + +/** + * Write formatted data to a Unicode string. + * + * @param buffer The Unicode String to which to write. + * @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will + * interpret the variable arguments received and format the data. + * @return The number of Unicode code units written to <TT>buffer</TT>. This + * does not include the terminating null character. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_sprintf(UChar *buffer, + const char *patternSpecification, + ... ); + +/** + * Write formatted data to a Unicode string. When the number of code units + * required to store the data exceeds <TT>count</TT>, then <TT>count</TT> code + * units of data are stored in <TT>buffer</TT> and a negative value is + * returned. When the number of code units required to store the data equals + * <TT>count</TT>, the string is not null terminated and <TT>count</TT> is + * returned. + * + * @param buffer The Unicode String to which to write. + * @param count The number of code units to read. + * @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will + * interpret the variable arguments received and format the data. + * @return The number of Unicode characters that would have been written to + * <TT>buffer</TT> had count been sufficiently large. This does not include + * the terminating null character. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_snprintf(UChar *buffer, + int32_t count, + const char *patternSpecification, + ... ); + +/** + * Write formatted data to a Unicode string. + * This is identical to <TT>u_sprintf</TT>, except that it will + * <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>. + * + * @param buffer The Unicode string to which to write. + * @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will + * interpret the variable arguments received and format the data. + * @param ap The argument list to use. + * @return The number of Unicode characters written to <TT>buffer</TT>. + * @see u_sprintf + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_vsprintf(UChar *buffer, + const char *patternSpecification, + va_list ap); + +/** + * Write formatted data to a Unicode string. + * This is identical to <TT>u_snprintf</TT>, except that it will + * <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>.<br><br> + * When the number of code units required to store the data exceeds + * <TT>count</TT>, then <TT>count</TT> code units of data are stored in + * <TT>buffer</TT> and a negative value is returned. When the number of code + * units required to store the data equals <TT>count</TT>, the string is not + * null terminated and <TT>count</TT> is returned. + * + * @param buffer The Unicode string to which to write. + * @param count The number of code units to read. + * @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will + * interpret the variable arguments received and format the data. + * @param ap The argument list to use. + * @return The number of Unicode characters that would have been written to + * <TT>buffer</TT> had count been sufficiently large. + * @see u_sprintf + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_vsnprintf(UChar *buffer, + int32_t count, + const char *patternSpecification, + va_list ap); + +/** + * Write formatted data to a Unicode string. + * + * @param buffer The Unicode string to which to write. + * @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will + * interpret the variable arguments received and format the data. + * @return The number of Unicode characters written to <TT>buffer</TT>. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_sprintf_u(UChar *buffer, + const UChar *patternSpecification, + ... ); + +/** + * Write formatted data to a Unicode string. When the number of code units + * required to store the data exceeds <TT>count</TT>, then <TT>count</TT> code + * units of data are stored in <TT>buffer</TT> and a negative value is + * returned. When the number of code units required to store the data equals + * <TT>count</TT>, the string is not null terminated and <TT>count</TT> is + * returned. + * + * @param buffer The Unicode string to which to write. + * @param count The number of code units to read. + * @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will + * interpret the variable arguments received and format the data. + * @return The number of Unicode characters that would have been written to + * <TT>buffer</TT> had count been sufficiently large. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_snprintf_u(UChar *buffer, + int32_t count, + const UChar *patternSpecification, + ... ); + +/** + * Write formatted data to a Unicode string. + * This is identical to <TT>u_sprintf_u</TT>, except that it will + * <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>. + * + * @param buffer The Unicode string to which to write. + * @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will + * interpret the variable arguments received and format the data. + * @param ap The argument list to use. + * @return The number of Unicode characters written to <TT>f</TT>. + * @see u_sprintf_u + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_vsprintf_u(UChar *buffer, + const UChar *patternSpecification, + va_list ap); + +/** + * Write formatted data to a Unicode string. + * This is identical to <TT>u_snprintf_u</TT>, except that it will + * <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>. + * When the number of code units required to store the data exceeds + * <TT>count</TT>, then <TT>count</TT> code units of data are stored in + * <TT>buffer</TT> and a negative value is returned. When the number of code + * units required to store the data equals <TT>count</TT>, the string is not + * null terminated and <TT>count</TT> is returned. + * + * @param buffer The Unicode string to which to write. + * @param count The number of code units to read. + * @param patternSpecification A pattern specifying how <TT>u_sprintf</TT> will + * interpret the variable arguments received and format the data. + * @param ap The argument list to use. + * @return The number of Unicode characters that would have been written to + * <TT>f</TT> had count been sufficiently large. + * @see u_sprintf_u + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_vsnprintf_u(UChar *buffer, + int32_t count, + const UChar *patternSpecification, + va_list ap); + +/* Input string functions */ + +/** + * Read formatted data from a Unicode string. + * + * @param buffer The Unicode string from which to read. + * @param patternSpecification A pattern specifying how <TT>u_sscanf</TT> will + * interpret the variable arguments received and parse the data. + * @return The number of items successfully converted and assigned, or EOF + * if an error occurred. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_sscanf(const UChar *buffer, + const char *patternSpecification, + ... ); + +/** + * Read formatted data from a Unicode string. + * This is identical to <TT>u_sscanf</TT>, except that it will + * <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>. + * + * @param buffer The Unicode string from which to read. + * @param patternSpecification A pattern specifying how <TT>u_sscanf</TT> will + * interpret the variable arguments received and parse the data. + * @param ap The argument list to use. + * @return The number of items successfully converted and assigned, or EOF + * if an error occurred. + * @see u_sscanf + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_vsscanf(const UChar *buffer, + const char *patternSpecification, + va_list ap); + +/** + * Read formatted data from a Unicode string. + * + * @param buffer The Unicode string from which to read. + * @param patternSpecification A pattern specifying how <TT>u_sscanf</TT> will + * interpret the variable arguments received and parse the data. + * @return The number of items successfully converted and assigned, or EOF + * if an error occurred. + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_sscanf_u(const UChar *buffer, + const UChar *patternSpecification, + ... ); + +/** + * Read formatted data from a Unicode string. + * This is identical to <TT>u_sscanf_u</TT>, except that it will + * <EM>not</EM> call <TT>va_start</TT> and <TT>va_end</TT>. + * + * @param buffer The Unicode string from which to read. + * @param patternSpecification A pattern specifying how <TT>u_sscanf</TT> will + * interpret the variable arguments received and parse the data. + * @param ap The argument list to use. + * @return The number of items successfully converted and assigned, or EOF + * if an error occurred. + * @see u_sscanf_u + * @stable ICU 3.0 + */ +U_CAPI int32_t U_EXPORT2 +u_vsscanf_u(const UChar *buffer, + const UChar *patternSpecification, + va_list ap); + + +#endif +#endif +#endif + + |