ICU 76.1: io/unicode/ustdio.h Source File

ICU 76.1 76.1

ustdio.h
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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) 1998-2015, International Business Machines
7 * Corporation and others. All Rights Reserved.
8 *
9 ******************************************************************************
10 *
11 * File ustdio.h
12 *
13 * Modification History:
14 *
15 * Date Name Description
16 * 10/16/98 stephen Creation.
17 * 11/06/98 stephen Modified per code review.
18 * 03/12/99 stephen Modified for new C API.
19 * 07/19/99 stephen Minor doc update.
20 * 02/01/01 george Added sprintf & sscanf with all of its variants
21 ******************************************************************************
22 */
23
24 #ifndef USTDIO_H
25 #define USTDIO_H
26
27 #include <stdio.h>
28 #include <stdarg.h>
29
30 #include "unicode/utypes.h"
31 #include "unicode/ucnv.h"
32 #include "unicode/utrans.h"
33 #include "unicode/unum.h"
34
35 #if U_SHOW_CPLUSPLUS_API
36 #include "unicode/localpointer.h"
37 #endif // U_SHOW_CPLUSPLUS_API
38
39 #if !UCONFIG_NO_CONVERSION
40
41 /*
42 TODO
43 The following is a small list as to what is currently wrong/suggestions for
44 ustdio.
45
46 * Make sure that * in the scanf format specification works for all formats.
47 * Each UFILE takes up at least 2KB.
48 Look into adding setvbuf() for configurable buffers.
49 * This library does buffering. The OS should do this for us already. Check on
50 this, and remove it from this library, if this is the case. Double buffering
51 wastes a lot of time and space.
52 * Test stdin and stdout with the u_f* functions
53 * Testing should be done for reading and writing multi-byte encodings,
54 and make sure that a character that is contained across buffer boundaries
55 works even for incomplete characters.
56 * Make sure that the last character is flushed when the file/string is closed.
57 * snprintf should follow the C99 standard for the return value, which is
58 return the number of characters (excluding the trailing '\0')
59 which would have been written to the destination string regardless
60 of available space. This is like pre-flighting.
61 * Everything that uses %s should do what operator>> does for UnicodeString.
62 It should convert one byte at a time, and once a character is
63 converted then check to see if it's whitespace or in the scanset.
64 If it's whitespace or in the scanset, put all the bytes back (do nothing
65 for sprintf/sscanf).
66 * If bad string data is encountered, make sure that the function fails
67 without memory leaks and the unconvertable characters are valid
68 substitution or are escaped characters.
69 * u_fungetc() can't unget a character when it's at the beginning of the
70 internal conversion buffer. For example, read the buffer size # of
71 characters, and then ungetc to get the previous character that was
72 at the end of the last buffer.
73 * u_fflush() and u_fclose should return an int32_t like C99 functions.
74 0 is returned if the operation was successful and EOF otherwise.
75 * u_fsettransliterator does not support U_READ side of transliteration.
76 * The format specifier should limit the size of a format or honor it in
77 order to prevent buffer overruns. (e.g. %256.256d).
78 * u_fread and u_fwrite don't exist. They're needed for reading and writing
79 data structures without any conversion.
80 * u_file_read and u_file_write are used for writing strings. u_fgets and
81 u_fputs or u_fread and u_fwrite should be used to do this.
82 * The width parameter for all scanf formats, including scanset, needs
83 better testing. This prevents buffer overflows.
84 * Figure out what is suppose to happen when a codepage is changed midstream.
85 Maybe a flush or a rewind are good enough.
86 * Make sure that a UFile opened with "rw" can be used after using
87 u_fflush with a u_frewind.
88 * scanf(%i) should detect what type of number to use.
89 * Add more testing of the alternate format, %#
90 * Look at newline handling of fputs/puts
91 * Think more about codeunit/codepoint error handling/support in %S,%s,%C,%c,%[]
92 * Complete the file documentation with proper doxygen formatting.
93 See http://oss.software.ibm.com/pipermail/icu/2003-July/005647.html
94 */
95
212 #define U_EOF 0xFFFF
213
215 typedef struct UFILE UFILE;
216
222 typedef enum {
223 U_READ = 1,
224 U_WRITE = 2,
225 U_READWRITE =3 /* == (U_READ | U_WRITE) */
226 } UFileDirection;
227
245 U_CAPI UFILE* U_EXPORT2
246 u_fopen(const char *filename,
247 const char *perm,
248 const char *locale,
249 const char *codepage);
250
268 U_CAPI UFILE* U_EXPORT2
269 u_fopen_u(const UChar *filename,
270 const char *perm,
271 const char *locale,
272 const char *codepage);
273
290 U_CAPI UFILE* U_EXPORT2
291 u_finit(FILE *f,
292 const char *locale,
293 const char *codepage);
294
311 U_CAPI UFILE* U_EXPORT2
312 u_fadopt(FILE *f,
313 const char *locale,
314 const char *codepage);
315
330 U_CAPI UFILE* U_EXPORT2
331 u_fstropen(UChar *stringBuf,
332 int32_t capacity,
333 const char *locale);
334
341 U_CAPI void U_EXPORT2
342 u_fclose(UFILE *file);
343
344 #if U_SHOW_CPLUSPLUS_API
345
346 U_NAMESPACE_BEGIN
347
357 U_DEFINE_LOCAL_OPEN_POINTER(LocalUFILEPointer, UFILE, u_fclose);
358
359 U_NAMESPACE_END
360
361 #endif
362
371 U_CAPI UBool U_EXPORT2
372 u_feof(UFILE *f);
373
384 U_CAPI void U_EXPORT2
385 u_fflush(UFILE *file);
386
392 U_CAPI void
393 u_frewind(UFILE *file);
394
401 U_CAPI FILE* U_EXPORT2
402 u_fgetfile(UFILE *f);
403
404 #if !UCONFIG_NO_FORMATTING
405
414 U_CAPI const char* U_EXPORT2
415 u_fgetlocale(UFILE *file);
416
425 U_CAPI int32_t U_EXPORT2
426 u_fsetlocale(UFILE *file,
427 const char *locale);
428
429 #endif
430
440 U_CAPI const char* U_EXPORT2
441 u_fgetcodepage(UFILE *file);
442
458 U_CAPI int32_t U_EXPORT2
459 u_fsetcodepage(const char *codepage,
460 UFILE *file);
461
462
469 U_CAPI UConverter* U_EXPORT2 u_fgetConverter(UFILE *f);
470
471 #if !UCONFIG_NO_FORMATTING
478 U_CAPI const UNumberFormat* U_EXPORT2 u_fgetNumberFormat(UFILE *f);
479
480 /* Output functions */
481
489 U_CAPI int32_t U_EXPORT2
490 u_printf(const char *patternSpecification,
491 ... );
492
501 U_CAPI int32_t U_EXPORT2
502 u_fprintf(UFILE *f,
503 const char *patternSpecification,
504 ... );
505
518 U_CAPI int32_t U_EXPORT2
519 u_vfprintf(UFILE *f,
520 const char *patternSpecification,
521 va_list ap);
522
530 U_CAPI int32_t U_EXPORT2
531 u_printf_u(const UChar *patternSpecification,
532 ... );
533
539 U_CAPI UFILE * U_EXPORT2
540 u_get_stdout(void);
541
550 U_CAPI int32_t U_EXPORT2
551 u_fprintf_u(UFILE *f,
552 const UChar *patternSpecification,
553 ... );
554
567 U_CAPI int32_t U_EXPORT2
568 u_vfprintf_u(UFILE *f,
569 const UChar *patternSpecification,
570 va_list ap);
571 #endif
582 U_CAPI int32_t U_EXPORT2
583 u_fputs(const UChar *s,
584 UFILE *f);
585
593 U_CAPI UChar32 U_EXPORT2
594 u_fputc(UChar32 uc,
595 UFILE *f);
596
608 U_CAPI int32_t U_EXPORT2
609 u_file_write(const UChar *ustring,
610 int32_t count,
611 UFILE *f);
612
613
614 /* Input functions */
615 #if !UCONFIG_NO_FORMATTING
616
626 U_CAPI int32_t U_EXPORT2
627 u_fscanf(UFILE *f,
628 const char *patternSpecification,
629 ... );
630
644 U_CAPI int32_t U_EXPORT2
645 u_vfscanf(UFILE *f,
646 const char *patternSpecification,
647 va_list ap);
648
658 U_CAPI int32_t U_EXPORT2
659 u_fscanf_u(UFILE *f,
660 const UChar *patternSpecification,
661 ... );
662
676 U_CAPI int32_t U_EXPORT2
677 u_vfscanf_u(UFILE *f,
678 const UChar *patternSpecification,
679 va_list ap);
680 #endif
681
694 U_CAPI UChar* U_EXPORT2
695 u_fgets(UChar *s,
696 int32_t n,
697 UFILE *f);
698
708 U_CAPI UChar U_EXPORT2
709 u_fgetc(UFILE *f);
710
721 U_CAPI UChar32 U_EXPORT2
722 u_fgetcx(UFILE *f);
723
735 U_CAPI UChar32 U_EXPORT2
736 u_fungetc(UChar32 c,
737 UFILE *f);
738
749 U_CAPI int32_t U_EXPORT2
750 u_file_read(UChar *chars,
751 int32_t count,
752 UFILE *f);
753
754 #if !UCONFIG_NO_TRANSLITERATION
755
773 U_CAPI UTransliterator* U_EXPORT2
774 u_fsettransliterator(UFILE *file, UFileDirection direction,
775 UTransliterator *adopt, UErrorCode *status);
776
777 #endif
778
779
780 /* Output string functions */
781 #if !UCONFIG_NO_FORMATTING
782
783
794 U_CAPI int32_t U_EXPORT2
795 u_sprintf(UChar *buffer,
796 const char *patternSpecification,
797 ... );
798
816 U_CAPI int32_t U_EXPORT2
817 u_snprintf(UChar *buffer,
818 int32_t count,
819 const char *patternSpecification,
820 ... );
821
835 U_CAPI int32_t U_EXPORT2
836 u_vsprintf(UChar *buffer,
837 const char *patternSpecification,
838 va_list ap);
839
860 U_CAPI int32_t U_EXPORT2
861 u_vsnprintf(UChar *buffer,
862 int32_t count,
863 const char *patternSpecification,
864 va_list ap);
865
875 U_CAPI int32_t U_EXPORT2
876 u_sprintf_u(UChar *buffer,
877 const UChar *patternSpecification,
878 ... );
879
896 U_CAPI int32_t U_EXPORT2
897 u_snprintf_u(UChar *buffer,
898 int32_t count,
899 const UChar *patternSpecification,
900 ... );
901
915 U_CAPI int32_t U_EXPORT2
916 u_vsprintf_u(UChar *buffer,
917 const UChar *patternSpecification,
918 va_list ap);
919
940 U_CAPI int32_t U_EXPORT2
941 u_vsnprintf_u(UChar *buffer,
942 int32_t count,
943 const UChar *patternSpecification,
944 va_list ap);
945
946 /* Input string functions */
947
958 U_CAPI int32_t U_EXPORT2
959 u_sscanf(const UChar *buffer,
960 const char *patternSpecification,
961 ... );
962
977 U_CAPI int32_t U_EXPORT2
978 u_vsscanf(const UChar *buffer,
979 const char *patternSpecification,
980 va_list ap);
981
992 U_CAPI int32_t U_EXPORT2
993 u_sscanf_u(const UChar *buffer,
994 const UChar *patternSpecification,
995 ... );
996
1011 U_CAPI int32_t U_EXPORT2
1012 u_vsscanf_u(const UChar *buffer,
1013 const UChar *patternSpecification,
1014 va_list ap);
1015
1016
1017 #endif
1018 #endif
1019 #endif
1020
1021
LocalUFILEPointer
"Smart pointer" class, closes a UFILE via u_fclose().
localpointer.h
C++ API: "Smart pointers" for use with and in ICU4C C++ code.
U_DEFINE_LOCAL_OPEN_POINTER
#define U_DEFINE_LOCAL_OPEN_POINTER(LocalPointerClassName, Type, closeFunction)
"Smart pointer" definition macro, deletes objects via the closeFunction.
Definition: localpointer.h:550
ucnv.h
C API: Character conversion.
UConverter
struct UConverter UConverter
Definition: ucnv_err.h:96
UChar32
int32_t UChar32
Define UChar32 as a type for single Unicode code points.
Definition: umachine.h:427
UBool
int8_t UBool
The ICU boolean type, a signed-byte integer.
Definition: umachine.h:247
U_CAPI
#define U_CAPI
This is used to declare a function as a public ICU C API.
Definition: umachine.h:110
UChar
char16_t UChar
The base type for UTF-16 code units and pointers.
Definition: umachine.h:378
unum.h
C API: Compatibility APIs for number formatting.
UNumberFormat
void * UNumberFormat
A number formatter.
Definition: unum.h:145
u_vfprintf_u
U_CAPI int32_t u_vfprintf_u(UFILE *f, const UChar *patternSpecification, va_list ap)
Write formatted data to a UFILE.
u_fopen_u
U_CAPI UFILE * u_fopen_u(const UChar *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 a...
u_feof
U_CAPI UBool u_feof(UFILE *f)
Tests if the UFILE is at the end of the file stream.
u_fscanf_u
U_CAPI int32_t u_fscanf_u(UFILE *f, const UChar *patternSpecification,...)
Read formatted data from a UFILE.
u_vfprintf
U_CAPI int32_t u_vfprintf(UFILE *f, const char *patternSpecification, va_list ap)
Write formatted data to a UFILE.
u_fgetc
U_CAPI UChar u_fgetc(UFILE *f)
Read a UChar from a UFILE.
u_fgetcodepage
U_CAPI const char * u_fgetcodepage(UFILE *file)
Get the codepage in which data is written to and read from the UFILE.
u_file_write
U_CAPI int32_t u_file_write(const UChar *ustring, int32_t count, UFILE *f)
Write Unicode to a UFILE.
u_fflush
U_CAPI void u_fflush(UFILE *file)
Flush output of a UFILE.
u_vfscanf_u
U_CAPI int32_t u_vfscanf_u(UFILE *f, const UChar *patternSpecification, va_list ap)
Read formatted data from a UFILE.
u_fopen
U_CAPI UFILE * u_fopen(const char *filename, const char *perm, const char *locale, const char *codepage)
Open a UFILE.
u_vsnprintf_u
U_CAPI int32_t u_vsnprintf_u(UChar *buffer, int32_t count, const UChar *patternSpecification, va_list ap)
Write formatted data to a Unicode string.
u_fgetNumberFormat
U_CAPI const UNumberFormat * u_fgetNumberFormat(UFILE *f)
Returns an alias to the number formatter being used for this file.
u_fprintf_u
U_CAPI int32_t u_fprintf_u(UFILE *f, const UChar *patternSpecification,...)
Write formatted data to a UFILE.
u_frewind
U_CAPI void u_frewind(UFILE *file)
Rewind the file pointer to the beginning of the file.
u_fgetfile
U_CAPI FILE * u_fgetfile(UFILE *f)
Get the FILE* associated with a UFILE.
u_fclose
U_CAPI void u_fclose(UFILE *file)
Close a UFILE.
u_fgetConverter
U_CAPI UConverter * u_fgetConverter(UFILE *f)
Returns an alias to the converter being used for this file.
u_fsetcodepage
U_CAPI int32_t u_fsetcodepage(const char *codepage, UFILE *file)
Set the codepage in which data will be written to and read from the UFILE.
u_fsettransliterator
U_CAPI UTransliterator * u_fsettransliterator(UFILE *file, UFileDirection direction, UTransliterator *adopt, UErrorCode *status)
Set a transliterator on the UFILE.
u_fsetlocale
U_CAPI int32_t u_fsetlocale(UFILE *file, const char *locale)
Set the locale whose conventions will be used to format and parse output.
u_printf_u
U_CAPI int32_t u_printf_u(const UChar *patternSpecification,...)
Write formatted data to stdout.
u_printf
U_CAPI int32_t u_printf(const char *patternSpecification,...)
Write formatted data to stdout.
u_sprintf
U_CAPI int32_t u_sprintf(UChar *buffer, const char *patternSpecification,...)
Write formatted data to a Unicode string.
u_fscanf
U_CAPI int32_t u_fscanf(UFILE *f, const char *patternSpecification,...)
Read formatted data from a UFILE.
u_fgetlocale
U_CAPI const char * u_fgetlocale(UFILE *file)
Get the locale whose conventions are used to format and parse output.
u_sscanf
U_CAPI int32_t u_sscanf(const UChar *buffer, const char *patternSpecification,...)
Read formatted data from a Unicode string.
u_finit
U_CAPI UFILE * u_finit(FILE *f, const char *locale, const char *codepage)
Open a UFILE on top of an existing FILE* stream.
u_fstropen
U_CAPI UFILE * u_fstropen(UChar *stringBuf, int32_t capacity, const char *locale)
Create a UFILE that can be used for localized formatting or parsing.
u_fputs
U_CAPI int32_t u_fputs(const UChar *s, UFILE *f)
Write a Unicode to a UFILE.
u_file_read
U_CAPI int32_t u_file_read(UChar *chars, int32_t count, UFILE *f)
Read Unicode from a UFILE.
u_fadopt
U_CAPI UFILE * u_fadopt(FILE *f, const char *locale, const char *codepage)
Open a UFILE on top of an existing FILE* stream.
u_vsprintf_u
U_CAPI int32_t u_vsprintf_u(UChar *buffer, const UChar *patternSpecification, va_list ap)
Write formatted data to a Unicode string.
u_snprintf_u
U_CAPI int32_t u_snprintf_u(UChar *buffer, int32_t count, const UChar *patternSpecification,...)
Write formatted data to a Unicode string.
u_fungetc
U_CAPI UChar32 u_fungetc(UChar32 c, UFILE *f)
Unget a UChar from a UFILE.
UFileDirection
UFileDirection
Enum for which direction of stream a transliterator applies to.
Definition: ustdio.h:222
u_vsscanf
U_CAPI int32_t u_vsscanf(const UChar *buffer, const char *patternSpecification, va_list ap)
Read formatted data from a Unicode string.
u_fputc
U_CAPI UChar32 u_fputc(UChar32 uc, UFILE *f)
Write a UChar to a UFILE.
u_snprintf
U_CAPI int32_t u_snprintf(UChar *buffer, int32_t count, const char *patternSpecification,...)
Write formatted data to a Unicode string.
u_fgets
U_CAPI UChar * u_fgets(UChar *s, int32_t n, UFILE *f)
Read one line of text into a UChar* string from a UFILE.
u_sscanf_u
U_CAPI int32_t u_sscanf_u(const UChar *buffer, const UChar *patternSpecification,...)
Read formatted data from a Unicode string.
u_get_stdout
U_CAPI UFILE * u_get_stdout(void)
Get a UFILE for stdout.
u_sprintf_u
U_CAPI int32_t u_sprintf_u(UChar *buffer, const UChar *patternSpecification,...)
Write formatted data to a Unicode string.
u_fprintf
U_CAPI int32_t u_fprintf(UFILE *f, const char *patternSpecification,...)
Write formatted data to a UFILE.
u_fgetcx
U_CAPI UChar32 u_fgetcx(UFILE *f)
Read a UChar32 from a UFILE.
u_vsnprintf
U_CAPI int32_t u_vsnprintf(UChar *buffer, int32_t count, const char *patternSpecification, va_list ap)
Write formatted data to a Unicode string.
UFILE
struct UFILE UFILE
Forward declaration of a Unicode-aware file.
Definition: ustdio.h:215
u_vsprintf
U_CAPI int32_t u_vsprintf(UChar *buffer, const char *patternSpecification, va_list ap)
Write formatted data to a Unicode string.
u_vsscanf_u
U_CAPI int32_t u_vsscanf_u(const UChar *buffer, const UChar *patternSpecification, va_list ap)
Read formatted data from a Unicode string.
u_vfscanf
U_CAPI int32_t u_vfscanf(UFILE *f, const char *patternSpecification, va_list ap)
Read formatted data from a UFILE.
utrans.h
C API: Transliterator.
UTransliterator
void * UTransliterator
An opaque transliterator for use in C.
Definition: utrans.h:73
utypes.h
Basic definitions for ICU, for both C and C++ APIs.
UErrorCode
UErrorCode
Standard ICU4C error code type, a substitute for exceptions.
Definition: utypes.h:430