ICU 67.1 67.1

ustdio.h
Go to the documentation of this file.
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/localpointer.h"
34 #include "unicode/unum.h"
35
36 #if !UCONFIG_NO_CONVERSION
37
38 /*
39 TODO
40 The following is a small list as to what is currently wrong/suggestions for
41 ustdio.
42
43 * Make sure that * in the scanf format specification works for all formats.
44 * Each UFILE takes up at least 2KB.
45 Look into adding setvbuf() for configurable buffers.
46 * This library does buffering. The OS should do this for us already. Check on
47 this, and remove it from this library, if this is the case. Double buffering
48 wastes a lot of time and space.
49 * Test stdin and stdout with the u_f* functions
50 * Testing should be done for reading and writing multi-byte encodings,
51 and make sure that a character that is contained across buffer boundries
52 works even for incomplete characters.
53 * Make sure that the last character is flushed when the file/string is closed.
54 * snprintf should follow the C99 standard for the return value, which is
55 return the number of characters (excluding the trailing '\0')
56 which would have been written to the destination string regardless
57 of available space. This is like pre-flighting.
58 * Everything that uses %s should do what operator>> does for UnicodeString.
59 It should convert one byte at a time, and once a character is
60 converted then check to see if it's whitespace or in the scanset.
61 If it's whitespace or in the scanset, put all the bytes back (do nothing
62 for sprintf/sscanf).
63 * If bad string data is encountered, make sure that the function fails
64 without memory leaks and the unconvertable characters are valid
65 substitution or are escaped characters.
66 * u_fungetc() can't unget a character when it's at the beginning of the
67 internal conversion buffer. For example, read the buffer size # of
68 characters, and then ungetc to get the previous character that was
69 at the end of the last buffer.
70 * u_fflush() and u_fclose should return an int32_t like C99 functions.
71 0 is returned if the operation was successful and EOF otherwise.
72 * u_fsettransliterator does not support U_READ side of transliteration.
73 * The format specifier should limit the size of a format or honor it in
74 order to prevent buffer overruns. (e.g. %256.256d).
75 * u_fread and u_fwrite don't exist. They're needed for reading and writing
76 data structures without any conversion.
77 * u_file_read and u_file_write are used for writing strings. u_fgets and
78 u_fputs or u_fread and u_fwrite should be used to do this.
79 * The width parameter for all scanf formats, including scanset, needs
80 better testing. This prevents buffer overflows.
81 * Figure out what is suppose to happen when a codepage is changed midstream.
82 Maybe a flush or a rewind are good enough.
83 * Make sure that a UFile opened with "rw" can be used after using
84 u_fflush with a u_frewind.
85 * scanf(%i) should detect what type of number to use.
86 * Add more testing of the alternate format, %#
87 * Look at newline handling of fputs/puts
88 * Think more about codeunit/codepoint error handling/support in %S,%s,%C,%c,%[]
89 * Complete the file documentation with proper doxygen formatting.
90 See http://oss.software.ibm.com/pipermail/icu/2003-July/005647.html
91 */
92
209 #define U_EOF 0xFFFF
210
212 typedef struct UFILE UFILE;
213
219 typedef enum {
220 U_READ = 1,
221 U_WRITE = 2,
222 U_READWRITE =3 /* == (U_READ | U_WRITE) */
223 } UFileDirection;
224
242 U_STABLE UFILE* U_EXPORT2
243 u_fopen(const char *filename,
244 const char *perm,
245 const char *locale,
246 const char *codepage);
247
265 U_STABLE UFILE* U_EXPORT2
266 u_fopen_u(const UChar *filename,
267 const char *perm,
268 const char *locale,
269 const char *codepage);
270
287 U_STABLE UFILE* U_EXPORT2
288 u_finit(FILE *f,
289 const char *locale,
290 const char *codepage);
291
308 U_STABLE UFILE* U_EXPORT2
309 u_fadopt(FILE *f,
310 const char *locale,
311 const char *codepage);
312
327 U_STABLE UFILE* U_EXPORT2
328 u_fstropen(UChar *stringBuf,
329 int32_t capacity,
330 const char *locale);
331
338 U_STABLE void U_EXPORT2
339 u_fclose(UFILE *file);
340
341 #if U_SHOW_CPLUSPLUS_API
342
343 U_NAMESPACE_BEGIN
344
354 U_DEFINE_LOCAL_OPEN_POINTER(LocalUFILEPointer, UFILE, u_fclose);
355
356 U_NAMESPACE_END
357
358 #endif
359
368 U_STABLE UBool U_EXPORT2
369 u_feof(UFILE *f);
370
381 U_STABLE void U_EXPORT2
382 u_fflush(UFILE *file);
383
389 U_STABLE void
390 u_frewind(UFILE *file);
391
398 U_STABLE FILE* U_EXPORT2
399 u_fgetfile(UFILE *f);
400
401 #if !UCONFIG_NO_FORMATTING
402
411 U_STABLE const char* U_EXPORT2
412 u_fgetlocale(UFILE *file);
413
422 U_STABLE int32_t U_EXPORT2
423 u_fsetlocale(UFILE *file,
424 const char *locale);
425
426 #endif
427
437 U_STABLE const char* U_EXPORT2
438 u_fgetcodepage(UFILE *file);
439
455 U_STABLE int32_t U_EXPORT2
456 u_fsetcodepage(const char *codepage,
457 UFILE *file);
458
459
466 U_STABLE UConverter* U_EXPORT2 u_fgetConverter(UFILE *f);
467
468 #if !UCONFIG_NO_FORMATTING
469
475 U_STABLE const UNumberFormat* U_EXPORT2 u_fgetNumberFormat(UFILE *f);
476
477 /* Output functions */
478
486 U_STABLE int32_t U_EXPORT2
487 u_printf(const char *patternSpecification,
488 ... );
489
498 U_STABLE int32_t U_EXPORT2
499 u_fprintf(UFILE *f,
500 const char *patternSpecification,
501 ... );
502
515 U_STABLE int32_t U_EXPORT2
516 u_vfprintf(UFILE *f,
517 const char *patternSpecification,
518 va_list ap);
519
527 U_STABLE int32_t U_EXPORT2
528 u_printf_u(const UChar *patternSpecification,
529 ... );
530
536 U_STABLE UFILE * U_EXPORT2
537 u_get_stdout(void);
538
547 U_STABLE int32_t U_EXPORT2
548 u_fprintf_u(UFILE *f,
549 const UChar *patternSpecification,
550 ... );
551
564 U_STABLE int32_t U_EXPORT2
565 u_vfprintf_u(UFILE *f,
566 const UChar *patternSpecification,
567 va_list ap);
568 #endif
569
579 U_STABLE int32_t U_EXPORT2
580 u_fputs(const UChar *s,
581 UFILE *f);
582
590 U_STABLE UChar32 U_EXPORT2
591 u_fputc(UChar32 uc,
592 UFILE *f);
593
605 U_STABLE int32_t U_EXPORT2
606 u_file_write(const UChar *ustring,
607 int32_t count,
608 UFILE *f);
609
610
611 /* Input functions */
612 #if !UCONFIG_NO_FORMATTING
613
623 U_STABLE int32_t U_EXPORT2
624 u_fscanf(UFILE *f,
625 const char *patternSpecification,
626 ... );
627
641 U_STABLE int32_t U_EXPORT2
642 u_vfscanf(UFILE *f,
643 const char *patternSpecification,
644 va_list ap);
645
655 U_STABLE int32_t U_EXPORT2
656 u_fscanf_u(UFILE *f,
657 const UChar *patternSpecification,
658 ... );
659
673 U_STABLE int32_t U_EXPORT2
674 u_vfscanf_u(UFILE *f,
675 const UChar *patternSpecification,
676 va_list ap);
677 #endif
678
691 U_STABLE UChar* U_EXPORT2
692 u_fgets(UChar *s,
693 int32_t n,
694 UFILE *f);
695
705 U_STABLE UChar U_EXPORT2
706 u_fgetc(UFILE *f);
707
718 U_STABLE UChar32 U_EXPORT2
719 u_fgetcx(UFILE *f);
720
732 U_STABLE UChar32 U_EXPORT2
733 u_fungetc(UChar32 c,
734 UFILE *f);
735
746 U_STABLE int32_t U_EXPORT2
747 u_file_read(UChar *chars,
748 int32_t count,
749 UFILE *f);
750
751 #if !UCONFIG_NO_TRANSLITERATION
752
770 U_STABLE UTransliterator* U_EXPORT2
771 u_fsettransliterator(UFILE *file, UFileDirection direction,
772 UTransliterator *adopt, UErrorCode *status);
773
774 #endif
775
776
777 /* Output string functions */
778 #if !UCONFIG_NO_FORMATTING
779
780
791 U_STABLE int32_t U_EXPORT2
792 u_sprintf(UChar *buffer,
793 const char *patternSpecification,
794 ... );
795
813 U_STABLE int32_t U_EXPORT2
814 u_snprintf(UChar *buffer,
815 int32_t count,
816 const char *patternSpecification,
817 ... );
818
832 U_STABLE int32_t U_EXPORT2
833 u_vsprintf(UChar *buffer,
834 const char *patternSpecification,
835 va_list ap);
836
857 U_STABLE int32_t U_EXPORT2
858 u_vsnprintf(UChar *buffer,
859 int32_t count,
860 const char *patternSpecification,
861 va_list ap);
862
872 U_STABLE int32_t U_EXPORT2
873 u_sprintf_u(UChar *buffer,
874 const UChar *patternSpecification,
875 ... );
876
893 U_STABLE int32_t U_EXPORT2
894 u_snprintf_u(UChar *buffer,
895 int32_t count,
896 const UChar *patternSpecification,
897 ... );
898
912 U_STABLE int32_t U_EXPORT2
913 u_vsprintf_u(UChar *buffer,
914 const UChar *patternSpecification,
915 va_list ap);
916
937 U_STABLE int32_t U_EXPORT2
938 u_vsnprintf_u(UChar *buffer,
939 int32_t count,
940 const UChar *patternSpecification,
941 va_list ap);
942
943 /* Input string functions */
944
955 U_STABLE int32_t U_EXPORT2
956 u_sscanf(const UChar *buffer,
957 const char *patternSpecification,
958 ... );
959
974 U_STABLE int32_t U_EXPORT2
975 u_vsscanf(const UChar *buffer,
976 const char *patternSpecification,
977 va_list ap);
978
989 U_STABLE int32_t U_EXPORT2
990 u_sscanf_u(const UChar *buffer,
991 const UChar *patternSpecification,
992 ... );
993
1008 U_STABLE int32_t U_EXPORT2
1009 u_vsscanf_u(const UChar *buffer,
1010 const UChar *patternSpecification,
1011 va_list ap);
1012
1013
1014 #endif
1015 #endif
1016 #endif
1017
1018
u_fopen
UFILE * u_fopen(const char *filename, const char *perm, const char *locale, const char *codepage)
Open a UFILE.
u_fputs
int32_t u_fputs(const UChar *s, UFILE *f)
Write a Unicode to a UFILE.
u_fgetc
UChar u_fgetc(UFILE *f)
Read a UChar from a UFILE.
UTransliterator
void * UTransliterator
An opaque transliterator for use in C.
Definition: utrans.h:70
u_vsscanf
int32_t u_vsscanf(const UChar *buffer, const char *patternSpecification, va_list ap)
Read formatted data from a Unicode string.
u_fscanf_u
int32_t u_fscanf_u(UFILE *f, const UChar *patternSpecification,...)
Read formatted data from a UFILE.
u_printf
int32_t u_printf(const char *patternSpecification,...)
Write formatted data to stdout.
u_fsettransliterator
UTransliterator * u_fsettransliterator(UFILE *file, UFileDirection direction, UTransliterator *adopt, UErrorCode *status)
Set a transliterator on the UFILE.
u_fflush
void u_fflush(UFILE *file)
Flush output of a UFILE.
u_file_write
int32_t u_file_write(const UChar *ustring, int32_t count, UFILE *f)
Write Unicode to a UFILE.
UFILE
struct UFILE UFILE
Forward declaration of a Unicode-aware file.
Definition: ustdio.h:212
UFileDirection
UFileDirection
Enum for which direction of stream a transliterator applies to.
Definition: ustdio.h:219
u_fscanf
int32_t u_fscanf(UFILE *f, const char *patternSpecification,...)
Read formatted data from a UFILE.
u_vfprintf
int32_t u_vfprintf(UFILE *f, const char *patternSpecification, va_list ap)
Write formatted data to a UFILE.
u_file_read
int32_t u_file_read(UChar *chars, int32_t count, UFILE *f)
Read Unicode from a UFILE.
u_frewind
void u_frewind(UFILE *file)
Rewind the file pointer to the beginning of the file.
u_fopen_u
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_get_stdout
UFILE * u_get_stdout(void)
Get a UFILE for stdout.
u_fputc
UChar32 u_fputc(UChar32 uc, UFILE *f)
Write a UChar to a UFILE.
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
UNumberFormat
void * UNumberFormat
A number formatter.
Definition: unum.h:141
u_vfprintf_u
int32_t u_vfprintf_u(UFILE *f, const UChar *patternSpecification, va_list ap)
Write formatted data to a UFILE.
u_sprintf
int32_t u_sprintf(UChar *buffer, const char *patternSpecification,...)
Write formatted data to a Unicode string.
localpointer.h
C++ API: "Smart pointers" for use with and in ICU4C C++ code.
u_fsetcodepage
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_vsnprintf_u
int32_t u_vsnprintf_u(UChar *buffer, int32_t count, const UChar *patternSpecification, va_list ap)
Write formatted data to a Unicode string.
UChar32
int32_t UChar32
Define UChar32 as a type for single Unicode code points.
Definition: umachine.h:425
u_vsprintf_u
int32_t u_vsprintf_u(UChar *buffer, const UChar *patternSpecification, va_list ap)
Write formatted data to a Unicode string.
u_fgetConverter
UConverter * u_fgetConverter(UFILE *f)
Returns an alias to the converter being used for this file.
u_feof
UBool u_feof(UFILE *f)
Tests if the UFILE is at the end of the file stream.
utrans.h
C API: Transliterator.
u_fsetlocale
int32_t u_fsetlocale(UFILE *file, const char *locale)
Set the locale whose conventions will be used to format and parse output.
u_fstropen
UFILE * u_fstropen(UChar *stringBuf, int32_t capacity, const char *locale)
Create a UFILE that can be used for localized formatting or parsing.
u_vsnprintf
int32_t u_vsnprintf(UChar *buffer, int32_t count, const char *patternSpecification, va_list ap)
Write formatted data to a Unicode string.
u_vsprintf
int32_t u_vsprintf(UChar *buffer, const char *patternSpecification, va_list ap)
Write formatted data to a Unicode string.
u_sprintf_u
int32_t u_sprintf_u(UChar *buffer, const UChar *patternSpecification,...)
Write formatted data to a Unicode string.
u_vfscanf_u
int32_t u_vfscanf_u(UFILE *f, const UChar *patternSpecification, va_list ap)
Read formatted data from a UFILE.
UChar
char16_t UChar
The base type for UTF-16 code units and pointers.
Definition: umachine.h:376
u_sscanf
int32_t u_sscanf(const UChar *buffer, const char *patternSpecification,...)
Read formatted data from a Unicode string.
u_fgetcodepage
const char * u_fgetcodepage(UFILE *file)
Get the codepage in which data is written to and read from the UFILE.
u_fgetfile
FILE * u_fgetfile(UFILE *f)
Get the FILE* associated with a UFILE.
u_vfscanf
int32_t u_vfscanf(UFILE *f, const char *patternSpecification, va_list ap)
Read formatted data from a UFILE.
u_fprintf_u
int32_t u_fprintf_u(UFILE *f, const UChar *patternSpecification,...)
Write formatted data to a UFILE.
u_fungetc
UChar32 u_fungetc(UChar32 c, UFILE *f)
Unget a UChar from a UFILE.
u_fgetcx
UChar32 u_fgetcx(UFILE *f)
Read a UChar32 from a UFILE.
UConverter
struct UConverter UConverter
Definition: ucnv_err.h:96
LocalUFILEPointer
"Smart pointer" class, closes a UFILE via u_fclose().
UErrorCode
UErrorCode
Standard ICU4C error code type, a substitute for exceptions.
Definition: utypes.h:415
u_printf_u
int32_t u_printf_u(const UChar *patternSpecification,...)
Write formatted data to stdout.
u_finit
UFILE * u_finit(FILE *f, const char *locale, const char *codepage)
Open a UFILE on top of an existing FILE* stream.
u_fprintf
int32_t u_fprintf(UFILE *f, const char *patternSpecification,...)
Write formatted data to a UFILE.
utypes.h
Basic definitions for ICU, for both C and C++ APIs.
u_snprintf
int32_t u_snprintf(UChar *buffer, int32_t count, const char *patternSpecification,...)
Write formatted data to a Unicode string.
u_snprintf_u
int32_t u_snprintf_u(UChar *buffer, int32_t count, const UChar *patternSpecification,...)
Write formatted data to a Unicode string.
u_fgetNumberFormat
const UNumberFormat * u_fgetNumberFormat(UFILE *f)
Returns an alias to the number formatter being used for this file.
u_fclose
void u_fclose(UFILE *file)
Close a UFILE.
u_vsscanf_u
int32_t u_vsscanf_u(const UChar *buffer, const UChar *patternSpecification, va_list ap)
Read formatted data from a Unicode string.
u_fgetlocale
const char * u_fgetlocale(UFILE *file)
Get the locale whose conventions are used to format and parse output.
u_fgets
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
int32_t u_sscanf_u(const UChar *buffer, const UChar *patternSpecification,...)
Read formatted data from a Unicode string.
ucnv.h
C API: Character conversion.
u_fadopt
UFILE * u_fadopt(FILE *f, const char *locale, const char *codepage)
Open a UFILE on top of an existing FILE* stream.
U_STABLE
#define U_STABLE
This is used to declare a function as a stable public ICU C API.
Definition: umachine.h:111
UBool
int8_t UBool
The ICU boolean type.
Definition: umachine.h:261
unum.h
C API: Compatibility APIs for number formatting.