diff options
Diffstat (limited to 'intl/icu/source/io/ufile.c')
| -rw-r--r-- | intl/icu/source/io/ufile.c | 362 |
1 files changed, 362 insertions, 0 deletions
diff --git a/intl/icu/source/io/ufile.c b/intl/icu/source/io/ufile.c new file mode 100644 index 000000000..87ed3f1e9 --- /dev/null +++ b/intl/icu/source/io/ufile.c @@ -0,0 +1,362 @@ +// Copyright (C) 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 ufile.c +* +* Modification History: +* +* Date Name Description +* 11/19/98 stephen Creation. +* 03/12/99 stephen Modified for new C API. +* 06/16/99 stephen Changed T_LocaleBundle to u_locbund +* 07/19/99 stephen Fixed to use ucnv's default codepage. +****************************************************************************** +*/ + +/* + * fileno is not declared when building with GCC in strict mode. + */ +#if defined(__GNUC__) && defined(__STRICT_ANSI__) +#undef __STRICT_ANSI__ +#endif + +#include "locmap.h" +#include "unicode/ustdio.h" + +#if !UCONFIG_NO_CONVERSION + +#include "ufile.h" +#include "unicode/uloc.h" +#include "unicode/ures.h" +#include "unicode/ucnv.h" +#include "unicode/ustring.h" +#include "cstring.h" +#include "cmemory.h" + +#if U_PLATFORM_USES_ONLY_WIN32_API && !defined(fileno) +/* Windows likes to rename Unix-like functions */ +#define fileno _fileno +#endif + +static UFILE* +finit_owner(FILE *f, + const char *locale, + const char *codepage, + UBool takeOwnership + ) +{ + UErrorCode status = U_ZERO_ERROR; + UFILE *result; + if(f == NULL) { + return 0; + } + result = (UFILE*) uprv_malloc(sizeof(UFILE)); + if(result == NULL) { + return 0; + } + + uprv_memset(result, 0, sizeof(UFILE)); + result->fFileno = fileno(f); + +#if U_PLATFORM_USES_ONLY_WIN32_API && _MSC_VER < 1900 + /* + * Below is a very old workaround (ICU ticket:231). + * + * Previously, 'FILE*' from inside and outside ICU's DLL + * were different, because they pointed into local copies + * of the io block. At least by VS 2015 the implementation + * is something like: + * stdio = _acrt_iob_func(0) + * .. which is a function call, so should return the same pointer + * regardless of call site. + * As of _MSC_VER 1900 this patch is retired, at 16 years old. + */ + if (0 <= result->fFileno && result->fFileno <= 2) { + /* stdin, stdout and stderr need to be special cased for Windows 98 */ +#if _MSC_VER >= 1400 + result->fFile = &__iob_func()[_fileno(f)]; +#else + result->fFile = &_iob[_fileno(f)]; +#endif + } + else +#endif + { + result->fFile = f; + } + + result->str.fBuffer = result->fUCBuffer; + result->str.fPos = result->fUCBuffer; + result->str.fLimit = result->fUCBuffer; + +#if !UCONFIG_NO_FORMATTING + /* if locale is 0, use the default */ + if(u_locbund_init(&result->str.fBundle, locale) == 0) { + /* DO NOT FCLOSE HERE! */ + uprv_free(result); + return 0; + } +#endif + + /* If the codepage is not "" use the ucnv_open default behavior */ + if(codepage == NULL || *codepage != '\0') { + result->fConverter = ucnv_open(codepage, &status); + } + /* else result->fConverter is already memset'd to NULL. */ + + if(U_SUCCESS(status)) { + result->fOwnFile = takeOwnership; + } + else { +#if !UCONFIG_NO_FORMATTING + u_locbund_close(&result->str.fBundle); +#endif + /* DO NOT fclose here!!!!!! */ + uprv_free(result); + result = NULL; + } + + return result; +} + +U_CAPI UFILE* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */ +u_finit(FILE *f, + const char *locale, + const char *codepage) +{ + return finit_owner(f, locale, codepage, FALSE); +} + +U_CAPI UFILE* U_EXPORT2 +u_fadopt(FILE *f, + const char *locale, + const char *codepage) +{ + return finit_owner(f, locale, codepage, TRUE); +} + +U_CAPI UFILE* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */ +u_fopen(const char *filename, + const char *perm, + const char *locale, + const char *codepage) +{ + UFILE *result; + FILE *systemFile = fopen(filename, perm); + if(systemFile == 0) { + return 0; + } + + result = finit_owner(systemFile, locale, codepage, TRUE); + + if (!result) { + /* Something bad happened. + Maybe the converter couldn't be opened. */ + fclose(systemFile); + } + + return result; /* not a file leak */ +} + +U_CAPI UFILE* U_EXPORT2 +u_fopen_u(const UChar *filename, + const char *perm, + const char *locale, + const char *codepage) +{ + UFILE *result; + char buffer[256]; + + u_austrcpy(buffer, filename); + + result = u_fopen(buffer, perm, locale, codepage); +#if U_PLATFORM_USES_ONLY_WIN32_API + /* Try Windows API _wfopen if the above fails. */ + if (!result) { + FILE *systemFile = _wfopen(filename, (UChar*)perm); + if (systemFile) { + result = finit_owner(systemFile, locale, codepage, TRUE); + } + if (!result) { + /* Something bad happened. + Maybe the converter couldn't be opened. */ + fclose(systemFile); + } + } +#endif + return result; /* not a file leak */ +} + +U_CAPI UFILE* U_EXPORT2 +u_fstropen(UChar *stringBuf, + int32_t capacity, + const char *locale) +{ + UFILE *result; + + if (capacity < 0) { + return NULL; + } + + result = (UFILE*) uprv_malloc(sizeof(UFILE)); + /* Null pointer test */ + if (result == NULL) { + return NULL; /* Just get out. */ + } + uprv_memset(result, 0, sizeof(UFILE)); + result->str.fBuffer = stringBuf; + result->str.fPos = stringBuf; + result->str.fLimit = stringBuf+capacity; + +#if !UCONFIG_NO_FORMATTING + /* if locale is 0, use the default */ + if(u_locbund_init(&result->str.fBundle, locale) == 0) { + /* DO NOT FCLOSE HERE! */ + uprv_free(result); + return 0; + } +#endif + + return result; +} + +U_CAPI UBool U_EXPORT2 +u_feof(UFILE *f) +{ + UBool endOfBuffer; + if (f == NULL) { + return TRUE; + } + endOfBuffer = (UBool)(f->str.fPos >= f->str.fLimit); + if (f->fFile != NULL) { + return endOfBuffer && feof(f->fFile); + } + return endOfBuffer; +} + +U_CAPI void U_EXPORT2 +u_fflush(UFILE *file) +{ + ufile_flush_translit(file); + ufile_flush_io(file); + if (file->fFile) { + fflush(file->fFile); + } + else if (file->str.fPos < file->str.fLimit) { + *(file->str.fPos++) = 0; + } + /* TODO: flush input */ +} + +U_CAPI void +u_frewind(UFILE *file) +{ + u_fflush(file); + ucnv_reset(file->fConverter); + if (file->fFile) { + rewind(file->fFile); + file->str.fLimit = file->fUCBuffer; + file->str.fPos = file->fUCBuffer; + } + else { + file->str.fPos = file->str.fBuffer; + } +} + +U_CAPI void U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */ +u_fclose(UFILE *file) +{ + if (file) { + u_fflush(file); + ufile_close_translit(file); + + if(file->fOwnFile) + fclose(file->fFile); + +#if !UCONFIG_NO_FORMATTING + u_locbund_close(&file->str.fBundle); +#endif + + ucnv_close(file->fConverter); + uprv_free(file); + } +} + +U_CAPI FILE* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */ +u_fgetfile( UFILE *f) +{ + return f->fFile; +} + +#if !UCONFIG_NO_FORMATTING + +U_CAPI const char* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */ +u_fgetlocale( UFILE *file) +{ + return file->str.fBundle.fLocale; +} + +U_CAPI int32_t U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */ +u_fsetlocale(UFILE *file, + const char *locale) +{ + u_locbund_close(&file->str.fBundle); + + return u_locbund_init(&file->str.fBundle, locale) == 0 ? -1 : 0; +} + +#endif + +U_CAPI const char* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */ +u_fgetcodepage(UFILE *file) +{ + UErrorCode status = U_ZERO_ERROR; + const char *codepage = NULL; + + if (file->fConverter) { + codepage = ucnv_getName(file->fConverter, &status); + if(U_FAILURE(status)) + return 0; + } + return codepage; +} + +U_CAPI int32_t U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */ +u_fsetcodepage( const char *codepage, + UFILE *file) +{ + UErrorCode status = U_ZERO_ERROR; + int32_t retVal = -1; + + /* We use the normal default codepage for this system, and not the one for the locale. */ + if ((file->str.fPos == file->str.fBuffer) && (file->str.fLimit == file->str.fBuffer)) { + ucnv_close(file->fConverter); + file->fConverter = ucnv_open(codepage, &status); + if(U_SUCCESS(status)) { + retVal = 0; + } + } + return retVal; +} + + +U_CAPI UConverter * U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */ +u_fgetConverter(UFILE *file) +{ + return file->fConverter; +} +#if !UCONFIG_NO_FORMATTING +U_CAPI const UNumberFormat* U_EXPORT2 u_fgetNumberFormat(UFILE *file) +{ + return u_locbund_getNumberFormat(&file->str.fBundle, UNUM_DECIMAL); +} +#endif + +#endif |