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gecko-dev/intl/icu/source/io/ufile.cpp

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8.6 KiB
C++
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// © 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.cpp
*
* 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.
******************************************************************************
*/
#include "unicode/platform.h"
#if defined(__GNUC__) && !defined(__clang__) && defined(__STRICT_ANSI__)
// g++, fileno isn't defined if __STRICT_ANSI__ is defined.
// clang fails to compile the <string> header unless __STRICT_ANSI__ is defined.
// __GNUC__ is set by both gcc and clang.
#undef __STRICT_ANSI__
#endif
#include "locmap.h"
#include "unicode/ustdio.h"
#if !UCONFIG_NO_CONVERSION
#include <stdlib.h>
#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);
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) {
// TODO: test this code path, including wperm.
wchar_t wperm[40] = {};
size_t retVal;
mbstowcs_s(&retVal, wperm, UPRV_LENGTHOF(wperm), perm, _TRUNCATE);
FILE *systemFile = _wfopen((const wchar_t *)filename, wperm);
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
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