// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* Copyright ( C ) 1998 - 2016 , International Business Machines
* Corporation and others . All Rights Reserved .
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* File ucbuf . h
*
* Modification History :
*
* Date Name Description
* 05 / 10 / 01 Ram Creation .
*
* This API reads in files and returns UChars
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
#include "unicode/localpointer.h"
#include "unicode/ucnv.h"
#include "filestrm.h"
#if !UCONFIG_NO_CONVERSION
#ifndef UCBUF_H
#define UCBUF_H
1
typedef struct UCHARBUF UCHARBUF;
/**
* End of file value
*/
#define U_EOF ((int32_t)
0 xFFFFFFFF)
/**
* Error value if a sequence cannot be unescaped
*/
#define U_ERR ((int32_t)
0 xFFFFFFFE)
typedef struct ULine ULine;
struct ULine {
UChar *name;
int32_t len;
};
/**
* Opens the UCHARBUF with the given file stream and code page for conversion
* @ param fileName Name of the file to open .
* @ param codepage The encoding of the file stream to convert to Unicode .
* If * codepage is NULL on input the API will try to autodetect
* popular Unicode encodings
* @ param showWarning Flag to print out warnings to STDOUT
* @ param buffered If true performs a buffered read of the input file . If false reads
* the whole file into memory and converts it .
* @ param err is a pointer to a valid < code > UErrorCode < / code > value . If this value
* indicates a failure on entry , the function will immediately return .
* On exit the value will indicate the success of the operation .
* @ return pointer to the newly opened UCHARBUF
*/
U_CAPI UCHARBUF* U_EXPORT2
ucbuf_open(
const char * fileName,
const char ** codepage,UBool showWarning, UBool buffered
, UErrorCode* err);
/**
* Gets a UTF - 16 code unit at the current position from the converted buffer
* and increments the current position
* @ param buf Pointer to UCHARBUF structure
* @ param err is a pointer to a valid < code > UErrorCode < / code > value . If this value
* indicates a failure on entry , the function will immediately return .
* On exit the value will indicate the success of the operation .
*/
U_CAPI int32_t U_EXPORT2
ucbuf_getc(UCHARBUF* buf,UErrorCode* err);
/**
* Gets a UTF - 32 code point at the current position from the converted buffer
* and increments the current position
* @ param buf Pointer to UCHARBUF structure
* @ param err is a pointer to a valid < code > UErrorCode < / code > value . If this value
* indicates a failure on entry , the function will immediately return .
* On exit the value will indicate the success of the operation .
*/
U_CAPI int32_t U_EXPORT2
ucbuf_getc32(UCHARBUF* buf,UErrorCode* err);
/**
* Gets a UTF - 16 code unit at the current position from the converted buffer after
* unescaping and increments the current position . If the escape sequence is for UTF - 32
* code point ( \ \ Uxxxxxxxx ) then a UTF - 32 codepoint is returned
* @ param buf Pointer to UCHARBUF structure
* @ param err is a pointer to a valid < code > UErrorCode < / code > value . If this value
* indicates a failure on entry , the function will immediately return .
* On exit the value will indicate the success of the operation .
*/
U_CAPI int32_t U_EXPORT2
ucbuf_getcx32(UCHARBUF* buf,UErrorCode* err);
/**
* Gets a pointer to the current position in the internal buffer and length of the line .
* It imperative to make a copy of the returned buffer before performing operations on it .
* @ param buf Pointer to UCHARBUF structure
* @ param len Output param to receive the len of the buffer returned till end of the line
* @ param err is a pointer to a valid < code > UErrorCode < / code > value . If this value
* indicates a failure on entry , the function will immediately return .
* On exit the value will indicate the success of the operation .
* Error : U_TRUNCATED_CHAR_FOUND
* @ return Pointer to the internal buffer , NULL if EOF
*/
U_CAPI const UChar* U_EXPORT2
ucbuf_readline(UCHARBUF* buf,int32_t* len, UErrorCode* err);
/**
* Resets the buffers and the underlying file stream .
* @ param buf Pointer to UCHARBUF structure
* @ param err is a pointer to a valid < code > UErrorCode < / code > value . If this value
* indicates a failure on entry , the function will immediately return .
* On exit the value will indicate the success of the operation .
*/
U_CAPI void U_EXPORT2
ucbuf_rewind(UCHARBUF* buf,UErrorCode* err);
/**
* Returns a pointer to the internal converted buffer
* @ param buf Pointer to UCHARBUF structure
* @ param len Pointer to int32_t to receive the length of buffer
* @ param err is a pointer to a valid < code > UErrorCode < / code > value . If this value
* indicates a failure on entry , the function will immediately return .
* On exit the value will indicate the success of the operation .
* @ return Pointer to internal UChar buffer
*/
U_CAPI const UChar* U_EXPORT2
ucbuf_getBuffer(UCHARBUF* buf,int32_t* len,UErrorCode* err);
/**
* Closes the UCHARBUF structure members and cleans up the malloc ' ed memory
* @ param buf Pointer to UCHARBUF structure
*/
U_CAPI void U_EXPORT2
ucbuf_close(UCHARBUF* buf);
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
/**
* \ class LocalUCHARBUFPointer
* " Smart pointer " class , closes a UCHARBUF via ucbuf_close ( ) .
* For most methods see the LocalPointerBase base class .
*
* @ see LocalPointerBase
* @ see LocalPointer
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalUCHARBUFPointer, UCHARBUF, ucbuf_close);
U_NAMESPACE_END
#endif
/**
* Rewinds the buffer by one codepoint . Does not rewind over escaped characters .
*/
U_CAPI void U_EXPORT2
ucbuf_ungetc(int32_t ungetChar,UCHARBUF* buf);
/**
* Autodetects the encoding of the file stream . Only Unicode charsets are autodectected .
* Some Unicode charsets are stateful and need byte identifiers to be converted also to bring
* the converter to correct state for converting the rest of the stream . So the UConverter parameter
* is necessary .
* If the charset was autodetected , the caller must close both the input FileStream
* and the converter .
*
* @ param fileName The file name to be opened and encoding autodected
* @ param conv Output param to receive the opened converter if autodetected ; NULL otherwise .
* @ param cp Output param to receive the detected encoding
* @ param err is a pointer to a valid < code > UErrorCode < / code > value . If this value
* indicates a failure on entry , the function will immediately return .
* On exit the value will indicate the success of the operation .
* @ return The input FileStream if its charset was autodetected ; NULL otherwise .
*/
U_CAPI FileStream * U_EXPORT2
ucbuf_autodetect(const char * fileName, const char ** cp,UConverter** conv,
int32_t* signatureLength, UErrorCode* status);
/**
* Autodetects the encoding of the file stream . Only Unicode charsets are autodectected .
* Some Unicode charsets are stateful and need byte identifiers to be converted also to bring
* the converter to correct state for converting the rest of the stream . So the UConverter parameter
* is necessary .
* If the charset was autodetected , the caller must close the converter .
*
* @ param fileStream The file stream whose encoding is to be detected
* @ param conv Output param to receive the opened converter if autodetected ; NULL otherwise .
* @ param cp Output param to receive the detected encoding
* @ param err is a pointer to a valid < code > UErrorCode < / code > value . If this value
* indicates a failure on entry , the function will immediately return .
* On exit the value will indicate the success of the operation .
* @ return Boolean whether the Unicode charset was autodetected .
*/
U_CAPI UBool U_EXPORT2
ucbuf_autodetect_fs(FileStream* in, const char ** cp, UConverter** conv, int32_t* signatureLength, UErrorCode* status);
/**
* Returns the approximate size in UChars required for converting the file to UChars
*/
U_CAPI int32_t U_EXPORT2
ucbuf_size(UCHARBUF* buf);
U_CAPI const char * U_EXPORT2
ucbuf_resolveFileName(const char * inputDir, const char * fileName, char * target, int32_t* len, UErrorCode* status);
#endif
#endif
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