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| -rw-r--r-- | intl/icu/source/tools/toolutil/ucbuf.h | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/intl/icu/source/tools/toolutil/ucbuf.h b/intl/icu/source/tools/toolutil/ucbuf.h new file mode 100644 index 0000000000..117920b794 --- /dev/null +++ b/intl/icu/source/tools/toolutil/ucbuf.h @@ -0,0 +1,218 @@ +// © 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)0xFFFFFFFF) +/** + * Error value if a sequence cannot be unescaped + */ +#define U_ERR ((int32_t)0xFFFFFFFE) + +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 + |