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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PPAPI_C_DEV_PPB_CHAR_SET_DEV_H_
#define PPAPI_C_DEV_PPB_CHAR_SET_DEV_H_
#include "ppapi/c/pp_module.h"
#include "ppapi/c/pp_stdint.h"
#include "ppapi/c/pp_var.h"
#define PPB_CHAR_SET_DEV_INTERFACE "PPB_CharSet(Dev);0.2"
// Specifies the error behavior for the character set conversion functions.
// This will affect two cases: where the input is not encoded correctly, and
// when the requested character can not be converted to the destination
// character set.
enum PP_CharSet_ConversionError {
// Causes the entire conversion to fail if an error is encountered. The
// conversion function will return NULL.
PP_CHARSET_CONVERSIONERROR_FAIL,
// Silently skips over errors. Unrepresentable characters and input encoding
// errors will be removed from the output.
PP_CHARSET_CONVERSIONERROR_SKIP,
// Replaces the error or unrepresentable character with a substitution
// character. When converting to a Unicode character set (UTF-8 or UTF-16)
// it will use the unicode "substitution character" U+FFFD. When converting
// to another character set, the character will be charset-specific. For
// many languages this will be the representation of the '?' character.
PP_CHARSET_CONVERSIONERROR_SUBSTITUTE,
};
struct PPB_CharSet_Dev {
// Converts the UTF-16 string pointed to in |*utf16| to an 8-bit string in the
// specified code page. |utf16_len| is measured in UTF-16 units, not bytes.
// This value may not be NULL.
//
// The return value is a NULL-terminated 8-bit string corresponding to the
// new character set, or NULL on failure. THIS STRING MUST BE FREED USING
// PPB_Core::MemFree(). The length of the returned string, not including the
// terminating NULL, will be placed into *output_length. When there is no
// error, the result will always be non-NULL, even if the output is 0-length.
// In this case, it will only contain the terminator. You must still call
// MemFree any time the return value is non-NULL.
//
// This function will return NULL if there was an error converting the string
// and you requested PP_CHARSET_CONVERSIONERROR_FAIL, or the output character
// set was unknown.
char* (*UTF16ToCharSet)(const uint16_t* utf16, uint32_t utf16_len,
const char* output_char_set,
enum PP_CharSet_ConversionError on_error,
uint32_t* output_length);
// Same as UTF16ToCharSet except converts in the other direction. The input
// is in the given charset, and the |input_len| is the number of bytes in
// the |input| string. |*output_length| is the number of 16-bit values in
// the output not counting the terminating NULL.
//
// Since UTF16 can represent every Unicode character, the only time the
// replacement character will be used is if the encoding in the input string
// is incorrect.
uint16_t* (*CharSetToUTF16)(const char* input, uint32_t input_len,
const char* input_char_set,
enum PP_CharSet_ConversionError on_error,
uint32_t* output_length);
// Returns a string var representing the current multi-byte character set of
// the current system.
//
// WARNING: You really shouldn't be using this function unless you're dealing
// with legacy data. You should be using UTF-8 or UTF-16 and you don't have
// to worry about the character sets.
struct PP_Var (*GetDefaultCharSet)(PP_Module module);
};
#endif // PPAPI_C_DEV_PPB_CHAR_SET_DEV_H_
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