libmtp: /tmp/libmtp-0.0.18/src/unicode.c File Reference

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# unicode.c File Reference

`#include <stdlib.h>`
`#include <string.h>`
`#include <iconv.h>`
`#include "libmtp.h"`
`#include "unicode.h"`
`#include "util.h"`
`#include "ptp.h"`

## Defines
#define | STRING_BUFFER_LENGTH 1024
## Functions
int | ucs2_strlen (uint16_t const *const unicstr)
char * | utf16_to_utf8 (LIBMTP_mtpdevice_t *device, const uint16_t *unicstr)

## Detailed Description

This file contains general Unicode string manipulation functions. It mainly consist of functions for converting between UCS-2 (used on the devices) and UTF-8 (used by several applications).

For a deeper understanding of Unicode encoding formats see the Wikipedia entries for UTF-16/UCS-2 and UTF-8.

## Define Documentation

#define STRING_BUFFER_LENGTH 1024

The size of the buffer (in characters) used for creating string copies.

## Function Documentation

int ucs2_strlen | ( | uint16_t const *const | unicstr | ) |

Gets the length (in characters, not bytes) of a unicode UCS-2 string, eg a string which physically is 0x00 0x41 0x00 0x00 will return a value of 1.

Parameters:

  | unicstr | a UCS-2 Unicode string

Returns:
  the length of the string, in number of characters. If you want to know the length in bytes, multiply this by two and add two (for zero terminator).

char* utf16_to_utf8 | ( | LIBMTP_mtpdevice_t * | device,
|  | const uint16_t * | unicstr |
| ) |  |  |

Converts a big-endian UTF-16 2-byte string to a UTF-8 string. Actually just a UCS-2 internal conversion routine that strips off the BOM if there is one.

Parameters:

  | device | a pointer to the current device.
  | unicstr | the UTF-16 unicode string to convert

Returns:
  a UTF-8 string.