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ICONV_OPEN(3) Linux Programmer's Manual ICONV_OPEN(3)
iconv_open - allocate descriptor for character set conversion
iconv_t iconv_open(const char *tocode, const char *fromcode);
The iconv_open function allocates a conversion descriptor suitable for converting byte
sequences from character encoding fromcode to character encoding tocode.
The values permitted for fromcode and tocode and the supported combinations are system
dependent. For the GNU C library, the permitted values are listed by the iconv --list com-
mand, and all combinations of the listed values are supported.
The resulting conversion descriptor can be used with iconv any number of times. It remains
valid until deallocated using iconv_close.
A conversion descriptor contains a conversion state. After creation using iconv_open, the
state is in the initial state. Using iconv modifies the descriptor's conversion state.
(This implies that a conversion descriptor can not be used in multiple threads simultane-
ously.) To bring the state back to the initial state, use iconv with NULL as inbuf argu-
The iconv_open function returns a freshly allocated conversion descriptor. In case of
error, it sets errno and returns (iconv_t)(-1).
The following error can occur, among others:
EINVAL The conversion from fromcode to tocode is not supported by the implementation.
iconv(3), iconv_close(3), iconv(1)
GNU 1999-11-27 ICONV_OPEN(3)
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