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ICONV_OPEN(3) Linux Programmer's Manual ICONV_OPEN(3)
NAME
iconv_open - allocate descriptor for character set conversion
SYNOPSIS
#include <iconv.h>
iconv_t iconv_open(const char *tocode, const char *fromcode);
DESCRIPTION
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 command, and all combinations of the listed values are supported. Furthermore the GNU C library and the GNU libiconv library support the following
two suffixes:
//TRANSLIT
When the string "//TRANSLIT" is appended to tocode, transliteration is activated. This means that when a character cannot be represented in the target
character set, it can be approximated through one or several similarly looking characters.
//IGNORE
When the string "//IGNORE" is appended to tocode, characters that cannot be represented in the target character set will be silently discarded.
The resulting conversion descriptor can be used with iconv(3) any number of times. It remains valid until deallocated using iconv_close(3).
A conversion descriptor contains a conversion state. After creation using iconv_open(), the state is in the initial state. Using iconv(3) modifies the descrip‐
tor's conversion state. To bring the state back to the initial state, use iconv(3) with NULL as inbuf argument.
RETURN VALUE
On success, iconv_open() returns a freshly allocated conversion descriptor. On failure, it returns (iconv_t) -1 and sets errno to indicate the error.
ERRORS
The following error can occur, among others:
EINVAL The conversion from fromcode to tocode is not supported by the implementation.
VERSIONS
This function is available in glibc since version 2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────┼────────────────┤
│iconv_open() │ Thread safety │ MT-Safe locale │
└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴────────────────┘
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, SUSv2.
SEE ALSO
iconv(1), iconv(3), iconv_close(3)
GNU 2021-03-22 ICONV_OPEN(3)