Allocate descriptor for character set conversion
#include <iconv.h> 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 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:
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.
When the string "//IGNORE" is appended to tocode, characters that cannot be represented in the target character set will be silently discarded.
A conversion descriptor contains a conversion state. After creation using iconv_open(), the state is in the initial state. Using iconv(3) modifies the descriptor's conversion state. (This implies that a conversion descriptor can not be used in multiple threads simultaneously.) To bring the state back to the initial state, use iconv(3) with NULL as inbuf argument.
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:
The conversion from fromcode to tocode is not supported by the implementation.
This function is available in glibc since version 2.1.
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