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Article contents:== Outdated egg! This is an egg for CHICKEN 3, the unsupported old release. You're almost certainly looking for [[/eggref/4/iconv|the CHICKEN 4 version of this egg]], if it exists. If it does not exist, there may be equivalent functionality provided by another egg; have a look at the [[https://wiki.call-cc.org/chicken-projects/egg-index-4.html|egg index]]. Otherwise, please consider porting this egg to the current version of CHICKEN. [[tags: eggs iconv charset characters]] == Introduction Allows conversion of multi-byte sequences from one character set (encoding) to another by means of the iconv functionality present in glibc (and thus is probably not very portable). == Examples === Converting <enscript highlight=scheme> (use iconv) ; First we obtain a conversion descriptor. In this case we will convert ; from latin1 to utf-8: (define *desc* (iconv-open "utf-8" "latin1")) ; Read lines from the input, convert them and write them: (let loop ((line (read-line))) (unless (eof-object? line) (display (iconv *desc* line)) (newline) (loop (read-line)))) </enscript> == Authors This egg was created by [[Alejandro Forero Cuervo]]. == License The iconv egg for Chicken Scheme is in the public domain and may be reproduced or copied without permission from its author. Citation of the source is appreciated. == Conversion === iconv-open [procedure] (iconv-open TOCODE FROMCODE) Allocate a conversion descriptor suitable for converting byte sequences from character encoding {{FROMCODE}} (a string) to character encoding {{TOCODE}} (a string). 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. The resulting conversion descriptor can be used with {{iconv}} any number of times. === iconv [procedure] (iconv CD SRC [INVALID [DSTLEN]]) The argument cd must be a conversion descriptor created using the function {{iconv-open}}. {{iconv}} converts the multibyte sequence {{SRC}} (a string) according to the character sets specified when {{CD}} was created. If an invalid character is found (because of an invalid or incomplete multibyte character sequence), one byte is skipped from the input and the string {{INVALID}}, which defaults to "?", is used. {{DSTLEN}} is an integer specifying the initial size for the buffer where the results are stored. The buffer will be dynamically adjusted to hold the entire result. The resulting string is returned (or {{#f}} if the implementation runs out of memory). == Version history ;1.5 : Use of 'foreign-safe-lambda*'. [Kon Lovett] ;1.4 : Links with libiconv when {{(software-version)}} is {{unknown}}. This is the case of Cygwin, which requires libiconv. This was suggested by Dekai Wu. ;1.3 : Links with libiconv on Mac OS X. ;1.2 : Uses callback to allocate result buffer. ;1.1 : First release. Description of your changes:

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