---
name: "RkCvtZen"
section: "3"
platform: "linux"
package: "libcanna1g-dev"
version: "3.7p3-25"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/RkCvtZen"
---

# RkCvtZen(3)

convert ASCII characters and single-width katakana to double-width characters

## NAME

***RkCvtZen*** - convert ASCII characters and single-width katakana to double-width characters

## SYNOPSIS

```
#include <canna/RK.h>
int RkCvtZen(dst, maxdst, src, srclen)
unsigned char *dst;
int maxdst;
unsigned char *src;
int srclen;
```

## DESCRIPTION

*RkCvtZen* converts the *srclen* bytes of ASCII character and single-width katakana data to double-width character, starting at the area *src*.  A null character in *src* is not interpreted as the end of the string.  The conversion result is stored in the area *dst*.  Characters that are not subject to conversion are copied as they area.  The conversion result is truncated to adjust to character boundaries in the EUC code when its byte length exceeds *maxdst* -1.  *dst* is padded with null characters at the end if possible.  EUC code is used to represent both *src* and *dst*.

***NULL*** can be specified in *dst*.  ***NULL*** overrides the entire conversion result.

## RETURN VALUE

This function returns the byte length of the conversion result, or returns ***0*** if the value of *maxdst* is invalid.