iconvを使ってNSDataからNSStringを生成する
Oreyonで使ったコードはこんな感じです。元ネタあるような気がするので思い出したら追記
#include <iconv.h> #include <errno.h> #define __iconvBufferLength 1024 +(NSString *)stringWithData:(NSData *)data iconvEncoding:(NSString *)encodingString { iconv_t descriptor = iconv_open("UTF-16//IGNORE", [encodingString UTF8String]); size_t inbytesleft = [data length]; char* inbuf = (char*)[data bytes]; size_t outbytesleft; char* outbuf = malloc(__iconvBufferLength); char* outbyteslength = NULL; NSMutableString *resultString = [NSMutableString string]; errno = E2BIG; while (errno == E2BIG) { outbytesleft = __iconvBufferLength; outbyteslength = outbuf; errno = 0; iconv(descriptor, &inbuf, &inbytesleft, &outbyteslength, &outbytesleft); if (errno == EILSEQ || errno == EINVAL) break; NSString *part = [[[NSString alloc] initWithBytes:outbuf length:__iconvBufferLength-outbytesleft encoding:NSUTF16StringEncoding] autorelease]; [resultString appendString:part]; } iconv_close(descriptor); free(outbuf); return resultString; }
