mirror of https://github.com/grpc/grpc.git
The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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51 lines
1.3 KiB
51 lines
1.3 KiB
#include <stdio.h> |
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#include <stdlib.h> |
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#include <errno.h> |
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#include <iconv.h> |
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static iconv_t s_cd; |
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/* Call iconv_open only once so the benchmark will be faster? */ |
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static void __attribute__ ((constructor)) init_iconv(void) |
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{ |
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
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s_cd = iconv_open("UTF-16LE", "UTF-8"); |
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#else |
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s_cd = iconv_open("UTF-16BE", "UTF-8"); |
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#endif |
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if (s_cd == (iconv_t)-1) { |
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perror("iconv_open"); |
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exit(1); |
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} |
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} |
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/* |
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* Parameters: |
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* - buf8, len8: input utf-8 string |
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* - buf16: buffer to store decoded utf-16 string |
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* - *len16: on entry - utf-16 buffer length in bytes |
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* on exit - length in bytes of valid decoded utf-16 string |
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* Returns: |
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* - 0: success |
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* - >0: error position of input utf-8 string |
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* - -1: utf-16 buffer overflow |
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* LE/BE depends on host |
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*/ |
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int utf8_to16_iconv(const unsigned char *buf8, size_t len8, |
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unsigned short *buf16, size_t *len16) |
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{ |
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size_t ret, len16_save = *len16; |
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const unsigned char *buf8_0 = buf8; |
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ret = iconv(s_cd, (char **)&buf8, &len8, (char **)&buf16, len16); |
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*len16 = len16_save - *len16; |
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if (ret != (size_t)-1) |
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return 0; |
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if (errno == E2BIG) |
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return -1; /* Output buffer full */ |
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return buf8 - buf8_0 + 1; /* EILSEQ, EINVAL, error position */ |
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}
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