utf8.c: add reencode_string_len() that can handle NULs in string

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/utf8.c b/utf8.c
index e7ba33c235..7c342ff4b6 100644
--- a/utf8.c
+++ b/utf8.c
@@ -468,7 +468,7 @@ int utf8_fprintf(FILE *stream, const char *format, ...)
 #else
 	typedef char * iconv_ibp;
 #endif
-char *reencode_string_iconv(const char *in, size_t insz, iconv_t conv)
+char *reencode_string_iconv(const char *in, size_t insz, iconv_t conv, int *outsz_p)
 {
 	size_t outsz, outalloc;
 	char *out, *outpos;
@@ -502,13 +502,17 @@ char *reencode_string_iconv(const char *in, size_t insz, iconv_t conv)
 		}
 		else {
 			*outpos = '\0';
+			if (outsz_p)
+				*outsz_p = outpos - out;
 			break;
 		}
 	}
 	return out;
 }
 
-char *reencode_string(const char *in, const char *out_encoding, const char *in_encoding)
+char *reencode_string_len(const char *in, int insz,
+			  const char *out_encoding, const char *in_encoding,
+			  int *outsz)
 {
 	iconv_t conv;
 	char *out;
@@ -534,7 +538,7 @@ char *reencode_string(const char *in, const char *out_encoding, const char *in_e
 			return NULL;
 	}
 
-	out = reencode_string_iconv(in, strlen(in), conv);
+	out = reencode_string_iconv(in, insz, conv, outsz);
 	iconv_close(conv);
 	return out;
 }