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

diff --git a/utf8.c b/utf8.c
index e7ba33c2355d1f4a3ab7b679a3e98dec25e0707d..7c342ff4b6eb2e8c94bb3fa5c86b77b5de9abfae 100644 (file)
--- 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;
 }