40 lines
1.4 KiB
Diff
40 lines
1.4 KiB
Diff
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From 3da8c2850d6589b9fa387ab2a2c87355d1224b1e Mon Sep 17 00:00:00 2001
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From: Sergey Poznyakoff <gray@gnu.org>
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Date: Mon, 14 Jan 2019 13:59:39 +0200
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Subject: [PATCH 49/58] Fix iconv usage.
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Patch by Christian Weisgerber.
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* src/utf8.c (utf8_convert): non-zero return from iconv means failure.
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---
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src/utf8.c | 13 ++++++++++++-
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1 file changed, 12 insertions(+), 1 deletion(-)
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diff --git a/src/utf8.c b/src/utf8.c
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index 95a016d..91476aa 100644
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--- a/src/utf8.c
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+++ b/src/utf8.c
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@@ -81,7 +81,18 @@ utf8_convert (bool to_utf, char const *input, char **output)
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outlen = inlen * MB_LEN_MAX + 1;
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ob = ret = xmalloc (outlen);
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ib = (char ICONV_CONST *) input;
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- if (iconv (cd, &ib, &inlen, &ob, &outlen) == -1)
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+ /* According to POSIX, "if iconv() encounters a character in the input
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+ buffer that is valid, but for which an identical character does not
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+ exist in the target codeset, iconv() shall perform an
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+ implementation-defined conversion on this character." It will "update
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+ the variables pointed to by the arguments to reflect the extent of the
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+ conversion and return the number of non-identical conversions performed".
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+ On error, it returns -1.
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+ In other words, non-zero return always indicates failure, either because
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+ the input was not fully converted, or because it was converted in a
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+ non-reversible way.
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+ */
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+ if (iconv (cd, &ib, &inlen, &ob, &outlen) != 0)
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{
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free (ret);
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return false;
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--
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2.19.1
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