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scm_to_stringn: Avoid passing NULL to c_strcasecmp.

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Reported by Massimiliano Gubinelli <m.gubinelli@gmail.com> in
<https://lists.gnu.org/archive/html/guile-user/2019-05/msg00070.html>.

* libguile/strings.c (scm_to_stringn): Check for (encoding == NULL)
before passing it to 'c_strcasecmp'.  Eliminate redundant 'enc'
variable.
This commit is contained in:
Mark H Weaver 2019-05-29 15:31:42 -04:00
parent 75f3ba7759
commit a23ee74fab
1 changed files with 5 additions and 6 deletions
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11
libguile/strings.c
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@ -2190,11 +2190,13 @@ scm_to_stringn (SCM str, size_t *lenp, const char *encoding,
char *buf;
size_t ilen, len, i;
int ret;
const char *enc;
if (!scm_is_string (str))
scm_wrong_type_arg_msg (NULL, 0, str, "string");
if (encoding == NULL)
encoding = "ISO-8859-1";
if (c_strcasecmp (encoding, "UTF-8") == 0)
/* This is the most common case--e.g., when calling libc bindings
while using a UTF-8 locale. */
@ -2242,13 +2244,10 @@ scm_to_stringn (SCM str, size_t *lenp, const char *encoding,
buf = NULL;
len = 0;
enc = encoding;
if (enc == NULL)
enc = "ISO-8859-1";
if (scm_i_is_narrow_string (str))
{
ret = mem_iconveh (scm_i_string_chars (str), ilen,
"ISO-8859-1", enc,
"ISO-8859-1", encoding,
(enum iconv_ilseq_handler) handler, NULL,
&buf, &len);
@ -2261,7 +2260,7 @@ scm_to_stringn (SCM str, size_t *lenp, const char *encoding,
}
else
{
buf = u32_conv_to_encoding (enc,
buf = u32_conv_to_encoding (encoding,
(enum iconv_ilseq_handler) handler,
(scm_t_uint32 *) scm_i_string_wide_chars (str),
ilen,