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[MacOS] Fallback to CFStringGetCSTring if CFStringGetCStringPtr fails.

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This commit is contained in:
John Ralls 2017-10-13 13:45:01 -07:00
parent cd97f93bf7
commit c60226e0a1
2 changed files with 64 additions and 4 deletions
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34
gio/gosxappinfo.c
View File

@ -175,14 +175,44 @@ static gchar *
create_cstr_from_cfstring (CFStringRef str)
{
const gchar *cstr;
CFIndex length = CFStringGetLength (str);
char *buffer = NULL;
if (str == NULL)
return NULL;
cstr = CFStringGetCStringPtr (str, kCFStringEncodingUTF8);
/* CFStringGetCStringPtr returns "NULL if the internal storage of
* theString does not allow [a pointer] to be returned efficiently".
* (Apple's docs don't say what that means). In that case we must
* use CFStringGetCString as a fallback.
*/
if (cstr != NULL)
{
CFRelease (str);
return g_strdup (cstr);
}
buffer = g_malloc0 (length + 1);
/* Start off with a buffer size sufficient for the most likely case
* that the CFString is ASCII so the UTF8 representation will be 1
* byte per code point. Keep trying up to 4 bytes per code point,
* the max allowed by RFC3629.
*/
for (int i = 1; i <= 4; ++i)
{
if (CFStringGetCString (str, buffer, length, kCFStringEncodingUTF8))
{
CFRelease (str);
return buffer;
}
length += length;
buffer = g_realloc (buffer, length + 1);
}
g_free (buffer);
CFRelease (str);
return g_strdup (cstr);
return NULL;
}
static char *

34
gio/gosxcontenttype.c
View File

@ -53,14 +53,44 @@ static gchar *
create_cstr_from_cfstring (CFStringRef str)
{
const gchar *cstr;
CFIndex length = CFStringGetLength (str);
char *buffer = NULL;
if (str == NULL)
return NULL;
cstr = CFStringGetCStringPtr (str, kCFStringEncodingUTF8);
/* CFStringGetCStringPtr returns "NULL if the internal storage of
* theString does not allow [a pointer] to be returned efficiently".
* (Apple's docs don't say what that means). In that case we must
* use CFStringGetCString as a fallback.
*/
if (cstr != NULL)
{
CFRelease (str);
return g_strdup (cstr);
}
buffer = g_malloc0 (length + 1);
/* Start off with a buffer size sufficient for the most likely case
* that the CFString is ASCII so the UTF8 representation will be 1
* byte per code point. Keep trying up to 4 bytes per code point,
* the max allowed by RFC3629.
*/
for (int i = 1; i <= 4; ++i)
{
if (CFStringGetCString (str, buffer, length, kCFStringEncodingUTF8))
{
CFRelease (str);
return buffer;
}
length += length;
buffer = g_realloc (buffer, length + 1);
}
g_free (buffer);
CFRelease (str);
return g_strdup (cstr);
return NULL;
}
/*< internal >