Alex Henrie : advapi32: Remove always-true if statements from RegEnumValue [AW].
Module: wine Branch: master Commit: 18b7ec94796ed09bef5337e0b02ea374d86de262 URL: http://source.winehq.org/git/wine.git/?a=commit;h=18b7ec94796ed09bef5337e0b0... Author: Alex Henrie <alexhenrie24(a)gmail.com> Date: Tue Oct 6 21:06:23 2015 -0600 advapi32: Remove always-true if statements from RegEnumValue[AW]. Signed-off-by: Alex Henrie <alexhenrie24(a)gmail.com> --- dlls/advapi32/registry.c | 164 ++++++++++++++++++++++------------------------- 1 file changed, 76 insertions(+), 88 deletions(-) diff --git a/dlls/advapi32/registry.c b/dlls/advapi32/registry.c index f988c0e..4820b33 100644 --- a/dlls/advapi32/registry.c +++ b/dlls/advapi32/registry.c @@ -1940,53 +1940,45 @@ LSTATUS WINAPI RegEnumValueW( HKEY hkey, DWORD index, LPWSTR value, LPDWORD val_ status = NtEnumerateValueKey( hkey, index, KeyValueFullInformation, buffer, total_size, &total_size ); - if (status && status != STATUS_BUFFER_OVERFLOW) goto done; - if (value || data) + /* retry with a dynamically allocated buffer */ + while (status == STATUS_BUFFER_OVERFLOW) { - /* retry with a dynamically allocated buffer */ - while (status == STATUS_BUFFER_OVERFLOW) - { - if (buf_ptr != buffer) heap_free( buf_ptr ); - if (!(buf_ptr = heap_alloc( total_size ))) - return ERROR_NOT_ENOUGH_MEMORY; - info = (KEY_VALUE_FULL_INFORMATION *)buf_ptr; - status = NtEnumerateValueKey( hkey, index, KeyValueFullInformation, - buf_ptr, total_size, &total_size ); - } + if (buf_ptr != buffer) heap_free( buf_ptr ); + if (!(buf_ptr = heap_alloc( total_size ))) + return ERROR_NOT_ENOUGH_MEMORY; + info = (KEY_VALUE_FULL_INFORMATION *)buf_ptr; + status = NtEnumerateValueKey( hkey, index, KeyValueFullInformation, + buf_ptr, total_size, &total_size ); + } - if (status) goto done; + if (status) goto done; - if (value) + if (info->NameLength/sizeof(WCHAR) >= *val_count) + { + status = STATUS_BUFFER_OVERFLOW; + goto overflow; + } + memcpy( value, info->Name, info->NameLength ); + *val_count = info->NameLength / sizeof(WCHAR); + value[*val_count] = 0; + + if (data) + { + if (total_size - info->DataOffset > *count) { - if (info->NameLength/sizeof(WCHAR) >= *val_count) - { - status = STATUS_BUFFER_OVERFLOW; - goto overflow; - } - memcpy( value, info->Name, info->NameLength ); - *val_count = info->NameLength / sizeof(WCHAR); - value[*val_count] = 0; + status = STATUS_BUFFER_OVERFLOW; + goto overflow; } - - if (data) + memcpy( data, buf_ptr + info->DataOffset, total_size - info->DataOffset ); + if (total_size - info->DataOffset <= *count-sizeof(WCHAR) && is_string(info->Type)) { - if (total_size - info->DataOffset > *count) - { - status = STATUS_BUFFER_OVERFLOW; - goto overflow; - } - memcpy( data, buf_ptr + info->DataOffset, total_size - info->DataOffset ); - if (total_size - info->DataOffset <= *count-sizeof(WCHAR) && is_string(info->Type)) - { - /* if the type is REG_SZ and data is not 0-terminated - * and there is enough space in the buffer NT appends a \0 */ - WCHAR *ptr = (WCHAR *)(data + total_size - info->DataOffset); - if (ptr > (WCHAR *)data && ptr[-1]) *ptr = 0; - } + /* if the type is REG_SZ and data is not 0-terminated + * and there is enough space in the buffer NT appends a \0 */ + WCHAR *ptr = (WCHAR *)(data + total_size - info->DataOffset); + if (ptr > (WCHAR *)data && ptr[-1]) *ptr = 0; } } - else status = STATUS_SUCCESS; overflow: if (type) *type = info->Type; @@ -2025,74 +2017,70 @@ LSTATUS WINAPI RegEnumValueA( HKEY hkey, DWORD index, LPSTR value, LPDWORD val_c status = NtEnumerateValueKey( hkey, index, KeyValueFullInformation, buffer, total_size, &total_size ); - if (status && status != STATUS_BUFFER_OVERFLOW) goto done; /* we need to fetch the contents for a string type even if not requested, * because we need to compute the length of the ASCII string. */ - if (value || data || is_string(info->Type)) + + /* retry with a dynamically allocated buffer */ + while (status == STATUS_BUFFER_OVERFLOW) { - /* retry with a dynamically allocated buffer */ - while (status == STATUS_BUFFER_OVERFLOW) - { - if (buf_ptr != buffer) heap_free( buf_ptr ); - if (!(buf_ptr = heap_alloc( total_size ))) - return ERROR_NOT_ENOUGH_MEMORY; - info = (KEY_VALUE_FULL_INFORMATION *)buf_ptr; - status = NtEnumerateValueKey( hkey, index, KeyValueFullInformation, - buf_ptr, total_size, &total_size ); - } + if (buf_ptr != buffer) heap_free( buf_ptr ); + if (!(buf_ptr = heap_alloc( total_size ))) + return ERROR_NOT_ENOUGH_MEMORY; + info = (KEY_VALUE_FULL_INFORMATION *)buf_ptr; + status = NtEnumerateValueKey( hkey, index, KeyValueFullInformation, + buf_ptr, total_size, &total_size ); + } - if (status) goto done; + if (status) goto done; - if (is_string(info->Type)) + if (is_string(info->Type)) + { + DWORD len; + RtlUnicodeToMultiByteSize( &len, (WCHAR *)(buf_ptr + info->DataOffset), + total_size - info->DataOffset ); + if (data && len) { - DWORD len; - RtlUnicodeToMultiByteSize( &len, (WCHAR *)(buf_ptr + info->DataOffset), - total_size - info->DataOffset ); - if (data && len) + if (len > *count) status = STATUS_BUFFER_OVERFLOW; + else { - if (len > *count) status = STATUS_BUFFER_OVERFLOW; - else - { - RtlUnicodeToMultiByteN( (char*)data, len, NULL, (WCHAR *)(buf_ptr + info->DataOffset), - total_size - info->DataOffset ); - /* if the type is REG_SZ and data is not 0-terminated - * and there is enough space in the buffer NT appends a \0 */ - if (len < *count && data[len-1]) data[len] = 0; - } + RtlUnicodeToMultiByteN( (char*)data, len, NULL, (WCHAR *)(buf_ptr + info->DataOffset), + total_size - info->DataOffset ); + /* if the type is REG_SZ and data is not 0-terminated + * and there is enough space in the buffer NT appends a \0 */ + if (len < *count && data[len-1]) data[len] = 0; } - info->DataLength = len; - } - else if (data) - { - if (total_size - info->DataOffset > *count) status = STATUS_BUFFER_OVERFLOW; - else memcpy( data, buf_ptr + info->DataOffset, total_size - info->DataOffset ); } + info->DataLength = len; + } + else if (data) + { + if (total_size - info->DataOffset > *count) status = STATUS_BUFFER_OVERFLOW; + else memcpy( data, buf_ptr + info->DataOffset, total_size - info->DataOffset ); + } - if (value && !status) - { - DWORD len; + if (!status) + { + DWORD len; - RtlUnicodeToMultiByteSize( &len, info->Name, info->NameLength ); - if (len >= *val_count) - { - status = STATUS_BUFFER_OVERFLOW; - if (*val_count) - { - len = *val_count - 1; - RtlUnicodeToMultiByteN( value, len, NULL, info->Name, info->NameLength ); - value[len] = 0; - } - } - else + RtlUnicodeToMultiByteSize( &len, info->Name, info->NameLength ); + if (len >= *val_count) + { + status = STATUS_BUFFER_OVERFLOW; + if (*val_count) { + len = *val_count - 1; RtlUnicodeToMultiByteN( value, len, NULL, info->Name, info->NameLength ); value[len] = 0; - *val_count = len; } } + else + { + RtlUnicodeToMultiByteN( value, len, NULL, info->Name, info->NameLength ); + value[len] = 0; + *val_count = len; + } } - else status = STATUS_SUCCESS; if (type) *type = info->Type; if (count) *count = info->DataLength;
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Alexandre Julliard