Re: [Xen-devel] [PATCH v3 19/25] s390/ebcdic: Use size_t to iterate over arrays

[Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>]

On 2/20/19 10:40 AM, Cornelia Huck wrote:
> On Wed, 20 Feb 2019 02:02:26 +0100
> Philippe Mathieu-Daudé <philmd@xxxxxxxxxx> wrote:
> 
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
>> ---
>>  include/hw/s390x/ebcdic.h | 8 ++++----
>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/include/hw/s390x/ebcdic.h b/include/hw/s390x/ebcdic.h
>> index 69a04cab62..d89174e113 100644
>> --- a/include/hw/s390x/ebcdic.h
>> +++ b/include/hw/s390x/ebcdic.h
>> @@ -83,18 +83,18 @@ static const uint8_t ascii2ebcdic[] = {
>>      0x90, 0x3F, 0x3F, 0x3F, 0x3F, 0xEA, 0x3F, 0xFF
>>  };
>>  
>> -static inline void ebcdic_put(uint8_t *p, const char *ascii, int len)
>> +static inline void ebcdic_put(uint8_t *p, const char *ascii, size_t len)
>>  {
>> -    int i;
>> +    size_t i;
>>  
>>      for (i = 0; i < len; i++) {
>>          p[i] = ascii2ebcdic[(uint8_t)ascii[i]];
>>      }
>>  }
>>  
>> -static inline void ascii_put(uint8_t *p, const char *ebcdic, int len)
>> +static inline void ascii_put(uint8_t *p, const char *ebcdic, size_t len)
>>  {
>> -    int i;
>> +    size_t i;
>>  
>>      for (i = 0; i < len; i++) {
>>          p[i] = ebcdic2ascii[(uint8_t)ebcdic[i]];
> 
> Making the passed len parameter a size_t makes sense; but using a
> size_t as an array iterator looks a bit unidiomatic... it's not wrong,
> though.

This is to silent the "-Wsign-conversion -Wsign-compare" warnings...
I am still not sure what is the best to do.

> Acked-by: Cornelia Huck <cohuck@xxxxxxxxxx>

Thanks!

Phil.

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