Re: [Flex-help] EOF handling in flex canners is mysterious to me

[John P. H. <jph...@gm...>]

You should test for EOF only if fread returns 0;  If res is positive, 
you should go with that.  Next time you read, you'll see EOF.

On 14/10/14 14:33, Will Estes wrote:
> static ssize_t custom_input(char *buf, size_t result_max, yyscan_t yyscanner)
>>{
>>     ssize_t res = fread(buf, 1, result_max, yyget_in(yyscanner));
>>
>>     if (feof(yyget_in(yyscanner)) || ferror(yyget_in(yyscanner)))
>>         res = YY_NULL;
>>     if (yydebug)
>>        fprintf(stderr, "custom_input(..., %ld, ...) -> %zd\n", result_max, res);
>>     return res;
>>}