Re: good example of unserialization fundamentals?

Thanks for your response. I do follow the concept of macros (and my IDE expands them for me if I need), however, I just want to confirm that it's OK to be using these in a *recursive function*? I'm aware from S. Golemon's book that these (deeply nested) macros also have the effect of incrementing refcounts and such. For instance, I'm sure the RETURN_* macros will break your code if you don't have a zval *return_value defined in the current scope. Are there other caveats or heuristic rules to avoid abusing these macros? OH, and perhaps I forgot to ask with my original post. Can anyone point me to a good example of a function that takes some userland input and recursively interprets it as possibly nested arrays or objects? I've been looking at php_json_decode_ex[0] but it is allocating and freeing memory for utf16/8 converters and JSON_Parser_structs and so on. [0] http://lxr.php.net/xref/PHP_5_6/ext/json/json.c#683 On Wed, Sep 30, 2015 at 1:58 PM, Sean DuBois <sean@siobud.com> wrote: > On Wed, Sep 30, 2015 at 01:39:26PM -0700, j adams wrote: > > I have completed a first draft of serialization functionality which is > > intended to be an updated to amfext. It's on github[0] if anyone is > > interested. I would now like to write all the unserialization routines > and > > would like some suggestions from experienced php devs. I've been reading > > Sara Golemon's book, but am still a little unsure. > > > > In particular, I want my userland function, amf_decode to accept as a > > parameter a string (and possibly other args). This is not so difficult > but > > I must call upon another function, php_amf_decode, which needs to be able > > to handle recursive calls. > > > > Something like this: > > > > // userland function > > static PHP_FUNCTION(amf_decode) { > > char *buf; // char buffer, contains serialize data string > > int buf_len, buf_cursor=0; // the length of the buffer > > long flags = 0; > > > > if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &buf, > > &buf_len, &flags) == FAILURE) { > > return; > > } > > > > if (!buf_len) { > > RETURN_NULL(); > > } > > > > php_amf_decode(return_value, buf, buf_len, &buf_cursor, flags > > TSRMLS_CC); > > } > > > > // proposed recursive decoding function > > PHP_AMF_API void php_amf_decode(zval *return_value, char *buf, int > buf_len, > > int *buf_cursor, long flags TSRMLS_DC) > > { > > > > // is it safe to use these macros in this recursive function? > > RETVAL_BOOL(1); > > > > // or this > > RETURN_LONG(42); > > > > > > } > > > > > > [0] https://github.com/sneakyimp/amfext > > Yep those are safe! > > RETVAL_* expands out so you don't have to repeat the variable > return_value > ZVAL_LONG(return_value, l) > > RETURN_* expands out so you don't have to call return OR specify the > variable return_value > ZVAL_LONG(return_value, l) > return; > > Here they are in 5.6 > http://lxr.php.net/xref/PHP_5_6/Zend/zend_API.h#618 > --- > > A great tool to look these things up quickly is lxr, sure beats grep! > > > http://lxr.php.net/search?q=&defs=RETURN_LONG&refs=&path=&hist=&project=PHP_5_6 >