Manipulating C-strings with multiple null characters in memory -

-

i need search through chunk of memory string of characters, several of these strings have every character null separated, this:
"i. .a.m. .a. .s.t.r.i.n.g"
of '.'s being null characters. problem comes getting memory. i've tried several ways, instance: 

 char* str2;   str2 = (char*)malloc(sizeof(char)*40);     memcpy((void*)str2, "123\0567\09abc", 12);

will put following memory str2 points to: 123.7.9abc..
like
str2 = "123456789\0abcde\054321";
have str2 pointing block of memory looks 123456789.abcde,321 , wherein '.' null character, , ',' actual comma.

so inserting null characters cstrings doesn't work thought did, inserting newline character. encountered similar difficulties trying string library well. separate assignments, like: 

 char* str;      str = (char*)malloc(sizeof(char)*40);    strcpy(str, "123");    strcpy(str+4, "abc");    strcpy(str+8, "abc");

but not preferable, , believe problem lies in understanding of how c-style strings stored in memory. "abc\0123" doesn't go memory 61 62 63 00 31 32 33 (in hex). how stored, , how can store need to?

(i apologize not having set code in blocks, first time posting question, , somehow "four spaced" more difficult can handle apparently. thank you, luchian. see more newlines needed.)

if every other char contains null, have utf-16 encoded strings. process them accordingly , problems disappear.

assuming on windows, utf-16 common, use wchar_t* rather char* hold such strings. , use wide char string processing functions operate on such data. example, use wcscpy rather strcpy , on.


Comments

Post a Comment

Popular posts from this blog

django - How can I change user group without delete record -

-
on website user have 1 group. , user can change group. it's made user.groups.clear() and user.groups.add(new_group) but it's not efficient, because there 2 sql query: delete, insert. how can change group update query? user , group related each other using manytomanyfield . means intersection table exists relating both entities, , if don't specify model map (using through attribute) django creates 1 you. looking @ sources django.contrib.auth.models see that's case. fortunatly, can access intermediary model using through attribute of manager (in case, user.groups.through ). can use regular model. example: >>> alice = user.objects.create_user('alice', 'alice@example.com', 'alicepw') >>> employee = group.objects.create(name='employee') >>> manager = group.objects.create(name='manager') >>> alice.groups.add(employee) >>> alice.groups.all() [<group: employee...
Read more

java - Need to add SOAP security token -

-
i need set custom soap header attribute on jax-ws generated webservice client. case webservice calls must go through proxy server requiring specific token (recieved web request header) present in soap request header. e.g.: 1 carserviceservice service = null; 2 service = new carserviceservice(new url(url), new qname(qname); 3 carserviceendpoint port = service.getcarserviceport(); it seems in line 3 wsdl retrieved , call fails due missing security token. 1 point direction on how done? a detailed example has been mentioned here: creating , deploying jax-ws web service on tomcat 6 this article shows how create , use security token .
Read more

java - EclipseLink JPA Object is not a known entity type -

-
i have strange problem eclipselink , object want persist. have 1 object (keypointlistimpl) stores object keypointimpl in list. persisting keypointimpl objects works great if try persist keypointlistimpl object java.lang.illegalargumentexception says object keypointimpl isn't known entity type. here keypointimpl code: @entity @table(name="keypoints") public class keypointimpl implements keypoint { @id @generatedvalue(strategy = generationtype.identity) private int id; @enumerated(enumtype.string) private detectortype keypointtype; private float x; private float y; private float size; private float angle; private float response; private int octave; private int classid; ... } here keypointlistimpl code: @entity @table(name="keypointlists") public class keypointlistimpl implements keypointlist { @id @generatedvalue(strategy = generationtype.identity) private int id; @onetoone(cascade={ca...
Read more