Return Styles: Pseud0ch, Terminal, Valhalla, NES, Geocities, Blue Moon.

Pages: 1-

string class for C

Name: Anonymous 2012-05-14 16:25

Design a string ``class'' for C by using structs and function pointers

Name: no 2012-05-14 16:31

no

Name: VIPPER 2012-05-14 16:32

Your not the boss of me now.

Name: Anonymous 2012-05-14 19:04

typedef struct{
char *str;
int len;
}string;

string operator=(string,char *str){
string t;
t.str=str;
t.len=strlen(str);
}

char * operator=(char *,string str){
char *t=malloc(str.len+1);
memcpy(t,str.str,str.len);
t[str.len]=0;
return t;
}

string operator+(string a1,string a2){
string t;
char *tmp=malloc(a1.len+a2.len+2);
memset(tmp,0,a1.len+a2.len+2);
memcpy(tmp,a1.str,a1.len);
memcpy(tmp+strlen(tmp)+1,a2.str,a2.len);
t.len=strlen(tmp);
t.str=tmp;
return tmp;
}

Name: Anonymous 2012-05-14 19:23

typedef struct __string_{
    int length;
    char * value;
    } internal_string, * String;
String new_string(int size){
    String s= (string)malloc(size * sizeof(char) + sizeof(internal_string));
    s->length = size;
    s->value = ((char *)s) + sizeof(internal_string);
    return s;
}
void destroy_string(String s){
    free(s);
}
String add_string(String s1, String s2){
    String s = new_string(s1->length + s2->length);
    memcpy(s->value, s1->value, s1->length);
    memcpy(s->value, s2->value, s2->length);
    return s;
}
#define true 1;
#define false 0;
int equals_string(String s1, String s2){
    char * p1 = s1->value;
    char * p2 = s2->value;
    while(*p1 && *p2){
        if(*p1 != *p2)
            return false;
    }
    if(*p1 || *p2)
        return false;
    return true;
}

Name: Anonymous 2012-05-14 19:26

...
    while(*p1 && *p2){
        if(*p1 != *p2)
            return false;
        ++p1;
        ++p2;
    }
...

ofc

Name: Anonymous 2012-05-14 19:27

...
    memcpy(s->value, s1->value, s1->length);
    memcpy(s->value + s1->length, s2->value, s2->length);
...

Name: Anonymous 2012-05-14 19:44

>>4
C
operator
what in the actual fuck

Name: Anonymous 2012-05-14 19:49

>>1
You know what? I might just do that. But believe me, I will surely not post your homework here when I'm done.

Also, anyone here ever heard of size_t?

Name: matt 2012-05-14 21:18

>>9
no wats dat xD

Name: Anonymous 2012-05-14 22:13

Look into std::basic_string and convert that to structs and this pointers.

Name: Anonymous 2012-05-14 22:13

>>9
size_t is ENTERPRISE BLOAT.

Name: Anonymous 2012-05-14 22:15

ENTERPRISE

Name: Anonymous 2012-05-14 23:00

>>12
No it isn't. It's defined in stddef.h, which is a very small header file. If you don't use size_t for holding the size of an allocated chunk of memory, you're doing it wrong. int, long, unsigned int, unsigned long, etc. are wrong.

Name: Anonymous 2012-05-15 3:39

>>1
and function pointers
Why would you bloat it with function pointers?

Name: Anonymous 2012-05-15 8:16

>>15
Because he's not very intelligent.

Name: Anonymous 2012-05-15 8:37

>>15,16
No, no, no, you see, one strncpy for each character encoding, and multi-byte and fixed-byte strings can live happily together. You obviously don't have experience with large, multi-platform projects where you can't predict the future need of strings and encodings. When you can't control what's fed into your program, you have to take a submissive stance like your mother did last night.

Name: Anonymous 2012-05-15 9:00

>>17
You don't need function pointers to cater for different character encodings.

Name: Anonymous 2012-05-15 9:20

>>17
Yeah you're still a fucking idiot.

Name: bampu pantsu 2012-05-29 4:57

bampu pantsu
Don't change these.
Name: Email:
Entire Thread Thread List
All trademarks and copyrights on this site are owned by their respective parties. All comments and posts are the responsibility of their own posters.
- Tinychan + 2ch Mode -