cstring.md

A simple and useful string struct for C

Usage

You just need to include the header cstring.hpp, and use it as follows:

str_find_chr

void test_find_char()
{
    string_t* str = str_create("hello world");
    str_find_chr(str, 'l');    
}

output:

hello world (at pos 2)
  ^
hello world (at pos 3)
   ^
hello world (at pos 9)
         ^
all found 3 pos about char 'l'

str_find_str

void test_find_str()
{
    string_t* s = str_create("helloworld lo nihao hello");
    str_find_str(s, "lo");
}

output:

helloworld lo nihao hello (at pos 3)
   ^
helloworld lo nihao hello (at pos 11)
           ^
helloworld lo nihao hello (at pos 23)
                       ^

str_replace

void test_replace()
{
    string_t* s = str_create("hello world hello");
    str_replace(s, " ", "%20");
    str_print(s);
}

output:

hello%20world%20hello

str_concat

void test_concat()
{
    string_t* s1 = str_create("hello");
    string_t* s2 = str_create("world!world!world!");
    s1 = str_concat(s1, s2);
    str_print(s1); 
}

output:

// string_t dst expand memory (18 -> 44)
helloworld!world!world!

str_split

void test_split()
{
    string_t* s = str_create("hello world ni hao hello");
    char* words[100] = {NULL};
    char* split = " ";
    char** pp = words;
    str_split(s, split, words);
    int idx = 0;
    puts("Words list are shown as follow: ");
    for(int idx = 0; *pp; idx++, pp++) {
        printf("%d) %s\n", idx + 1, *pp);
    }
}

output:

Words list are shown as follow:
1) hello
2) world
3) ni
4) hao
5) hello