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SMART STRING API

The Struct:

    typedef struct {
       char *c;      // data goes here..
       size_t len;     // the current length
       size_t a;    // the allocated size
     } smart_str;

EXAMPLE:

    smart_str *sstr;
    sstr = emalloc(sizeof(smart_str));
    smart_str_sets(sstr, strdup("")); // start it clean.
    .....
    smart_str_free(sstr);
 

    smart_str sstr = {0};
    smart_str_alloc(&sstr, 100);
    smart_str_sets(&sstr, strdup("This is a string"));
    smart_str_free(&sstr);

Creating Memory:

    void smart_str_alloc(smart_str *str, int len, int is_persistant)

EXAMPLE:

    smart_str *sstr;
    sstr = emalloc(sizeof(smart_str));
    smart_str_alloc(sstr, 100);

Initialize:

     void smart_str_sets(smart_str *dest, char *src); 

EXAMPLE:

     smart_str *sstr;
     sstr = emalloc(sizeof(smart_str));
     smart_str_sets(sstr, strdup("This is a string"));     

Closing a String

    void smart_str_0(smart_str *str)    

EXAMPLE:

    smart_str *sstr;
    sstr = emalloc(sizeof(smart_str));

    smart_str_appends(sstr, "Hello World");
    smart_str_0();
    printf("the string is %s", sstr->c);

Add a Character to a string

    smart_str_appendc(smart_str *dest, char c)

EXAMPLE:

    smart_str *sstr;
    char c = "C";

    sstr = emalloc(sizeof(smart_str));
    smart_str_appendc(sstr, c);

Add a string

    smart_str_appends(smart_str *dest, smart_str *add)

    smart_str_appends(smart_str *dest, char *add)

    smart_str_appendl(smart_str *dest, char *add, int n)

EXAMPLE:

    smart_str sstr1 = {0};
    smart_str sstr2 = {0};
    smart_str sstr3 = {0};

    smart_str_appends(&sstr1, "the cat");
    smart_str_appendl(&sstr1, " the dog", 3);

    smart_str_appends(&sstr2, "the cat");
    smart_str_appendl(&sstr2, " the dog", 3);

    smart_str_append(&sstr3, &str1);
    smart_str_append(&sstr3, &str2);

Adding Numbers to a smart string:

    smart_str_append_long(smart_str *dest, long val);

    smart_str_append_unsigned(smart_str *dest, unsigned long val);

    smart_str_append_off_t(smart_str *dest, off_t val);

EXAMPLE:

    smart_str_append_long(sstr, 120);

Free the String:

    smart_str_free(smart_str *str)

Example:

    smart_str *sstr;
    sstr = emalloc(sizeof(smart_str));
    smart_str_sets(*sstr1, strdup("the cat"));
    ... do something ...    

    smart_str_free(sstr);

See Also:

autoallocating sprintf. (with \0 terminated added)

    snprintf(char *buffer, int max_size, char *format, .....);