- libbson 1.13.1 »
- API Reference

# bson_string_t

String Building Abstraction

## Synopsis

    #include <bson/bson.h>

    typedef struct {
       char *str;
       uint32_t len;
       uint32_t alloc;
    } bson_string_t;

## Description

bson_string_t is an abstraction for building strings. As chunks are added to the string, allocations are performed in powers of two.

This API is useful if you need to build UTF-8 encoded strings.

## Functions

- bson_string_append()
- bson_string_append_c()
- bson_string_append_printf()
- bson_string_append_unichar()
- bson_string_free()
- bson_string_new()
- bson_string_truncate()

## Example

    bson_string_t *str;

    str = bson_string_new (NULL);
    bson_string_append_printf (str, "%d %s %f\n", 0, "some string", 0.123);
    printf ("%s\n", str->str);

    bson_string_free (str, true);

Tip

You can call bson_string_free() with `false` if you would like to take ownership of `str->str`. Some APIs that do this might call `return bson_string_free (str, false);` after building the string.

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