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ldns

Section: C Library Functions (3)
Updated: 30 May 2006
Index Return to Main Contents

NAME

ldns_buffer_limit, ldns_buffer_set_limit, ldns_buffer_capacity, ldns_buffer_set_capacity, ldns_buffer_reserve, ldns_buffer_at, ldns_buffer_begin, ldns_buffer_end, ldns_buffer_current - buffer limits and pointers

SYNOPSIS

#include <stdint.h>
#include <stdbool.h>

#include <ldns/ldns.h>

size_t ldns_buffer_limit(const ldns_buffer *buffer);

void ldns_buffer_set_limit(ldns_buffer *buffer, size_t limit);

size_t ldns_buffer_capacity(const ldns_buffer *buffer);

bool ldns_buffer_set_capacity(ldns_buffer *buffer, size_t capacity);

bool ldns_buffer_reserve(ldns_buffer *buffer, size_t amount);

uint8_t * ldns_buffer_at(const ldns_buffer *buffer, size_t at);

uint8_t * ldns_buffer_begin(const ldns_buffer *buffer);

uint8_t * ldns_buffer_end(const ldns_buffer *buffer);

uint8_t * ldns_buffer_current(const ldns_buffer *buffer);

DESCRIPTION

ldns_buffer_limit(): returns the maximum size of the buffer param[in] buffer .br Returns the size

ldns_buffer_set_limit(): changes the buffer's limit. If the buffer's position is greater than the new limit the position is set to the limit. .br buffer: the buffer .br limit: the new limit

ldns_buffer_capacity(): returns the number of bytes the buffer can hold. .br buffer: the buffer .br Returns the number of bytes

ldns_buffer_set_capacity(): changes the buffer's capacity. The data is reallocated so any pointers to the data may become invalid. The buffer's limit is set to the buffer's new capacity. .br buffer: the buffer .br capacity: the capacity to use .br Returns whether this failed or succeeded

ldns_buffer_reserve(): ensures BUFFER can contain at least AMOUNT more bytes. The buffer's capacity is increased if necessary using buffer_set_capacity().
The buffer's limit is always set to the (possibly increased) capacity. .br buffer: the buffer .br amount: amount to use .br Returns whether this failed or succeeded

ldns_buffer_at(): returns a pointer to the data at the indicated position. .br buffer: the buffer .br at: position .br Returns the pointer to the data

ldns_buffer_begin(): returns a pointer to the beginning of the buffer (the data at position 0). .br buffer: the buffer .br Returns the pointer

ldns_buffer_end(): returns a pointer to the end of the buffer (the data at the buffer's limit). .br buffer: the buffer .br Returns the pointer