2  * buffer.c -- generic memory buffer .
13 #include <ldns/buffer.h>
18 	ldns_buffer *buffer = LDNS_MALLOC(ldns_buffer);  in ldns_buffer_new()  local
20 	if (!buffer) {  in ldns_buffer_new()
24 	buffer->_data = (uint8_t *) LDNS_XMALLOC(uint8_t, capacity);  in ldns_buffer_new()
25 	if (!buffer->_data) {  in ldns_buffer_new()
26 		LDNS_FREE(buffer);  in ldns_buffer_new()
30 	buffer->_position = 0;  in ldns_buffer_new()
31 	buffer->_limit = buffer->_capacity = capacity;  in ldns_buffer_new()
32 	buffer->_fixed = 0;  in ldns_buffer_new()
33 	buffer->_status = LDNS_STATUS_OK;  in ldns_buffer_new()
35 	ldns_buffer_invariant(buffer);  in ldns_buffer_new()
37 	return buffer;  in ldns_buffer_new()
41 ldns_buffer_new_frm_data(ldns_buffer *buffer, const void *data, size_t size)  in ldns_buffer_new_frm_data()  argument
45 	buffer->_position = 0;   in ldns_buffer_new_frm_data()
46 	buffer->_limit = buffer->_capacity = size;  in ldns_buffer_new_frm_data()
47 	buffer->_fixed = 0;  in ldns_buffer_new_frm_data()
48 	buffer->_data = LDNS_XMALLOC(uint8_t, size);  in ldns_buffer_new_frm_data()
49 	if(!buffer->_data) {  in ldns_buffer_new_frm_data()
50 		buffer->_status = LDNS_STATUS_MEM_ERR;  in ldns_buffer_new_frm_data()
53 	memcpy(buffer->_data, data, size);  in ldns_buffer_new_frm_data()
54 	buffer->_status = LDNS_STATUS_OK;  in ldns_buffer_new_frm_data()
56 	ldns_buffer_invariant(buffer);  in ldns_buffer_new_frm_data()
60 ldns_buffer_set_capacity(ldns_buffer *buffer, size_t capacity)  in ldns_buffer_set_capacity()  argument
64 	ldns_buffer_invariant(buffer);  in ldns_buffer_set_capacity()
65 	assert(buffer->_position <= capacity);  in ldns_buffer_set_capacity()
66 	assert(!buffer->_fixed);  in ldns_buffer_set_capacity()
68 	data = (uint8_t *) LDNS_XREALLOC(buffer->_data, uint8_t, capacity);  in ldns_buffer_set_capacity()
70 		buffer->_status = LDNS_STATUS_MEM_ERR;  in ldns_buffer_set_capacity()
73 		buffer->_data = data;  in ldns_buffer_set_capacity()
74 		buffer->_limit = buffer->_capacity = capacity;  in ldns_buffer_set_capacity()
80 ldns_buffer_reserve(ldns_buffer *buffer, size_t amount)  in ldns_buffer_reserve()  argument
82 	ldns_buffer_invariant(buffer);  in ldns_buffer_reserve()
83 	if (buffer->_capacity < buffer->_position + amount) {  in ldns_buffer_reserve()
84 		size_t new_capacity = buffer->_capacity * 3 / 2;  in ldns_buffer_reserve()
86 		if (new_capacity < buffer->_position + amount) {  in ldns_buffer_reserve()
87 			new_capacity = buffer->_position + amount;  in ldns_buffer_reserve()
89 		if (!ldns_buffer_set_capacity(buffer, new_capacity)) {  in ldns_buffer_reserve()
90 			buffer->_status = LDNS_STATUS_MEM_ERR;  in ldns_buffer_reserve()
94 	buffer->_limit = buffer->_capacity;  in ldns_buffer_reserve()
99 ldns_buffer_printf(ldns_buffer *buffer, const char *format, ...)  in ldns_buffer_printf()  argument
105 	if (ldns_buffer_status_ok(buffer)) {  in ldns_buffer_printf()
106 		ldns_buffer_invariant(buffer);  in ldns_buffer_printf()
107 		assert(buffer->_limit == buffer->_capacity);  in ldns_buffer_printf()
109 		remaining = ldns_buffer_remaining(buffer);  in ldns_buffer_printf()
111 		written = vsnprintf((char *) ldns_buffer_current(buffer), remaining,  in ldns_buffer_printf()
115 			buffer->_status = LDNS_STATUS_INTERNAL_ERR;  in ldns_buffer_printf()
118 			if (!ldns_buffer_reserve(buffer, (size_t) written + 1)) {  in ldns_buffer_printf()
119 				buffer->_status = LDNS_STATUS_MEM_ERR;  in ldns_buffer_printf()
123 			written = vsnprintf((char *) ldns_buffer_current(buffer),  in ldns_buffer_printf()
124 			    ldns_buffer_remaining(buffer), format, args);  in ldns_buffer_printf()
127 				buffer->_status = LDNS_STATUS_INTERNAL_ERR;  in ldns_buffer_printf()
131 		buffer->_position += written;  in ldns_buffer_printf()
137 ldns_buffer_free(ldns_buffer *buffer)  in ldns_buffer_free()  argument
139 	if (!buffer) {  in ldns_buffer_free()
143 	if (!buffer->_fixed)  in ldns_buffer_free()
144 		LDNS_FREE(buffer->_data);  in ldns_buffer_free()
146 	LDNS_FREE(buffer);  in ldns_buffer_free()
150 ldns_buffer_export(ldns_buffer *buffer)  in ldns_buffer_export()  argument
152 	buffer->_fixed = 1;  in ldns_buffer_export()
153 	return buffer->_data;  in ldns_buffer_export()
157 ldns_bgetc(ldns_buffer *buffer)  in ldns_bgetc()  argument
159 	if (!ldns_buffer_available_at(buffer, buffer->_position, sizeof(uint8_t))) {  in ldns_bgetc()
160 		ldns_buffer_set_position(buffer, ldns_buffer_limit(buffer));  in ldns_bgetc()
161 		/* ldns_buffer_rewind(buffer);*/  in ldns_bgetc()
164 	return (int)ldns_buffer_read_u8(buffer);  in ldns_bgetc()