72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
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/*
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* Copyright 2019 AT&T Intellectual Property
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* This source code is part of the near-RT RIC (RAN Intelligent Controller)
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* platform project (RICP).
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*/
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#include <asn_internal.h>
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ssize_t
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asn__format_to_callback(int (*cb)(const void *, size_t, void *key), void *key,
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const char *fmt, ...) {
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char scratch[64];
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char *buf = scratch;
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size_t buf_size = sizeof(scratch);
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int wrote;
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int cb_ret;
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do {
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va_list args;
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va_start(args, fmt);
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wrote = vsnprintf(buf, buf_size, fmt, args);
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if(wrote < (ssize_t)buf_size) {
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if(wrote < 0) {
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if(buf != scratch) FREEMEM(buf);
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va_end(args);
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return -1;
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}
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break;
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}
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buf_size <<= 1;
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if(buf == scratch) {
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buf = MALLOC(buf_size);
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if(!buf) return -1;
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} else {
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void *p = REALLOC(buf, buf_size);
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if(!p) {
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FREEMEM(buf);
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return -1;
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}
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buf = p;
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}
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} while(1);
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cb_ret = cb(buf, wrote, key);
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if(buf != scratch) FREEMEM(buf);
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if(cb_ret < 0) {
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return -1;
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}
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return wrote;
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}
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