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-rw-r--r--src/buffer.h116
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diff --git a/src/buffer.h b/src/buffer.h
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+/*
+ * Copyright 2019-2021 OARC, Inc.
+ * Copyright 2017-2018 Akamai Technologies
+ * Copyright 2006-2016 Nominum, Inc.
+ * All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef PERF_BUFFER_H
+#define PERF_BUFFER_H 1
+
+#include <stddef.h>
+
+typedef struct perf_region {
+ void* base;
+ size_t length;
+} perf_region_t;
+
+typedef struct perf_buffer {
+ void* base;
+ size_t length, used, current, active;
+} perf_buffer_t;
+
+#include <assert.h>
+
+#define perf_buffer_init(b, _base, _length) \
+ { \
+ (b)->base = _base; \
+ (b)->length = _length; \
+ (b)->used = 0; \
+ (b)->current = 0; \
+ (b)->active = 0; \
+ }
+
+#define perf_buffer_add(b, n) \
+ { \
+ assert((b)->used + n <= (b)->length); \
+ (b)->used += (n); \
+ }
+
+#define perf_buffer_length(b) ((b)->length)
+
+#define perf_buffer_availablelength(b) ((b)->length - (b)->used)
+
+#define perf_buffer_base(b) ((b)->base)
+
+#define perf_buffer_clear(b) \
+ { \
+ (b)->used = 0; \
+ (b)->current = 0; \
+ (b)->active = 0; \
+ }
+
+#define perf_buffer_putmem(b, base, length) \
+ { \
+ assert(perf_buffer_availablelength(b) >= length); \
+ memcpy(perf_buffer_used(b), base, length); \
+ perf_buffer_add(b, length); \
+ }
+
+#define perf_buffer_putuint8(b, _val) \
+ { \
+ unsigned char* _cp; \
+ uint8_t _val2 = (_val); \
+ assert(perf_buffer_availablelength(b) >= 1U); \
+ _cp = perf_buffer_used(b); \
+ (b)->used += 1U; \
+ _cp[0] = _val2; \
+ }
+
+#define perf_buffer_putuint16(b, _val) \
+ { \
+ unsigned char* _cp; \
+ uint16_t _val2 = (_val); \
+ assert(perf_buffer_availablelength(b) >= 2U); \
+ _cp = perf_buffer_used(b); \
+ (b)->used += 2U; \
+ _cp[0] = _val2 >> 8; \
+ _cp[1] = _val2; \
+ }
+
+#define perf_buffer_putuint32(b, _val) \
+ { \
+ unsigned char* _cp; \
+ uint32_t _val2 = (_val); \
+ assert(perf_buffer_availablelength(b) >= 4U); \
+ _cp = perf_buffer_used(b); \
+ (b)->used += 4U; \
+ _cp[0] = _val2 >> 24; \
+ _cp[1] = _val2 >> 16; \
+ _cp[2] = _val2 >> 8; \
+ _cp[3] = _val2; \
+ }
+
+#define perf_buffer_copyregion(b, r) perf_buffer_putmem(b, (r)->base, (r)->length)
+
+#define perf_buffer_used(b) ((void*)((unsigned char*)(b)->base + (b)->used))
+#define perf_buffer_usedlength(b) ((b)->used)
+#define perf_buffer_usedregion(b, r) \
+ { \
+ (r)->base = (b)->base; \
+ (r)->length = (b)->used; \
+ }
+
+#endif