/proc/self/cwd/pw_varint/varint_c.c

Source (jump to first uncovered line)
// Copyright 2023 The Pigweed Authors
//
// 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
//
//     https://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.

#include "pw_varint/varint.h"

#define VARINT_ENCODE_FUNCTION_BODY(bits)                        \
  size_t written = 0;                                            \
  uint8_t* buffer = (uint8_t*)output;                            \
                                                                 \
  do {                                                           \
    if (written >= output_size_bytes) {                          \
      return 0u;                                                 \
    }                                                            \
    buffer[written++] = pw_varint_EncodeOneByte##bits(&integer); \
  } while (integer != 0u);                                       \
                                                                 \
  buffer[written - 1] &= 0x7f;                                   \
  return written

size_t pw_varint_Encode32(uint32_t integer,
                          void* output,
                          size_t output_size_bytes) {
  VARINT_ENCODE_FUNCTION_BODY(32);
}

size_t pw_varint_Encode64(uint64_t integer,
                          void* output,
                          size_t output_size_bytes) {
  VARINT_ENCODE_FUNCTION_BODY(64);
}

#define VARINT_DECODE_FUNCTION_BODY(bits)                                     \
  uint##bits##_t value = 0;                                                   \
  size_t count = 0;                                                           \
  const uint8_t* buffer = (const uint8_t*)(input);                            \
                                                                              \
  /* Only read to the end of the buffer or largest possible encoded size. */  \
  const size_t max_count =                                                    \
      input_size_bytes < PW_VARINT_MAX_INT##bits##_SIZE_BYTES                 \
          ? input_size_bytes                                                  \
          : PW_VARINT_MAX_INT##bits##_SIZE_BYTES;                             \
                                                                              \
  bool keep_going;                                                            \
  do {                                                                        \
    if (count >= max_count) {                                                 \
      return 0;                                                               \
    }                                                                         \
                                                                              \
    keep_going = pw_varint_DecodeOneByte##bits(buffer[count], count, &value); \
    count += 1;                                                               \
  } while (keep_going);                                                       \
                                                                              \
  *output = value;                                                            \
  return count

size_t pw_varint_Decode32(const void* input,
                          size_t input_size_bytes,
                          uint32_t* output) {
  VARINT_DECODE_FUNCTION_BODY(32);
}

size_t pw_varint_Decode64(const void* input,
                          size_t input_size_bytes,
                          uint64_t* output) {
  VARINT_DECODE_FUNCTION_BODY(64);
}

Line	Count	Source (jump to first uncovered line)
1		// Copyright 2023 The Pigweed Authors
2		//
3		// Licensed under the Apache License, Version 2.0 (the "License"); you may not
4		// use this file except in compliance with the License. You may obtain a copy of
5		// the License at
6		//
7		// https://www.apache.org/licenses/LICENSE-2.0
8		//
9		// Unless required by applicable law or agreed to in writing, software
10		// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11		// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12		// License for the specific language governing permissions and limitations under
13		// the License.
14
15		#include "pw_varint/varint.h"
16
17		#define VARINT_ENCODE_FUNCTION_BODY(bits) \
18	306k	size_t written = 0; \
19	306k	uint8_t* buffer = (uint8_t*)output; \
20	306k	\
21	1.14M	do { \
22	1.14M	if (written >= output_size_bytes) { \
23	0	return 0u; \
24	0	} \
25	1.14M	buffer[written++] = pw_varint_EncodeOneByte##bits(&integer); \
26	1.14M	} while (integer != 0u); \
27	306k	\
28	306k	buffer[written - 1] &= 0x7f; \
29	306k	return written
30
31		size_t pw_varint_Encode32(uint32_t integer,
32		void* output,
33	0	size_t output_size_bytes) {
34	0	VARINT_ENCODE_FUNCTION_BODY(32);
35	0	}
36
37		size_t pw_varint_Encode64(uint64_t integer,
38		void* output,
39	306k	size_t output_size_bytes) {
40	306k	VARINT_ENCODE_FUNCTION_BODY(64);
41	306k	}
42
43		#define VARINT_DECODE_FUNCTION_BODY(bits) \
44	0	uint##bits##_t value = 0; \
45	0	size_t count = 0; \
46	0	const uint8_t* buffer = (const uint8_t*)(input); \
47	0	\
48	0	/* Only read to the end of the buffer or largest possible encoded size. */ \
49	0	const size_t max_count = \
50	0	input_size_bytes < PW_VARINT_MAX_INT##bits##_SIZE_BYTES \
51	0	? input_size_bytes \
52	0	: PW_VARINT_MAX_INT##bits##_SIZE_BYTES; \
53	0	\
54	0	bool keep_going; \
55	0	do { \
56	0	if (count >= max_count) { \
57	0	return 0; \
58	0	} \
59	0	\
60	0	keep_going = pw_varint_DecodeOneByte##bits(buffer[count], count, &value); \
61	0	count += 1; \
62	0	} while (keep_going); \
63	0	\
64	0	*output = value; \
65	0	return count
66
67		size_t pw_varint_Decode32(const void* input,
68		size_t input_size_bytes,
69	0	uint32_t* output) {
70	0	VARINT_DECODE_FUNCTION_BODY(32);
71	0	}
72
73		size_t pw_varint_Decode64(const void* input,
74		size_t input_size_bytes,
75	0	uint64_t* output) {
76	0	VARINT_DECODE_FUNCTION_BODY(64);
77	0	}

Coverage Report

Created: 2025-06-13 06:31