bitcoin/cmake/script/GenerateHeaderFromJson.cmake

# Copyright (c) 2023-present The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or https://opensource.org/license/mit/.

cmake_path(GET JSON_SOURCE_PATH STEM json_source_basename)

file(READ ${JSON_SOURCE_PATH} hex_content HEX)
string(REGEX REPLACE "................" "\\0\n" formatted_bytes "${hex_content}")
string(REGEX REPLACE "[^\n][^\n]" "'\\\\x\\0'," formatted_bytes "${formatted_bytes}")

set(header_content
"#include <string_view>

namespace json_tests {
inline constexpr char detail_${json_source_basename}_bytes[] {
${formatted_bytes}
};

inline constexpr std::string_view ${json_source_basename}{std::begin(detail_${json_source_basename}_bytes), std::end(detail_${json_source_basename}_bytes)};
}
")
file(WRITE ${HEADER_PATH} "${header_content}")
cmake: Build `test_bitcoin` executable 2024-08-10 11:06:36 +01:00			`# Copyright (c) 2023-present The Bitcoin Core developers`
			`# Distributed under the MIT software license, see the accompanying`
			`# file COPYING or https://opensource.org/license/mit/.`

build: Minimize I/O operations in GenerateHeaderFromJson.cmake Tested the performance with: > time cmake -DJSON_SOURCE_PATH=src/secp256k1/src/wycheproof/ecdsa_secp256k1_sha256_bitcoin_test.json -DHEADER_PATH=build/after/ecdsa_secp256k1_sha256_bitcoin_test.json -P cmake/script/GenerateHeaderFromJson.cmake Before: > 3.57s user 6.01s system 94% cpu 10.136 total After: > 0.17s user 0.01s system 98% cpu 0.187 total 2024-09-12 20:51:48 +02:00			`cmake_path(GET JSON_SOURCE_PATH STEM json_source_basename)`

cmake: Build `test_bitcoin` executable 2024-08-10 11:06:36 +01:00			`file(READ ${JSON_SOURCE_PATH} hex_content HEX)`
build: Minimize I/O operations in GenerateHeaderFromJson.cmake Tested the performance with: > time cmake -DJSON_SOURCE_PATH=src/secp256k1/src/wycheproof/ecdsa_secp256k1_sha256_bitcoin_test.json -DHEADER_PATH=build/after/ecdsa_secp256k1_sha256_bitcoin_test.json -P cmake/script/GenerateHeaderFromJson.cmake Before: > 3.57s user 6.01s system 94% cpu 10.136 total After: > 0.17s user 0.01s system 98% cpu 0.187 total 2024-09-12 20:51:48 +02:00			`string(REGEX REPLACE "................" "\\0\n" formatted_bytes "${hex_content}")`
build: Use character literals for generated headers to avoid narrowing Use character literals instead of integer hex values (i.e. `'\x5b','\x0a', ...` instead of `0x5b, 0x0a, ...`) for generated headers. This avoids C++11 narrowing warnings in a more concise way than using explicit char casts. Extra whitespace is also removed between elements for brevity. 2024-12-20 14:37:31 +01:00			`string(REGEX REPLACE "[^\n][^\n]" "'\\\\x\\0'," formatted_bytes "${formatted_bytes}")`
cmake: Build `test_bitcoin` executable 2024-08-10 11:06:36 +01:00
build: Minimize I/O operations in GenerateHeaderFromJson.cmake Tested the performance with: > time cmake -DJSON_SOURCE_PATH=src/secp256k1/src/wycheproof/ecdsa_secp256k1_sha256_bitcoin_test.json -DHEADER_PATH=build/after/ecdsa_secp256k1_sha256_bitcoin_test.json -P cmake/script/GenerateHeaderFromJson.cmake Before: > 3.57s user 6.01s system 94% cpu 10.136 total After: > 0.17s user 0.01s system 98% cpu 0.187 total 2024-09-12 20:51:48 +02:00			`set(header_content`
			`"#include <string_view>`
cmake: Build `test_bitcoin` executable 2024-08-10 11:06:36 +01:00
build: Minimize I/O operations in GenerateHeaderFromJson.cmake Tested the performance with: > time cmake -DJSON_SOURCE_PATH=src/secp256k1/src/wycheproof/ecdsa_secp256k1_sha256_bitcoin_test.json -DHEADER_PATH=build/after/ecdsa_secp256k1_sha256_bitcoin_test.json -P cmake/script/GenerateHeaderFromJson.cmake Before: > 3.57s user 6.01s system 94% cpu 10.136 total After: > 0.17s user 0.01s system 98% cpu 0.187 total 2024-09-12 20:51:48 +02:00			`namespace json_tests {`
			`inline constexpr char detail_${json_source_basename}_bytes[] {`
			`${formatted_bytes}`
			`};`
cmake: Build `test_bitcoin` executable 2024-08-10 11:06:36 +01:00
build: Minimize I/O operations in GenerateHeaderFromJson.cmake Tested the performance with: > time cmake -DJSON_SOURCE_PATH=src/secp256k1/src/wycheproof/ecdsa_secp256k1_sha256_bitcoin_test.json -DHEADER_PATH=build/after/ecdsa_secp256k1_sha256_bitcoin_test.json -P cmake/script/GenerateHeaderFromJson.cmake Before: > 3.57s user 6.01s system 94% cpu 10.136 total After: > 0.17s user 0.01s system 98% cpu 0.187 total 2024-09-12 20:51:48 +02:00			`inline constexpr std::string_view ${json_source_basename}{std::begin(detail_${json_source_basename}_bytes), std::end(detail_${json_source_basename}_bytes)};`
			`}`
			`")`
			`file(WRITE ${HEADER_PATH} "${header_content}")`