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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 20:01:36 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 20:01:36 +0000 |
commit | 62e4c68907d8d33709c2c1f92a161dff00b3d5f2 (patch) | |
tree | adbbaf3acf88ea08f6eeec4b75ee98ad3b07fbdc /src/lnav_util.hh | |
parent | Initial commit. (diff) | |
download | lnav-62e4c68907d8d33709c2c1f92a161dff00b3d5f2.tar.xz lnav-62e4c68907d8d33709c2c1f92a161dff00b3d5f2.zip |
Adding upstream version 0.11.2.upstream/0.11.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/lnav_util.hh')
-rw-r--r-- | src/lnav_util.hh | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/src/lnav_util.hh b/src/lnav_util.hh new file mode 100644 index 0000000..5edb537 --- /dev/null +++ b/src/lnav_util.hh @@ -0,0 +1,241 @@ +/** + * Copyright (c) 2007-2012, Timothy Stack + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * * Neither the name of Timothy Stack nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * @file lnav_util.hh + * + * Dumping ground for useful functions with no other home. + */ + +#ifndef lnav_util_hh +#define lnav_util_hh + +#include <future> +#include <iterator> +#include <numeric> +#include <string> +#include <type_traits> +#include <vector> + +#include <fcntl.h> +#include <poll.h> +#include <sys/resource.h> +#include <sys/time.h> +#include <sys/types.h> +#include <time.h> + +#include "base/auto_mem.hh" +#include "base/intern_string.hh" +#include "base/lnav.console.hh" +#include "base/result.h" +#include "byte_array.hh" +#include "config.h" +#include "fmt/format.h" +#include "optional.hpp" +#include "ptimec.hh" +#include "spookyhash/SpookyV2.h" + +#if SIZEOF_OFF_T == 8 +# define FORMAT_OFF_T "%lld" +#elif SIZEOF_OFF_T == 4 +# define FORMAT_OFF_T "%ld" +#else +# error "off_t has unhandled size..." +#endif + +class hasher { +public: + using array_t = byte_array<2, uint64_t>; + static constexpr size_t STRING_SIZE = array_t::STRING_SIZE; + + hasher() { this->h_context.Init(0, 0); } + + hasher& update(const std::string& str) + { + this->h_context.Update(str.data(), str.length()); + + return *this; + } + + hasher& update(const string_fragment& str) + { + this->h_context.Update(str.data(), str.length()); + + return *this; + } + + hasher& update(const char* bits, size_t len) + { + this->h_context.Update(bits, len); + + return *this; + } + + hasher& update(int64_t value) + { + value = SPOOKYHASH_LITTLE_ENDIAN_64(value); + this->h_context.Update(&value, sizeof(value)); + + return *this; + } + + array_t to_array() + { + uint64_t h1; + uint64_t h2; + array_t retval; + + this->h_context.Final(&h1, &h2); + *retval.out(0) = SPOOKYHASH_LITTLE_ENDIAN_64(h1); + *retval.out(1) = SPOOKYHASH_LITTLE_ENDIAN_64(h2); + return retval; + } + + void to_string(auto_buffer& buf) + { + array_t bits = this->to_array(); + + bits.to_string(std::back_inserter(buf)); + } + + std::string to_string() + { + array_t bits = this->to_array(); + return bits.to_string(); + } + + std::string to_uuid_string() + { + array_t bits = this->to_array(); + return bits.to_uuid_string(); + } + +private: + SpookyHash h_context; +}; + +bool change_to_parent_dir(); + +bool next_format(const char* const fmt[], int& index, int& locked_index); + +namespace std { +inline string +to_string(const string& s) +{ + return s; +} +inline string +to_string(const char* s) +{ + return s; +} +} // namespace std + +inline bool +is_glob(const std::string& fn) +{ + return (fn.find('*') != std::string::npos + || fn.find('?') != std::string::npos + || fn.find('[') != std::string::npos); +} + +inline void +rusagesub(const struct rusage& left, + const struct rusage& right, + struct rusage& diff_out) +{ + timersub(&left.ru_utime, &right.ru_utime, &diff_out.ru_utime); + timersub(&left.ru_stime, &right.ru_stime, &diff_out.ru_stime); + diff_out.ru_maxrss = left.ru_maxrss - right.ru_maxrss; + diff_out.ru_ixrss = left.ru_ixrss - right.ru_ixrss; + diff_out.ru_idrss = left.ru_idrss - right.ru_idrss; + diff_out.ru_isrss = left.ru_isrss - right.ru_isrss; + diff_out.ru_minflt = left.ru_minflt - right.ru_minflt; + diff_out.ru_majflt = left.ru_majflt - right.ru_majflt; + diff_out.ru_nswap = left.ru_nswap - right.ru_nswap; + diff_out.ru_inblock = left.ru_inblock - right.ru_inblock; + diff_out.ru_oublock = left.ru_oublock - right.ru_oublock; + diff_out.ru_msgsnd = left.ru_msgsnd - right.ru_msgsnd; + diff_out.ru_msgrcv = left.ru_msgrcv - right.ru_msgrcv; + diff_out.ru_nvcsw = left.ru_nvcsw - right.ru_nvcsw; + diff_out.ru_nivcsw = left.ru_nivcsw - right.ru_nivcsw; +} + +inline void +rusageadd(const struct rusage& left, + const struct rusage& right, + struct rusage& diff_out) +{ + timeradd(&left.ru_utime, &right.ru_utime, &diff_out.ru_utime); + timeradd(&left.ru_stime, &right.ru_stime, &diff_out.ru_stime); + diff_out.ru_maxrss = left.ru_maxrss + right.ru_maxrss; + diff_out.ru_ixrss = left.ru_ixrss + right.ru_ixrss; + diff_out.ru_idrss = left.ru_idrss + right.ru_idrss; + diff_out.ru_isrss = left.ru_isrss + right.ru_isrss; + diff_out.ru_minflt = left.ru_minflt + right.ru_minflt; + diff_out.ru_majflt = left.ru_majflt + right.ru_majflt; + diff_out.ru_nswap = left.ru_nswap + right.ru_nswap; + diff_out.ru_inblock = left.ru_inblock + right.ru_inblock; + diff_out.ru_oublock = left.ru_oublock + right.ru_oublock; + diff_out.ru_msgsnd = left.ru_msgsnd + right.ru_msgsnd; + diff_out.ru_msgrcv = left.ru_msgrcv + right.ru_msgrcv; + diff_out.ru_nvcsw = left.ru_nvcsw + right.ru_nvcsw; + diff_out.ru_nivcsw = left.ru_nivcsw + right.ru_nivcsw; +} + +bool is_dev_null(const struct stat& st); +bool is_dev_null(int fd); + +template<typename A> +struct final_action { // slightly simplified + A act; + final_action(A a) : act{a} {} + ~final_action() { act(); } +}; + +template<typename A> +final_action<A> +finally(A act) // deduce action type +{ + return final_action<A>{act}; +} + +void write_line_to(FILE* outfile, const attr_line_t& al); + +namespace lnav { + +std::string to_json(const std::string& str); +std::string to_json(const lnav::console::user_message& um); +std::string to_json(const attr_line_t& al); + +template<typename T> +Result<T, std::vector<lnav::console::user_message>> from_json( + const std::string& json); + +} // namespace lnav + +#endif |