431 lines
14 KiB
C
431 lines
14 KiB
C
/*
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* This file Copyright (C) 2009-2017 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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*/
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#pragma once
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#include <inttypes.h>
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#include <stdarg.h>
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#include <stddef.h> /* size_t */
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#include <time.h> /* time_t */
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#include "tr-macros.h"
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TR_BEGIN_DECLS
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/***
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****
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***/
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struct evbuffer;
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struct event;
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struct timeval;
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struct tr_error;
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/**
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* @addtogroup utils Utilities
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* @{
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*/
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char const* tr_strip_positional_args(char const* fmt);
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#if !defined(_)
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#if defined(HAVE_LIBINTL_H) && !defined(__APPLE__)
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#include <libintl.h>
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#define _(a) gettext(a)
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#else
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#define _(a) (a)
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#endif
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#endif
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/* #define DISABLE_GETTEXT */
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#ifndef DISABLE_GETTEXT
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#if defined(_WIN32) || defined(TR_LIGHTWEIGHT)
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#define DISABLE_GETTEXT
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#endif
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#endif
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#ifdef DISABLE_GETTEXT
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#undef _
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#define _(a) tr_strip_positional_args(a)
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#endif
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/****
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*****
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****/
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#define TR_N_ELEMENTS(ary) (sizeof(ary) / sizeof(*(ary)))
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char const* tr_get_mime_type_for_filename(char const* filename);
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/**
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* @brief Rich Salz's classic implementation of shell-style pattern matching for ?, \, [], and * characters.
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* @return 1 if the pattern matches, 0 if it doesn't, or -1 if an error occured
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*/
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bool tr_wildmat(char const* text, char const* pattern) TR_GNUC_NONNULL(1, 2);
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/**
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* @brief Loads a file and returns its contents.
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* On failure, NULL is returned and errno is set.
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*/
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uint8_t* tr_loadFile(char const* filename, size_t* size, struct tr_error** error) TR_GNUC_MALLOC TR_GNUC_NONNULL(1);
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/** @brief build a filename from a series of elements using the
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platform's correct directory separator. */
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char* tr_buildPath(char const* first_element, ...) TR_GNUC_NULL_TERMINATED TR_GNUC_MALLOC;
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/**
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* @brief Get available disk space (in bytes) for the specified folder.
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* @return zero or positive integer on success, -1 in case of error.
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*/
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int64_t tr_getDirFreeSpace(char const* path);
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/**
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* @brief Convenience wrapper around timer_add() to have a timer wake up in a number of seconds and microseconds
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* @param timer the timer to set
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* @param seconds seconds to wait
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* @param microseconds microseconds to wait
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*/
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void tr_timerAdd(struct event* timer, int seconds, int microseconds) TR_GNUC_NONNULL(1);
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/**
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* @brief Convenience wrapper around timer_add() to have a timer wake up in a number of milliseconds
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* @param timer the timer to set
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* @param milliseconds milliseconds to wait
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*/
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void tr_timerAddMsec(struct event* timer, int milliseconds) TR_GNUC_NONNULL(1);
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/** @brief return the current date in milliseconds */
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uint64_t tr_time_msec(void);
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/** @brief sleep the specified number of milliseconds */
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void tr_wait_msec(long int delay_milliseconds);
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/**
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* @brief make a copy of 'str' whose non-utf8 content has been corrected or stripped
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* @return a newly-allocated string that must be freed with tr_free()
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* @param str the string to make a clean copy of
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* @param len the length of the string to copy. If -1, the entire string is used.
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*/
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char* tr_utf8clean(char const* str, size_t len) TR_GNUC_MALLOC;
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#ifdef _WIN32
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char* tr_win32_native_to_utf8(wchar_t const* text, int text_size);
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char* tr_win32_native_to_utf8_ex(
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wchar_t const* text,
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int text_size,
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int extra_chars_before,
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int extra_chars_after,
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int* real_result_size);
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wchar_t* tr_win32_utf8_to_native(char const* text, int text_size);
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wchar_t* tr_win32_utf8_to_native_ex(
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char const* text,
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int text_size,
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int extra_chars_before,
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int extra_chars_after,
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int* real_result_size);
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char* tr_win32_format_message(uint32_t code);
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void tr_win32_make_args_utf8(int* argc, char*** argv);
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int tr_main_win32(int argc, char** argv, int (*real_main)(int, char**));
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#define tr_main(...) \
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main_impl(__VA_ARGS__); \
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int main(int argc, char* argv[]) \
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{ \
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return tr_main_win32(argc, argv, &main_impl); \
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} \
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int main_impl(__VA_ARGS__)
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#else
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#define tr_main main
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#endif
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/***
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****
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***/
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/** @brief Portability wrapper around malloc() in which `0' is a safe argument */
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void* tr_malloc(size_t size);
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/** @brief Portability wrapper around calloc() in which `0' is a safe argument */
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void* tr_malloc0(size_t size);
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/** @brief Portability wrapper around reallocf() in which `0' is a safe argument */
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void* tr_realloc(void* p, size_t size);
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/** @brief Portability wrapper around free() in which `NULL' is a safe argument */
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void tr_free(void* p);
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/** @brief Free pointers in a NULL-terminated array (the array itself is not freed) */
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void tr_free_ptrv(void* const* p);
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/**
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* @brief make a newly-allocated copy of a chunk of memory
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* @param src the memory to copy
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* @param byteCount the number of bytes to copy
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* @return a newly-allocated copy of `src' that can be freed with tr_free()
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*/
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void* tr_memdup(void const* src, size_t byteCount);
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#define tr_new(struct_type, n_structs) ((struct_type*)tr_malloc(sizeof(struct_type) * (size_t)(n_structs)))
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#define tr_new0(struct_type, n_structs) ((struct_type*)tr_malloc0(sizeof(struct_type) * (size_t)(n_structs)))
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#define tr_renew(struct_type, mem, n_structs) ((struct_type*)tr_realloc((mem), sizeof(struct_type) * (size_t)(n_structs)))
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/**
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* @brief make a newly-allocated copy of a substring
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* @param in is a void* so that callers can pass in both signed & unsigned without a cast
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* @param len length of the substring to copy. if a length less than zero is passed in, strlen(len) is used
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* @return a newly-allocated copy of `in' that can be freed with tr_free()
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*/
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char* tr_strndup(void const* in, size_t len) TR_GNUC_MALLOC;
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/**
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* @brief make a newly-allocated copy of a string
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* @param in is a void* so that callers can pass in both signed & unsigned without a cast
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* @return a newly-allocated copy of `in' that can be freed with tr_free()
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*/
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char* tr_strdup(void const* in);
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/**
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* @brief like strcmp() but gracefully handles NULL strings
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*/
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int tr_strcmp0(char const* str1, char const* str2);
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static inline bool tr_str_is_empty(char const* value)
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{
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return value == NULL || *value == '\0';
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}
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char* evbuffer_free_to_str(struct evbuffer* buf, size_t* result_len);
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/** @brief similar to bsearch() but returns the index of the lower bound */
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int tr_lowerBound(
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void const* key,
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void const* base,
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size_t nmemb,
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size_t size,
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tr_voidptr_compare_func compar,
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bool* exact_match) TR_GNUC_HOT TR_GNUC_NONNULL(1, 5, 6);
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/** @brief moves the best k items to the first slots in the array. O(n) */
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void tr_quickfindFirstK(void* base, size_t nmemb, size_t size, tr_voidptr_compare_func compar, size_t k);
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/**
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* @brief sprintf() a string into a newly-allocated buffer large enough to hold it
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* @return a newly-allocated string that can be freed with tr_free()
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*/
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char* tr_strdup_printf(char const* fmt, ...) TR_GNUC_MALLOC TR_GNUC_PRINTF(1, 2);
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char* tr_strdup_vprintf(char const* fmt, va_list args) TR_GNUC_MALLOC TR_GNUC_PRINTF(1, 0);
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/** @brief Portability wrapper for strlcpy() that uses the system implementation if available */
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size_t tr_strlcpy(void* dst, void const* src, size_t siz);
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/** @brief Portability wrapper for snprintf() that uses the system implementation if available */
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int tr_snprintf(void* buf, size_t buflen, char const* fmt, ...) TR_GNUC_PRINTF(3, 4) TR_GNUC_NONNULL(1, 3);
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/** @brief Convenience wrapper around strerorr() guaranteed to not return NULL
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@param errnum the error number to describe */
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char const* tr_strerror(int errnum);
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/** @brief strips leading and trailing whitspace from a string
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@return the stripped string */
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char* tr_strstrip(char* str);
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/** @brief Returns true if the string ends with the specified case-insensitive suffix */
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bool tr_str_has_suffix(char const* str, char const* suffix);
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/** @brief Portability wrapper for memmem() that uses the system implementation if available */
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char const* tr_memmem(char const* haystack, size_t haystack_len, char const* needle, size_t needle_len);
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/** @brief Portability wrapper for strcasestr() that uses the system implementation if available */
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char const* tr_strcasestr(char const* haystack, char const* needle);
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/** @brief Portability wrapper for strsep() that uses the system implementation if available */
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char* tr_strsep(char** str, char const* delim);
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/** @brief Concatenates array of strings with delimiter in between elements */
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char* tr_strjoin(char const* const* arr, size_t len, char const* delim);
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/***
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****
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***/
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int compareInt(void const* va, void const* vb);
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void tr_binary_to_hex(void const* input, void* output, size_t byte_length) TR_GNUC_NONNULL(1, 2);
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void tr_hex_to_binary(void const* input, void* output, size_t byte_length) TR_GNUC_NONNULL(1, 2);
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/** @brief convenience function to determine if an address is an IP address (IPv4 or IPv6) */
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bool tr_addressIsIP(char const* address);
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/** @brief return true if the url is a http or https or UDP url that Transmission understands */
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bool tr_urlIsValidTracker(char const* url);
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/** @brief return true if the url is a [ http, https, ftp, sftp ] url that Transmission understands */
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bool tr_urlIsValid(char const* url, size_t url_len);
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/** @brief parse a URL into its component parts
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@return True on success or false if an error occurred */
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bool tr_urlParse(char const* url, size_t url_len, char** setme_scheme, char** setme_host, int* setme_port, char** setme_path)
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TR_GNUC_NONNULL(1);
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/** @brief return TR_RATIO_NA, TR_RATIO_INF, or a number in [0..1]
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@return TR_RATIO_NA, TR_RATIO_INF, or a number in [0..1] */
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double tr_getRatio(uint64_t numerator, uint64_t denominator);
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/**
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* @brief Given a string like "1-4" or "1-4,6,9,14-51", this returns a
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* newly-allocated array of all the integers in the set.
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* @return a newly-allocated array of integers that must be freed with tr_free(),
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* or NULL if a fragment of the string can't be parsed.
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*
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* For example, "5-8" will return [ 5, 6, 7, 8 ] and setmeCount will be 4.
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*/
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int* tr_parseNumberRange(char const* str, size_t str_len, int* setmeCount) TR_GNUC_MALLOC TR_GNUC_NONNULL(1);
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/**
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* @brief truncate a double value at a given number of decimal places.
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*
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* this can be used to prevent a printf() call from rounding up:
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* call with the decimal_places argument equal to the number of
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* decimal places in the printf()'s precision:
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*
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* - printf("%.2f%%", 99.999) ==> "100.00%"
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*
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* - printf("%.2f%%", tr_truncd(99.999, 2)) ==> "99.99%"
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* ^ ^
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* | These should match |
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* +------------------------+
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*/
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double tr_truncd(double x, int decimal_places);
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/* return a percent formatted string of either x.xx, xx.x or xxx */
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char* tr_strpercent(char* buf, double x, size_t buflen);
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/**
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* @param buf the buffer to write the string to
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* @param buflen buf's size
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* @param ratio the ratio to convert to a string
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* @param infinity the string represntation of "infinity"
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*/
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char* tr_strratio(char* buf, size_t buflen, double ratio, char const* infinity) TR_GNUC_NONNULL(1, 4);
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/** @brief Portability wrapper for localtime_r() that uses the system implementation if available */
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struct tm* tr_localtime_r(time_t const* _clock, struct tm* _result);
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/** @brief Portability wrapper for gmtime_r() that uses the system implementation if available */
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struct tm* tr_gmtime_r(time_t const* _clock, struct tm* _result);
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/** @brief Portability wrapper for gettimeofday(), with tz argument dropped */
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int tr_gettimeofday(struct timeval* tv);
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/**
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* @brief move a file
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* @return `True` on success, `false` otherwise (with `error` set accordingly).
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*/
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bool tr_moveFile(char const* oldpath, char const* newpath, struct tr_error** error) TR_GNUC_NONNULL(1, 2);
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/** @brief convenience function to remove an item from an array */
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void tr_removeElementFromArray(void* array, size_t index_to_remove, size_t sizeof_element, size_t nmemb);
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/***
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****
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***/
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/** @brief Private libtransmission variable that's visible only for inlining in tr_time() */
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extern time_t __tr_current_time;
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/**
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* @brief very inexpensive form of time(NULL)
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* @return the current epoch time in seconds
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*
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* This function returns a second counter that is updated once per second.
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* If something blocks the libtransmission thread for more than a second,
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* that counter may be thrown off, so this function is not guaranteed
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* to always be accurate. However, it is *much* faster when 100% accuracy
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* isn't needed
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*/
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static inline time_t tr_time(void)
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{
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return __tr_current_time;
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}
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/** @brief Private libtransmission function to update tr_time()'s counter */
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static inline void tr_timeUpdate(time_t now)
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{
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__tr_current_time = now;
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}
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/** @brief Portability wrapper for htonll() that uses the system implementation if available */
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uint64_t tr_htonll(uint64_t);
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/** @brief Portability wrapper for htonll() that uses the system implementation if available */
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uint64_t tr_ntohll(uint64_t);
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/***
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****
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***/
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/* example: tr_formatter_size_init(1024, _("KiB"), _("MiB"), _("GiB"), _("TiB")); */
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void tr_formatter_size_init(size_t kilo, char const* kb, char const* mb, char const* gb, char const* tb);
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void tr_formatter_speed_init(size_t kilo, char const* kb, char const* mb, char const* gb, char const* tb);
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void tr_formatter_mem_init(size_t kilo, char const* kb, char const* mb, char const* gb, char const* tb);
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extern size_t tr_speed_K;
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extern size_t tr_mem_K;
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extern size_t tr_size_K;
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/* format a speed from KBps into a user-readable string. */
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char* tr_formatter_speed_KBps(char* buf, double KBps, size_t buflen);
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/* format a memory size from bytes into a user-readable string. */
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char* tr_formatter_mem_B(char* buf, size_t bytes, size_t buflen);
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/* format a memory size from MB into a user-readable string. */
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static inline char* tr_formatter_mem_MB(char* buf, double MBps, size_t buflen)
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{
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return tr_formatter_mem_B(buf, (size_t)(MBps * tr_mem_K * tr_mem_K), buflen);
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}
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/* format a file size from bytes into a user-readable string. */
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char* tr_formatter_size_B(char* buf, size_t bytes, size_t buflen);
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void tr_formatter_get_units(void* dict);
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/***
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****
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***/
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/** @brief Check if environment variable exists. */
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bool tr_env_key_exists(char const* key);
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/** @brief Get environment variable value as int. */
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int tr_env_get_int(char const* key, int default_value);
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/** @brief Get environment variable value as string (should be freed afterwards). */
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char* tr_env_get_string(char const* key, char const* default_value);
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/***
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****
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***/
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void tr_net_init(void);
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/** @} */
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TR_END_DECLS
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