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transmission/libtransmission/utils.cc

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/*
* This file Copyright (C) 2009-2017 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#ifdef HAVE_MEMMEM
#ifndef _GNU_SOURCE
#define _GNU_SOURCE /* glibc's string.h needs this to pick up memmem */
#endif
#endif
#include <algorithm> // std::sort
#include <array> // std::array
#include <cctype> /* isdigit(), tolower() */
#include <cerrno>
#include <cfloat> /* DBL_DIG */
#include <clocale> /* localeconv() */
#include <cmath> /* fabs(), floor() */
#include <cstdint> /* SIZE_MAX */
#include <cstdio>
#include <cstdlib> /* getenv() */
#include <cstring> /* strerror(), memset(), memmem() */
#include <ctime> /* nanosleep() */
#include <exception>
#include <iterator> // std::back_inserter
#include <set>
#include <string>
#include <vector>
#if defined(__GNUC__) && !__has_include(<charconv>)
#undef HAVE_CHARCONV
#else
#define HAVE_CHARCONV 1
#include <charconv> // std::from_chars()
#endif
#ifdef _WIN32
#include <ws2tcpip.h> /* WSAStartup() */
#include <windows.h> /* Sleep(), GetSystemTimeAsFileTime(), GetEnvironmentVariable() */
#include <shellapi.h> /* CommandLineToArgv() */
#include <shlwapi.h> /* StrStrIA() */
#else
#include <ctime>
#include <unistd.h> /* getpagesize() */
#endif
#ifdef HAVE_ICONV
#include <iconv.h>
#endif
#include <event2/buffer.h>
#include <event2/event.h>
#include "transmission.h"
#include "error.h"
#include "error-types.h"
#include "file.h"
#include "ConvertUTF.h"
#include "log.h"
#include "mime-types.h"
#include "net.h"
#include "platform.h" /* tr_lockLock() */
#include "platform-quota.h" /* tr_device_info_create(), tr_device_info_get_free_space(), tr_device_info_free() */
#include "tr-assert.h"
#include "utils.h"
#include "variant.h"
#include "version.h"
time_t __tr_current_time = 0;
/***
****
***/
struct tm* tr_gmtime_r(time_t const* timep, struct tm* result)
{
#if defined(HAVE_GMTIME_R)
return gmtime_r(timep, result);
#elif defined(HAVE_GMTIME_S)
return gmtime_s(result, timep) == 0 ? result : nullptr;
#else
struct tm* p = gmtime(timep);
if (p != nullptr)
{
*result = *p;
return result;
}
return nullptr;
#endif
}
struct tm* tr_localtime_r(time_t const* timep, struct tm* result)
{
#if defined(HAVE_LOCALTIME_R)
return localtime_r(timep, result);
#elif defined(HAVE_LOCALTIME_S)
return localtime_s(result, timep) == 0 ? result : nullptr;
#else
struct tm* p = localtime(timep);
if (p != nullptr)
{
*result = *p;
return result;
}
return nullptr;
#endif
}
int tr_gettimeofday(struct timeval* tv)
{
#ifdef _WIN32
#define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL
FILETIME ft;
uint64_t tmp = 0;
if (tv == nullptr)
{
errno = EINVAL;
return -1;
}
GetSystemTimeAsFileTime(&ft);
tmp |= ft.dwHighDateTime;
tmp <<= 32;
tmp |= ft.dwLowDateTime;
tmp /= 10; /* to microseconds */
tmp -= DELTA_EPOCH_IN_MICROSECS;
tv->tv_sec = tmp / 1000000UL;
tv->tv_usec = tmp % 1000000UL;
return 0;
#undef DELTA_EPOCH_IN_MICROSECS
#else
return gettimeofday(tv, nullptr);
#endif
}
/***
****
***/
void* tr_malloc(size_t size)
{
return size != 0 ? malloc(size) : nullptr;
}
void* tr_malloc0(size_t size)
{
return size != 0 ? calloc(1, size) : nullptr;
}
void* tr_realloc(void* p, size_t size)
{
void* result = size != 0 ? realloc(p, size) : nullptr;
if (result == nullptr)
{
tr_free(p);
}
return result;
}
void tr_free(void* p)
{
if (p != nullptr)
{
free(p);
}
}
void tr_free_ptrv(void* const* p)
{
if (p == nullptr)
{
return;
}
while (*p != nullptr)
{
tr_free(*p);
++p;
}
}
void* tr_memdup(void const* src, size_t byteCount)
{
return memcpy(tr_malloc(byteCount), src, byteCount);
}
/***
****
***/
char const* tr_strip_positional_args(char const* str)
{
static auto buf = std::array<char, 512>{};
char const* in = str;
size_t pos = 0;
for (; str && *str && pos + 1 < buf.size(); ++str)
{
buf[pos++] = *str;
if (*str == '%' && isdigit(str[1]))
{
char const* tmp = str + 1;
while (isdigit(*tmp))
{
++tmp;
}
if (*tmp == '$')
{
str = tmp[1] == '\'' ? tmp + 1 : tmp;
}
}
if (*str == '%' && str[1] == '\'')
{
str = str + 1;
}
}
buf[pos] = '\0';
return in && !strcmp(buf.data(), in) ? in : buf.data();
}
/**
***
**/
void tr_timerAdd(struct event* timer, int seconds, int microseconds)
{
struct timeval tv;
tv.tv_sec = seconds;
tv.tv_usec = microseconds;
TR_ASSERT(tv.tv_sec >= 0);
TR_ASSERT(tv.tv_usec >= 0);
TR_ASSERT(tv.tv_usec < 1000000);
evtimer_add(timer, &tv);
}
void tr_timerAddMsec(struct event* timer, int msec)
{
int const seconds = msec / 1000;
int const usec = (msec % 1000) * 1000;
tr_timerAdd(timer, seconds, usec);
}
/**
***
**/
uint8_t* tr_loadFile(char const* path, size_t* size, tr_error** error)
{
tr_sys_path_info info;
tr_sys_file_t fd;
tr_error* my_error = nullptr;
char const* const err_fmt = _("Couldn't read \"%1$s\": %2$s");
/* try to stat the file */
if (!tr_sys_path_get_info(path, 0, &info, &my_error))
{
tr_logAddDebug(err_fmt, path, my_error->message);
tr_error_propagate(error, &my_error);
return nullptr;
}
if (info.type != TR_SYS_PATH_IS_FILE)
{
tr_logAddError(err_fmt, path, _("Not a regular file"));
tr_error_set_literal(error, TR_ERROR_EISDIR, _("Not a regular file"));
return nullptr;
}
/* file size should be able to fit into size_t */
if (sizeof(info.size) > sizeof(*size))
{
TR_ASSERT(info.size <= SIZE_MAX);
}
/* Load the torrent file into our buffer */
fd = tr_sys_file_open(path, TR_SYS_FILE_READ | TR_SYS_FILE_SEQUENTIAL, 0, &my_error);
if (fd == TR_BAD_SYS_FILE)
{
tr_logAddError(err_fmt, path, my_error->message);
tr_error_propagate(error, &my_error);
return nullptr;
}
auto* buf = static_cast<uint8_t*>(tr_malloc(info.size + 1));
if (!tr_sys_file_read(fd, buf, info.size, nullptr, &my_error))
{
tr_logAddError(err_fmt, path, my_error->message);
tr_sys_file_close(fd, nullptr);
free(buf);
tr_error_propagate(error, &my_error);
return nullptr;
}
tr_sys_file_close(fd, nullptr);
buf[info.size] = '\0';
*size = info.size;
return buf;
}
char* tr_buildPath(char const* first_element, ...)
{
char const* element;
char* buf;
char* pch;
va_list vl;
size_t bufLen = 0;
/* pass 1: allocate enough space for the string */
va_start(vl, first_element);
element = first_element;
while (element != nullptr)
{
bufLen += strlen(element) + 1;
element = va_arg(vl, char const*);
}
pch = buf = tr_new(char, bufLen);
va_end(vl);
if (buf == nullptr)
{
return nullptr;
}
/* pass 2: build the string piece by piece */
va_start(vl, first_element);
element = first_element;
while (element != nullptr)
{
size_t const elementLen = strlen(element);
memcpy(pch, element, elementLen);
pch += elementLen;
*pch++ = TR_PATH_DELIMITER;
element = va_arg(vl, char const*);
}
va_end(vl);
/* terminate the string. if nonempty, eat the unwanted trailing slash */
if (pch != buf)
{
--pch;
}
*pch++ = '\0';
/* sanity checks & return */
TR_ASSERT(pch - buf == (ptrdiff_t)bufLen);
return buf;
}
int64_t tr_getDirFreeSpace(char const* dir)
{
int64_t free_space;
if (tr_str_is_empty(dir))
{
errno = EINVAL;
free_space = -1;
}
else
{
struct tr_device_info* info;
info = tr_device_info_create(dir);
free_space = tr_device_info_get_free_space(info);
tr_device_info_free(info);
}
return free_space;
}
/****
*****
****/
char* evbuffer_free_to_str(struct evbuffer* buf, size_t* result_len)
{
size_t const n = evbuffer_get_length(buf);
char* ret = tr_new(char, n + 1);
evbuffer_copyout(buf, ret, n);
evbuffer_free(buf);
ret[n] = '\0';
if (result_len != nullptr)
{
*result_len = n;
}
return ret;
}
char* tr_strdup(void const* in)
{
return tr_strndup(in, in != nullptr ? strlen(static_cast<char const*>(in)) : 0);
}
char* tr_strndup(void const* in, size_t len)
{
char* out = nullptr;
if (len == TR_BAD_SIZE)
{
out = tr_strdup(in);
}
else if (in != nullptr)
{
out = static_cast<char*>(tr_malloc(len + 1));
if (out != nullptr)
{
memcpy(out, in, len);
out[len] = '\0';
}
}
return out;
}
char const* tr_memmem(char const* haystack, size_t haystacklen, char const* needle, size_t needlelen)
{
#ifdef HAVE_MEMMEM
return static_cast<char const*>(memmem(haystack, haystacklen, needle, needlelen));
#else
if (needlelen == 0)
{
return haystack;
}
if (needlelen > haystacklen || haystack == nullptr || needle == nullptr)
{
return nullptr;
}
for (size_t i = 0; i <= haystacklen - needlelen; ++i)
{
if (memcmp(haystack + i, needle, needlelen) == 0)
{
return haystack + i;
}
}
return nullptr;
#endif
}
extern "C"
{
int DoMatch(char const* text, char const* p);
}
/* User-level routine. returns whether or not 'text' and 'p' matched */
bool tr_wildmat(char const* text, char const* p)
{
return (p[0] == '*' && p[1] == '\0') || (DoMatch(text, p) == true);
}
char const* tr_strcasestr(char const* haystack, char const* needle)
{
#ifdef HAVE_STRCASESTR
return strcasestr(haystack, needle);
#elif defined(_WIN32)
return StrStrIA(haystack, needle);
#else
#error please open a PR to implement tr_strcasestr() for your platform
#endif
}
char* tr_strdup_printf(char const* fmt, ...)
{
va_list ap;
char* ret;
va_start(ap, fmt);
ret = tr_strdup_vprintf(fmt, ap);
va_end(ap);
return ret;
}
char* tr_strdup_vprintf(char const* fmt, va_list args)
{
struct evbuffer* buf = evbuffer_new();
evbuffer_add_vprintf(buf, fmt, args);
return evbuffer_free_to_str(buf, nullptr);
}
char const* tr_strerror(int i)
{
char const* ret = strerror(i);
if (ret == nullptr)
{
ret = "Unknown Error";
}
return ret;
}
int tr_strcmp0(char const* str1, char const* str2)
{
if (str1 != nullptr && str2 != nullptr)
{
return strcmp(str1, str2);
}
if (str1 != nullptr)
{
return 1;
}
if (str2 != nullptr)
{
return -1;
}
return 0;
}
/****
*****
****/
/* https://bugs.launchpad.net/percona-patches/+bug/526863/+attachment/1160199/+files/solaris_10_fix.patch */
char* tr_strsep(char** str, char const* delims)
{
#ifdef HAVE_STRSEP
return strsep(str, delims);
#else
char* token;
if (*str == nullptr) /* no more tokens */
{
return nullptr;
}
token = *str;
while (**str != '\0')
{
if (strchr(delims, **str) != nullptr)
{
**str = '\0';
(*str)++;
return token;
}
(*str)++;
}
/* there is not another token */
*str = nullptr;
return token;
#endif
}
char* tr_strstrip(char* str)
{
if (str != nullptr)
{
size_t len = strlen(str);
while (len != 0 && isspace(str[len - 1]))
{
--len;
}
size_t pos = 0;
while (pos < len && isspace(str[pos]))
{
++pos;
}
len -= pos;
memmove(str, str + pos, len);
str[len] = '\0';
}
return str;
}
bool tr_str_has_suffix(char const* str, char const* suffix)
{
size_t str_len;
size_t suffix_len;
if (str == nullptr)
{
return false;
}
if (suffix == nullptr)
{
return true;
}
str_len = strlen(str);
suffix_len = strlen(suffix);
if (str_len < suffix_len)
{
return false;
}
return evutil_ascii_strncasecmp(str + str_len - suffix_len, suffix, suffix_len) == 0;
}
/****
*****
****/
uint64_t tr_time_msec(void)
{
struct timeval tv;
tr_gettimeofday(&tv);
return (uint64_t)tv.tv_sec * 1000 + (tv.tv_usec / 1000);
}
void tr_wait_msec(long int msec)
{
#ifdef _WIN32
Sleep((DWORD)msec);
#else
struct timespec ts;
ts.tv_sec = msec / 1000;
ts.tv_nsec = (msec % 1000) * 1000000;
nanosleep(&ts, nullptr);
#endif
}
/***
****
***/
int tr_snprintf(void* buf, size_t buflen, char const* fmt, ...)
{
va_list args;
va_start(args, fmt);
int len = evutil_vsnprintf(static_cast<char*>(buf), buflen, fmt, args);
va_end(args);
return len;
}
/*
* Copy src to string dst of size siz. At most siz-1 characters
* will be copied. Always NUL terminates (unless siz == 0).
* Returns strlen (src); if retval >= siz, truncation occurred.
*/
size_t tr_strlcpy(void* vdst, void const* vsrc, size_t siz)
{
auto* dst = static_cast<char*>(vdst);
auto const* const src = static_cast<char const*>(vsrc);
TR_ASSERT(dst != nullptr);
TR_ASSERT(src != nullptr);
#ifdef HAVE_STRLCPY
return strlcpy(dst, src, siz);
#else
auto* d = dst;
auto* s = src;
size_t n = siz;
/* Copy as many bytes as will fit */
if (n != 0)
{
while (--n != 0)
{
if ((*d++ = *s++) == '\0')
{
break;
}
}
}
/* Not enough room in dst, add NUL and traverse rest of src */
if (n == 0)
{
if (siz != 0)
{
*d = '\0'; /* NUL-terminate dst */
}
while (*s++ != '\0')
{
}
}
return s - (char const*)src - 1; /* count does not include NUL */
#endif
}
/***
****
***/
double tr_getRatio(uint64_t numerator, uint64_t denominator)
{
double ratio;
if (denominator > 0)
{
ratio = numerator / (double)denominator;
}
else if (numerator > 0)
{
ratio = TR_RATIO_INF;
}
else
{
ratio = TR_RATIO_NA;
}
return ratio;
}
void tr_binary_to_hex(void const* vinput, void* voutput, size_t byte_length)
{
static char const hex[] = "0123456789abcdef";
auto const* input = static_cast<uint8_t const*>(vinput);
auto* output = static_cast<char*>(voutput);
/* go from back to front to allow for in-place conversion */
input += byte_length;
output += byte_length * 2;
*output = '\0';
while (byte_length-- > 0)
{
unsigned int const val = *(--input);
*(--output) = hex[val & 0xf];
*(--output) = hex[val >> 4];
}
}
void tr_hex_to_binary(void const* vinput, void* voutput, size_t byte_length)
{
static char const hex[] = "0123456789abcdef";
auto const* input = static_cast<uint8_t const*>(vinput);
auto* output = static_cast<uint8_t*>(voutput);
for (size_t i = 0; i < byte_length; ++i)
{
int const hi = strchr(hex, tolower(*input++)) - hex;
int const lo = strchr(hex, tolower(*input++)) - hex;
*output++ = (uint8_t)((hi << 4) | lo);
}
}
/***
****
***/
static bool isValidURLChars(char const* url, size_t url_len)
{
static char const rfc2396_valid_chars
[] = "abcdefghijklmnopqrstuvwxyz" /* lowalpha */
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" /* upalpha */
"0123456789" /* digit */
"-_.!~*'()" /* mark */
";/?:@&=+$," /* reserved */
"<>#%<\"" /* delims */
"{}|\\^[]`"; /* unwise */
if (url == nullptr)
{
return false;
}
for (char const *c = url, *end = url + url_len; c < end && *c != '\0'; ++c)
{
if (memchr(rfc2396_valid_chars, *c, sizeof(rfc2396_valid_chars) - 1) == nullptr)
{
return false;
}
}
return true;
}
bool tr_urlIsValidTracker(char const* url)
{
if (url == nullptr)
{
return false;
}
size_t const url_len = strlen(url);
return isValidURLChars(url, url_len) && tr_urlParse(url, url_len, nullptr, nullptr, nullptr, nullptr) &&
(memcmp(url, "http://", 7) == 0 || memcmp(url, "https://", 8) == 0 || memcmp(url, "udp://", 6) == 0);
}
bool tr_urlIsValid(char const* url, size_t url_len)
{
if (url == nullptr)
{
return false;
}
if (url_len == TR_BAD_SIZE)
{
url_len = strlen(url);
}
return isValidURLChars(url, url_len) && tr_urlParse(url, url_len, nullptr, nullptr, nullptr, nullptr) &&
(memcmp(url, "http://", 7) == 0 || memcmp(url, "https://", 8) == 0 || memcmp(url, "ftp://", 6) == 0 ||
memcmp(url, "sftp://", 7) == 0);
}
bool tr_addressIsIP(char const* str)
{
tr_address tmp;
return tr_address_from_string(&tmp, str);
}
static int parse_port(char const* port, size_t port_len)
{
char* tmp = tr_strndup(port, port_len);
char* end;
long port_num = strtol(tmp, &end, 10);
if (*end != '\0' || port_num <= 0 || port_num >= 65536)
{
port_num = -1;
}
tr_free(tmp);
return (int)port_num;
}
static int get_port_for_scheme(char const* scheme, size_t scheme_len)
{
struct known_scheme
{
char const* name;
int port;
};
static struct known_scheme const known_schemes[] = {
{ "udp", 80 }, //
{ "ftp", 21 }, //
{ "sftp", 22 }, //
{ "http", 80 }, //
{ "https", 443 }, //
{ nullptr, 0 }, //
};
for (struct known_scheme const* s = known_schemes; s->name != nullptr; ++s)
{
if (scheme_len == strlen(s->name) && memcmp(scheme, s->name, scheme_len) == 0)
{
return s->port;
}
}
return -1;
}
bool tr_urlParse(char const* url, size_t url_len, char** setme_scheme, char** setme_host, int* setme_port, char** setme_path)
{
if (url_len == TR_BAD_SIZE)
{
url_len = strlen(url);
}
char const* scheme = url;
char const* scheme_end = tr_memmem(scheme, url_len, "://", 3);
if (scheme_end == nullptr)
{
return false;
}
size_t const scheme_len = scheme_end - scheme;
if (scheme_len == 0)
{
return false;
}
url += scheme_len + 3;
url_len -= scheme_len + 3;
char const* authority = url;
auto const* authority_end = static_cast<char const*>(memchr(authority, '/', url_len));
if (authority_end == nullptr)
{
authority_end = authority + url_len;
}
size_t const authority_len = authority_end - authority;
if (authority_len == 0)
{
return false;
}
url += authority_len;
url_len -= authority_len;
auto const* host_end = static_cast<char const*>(memchr(authority, ':', authority_len));
size_t const host_len = host_end != nullptr ? (size_t)(host_end - authority) : authority_len;
if (host_len == 0)
{
return false;
}
size_t const port_len = host_end != nullptr ? authority_end - host_end - 1 : 0;
if (setme_scheme != nullptr)
{
*setme_scheme = tr_strndup(scheme, scheme_len);
}
if (setme_host != nullptr)
{
*setme_host = tr_strndup(authority, host_len);
}
if (setme_port != nullptr)
{
*setme_port = port_len > 0 ? parse_port(host_end + 1, port_len) : get_port_for_scheme(scheme, scheme_len);
}
if (setme_path != nullptr)
{
if (url[0] == '\0')
{
*setme_path = tr_strdup("/");
}
else
{
*setme_path = tr_strndup(url, url_len);
}
}
return true;
}
/***
****
***/
void tr_removeElementFromArray(void* array, size_t index_to_remove, size_t sizeof_element, size_t nmemb)
{
auto* a = static_cast<char*>(array);
memmove(
a + sizeof_element * index_to_remove,
a + sizeof_element * (index_to_remove + 1),
sizeof_element * (--nmemb - index_to_remove));
}
int tr_lowerBound(
void const* key,
void const* base,
size_t nmemb,
size_t size,
tr_voidptr_compare_func compar,
bool* exact_match)
{
size_t first = 0;
auto const* cbase = static_cast<char const*>(base);
bool exact = false;
while (nmemb != 0)
{
size_t const half = nmemb / 2;
size_t const middle = first + half;
int const c = (*compar)(key, cbase + size * middle);
if (c <= 0)
{
if (c == 0)
{
exact = true;
}
nmemb = half;
}
else
{
first = middle + 1;
nmemb = nmemb - half - 1;
}
}
*exact_match = exact;
return first;
}
/***
****
***/
static char* strip_non_utf8(char const* in, size_t inlen)
{
char const* end;
struct evbuffer* buf = evbuffer_new();
while (!tr_utf8_validate(in, inlen, &end))
{
int const good_len = end - in;
evbuffer_add(buf, in, good_len);
inlen -= (good_len + 1);
in += (good_len + 1);
evbuffer_add(buf, "?", 1);
}
evbuffer_add(buf, in, inlen);
return evbuffer_free_to_str(buf, nullptr);
}
static char* to_utf8(char const* in, size_t inlen)
{
char* ret = nullptr;
#ifdef HAVE_ICONV
char const* encodings[] = { "CURRENT", "ISO-8859-15" };
size_t const buflen = inlen * 4 + 10;
char* out = tr_new(char, buflen);
for (size_t i = 0; ret == nullptr && i < TR_N_ELEMENTS(encodings); ++i)
{
#ifdef ICONV_SECOND_ARGUMENT_IS_CONST
auto const* inbuf = in;
#else
auto* inbuf = const_cast<char*>(in);
#endif
char* outbuf = out;
size_t inbytesleft = inlen;
size_t outbytesleft = buflen;
char const* test_encoding = encodings[i];
iconv_t cd = iconv_open("UTF-8", test_encoding);
if (cd != (iconv_t)-1)
{
if (iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft) != (size_t)-1)
{
ret = tr_strndup(out, buflen - outbytesleft);
}
iconv_close(cd);
}
}
tr_free(out);
#endif
if (ret == nullptr)
{
ret = strip_non_utf8(in, inlen);
}
return ret;
}
char* tr_utf8clean(char const* str, size_t max_len)
{
char* ret;
char const* end;
if (max_len == TR_BAD_SIZE)
{
max_len = strlen(str);
}
if (tr_utf8_validate(str, max_len, &end))
{
ret = tr_strndup(str, max_len);
}
else
{
ret = to_utf8(str, max_len);
}
TR_ASSERT(tr_utf8_validate(ret, TR_BAD_SIZE, nullptr));
return ret;
}
#ifdef _WIN32
char* tr_win32_native_to_utf8(wchar_t const* text, int text_size)
{
return tr_win32_native_to_utf8_ex(text, text_size, 0, 0, nullptr);
}
char* tr_win32_native_to_utf8_ex(
wchar_t const* text,
int text_size,
int extra_chars_before,
int extra_chars_after,
int* real_result_size)
{
char* ret = nullptr;
int size;
if (text_size == -1)
{
text_size = wcslen(text);
}
size = WideCharToMultiByte(CP_UTF8, 0, text, text_size, nullptr, 0, nullptr, nullptr);
if (size == 0)
{
goto fail;
}
ret = tr_new(char, size + extra_chars_before + extra_chars_after + 1);
size = WideCharToMultiByte(CP_UTF8, 0, text, text_size, ret + extra_chars_before, size, nullptr, nullptr);
if (size == 0)
{
goto fail;
}
ret[size + extra_chars_before + extra_chars_after] = '\0';
if (real_result_size != nullptr)
{
*real_result_size = size;
}
return ret;
fail:
tr_free(ret);
return nullptr;
}
wchar_t* tr_win32_utf8_to_native(char const* text, int text_size)
{
return tr_win32_utf8_to_native_ex(text, text_size, 0, 0, nullptr);
}
wchar_t* tr_win32_utf8_to_native_ex(
char const* text,
int text_size,
int extra_chars_before,
int extra_chars_after,
int* real_result_size)
{
wchar_t* ret = nullptr;
int size;
if (text_size == -1)
{
text_size = strlen(text);
}
size = MultiByteToWideChar(CP_UTF8, 0, text, text_size, nullptr, 0);
if (size == 0)
{
goto fail;
}
ret = tr_new(wchar_t, size + extra_chars_before + extra_chars_after + 1);
size = MultiByteToWideChar(CP_UTF8, 0, text, text_size, ret + extra_chars_before, size);
if (size == 0)
{
goto fail;
}
ret[size + extra_chars_before + extra_chars_after] = L'\0';
if (real_result_size != nullptr)
{
*real_result_size = size;
}
return ret;
fail:
tr_free(ret);
return nullptr;
}
char* tr_win32_format_message(uint32_t code)
{
wchar_t* wide_text = nullptr;
DWORD wide_size;
char* text = nullptr;
size_t text_size;
wide_size = FormatMessageW(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
nullptr,
code,
0,
(LPWSTR)&wide_text,
0,
nullptr);
if (wide_size == 0)
{
return tr_strdup_printf("Unknown error (0x%08x)", code);
}
if (wide_size != 0 && wide_text != nullptr)
{
text = tr_win32_native_to_utf8(wide_text, wide_size);
}
LocalFree(wide_text);
if (text != nullptr)
{
/* Most (all?) messages contain "\r\n" in the end, chop it */
text_size = strlen(text);
while (text_size > 0 && isspace((uint8_t)text[text_size - 1]))
{
text[--text_size] = '\0';
}
}
return text;
}
void tr_win32_make_args_utf8(int* argc, char*** argv)
{
int my_argc;
wchar_t** my_wide_argv;
my_wide_argv = CommandLineToArgvW(GetCommandLineW(), &my_argc);
if (my_wide_argv == nullptr)
{
return;
}
TR_ASSERT(*argc == my_argc);
char** my_argv = tr_new(char*, my_argc + 1);
int processed_argc = 0;
for (int i = 0; i < my_argc; ++i, ++processed_argc)
{
my_argv[i] = tr_win32_native_to_utf8(my_wide_argv[i], -1);
if (my_argv[i] == nullptr)
{
break;
}
}
if (processed_argc < my_argc)
{
for (int i = 0; i < processed_argc; ++i)
{
tr_free(my_argv[i]);
}
tr_free(my_argv);
}
else
{
my_argv[my_argc] = nullptr;
*argc = my_argc;
*argv = my_argv;
/* TODO: Add atexit handler to cleanup? */
}
LocalFree(my_wide_argv);
}
int tr_main_win32(int argc, char** argv, int (*real_main)(int, char**))
{
tr_win32_make_args_utf8(&argc, &argv);
SetConsoleCP(CP_UTF8);
SetConsoleOutputCP(CP_UTF8);
return (*real_main)(argc, argv);
}
#endif
/***
****
***/
struct number_range
{
int low;
int high;
};
/**
* This should be a single number (ex. "6") or a range (ex. "6-9").
* Anything else is an error and will return failure.
*/
static bool parseNumberSection(char const* str, char const* const end, number_range& range)
{
bool success;
auto const error = errno;
#if defined(HAVE_CHARCONV)
auto result = std::from_chars(str, end, range.low);
success = result.ec == std::errc{};
if (success)
{
range.high = range.low;
if (result.ptr != end && *result.ptr == '-')
{
result = std::from_chars(result.ptr + 1, end, range.high);
success = result.ec == std::errc{};
}
}
#else
try
{
auto tmp = std::string(str, end);
auto pos = size_t{};
range.low = range.high = std::stoi(tmp, &pos);
if (pos != std::size(tmp) && tmp[pos] == '-')
{
tmp.erase(0, pos + 1);
range.high = std::stoi(tmp, &pos);
}
success = true;
}
catch (std::exception&)
{
success = false;
}
#endif
errno = error;
return success;
}
/**
* Given a string like "1-4" or "1-4,6,9,14-51", this allocates and returns an
* array of setmeCount ints of all the values in the array.
* For example, "5-8" will return [ 5, 6, 7, 8 ] and setmeCount will be 4.
* It's the caller's responsibility to call tr_free () on the returned array.
* If a fragment of the string can't be parsed, nullptr is returned.
*/
std::vector<int> tr_parseNumberRange(char const* str, size_t len) // TODO: string_view
{
auto values = std::set<int>{};
auto const* const end = str + (len != TR_BAD_SIZE ? len : strlen(str));
for (auto const* walk = str; walk < end;)
{
auto delim = std::find(walk, end, ',');
auto range = number_range{};
if (!parseNumberSection(walk, delim, range))
{
break;
}
for (auto i = range.low; i <= range.high; ++i)
{
values.insert(i);
}
walk = delim + 1;
}
return { std::begin(values), std::end(values) };
}
/***
****
***/
double tr_truncd(double x, int precision)
{
char* pt;
char buf[128];
tr_snprintf(buf, sizeof(buf), "%.*f", TR_ARG_TUPLE(DBL_DIG, x));
if ((pt = strstr(buf, localeconv()->decimal_point)) != nullptr)
{
pt[precision != 0 ? precision + 1 : 0] = '\0';
}
return atof(buf);
}
/* return a truncated double as a string */
static char* tr_strtruncd(char* buf, double x, int precision, size_t buflen)
{
tr_snprintf(buf, buflen, "%.*f", precision, tr_truncd(x, precision));
return buf;
}
char* tr_strpercent(char* buf, double x, size_t buflen)
{
if (x < 100.0)
{
tr_strtruncd(buf, x, 1, buflen);
}
else
{
tr_strtruncd(buf, x, 0, buflen);
}
return buf;
}
char* tr_strratio(char* buf, size_t buflen, double ratio, char const* infinity)
{
if ((int)ratio == TR_RATIO_NA)
{
tr_strlcpy(buf, _("None"), buflen);
}
else if ((int)ratio == TR_RATIO_INF)
{
tr_strlcpy(buf, infinity, buflen);
}
else
{
tr_strpercent(buf, ratio, buflen);
}
return buf;
}
/***
****
***/
bool tr_moveFile(char const* oldpath, char const* newpath, tr_error** error)
{
tr_sys_path_info info;
/* make sure the old file exists */
if (!tr_sys_path_get_info(oldpath, 0, &info, error))
{
tr_error_prefix(error, "Unable to get information on old file: ");
return false;
}
if (info.type != TR_SYS_PATH_IS_FILE)
{
tr_error_set_literal(error, TR_ERROR_EINVAL, "Old path does not point to a file.");
return false;
}
/* make sure the target directory exists */
{
char* newdir = tr_sys_path_dirname(newpath, error);
bool const i = newdir != nullptr && tr_sys_dir_create(newdir, TR_SYS_DIR_CREATE_PARENTS, 0777, error);
tr_free(newdir);
if (!i)
{
tr_error_prefix(error, "Unable to create directory for new file: ");
return false;
}
}
/* they might be on the same filesystem... */
if (tr_sys_path_rename(oldpath, newpath, nullptr))
{
return true;
}
/* Otherwise, copy the file. */
if (!tr_sys_path_copy(oldpath, newpath, error))
{
tr_error_prefix(error, "Unable to copy: ");
return false;
}
{
tr_error* my_error = nullptr;
if (!tr_sys_path_remove(oldpath, &my_error))
{
tr_logAddError("Unable to remove file at old path: %s", my_error->message);
tr_error_free(my_error);
}
}
return true;
}
/***
****
***/
uint64_t tr_htonll(uint64_t x)
{
#ifdef HAVE_HTONLL
return htonll(x);
#else
/* fallback code by bdonlan at http://stackoverflow.com/questions/809902/64-bit-ntohl-in-c/875505#875505 */
union
{
uint32_t lx[2];
uint64_t llx;
} u;
u.lx[0] = htonl(x >> 32);
u.lx[1] = htonl(x & 0xFFFFFFFFULL);
return u.llx;
#endif
}
uint64_t tr_ntohll(uint64_t x)
{
#ifdef HAVE_NTOHLL
return ntohll(x);
#else
/* fallback code by bdonlan at http://stackoverflow.com/questions/809902/64-bit-ntohl-in-c/875505#875505 */
union
{
uint32_t lx[2];
uint64_t llx;
} u;
u.llx = x;
return ((uint64_t)ntohl(u.lx[0]) << 32) | (uint64_t)ntohl(u.lx[1]);
#endif
}
/***
****
****
****
***/
struct formatter_unit
{
char* name;
size_t value;
};
struct formatter_units
{
struct formatter_unit units[4];
};
enum
{
TR_FMT_KB,
TR_FMT_MB,
TR_FMT_GB,
TR_FMT_TB
};
static void formatter_init(
struct formatter_units* units,
size_t kilo,
char const* kb,
char const* mb,
char const* gb,
char const* tb)
{
size_t value;
value = kilo;
units->units[TR_FMT_KB].name = tr_strdup(kb);
units->units[TR_FMT_KB].value = value;
value *= kilo;
units->units[TR_FMT_MB].name = tr_strdup(mb);
units->units[TR_FMT_MB].value = value;
value *= kilo;
units->units[TR_FMT_GB].name = tr_strdup(gb);
units->units[TR_FMT_GB].value = value;
value *= kilo;
units->units[TR_FMT_TB].name = tr_strdup(tb);
units->units[TR_FMT_TB].value = value;
}
static char* formatter_get_size_str(struct formatter_units const* u, char* buf, size_t bytes, size_t buflen)
{
int precision;
double value;
char const* units;
struct formatter_unit const* unit;
if (bytes < u->units[1].value)
{
unit = &u->units[0];
}
else if (bytes < u->units[2].value)
{
unit = &u->units[1];
}
else if (bytes < u->units[3].value)
{
unit = &u->units[2];
}
else
{
unit = &u->units[3];
}
value = (double)bytes / unit->value;
units = unit->name;
if (unit->value == 1)
{
precision = 0;
}
else if (value < 100)
{
precision = 2;
}
else
{
precision = 1;
}
tr_snprintf(buf, buflen, "%.*f %s", TR_ARG_TUPLE(precision, value), units);
return buf;
}
static struct formatter_units size_units;
void tr_formatter_size_init(size_t kilo, char const* kb, char const* mb, char const* gb, char const* tb)
{
formatter_init(&size_units, kilo, kb, mb, gb, tb);
}
char* tr_formatter_size_B(char* buf, size_t bytes, size_t buflen)
{
return formatter_get_size_str(&size_units, buf, bytes, buflen);
}
static struct formatter_units speed_units;
size_t tr_speed_K = 0;
void tr_formatter_speed_init(size_t kilo, char const* kb, char const* mb, char const* gb, char const* tb)
{
tr_speed_K = kilo;
formatter_init(&speed_units, kilo, kb, mb, gb, tb);
}
char* tr_formatter_speed_KBps(char* buf, double KBps, size_t buflen)
{
double const K = speed_units.units[TR_FMT_KB].value;
double speed = KBps;
if (speed <= 999.95) /* 0.0 KB to 999.9 KB */
{
tr_snprintf(buf, buflen, "%d %s", (int)speed, speed_units.units[TR_FMT_KB].name);
}
else
{
speed /= K;
if (speed <= 99.995) /* 0.98 MB to 99.99 MB */
{
tr_snprintf(buf, buflen, "%.2f %s", speed, speed_units.units[TR_FMT_MB].name);
}
else if (speed <= 999.95) /* 100.0 MB to 999.9 MB */
{
tr_snprintf(buf, buflen, "%.1f %s", speed, speed_units.units[TR_FMT_MB].name);
}
else
{
tr_snprintf(buf, buflen, "%.1f %s", speed / K, speed_units.units[TR_FMT_GB].name);
}
}
return buf;
}
static struct formatter_units mem_units;
size_t tr_mem_K = 0;
void tr_formatter_mem_init(size_t kilo, char const* kb, char const* mb, char const* gb, char const* tb)
{
tr_mem_K = kilo;
formatter_init(&mem_units, kilo, kb, mb, gb, tb);
}
char* tr_formatter_mem_B(char* buf, size_t bytes_per_second, size_t buflen)
{
return formatter_get_size_str(&mem_units, buf, bytes_per_second, buflen);
}
void tr_formatter_get_units(void* vdict)
{
tr_variant* l;
auto* dict = static_cast<tr_variant*>(vdict);
tr_variantDictReserve(dict, 6);
tr_variantDictAddInt(dict, TR_KEY_memory_bytes, mem_units.units[TR_FMT_KB].value);
l = tr_variantDictAddList(dict, TR_KEY_memory_units, 4);
for (int i = 0; i < 4; i++)
{
tr_variantListAddStr(l, mem_units.units[i].name);
}
tr_variantDictAddInt(dict, TR_KEY_size_bytes, size_units.units[TR_FMT_KB].value);
l = tr_variantDictAddList(dict, TR_KEY_size_units, 4);
for (int i = 0; i < 4; i++)
{
tr_variantListAddStr(l, size_units.units[i].name);
}
tr_variantDictAddInt(dict, TR_KEY_speed_bytes, speed_units.units[TR_FMT_KB].value);
l = tr_variantDictAddList(dict, TR_KEY_speed_units, 4);
for (int i = 0; i < 4; i++)
{
tr_variantListAddStr(l, speed_units.units[i].name);
}
}
/***
**** ENVIRONMENT
***/
bool tr_env_key_exists(char const* key)
{
TR_ASSERT(key != nullptr);
#ifdef _WIN32
return GetEnvironmentVariableA(key, nullptr, 0) != 0;
#else
return getenv(key) != nullptr;
#endif
}
int tr_env_get_int(char const* key, int default_value)
{
TR_ASSERT(key != nullptr);
#ifdef _WIN32
char value[16];
if (GetEnvironmentVariableA(key, value, TR_N_ELEMENTS(value)) > 1)
{
return atoi(value);
}
#else
char const* value = getenv(key);
if (!tr_str_is_empty(value))
{
return atoi(value);
}
#endif
return default_value;
}
char* tr_env_get_string(char const* key, char const* default_value)
{
TR_ASSERT(key != nullptr);
#ifdef _WIN32
wchar_t* wide_key = tr_win32_utf8_to_native(key, -1);
char* value = nullptr;
if (wide_key != nullptr)
{
DWORD const size = GetEnvironmentVariableW(wide_key, nullptr, 0);
if (size != 0)
{
wchar_t* const wide_value = tr_new(wchar_t, size);
if (GetEnvironmentVariableW(wide_key, wide_value, size) == size - 1)
{
value = tr_win32_native_to_utf8(wide_value, size);
}
tr_free(wide_value);
}
tr_free(wide_key);
}
if (value == nullptr && default_value != nullptr)
{
value = tr_strdup(default_value);
}
return value;
#else
char const* value = getenv(key);
if (value == nullptr)
{
value = default_value;
}
return value != nullptr ? tr_strdup(value) : nullptr;
#endif
}
/***
****
***/
void tr_net_init(void)
{
static bool initialized = false;
if (!initialized)
{
#ifdef _WIN32
WSADATA wsaData;
WSAStartup(MAKEWORD(2, 2), &wsaData);
#endif
initialized = true;
}
}
/// mime-type
char const* tr_get_mime_type_for_filename(std::string_view filename)
{
auto constexpr compare = [](mime_type_suffix const& entry, auto const& suffix)
{
return entry.suffix < suffix;
};
auto const pos = filename.rfind('.');
if (pos != filename.npos)
{
// make a lowercase copy of the file suffix
filename.remove_prefix(pos + 1);
auto suffix_lc = std::string{};
std::transform(
std::begin(filename),
std::end(filename),
std::back_inserter(suffix_lc),
[](auto c) { return std::tolower(c); });
// find it
auto const it = std::lower_bound(std::begin(mime_type_suffixes), std::end(mime_type_suffixes), suffix_lc, compare);
if (it != std::end(mime_type_suffixes) && suffix_lc == it->suffix)
{
return std::data(it->mime_type);
}
}
return nullptr;
}
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