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utils.cpp
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#define WIN32_NO_STATUS
#include <windows.h>
#undef WIN32_NO_STATUS
#include <ntstatus.h>
#include <errno.h>
#include <sys/stat.h>
#include "utils.h"
typedef unsigned int ICONV_CHAR;
#if defined(__GNUC__) && __GNUC__ >= 3
#define unlikely(x) __builtin_expect(!!(x), 0)
#else
#define unlikely(x) (x)
#endif
#define GET_A2(p) (*((unsigned short *)(p)))
#define PUT_A2(buf, c) \
do { \
*((unsigned short *)(buf)) = (c); \
} while (0)
static const unsigned char utf8_lengths[256] = {
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 0, 0,
};
static const unsigned char utf8_masks[7] = {0, 0x7f, 0x1f, 0x0f,
0x07, 0x03, 0x01};
static size_t get_utf8(const unsigned char *p, size_t len, ICONV_CHAR *out) {
ICONV_CHAR uc;
size_t l;
l = utf8_lengths[p[0]];
if (unlikely(l == 0))
return -EILSEQ;
if (unlikely(len < l))
return -EINVAL;
len = l;
uc = *p++ & utf8_masks[l];
while (--l)
uc = (uc << 6) | (*p++ & 0x3f);
*out = uc;
return len;
}
static size_t put_utf8(unsigned char *buf, ICONV_CHAR c) {
#define MASK(n) ((0xffffffffu << (n)) & 0xffffffffu)
size_t o_len;
unsigned mask;
if ((c & MASK(7)) == 0) {
*buf = (unsigned char)c;
return 1;
}
o_len = 2;
for (;;) {
if ((c & MASK(11)) == 0)
break;
++o_len;
if ((c & MASK(16)) == 0)
break;
++o_len;
if ((c & MASK(21)) == 0)
break;
++o_len;
if ((c & MASK(26)) == 0)
break;
++o_len;
if ((c & MASK(31)) != 0)
return -EINVAL;
}
buf += o_len;
mask = 0xff80;
for (;;) {
*--buf = 0x80 | (c & 0x3f);
c >>= 6;
mask >>= 1;
if (c < 0x40) {
*--buf = mask | c;
break;
}
}
return o_len;
}
static size_t get_utf16(const unsigned char *p, size_t len, ICONV_CHAR *out) {
ICONV_CHAR c;
if (len < 2)
return -EINVAL;
c = GET_A2(p);
if ((c & 0xfc00) == 0xd800 && len >= 4) {
ICONV_CHAR c2 = GET_A2(p + 2);
if ((c2 & 0xfc00) == 0xdc00) {
*out = (c << 10) + c2 - ((0xd800 << 10) + 0xdc00 - 0x10000);
return 4;
}
}
*out = c;
return 2;
}
static size_t put_utf16(unsigned char *buf, ICONV_CHAR c) {
if (c >= 0x110000u)
return -EILSEQ;
if (c < 0x10000u) {
PUT_A2(buf, c);
return 2;
}
c -= 0x10000u;
PUT_A2(buf, 0xd800 + (c >> 10));
PUT_A2(buf + 2, 0xdc00 + (c & 0x3ffu));
return 4;
}
typedef size_t (*get_conver_t)(const unsigned char *p, size_t len,
ICONV_CHAR *out);
typedef size_t (*put_convert_t)(unsigned char *buf, ICONV_CHAR c);
static size_t convert_char(get_conver_t get_func, put_convert_t put_func,
const void *src, size_t src_len, void *dest) {
size_t il = src_len;
const unsigned char *ib = (const unsigned char *)src;
unsigned char *ob = (unsigned char *)dest;
size_t total = 0;
while (il) {
ICONV_CHAR out_c;
size_t readed = get_func(ib, il, &out_c);
if (unlikely(readed < 0))
return -1;
il -= readed;
ib += readed;
unsigned char dummy[8] = {0};
size_t written = put_func(ob ? ob : dummy, out_c);
if (unlikely(written < 0))
return -1;
if (ob)
ob += written;
total += written;
}
return total;
}
static char *wchar_to_utf8(const wchar_t *str) {
if (str == NULL)
return NULL;
// Determine required length
size_t ln = convert_char(get_utf16, put_utf8, str,
(wcslen(str) + 1) * sizeof(wchar_t), NULL);
if (ln <= 0)
return NULL;
char *res = (char *)malloc(sizeof(char) * ln);
if (res == NULL)
return NULL;
// Convert to Unicode
convert_char(get_utf16, put_utf8, str, (wcslen(str) + 1) * sizeof(wchar_t),
res);
return res;
}
void utf8_to_wchar_buf(const char *src, wchar_t *res, int maxlen) {
if (res == NULL || maxlen == 0)
return;
size_t ln = convert_char(get_utf8, put_utf16, src, strlen(src) + 1,
NULL); /* | raise_w32_error()*/
;
if (ln <= 0 || ln / sizeof(wchar_t) > (size_t)maxlen) {
*res = L'\0';
return;
}
convert_char(get_utf8, put_utf16, src, strlen(src) + 1,
res); /* | raise_w32_error()*/
;
}
void utf8_to_wchar_buf_old(const char *src, wchar_t *res, int maxlen) {
if (res == NULL || maxlen == 0)
return;
int ln =
MultiByteToWideChar(CP_ACP, 0, src, -1, NULL, 0) /* | raise_w32_error()*/;
if (ln >= maxlen) {
*res = L'\0';
return;
}
MultiByteToWideChar(CP_ACP, 0, src, -1, res,
(int)(strlen(src) + 1)) /* | raise_w32_error()*/;
}
std::string wchar_to_utf8_cstr(const wchar_t *str) {
char *utf = wchar_to_utf8(str);
std::string res(utf);
free(utf);
return res;
}
std::string unixify(const std::string &str) {
// Replace slashes
std::string res = str;
for (size_t f = 0; f < res.size(); ++f) {
char ch = res[f];
if (ch == '\\')
res[f] = '/';
}
// Remove the trailing slash
if (res.size() > 1 && res[res.size() - 1] == '/')
res.resize(res.size() - 1);
return res;
}
FILETIME unixTimeToFiletime(time_t t) {
// Note that LONGLONG is a 64-bit value
LONGLONG ll;
ll = Int32x32To64(t, 10000000) + 116444736000000000LL;
FILETIME res;
res.dwLowDateTime = (DWORD)ll;
res.dwHighDateTime = (DWORD)(ll >> 32);
return res;
}
bool is_filetime_set(const FILETIME *ft) {
if (ft == 0 || (ft->dwHighDateTime == 0 && ft->dwLowDateTime == 0))
return false;
return true;
}
time_t filetimeToUnixTime(const FILETIME *ft) {
if (!is_filetime_set(ft))
return 0;
ULONGLONG ll = (ULONGLONG(ft->dwHighDateTime) << 32) + ft->dwLowDateTime;
return time_t((ll - 116444736000000000LL) / 10000000LL);
}
///////////////////////////////////////////////////////////////////////////////////////
////// Error mapping and arguments conversion
///////////////////////////////////////////////////////////////////////////////////////
struct errentry {
NTSTATUS oscode; /* OS return value */
int errnocode; /* System V error code */
};
static const struct errentry errtable[] = {
{STATUS_NOT_IMPLEMENTED, EINVAL}, /* 1 */
{STATUS_OBJECT_NAME_NOT_FOUND, ENOENT}, /* 2 */
{STATUS_OBJECT_PATH_NOT_FOUND, ENOENT}, /* 3 */
{STATUS_TOO_MANY_OPENED_FILES, EMFILE}, /* 4 */
{STATUS_ACCESS_DENIED, EACCES}, /* 5 */
{STATUS_INVALID_HANDLE, EBADF}, /* 6 */
{STATUS_DISK_CORRUPT_ERROR, ENOMEM}, /* 7 */
{STATUS_NO_MEMORY, ENOMEM}, /* 8 */
{STATUS_INVALID_ADDRESS, ENOMEM}, /* 9 */
{STATUS_VARIABLE_NOT_FOUND, E2BIG}, /* 10 */
//{ ERROR_BAD_FORMAT, ENOEXEC }, /* 11 */ Need to convert it
//to NTSTATUS
//{ ERROR_INVALID_ACCESS, EINVAL }, /* 12 */
//{ ERROR_INVALID_DATA, EINVAL }, /* 13 */
//{ ERROR_INVALID_DRIVE, ENOENT }, /* 15 */
//{ ERROR_CURRENT_DIRECTORY, EACCES }, /* 16 */
{STATUS_NOT_SAME_DEVICE, EXDEV}, /* 17 */
{STATUS_NO_MORE_FILES, ENOENT}, /* 18 */
{STATUS_FILE_LOCK_CONFLICT, EACCES}, /* 33 */
{STATUS_BAD_NETWORK_PATH, ENOENT}, /* 53 */
{STATUS_NETWORK_ACCESS_DENIED, EACCES}, /* 65 */
{STATUS_BAD_NETWORK_NAME, ENOENT}, /* 67 */
{STATUS_OBJECT_NAME_COLLISION, EEXIST}, /* 183 */
{STATUS_OBJECT_NAME_COLLISION, EEXIST}, /* 80 */
{STATUS_CANNOT_MAKE, EACCES}, /* 82 */
//{ ERROR_FAIL_I24, EACCES }, /* 83 */
{STATUS_INVALID_PARAMETER, EINVAL}, /* 87 */
//{ ERROR_NO_PROC_SLOTS, EAGAIN }, /* 89 */
//{ ERROR_DRIVE_LOCKED, EACCES }, /* 108 */
{STATUS_PIPE_BROKEN, EPIPE}, /* 109 */
{STATUS_DISK_FULL, ENOSPC}, /* 112 */
//{ ERROR_INVALID_TARGET_HANDLE, EBADF }, /* 114 */
{STATUS_INVALID_HANDLE, EINVAL}, /* 124 */
{STATUS_NOT_FOUND, ECHILD}, /* 128 */
//{ ERROR_CHILD_NOT_COMPLETE, ECHILD }, /* 129 */
//{ ERROR_DIRECT_ACCESS_HANDLE, EBADF }, /* 130 */
//{ ERROR_NEGATIVE_SEEK, EINVAL }, /* 131 */
//{ ERROR_SEEK_ON_DEVICE, EACCES }, /* 132 */
{STATUS_DIRECTORY_NOT_EMPTY, ENOTEMPTY}, /* 145 */
{STATUS_NOT_LOCKED, EACCES}, /* 158 */
{STATUS_OBJECT_PATH_SYNTAX_BAD, ENOENT}, /* 161 */
//{ ERROR_MAX_THRDS_REACHED, EAGAIN }, /* 164 */
{STATUS_LOCK_NOT_GRANTED, EACCES}, /* 167 */
{STATUS_NAME_TOO_LONG, ENOENT}, /* 206 */
//{ ERROR_NESTING_NOT_ALLOWED, EAGAIN }, /* 215 */
{STATUS_QUOTA_EXCEEDED, ENOMEM} /* 1816 */
};
const int errtable_size = sizeof(errtable) / sizeof(errtable[0]);
extern "C" int ntstatus_error_to_errno(int win_res) {
if (win_res == 0)
return 0; // No error
if (win_res < 0)
win_res = -win_res;
for (int f = 0; f < errtable_size; ++f)
if (errtable[f].oscode == win_res)
return errtable[f].errnocode;
return EINVAL;
}
extern "C" int errno_to_ntstatus_error(int err) {
if (err == 0)
return 0; // No error
if (err < 0)
err = -err;
for (int f = 0; f < errtable_size; ++f)
if (errtable[f].errnocode == err)
return errtable[f].oscode;
return ERROR_INVALID_FUNCTION;
}
extern "C" char **convert_args(int argc, wchar_t *argv[]) {
char **arr = (char **)malloc(sizeof(char *) * (argc + 1));
if (arr == NULL)
return NULL;
for (int f = 0; f < argc; ++f)
arr[f] = wchar_to_utf8(argv[f]);
arr[argc] = NULL;
return arr;
}
extern "C" void free_converted_args(int argc, char **argv) {
for (int f = 0; f < argc; ++f)
free(argv[f]);
free(argv);
}
std::string extract_file_name(const std::string &str) {
std::string extracted;
for (std::string::const_reverse_iterator f = str.rbegin(), en = str.rend();
f != en; ++f)
if (*f == '/') {
extracted = str.substr(en - f - 1);
break;
}
if (extracted.empty())
return str;
if (extracted[0] == '/')
return extracted.substr(1);
return extracted;
}
std::string extract_dir_name(const std::string &str) {
for (std::string::const_reverse_iterator f = str.rbegin(), en = str.rend();
f != en; ++f)
if (*f == '/')
return str.substr(0, en - f);
return str;
}