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platform.c
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platform.c
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/*
* Copyright (c) 2023 Lain Bailey <lain@obsproject.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define _FILE_OFFSET_BITS 64
#include <time.h>
#include <errno.h>
#include <stdlib.h>
#include <inttypes.h>
#include <locale.h>
#include "c99defs.h"
#include "platform.h"
#include "bmem.h"
#include "utf8.h"
#include "dstr.h"
#include "obs.h"
FILE *os_wfopen(const wchar_t *path, const char *mode)
{
FILE *file = NULL;
if (path) {
#ifdef _MSC_VER
wchar_t *wcs_mode;
os_utf8_to_wcs_ptr(mode, 0, &wcs_mode);
file = _wfopen(path, wcs_mode);
bfree(wcs_mode);
#else
char *mbs_path;
os_wcs_to_utf8_ptr(path, 0, &mbs_path);
file = fopen(mbs_path, mode);
bfree(mbs_path);
#endif
}
return file;
}
FILE *os_fopen(const char *path, const char *mode)
{
#ifdef _WIN32
wchar_t *wpath = NULL;
FILE *file = NULL;
if (path) {
os_utf8_to_wcs_ptr(path, 0, &wpath);
file = os_wfopen(wpath, mode);
bfree(wpath);
}
return file;
#else
return path ? fopen(path, mode) : NULL;
#endif
}
int64_t os_fgetsize(FILE *file)
{
int64_t cur_offset = os_ftelli64(file);
int64_t size;
int errval = 0;
if (fseek(file, 0, SEEK_END) == -1)
return -1;
size = os_ftelli64(file);
if (size == -1)
errval = errno;
if (os_fseeki64(file, cur_offset, SEEK_SET) != 0 && errval != 0)
errno = errval;
return size;
}
#ifdef _WIN32
int os_stat(const char *file, struct stat *st)
{
if (file) {
wchar_t w_file[512];
size_t size = os_utf8_to_wcs(file, 0, w_file, sizeof(w_file));
if (size > 0) {
struct _stat st_w32;
int ret = _wstat(w_file, &st_w32);
if (ret == 0) {
st->st_dev = st_w32.st_dev;
st->st_ino = st_w32.st_ino;
st->st_mode = st_w32.st_mode;
st->st_nlink = st_w32.st_nlink;
st->st_uid = st_w32.st_uid;
st->st_gid = st_w32.st_gid;
st->st_rdev = st_w32.st_rdev;
st->st_size = st_w32.st_size;
st->st_atime = st_w32.st_atime;
st->st_mtime = st_w32.st_mtime;
st->st_ctime = st_w32.st_ctime;
}
return ret;
}
}
return -1;
}
#endif
int os_fseeki64(FILE *file, int64_t offset, int origin)
{
#ifdef _MSC_VER
return _fseeki64(file, offset, origin);
#else
return fseeko(file, offset, origin);
#endif
}
int64_t os_ftelli64(FILE *file)
{
#ifdef _MSC_VER
return _ftelli64(file);
#else
return ftello(file);
#endif
}
size_t os_fread_mbs(FILE *file, char **pstr)
{
size_t size = 0;
size_t len = 0;
fseek(file, 0, SEEK_END);
size = (size_t)os_ftelli64(file);
*pstr = NULL;
if (size > 0) {
char *mbstr = bmalloc(size + 1);
fseek(file, 0, SEEK_SET);
size = fread(mbstr, 1, size, file);
if (size == 0) {
bfree(mbstr);
return 0;
}
mbstr[size] = 0;
len = os_mbs_to_utf8_ptr(mbstr, size, pstr);
bfree(mbstr);
}
return len;
}
size_t os_fread_utf8(FILE *file, char **pstr)
{
size_t size = 0;
size_t len = 0;
*pstr = NULL;
fseek(file, 0, SEEK_END);
size = (size_t)os_ftelli64(file);
if (size > 0) {
char bom[3];
char *utf8str;
off_t offset;
bom[0] = 0;
bom[1] = 0;
bom[2] = 0;
/* remove the ghastly BOM if present */
fseek(file, 0, SEEK_SET);
size_t size_read = fread(bom, 1, 3, file);
(void)size_read;
offset = (astrcmp_n(bom, "\xEF\xBB\xBF", 3) == 0) ? 3 : 0;
size -= offset;
if (size == 0)
return 0;
utf8str = bmalloc(size + 1);
fseek(file, offset, SEEK_SET);
size = fread(utf8str, 1, size, file);
if (size == 0) {
bfree(utf8str);
return 0;
}
utf8str[size] = 0;
*pstr = utf8str;
}
return len;
}
char *os_quick_read_mbs_file(const char *path)
{
FILE *f = os_fopen(path, "rb");
char *file_string = NULL;
if (!f)
return NULL;
os_fread_mbs(f, &file_string);
fclose(f);
return file_string;
}
char *os_quick_read_utf8_file(const char *path)
{
FILE *f = os_fopen(path, "rb");
char *file_string = NULL;
if (!f)
return NULL;
os_fread_utf8(f, &file_string);
fclose(f);
return file_string;
}
bool os_quick_write_mbs_file(const char *path, const char *str, size_t len)
{
FILE *f = os_fopen(path, "wb");
char *mbs = NULL;
size_t mbs_len = 0;
if (!f)
return false;
mbs_len = os_utf8_to_mbs_ptr(str, len, &mbs);
if (mbs_len)
fwrite(mbs, 1, mbs_len, f);
bfree(mbs);
fflush(f);
fclose(f);
return true;
}
bool os_quick_write_utf8_file(const char *path, const char *str, size_t len,
bool marker)
{
FILE *f = os_fopen(path, "wb");
if (!f)
return false;
if (marker) {
if (fwrite("\xEF\xBB\xBF", 3, 1, f) != 1) {
fclose(f);
return false;
}
}
if (len) {
if (fwrite(str, len, 1, f) != 1) {
fclose(f);
return false;
}
}
fflush(f);
fclose(f);
return true;
}
bool os_quick_write_utf8_file_safe(const char *path, const char *str,
size_t len, bool marker,
const char *temp_ext, const char *backup_ext)
{
struct dstr backup_path = {0};
struct dstr temp_path = {0};
bool success = false;
if (!temp_ext || !*temp_ext) {
blog(LOG_ERROR, "os_quick_write_utf8_file_safe: invalid "
"temporary extension specified");
return false;
}
dstr_copy(&temp_path, path);
if (*temp_ext != '.')
dstr_cat(&temp_path, ".");
dstr_cat(&temp_path, temp_ext);
if (!os_quick_write_utf8_file(temp_path.array, str, len, marker)) {
blog(LOG_ERROR,
"os_quick_write_utf8_file_safe: failed to "
"write to %s",
temp_path.array);
goto cleanup;
}
if (backup_ext && *backup_ext) {
dstr_copy(&backup_path, path);
if (*backup_ext != '.')
dstr_cat(&backup_path, ".");
dstr_cat(&backup_path, backup_ext);
}
if (os_safe_replace(path, temp_path.array, backup_path.array) == 0)
success = true;
cleanup:
dstr_free(&backup_path);
dstr_free(&temp_path);
return success;
}
int64_t os_get_file_size(const char *path)
{
FILE *f = os_fopen(path, "rb");
if (!f)
return -1;
int64_t sz = os_fgetsize(f);
fclose(f);
return sz;
}
size_t os_mbs_to_wcs(const char *str, size_t len, wchar_t *dst, size_t dst_size)
{
UNUSED_PARAMETER(len);
size_t out_len;
if (!str)
return 0;
out_len = dst ? (dst_size - 1) : mbstowcs(NULL, str, 0);
if (dst) {
if (!dst_size)
return 0;
if (out_len)
out_len = mbstowcs(dst, str, out_len + 1);
dst[out_len] = 0;
}
return out_len;
}
size_t os_utf8_to_wcs(const char *str, size_t len, wchar_t *dst,
size_t dst_size)
{
size_t in_len;
size_t out_len;
if (!str)
return 0;
in_len = len ? len : strlen(str);
out_len = dst ? (dst_size - 1) : utf8_to_wchar(str, in_len, NULL, 0, 0);
if (dst) {
if (!dst_size)
return 0;
if (out_len)
out_len =
utf8_to_wchar(str, in_len, dst, out_len + 1, 0);
dst[out_len] = 0;
}
return out_len;
}
size_t os_wcs_to_mbs(const wchar_t *str, size_t len, char *dst, size_t dst_size)
{
UNUSED_PARAMETER(len);
size_t out_len;
if (!str)
return 0;
out_len = dst ? (dst_size - 1) : wcstombs(NULL, str, 0);
if (dst) {
if (!dst_size)
return 0;
if (out_len)
out_len = wcstombs(dst, str, out_len + 1);
dst[out_len] = 0;
}
return out_len;
}
size_t os_wcs_to_utf8(const wchar_t *str, size_t len, char *dst,
size_t dst_size)
{
size_t in_len;
size_t out_len;
if (!str)
return 0;
in_len = (len != 0) ? len : wcslen(str);
out_len = dst ? (dst_size - 1) : wchar_to_utf8(str, in_len, NULL, 0, 0);
if (dst) {
if (!dst_size)
return 0;
if (out_len)
out_len =
wchar_to_utf8(str, in_len, dst, out_len + 1, 0);
dst[out_len] = 0;
}
return out_len;
}
size_t os_mbs_to_wcs_ptr(const char *str, size_t len, wchar_t **pstr)
{
if (str) {
size_t out_len = os_mbs_to_wcs(str, len, NULL, 0);
*pstr = bmalloc((out_len + 1) * sizeof(wchar_t));
return os_mbs_to_wcs(str, len, *pstr, out_len + 1);
} else {
*pstr = NULL;
return 0;
}
}
size_t os_utf8_to_wcs_ptr(const char *str, size_t len, wchar_t **pstr)
{
if (str) {
size_t out_len = os_utf8_to_wcs(str, len, NULL, 0);
*pstr = bmalloc((out_len + 1) * sizeof(wchar_t));
return os_utf8_to_wcs(str, len, *pstr, out_len + 1);
} else {
*pstr = NULL;
return 0;
}
}
size_t os_wcs_to_mbs_ptr(const wchar_t *str, size_t len, char **pstr)
{
if (str) {
size_t out_len = os_wcs_to_mbs(str, len, NULL, 0);
*pstr = bmalloc((out_len + 1) * sizeof(char));
return os_wcs_to_mbs(str, len, *pstr, out_len + 1);
} else {
*pstr = NULL;
return 0;
}
}
size_t os_wcs_to_utf8_ptr(const wchar_t *str, size_t len, char **pstr)
{
if (str) {
size_t out_len = os_wcs_to_utf8(str, len, NULL, 0);
*pstr = bmalloc((out_len + 1) * sizeof(char));
return os_wcs_to_utf8(str, len, *pstr, out_len + 1);
} else {
*pstr = NULL;
return 0;
}
}
size_t os_utf8_to_mbs_ptr(const char *str, size_t len, char **pstr)
{
char *dst = NULL;
size_t out_len = 0;
if (str) {
wchar_t *wstr = NULL;
size_t wlen = os_utf8_to_wcs_ptr(str, len, &wstr);
out_len = os_wcs_to_mbs_ptr(wstr, wlen, &dst);
bfree(wstr);
}
*pstr = dst;
return out_len;
}
size_t os_mbs_to_utf8_ptr(const char *str, size_t len, char **pstr)
{
char *dst = NULL;
size_t out_len = 0;
if (str) {
wchar_t *wstr = NULL;
size_t wlen = os_mbs_to_wcs_ptr(str, len, &wstr);
out_len = os_wcs_to_utf8_ptr(wstr, wlen, &dst);
bfree(wstr);
}
*pstr = dst;
return out_len;
}
/* locale independent double conversion from jansson, credit goes to them */
static inline void to_locale(char *str)
{
const char *point;
char *pos;
point = localeconv()->decimal_point;
if (*point == '.') {
/* No conversion needed */
return;
}
pos = strchr(str, '.');
if (pos)
*pos = *point;
}
static inline void from_locale(char *buffer)
{
const char *point;
char *pos;
point = localeconv()->decimal_point;
if (*point == '.') {
/* No conversion needed */
return;
}
pos = strchr(buffer, *point);
if (pos)
*pos = '.';
}
double os_strtod(const char *str)
{
char buf[64];
strncpy(buf, str, sizeof(buf) - 1);
buf[sizeof(buf) - 1] = 0;
to_locale(buf);
return strtod(buf, NULL);
}
int os_dtostr(double value, char *dst, size_t size)
{
int ret;
char *start, *end;
size_t length;
ret = snprintf(dst, size, "%.17g", value);
if (ret < 0)
return -1;
length = (size_t)ret;
if (length >= size)
return -1;
from_locale(dst);
/* Make sure there's a dot or 'e' in the output. Otherwise
a real is converted to an integer when decoding */
if (strchr(dst, '.') == NULL && strchr(dst, 'e') == NULL) {
if (length + 3 >= size) {
/* No space to append ".0" */
return -1;
}
dst[length] = '.';
dst[length + 1] = '0';
dst[length + 2] = '\0';
length += 2;
}
/* Remove leading '+' from positive exponent. Also remove leading
zeros from exponents (added by some printf() implementations) */
start = strchr(dst, 'e');
if (start) {
start++;
end = start + 1;
if (*start == '-')
start++;
while (*end == '0')
end++;
if (end != start) {
memmove(start, end, length - (size_t)(end - dst));
length -= (size_t)(end - start);
}
}
return (int)length;
}
static int recursive_mkdir(char *path)
{
char *last_slash;
int ret;
ret = os_mkdir(path);
if (ret != MKDIR_ERROR)
return ret;
last_slash = strrchr(path, '/');
if (!last_slash)
return MKDIR_ERROR;
*last_slash = 0;
ret = recursive_mkdir(path);
*last_slash = '/';
if (ret == MKDIR_ERROR)
return MKDIR_ERROR;
ret = os_mkdir(path);
return ret;
}
int os_mkdirs(const char *dir)
{
struct dstr dir_str;
int ret;
dstr_init_copy(&dir_str, dir);
dstr_replace(&dir_str, "\\", "/");
ret = recursive_mkdir(dir_str.array);
dstr_free(&dir_str);
return ret;
}
const char *os_get_path_extension(const char *path)
{
for (size_t pos = strlen(path); pos > 0; pos--) {
switch (path[pos - 1]) {
case '.':
return path + pos - 1;
case '/':
case '\\':
return NULL;
}
}
return NULL;
}
static inline bool valid_string(const char *str)
{
while (str && *str) {
if (*(str++) != ' ')
return true;
}
return false;
}
static void replace_text(struct dstr *str, size_t pos, size_t len,
const char *new_text)
{
struct dstr front = {0};
struct dstr back = {0};
dstr_left(&front, str, pos);
dstr_right(&back, str, pos + len);
dstr_copy_dstr(str, &front);
dstr_cat(str, new_text);
dstr_cat_dstr(str, &back);
dstr_free(&front);
dstr_free(&back);
}
static void erase_ch(struct dstr *str, size_t pos)
{
struct dstr new_str = {0};
dstr_left(&new_str, str, pos);
dstr_cat(&new_str, str->array + pos + 1);
dstr_free(str);
*str = new_str;
}
char *os_generate_formatted_filename(const char *extension, bool space,
const char *format)
{
time_t now = time(0);
struct tm *cur_time;
cur_time = localtime(&now);
struct obs_video_info ovi;
obs_get_video_info(&ovi);
const size_t spec_count = 23;
static const char *spec[][2] = {
{"%CCYY", "%Y"}, {"%YY", "%y"}, {"%MM", "%m"}, {"%DD", "%d"},
{"%hh", "%H"}, {"%mm", "%M"}, {"%ss", "%S"}, {"%%", "%%"},
{"%a", ""}, {"%A", ""}, {"%b", ""}, {"%B", ""},
{"%d", ""}, {"%H", ""}, {"%I", ""}, {"%m", ""},
{"%M", ""}, {"%p", ""}, {"%S", ""}, {"%y", ""},
{"%Y", ""}, {"%z", ""}, {"%Z", ""},
};
char convert[128] = {0};
struct dstr sf;
struct dstr c = {0};
size_t pos = 0;
dstr_init_copy(&sf, format);
while (pos < sf.len) {
const char *cmp = sf.array + pos;
for (size_t i = 0; i < spec_count && !convert[0]; i++) {
size_t len = strlen(spec[i][0]);
if (astrcmp_n(cmp, spec[i][0], len) == 0) {
if (strlen(spec[i][1]))
strftime(convert, sizeof(convert),
spec[i][1], cur_time);
else
strftime(convert, sizeof(convert),
spec[i][0], cur_time);
dstr_copy(&c, convert);
if (c.len && valid_string(c.array))
replace_text(&sf, pos, len, convert);
}
}
if (!convert[0]) {
if (astrcmp_n(cmp, "%FPS", 4) == 0) {
if (ovi.fps_den <= 1) {
snprintf(convert, sizeof(convert), "%u",
ovi.fps_num);
} else {
const double obsFPS =
(double)ovi.fps_num /
(double)ovi.fps_den;
snprintf(convert, sizeof(convert),
"%.2f", obsFPS);
}
replace_text(&sf, pos, 4, convert);
} else if (astrcmp_n(cmp, "%CRES", 5) == 0) {
snprintf(convert, sizeof(convert), "%ux%u",
ovi.base_width, ovi.base_height);
replace_text(&sf, pos, 5, convert);
} else if (astrcmp_n(cmp, "%ORES", 5) == 0) {
snprintf(convert, sizeof(convert), "%ux%u",
ovi.output_width, ovi.output_height);
replace_text(&sf, pos, 5, convert);
} else if (astrcmp_n(cmp, "%VF", 3) == 0) {
strcpy(convert, get_video_format_name(
ovi.output_format));
replace_text(&sf, pos, 3, convert);
} else if (astrcmp_n(cmp, "%s", 2) == 0) {
snprintf(convert, sizeof(convert), "%" PRId64,
(int64_t)now);
replace_text(&sf, pos, 2, convert);
}
}
if (convert[0]) {
pos += strlen(convert);
convert[0] = 0;
} else if (!convert[0] && sf.array[pos] == '%') {
erase_ch(&sf, pos);
} else {
pos++;
}
}
if (!space)
dstr_replace(&sf, " ", "_");
if (extension && *extension) {
dstr_cat_ch(&sf, '.');
dstr_cat(&sf, extension);
}
dstr_free(&c);
if (sf.len > 255)
dstr_mid(&sf, &sf, 0, 255);
return sf.array;
}