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Linux Experimental Support (DON'T USE IT PLEASE)

This commit is contained in:
gingerBill 2016-05-17 01:09:32 +01:00
parent 2549e8dad0
commit 3110f509e3
1 changed files with 15 additions and 48 deletions
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63
gb.h
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@ -1,4 +1,4 @@
/* gb.h - v0.15c - Ginger Bill's C Helper Library - public domain
/* gb.h - v0.15d - Ginger Bill's C Helper Library - public domain
- no warranty implied; use at your own risk
This is a single header file with a bunch of useful stuff
@ -37,6 +37,7 @@ Conventions used:
Version History:
0.15d - Linux Experimental Support (DON'T USE IT PLEASE)
0.15c - Linux Experimental Support (DON'T USE IT)
0.15b - C90 Support
0.15a - gb_atomic(32|64)_spin_(lock|unlock)
@ -243,11 +244,11 @@ extern "C" {
#include <malloc.h> /* NOTE(bill): _aligned_*() */
#include <intrin.h>
#else
#include <stdlib.h> /* NOTE(bill): malloc */
#include <dlfcn.h>
#include <fcntl.h>
#include <pthread.h>
#include <sys/sendfile.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
@ -6688,65 +6689,31 @@ gb_file_last_write_time(char const *filepath, ...)
return cast(gbFileTime)result;
}
/* IMPORTANT TODO(bill): remove eventually! */
#include <stdio.h>
gb_inline b32
gb_file_copy(char const *existing_filename, char const *new_filename, b32 fail_if_exists)
{
int fd_to, fd_from;
u8 buf[4096];
isize read_bytes;
int saved_errno;
isize size;
int existing_fd = open(existing_filename, O_RDONLY, 0);
int new_fd = open(new_filename, O_WRONLY|O_CREAT, 0666);
fd_from = open(existing_filename, O_RDONLY);
if (fd_from < 0) return false;
fd_to = open(new_filename, O_RDONLY);
if (fd_to >= 0 && fail_if_exists)
goto err_cleanup;
struct stat stat_existing;
fstat(existing_fd, &stat_existing);
fd_to = open(new_filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (fd_to < 0)
goto err_cleanup;
size = sendfile(new_fd, existing_fd, 0, stat_existing.st_size);
while (read_bytes = read(fd_from, buf, gb_size_of(buf)), read_bytes > 0) {
u8 *out = buf;
isize written_bytes;
close(new_fd);
close(existing_fd);
do {
written_bytes = write(fd_to, out, read_bytes);
if (written_bytes >= 0) {
read_bytes -= written_bytes;
out += written_bytes;
} else if (errno != EINTR) {
goto err_cleanup;
}
} while (read_bytes > 0);
}
if (read_bytes == 0) {
if (close(fd_to) < 0) {
fd_to = -1;
goto err_cleanup;
}
close(fd_from);
return true; /* NOTE(bill): IT WORKED! */
}
err_cleanup:
saved_errno = errno;
close(fd_from);
if (fd_to >= 0) close(fd_to);
errno = saved_errno;
return false;
return size == stat_existing.st_size;
}
gb_inline b32
gb_file_move(char const *existing_filename, char const *new_filename)
{
/* TODO(bill): Is this TOO HACKY?! rename() would do fine really but it's in stdio */
return system(gb_sprintf("mv %s %s", existing_filename, new_filename)) == 0;
return rename(existing_filename, new_filename) == 0;
}
#endif