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os: add x64 mode for struct and raw read/write (#9512)

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This commit is contained in:
Bastian Buck 2021-03-30 11:40:23 +02:00 committed by GitHub
parent b40d06ec1e
commit 15d9f50be9
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 113 additions and 28 deletions
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105
vlib/os/file.c.v
View File

@ -448,7 +448,7 @@ pub fn (mut f File) read_struct<T>(mut t T) ? {
}
// read_struct_at reads a single struct of type `T` at position specified in file
pub fn (mut f File) read_struct_at<T>(mut t T, pos int) ? {
pub fn (mut f File) read_struct_at<T>(mut t T, pos u64) ? {
if !f.is_opened {
return none
}
@ -457,9 +457,23 @@ pub fn (mut f File) read_struct_at<T>(mut t T, pos int) ? {
return none
}
C.errno = 0
mut nbytes := 0
$if x64 {
$if windows {
C._fseeki64(f.cfile, pos, C.SEEK_SET)
nbytes = int(C.fread(t, 1, tsize, f.cfile))
C._fseeki64(f.cfile, 0, C.SEEK_END)
} $else {
C.fseeko(f.cfile, pos, C.SEEK_SET)
nbytes = int(C.fread(t, 1, tsize, f.cfile))
C.fseeko(f.cfile, 0, C.SEEK_END)
}
}
$if x32 {
C.fseek(f.cfile, pos, C.SEEK_SET)
nbytes := int(C.fread(t, 1, tsize, f.cfile))
nbytes = int(C.fread(t, 1, tsize, f.cfile))
C.fseek(f.cfile, 0, C.SEEK_END)
}
if C.errno != 0 {
return error(posix_get_error_msg(C.errno))
}
@ -490,7 +504,7 @@ pub fn (mut f File) read_raw<T>() ?T {
}
// read_raw_at reads and returns a single instance of type `T` starting at file byte offset `pos`
pub fn (mut f File) read_raw_at<T>(pos int) ?T {
pub fn (mut f File) read_raw_at<T>(pos u64) ?T {
if !f.is_opened {
return none
}
@ -499,17 +513,46 @@ pub fn (mut f File) read_raw_at<T>(pos int) ?T {
return none
}
C.errno = 0
mut nbytes := 0
mut t := T{}
$if x64 {
$if windows {
if C._fseeki64(f.cfile, pos, C.SEEK_SET) != 0 {
return error(posix_get_error_msg(C.errno))
}
nbytes = int(C.fread(&t, 1, tsize, f.cfile))
if C.errno != 0 {
return error(posix_get_error_msg(C.errno))
}
if C._fseeki64(f.cfile, 0, C.SEEK_END) != 0 {
return error(posix_get_error_msg(C.errno))
}
} $else {
if C.fseeko(f.cfile, pos, C.SEEK_SET) != 0 {
return error(posix_get_error_msg(C.errno))
}
nbytes = int(C.fread(&t, 1, tsize, f.cfile))
if C.errno != 0 {
return error(posix_get_error_msg(C.errno))
}
if C.fseeko(f.cfile, 0, C.SEEK_END) != 0 {
return error(posix_get_error_msg(C.errno))
}
}
}
$if x32 {
if C.fseek(f.cfile, pos, C.SEEK_SET) != 0 {
return error(posix_get_error_msg(C.errno))
}
mut t := T{}
nbytes := int(C.fread(&t, 1, tsize, f.cfile))
nbytes = int(C.fread(&t, 1, tsize, f.cfile))
if C.errno != 0 {
return error(posix_get_error_msg(C.errno))
}
if C.fseek(f.cfile, 0, C.SEEK_END) != 0 {
return error(posix_get_error_msg(C.errno))
}
}
if nbytes != tsize {
return error_with_code('incomplete struct read', nbytes)
}
@ -536,7 +579,7 @@ pub fn (mut f File) write_struct<T>(t &T) ? {
}
// write_struct_at writes a single struct of type `T` at position specified in file
pub fn (mut f File) write_struct_at<T>(t &T, pos int) ? {
pub fn (mut f File) write_struct_at<T>(t &T, pos u64) ? {
if !f.is_opened {
return error('file is not opened')
}
@ -545,9 +588,23 @@ pub fn (mut f File) write_struct_at<T>(t &T, pos int) ? {
return error('struct size is 0')
}
C.errno = 0
mut nbytes := 0
$if x64 {
$if windows {
C._fseeki64(f.cfile, pos, C.SEEK_SET)
nbytes = int(C.fwrite(t, 1, tsize, f.cfile))
C._fseeki64(f.cfile, 0, C.SEEK_END)
} $else {
C.fseeko(f.cfile, pos, C.SEEK_SET)
nbytes = int(C.fwrite(t, 1, tsize, f.cfile))
C.fseeko(f.cfile, 0, C.SEEK_END)
}
}
$if x32 {
C.fseek(f.cfile, pos, C.SEEK_SET)
nbytes := int(C.fwrite(t, 1, tsize, f.cfile))
nbytes = int(C.fwrite(t, 1, tsize, f.cfile))
C.fseek(f.cfile, 0, C.SEEK_END)
}
if C.errno != 0 {
return error(posix_get_error_msg(C.errno))
}
@ -578,7 +635,7 @@ pub fn (mut f File) write_raw<T>(t &T) ? {
}
// write_raw_at writes a single instance of type `T` starting at file byte offset `pos`
pub fn (mut f File) write_raw_at<T>(t &T, pos int) ? {
pub fn (mut f File) write_raw_at<T>(t &T, pos u64) ? {
if !f.is_opened {
return error('file is not opened')
}
@ -586,16 +643,46 @@ pub fn (mut f File) write_raw_at<T>(t &T, pos int) ? {
if tsize == 0 {
return error('struct size is 0')
}
mut nbytes := 0
$if x64 {
$if windows {
if C._fseeki64(f.cfile, pos, C.SEEK_SET) != 0 {
return error(posix_get_error_msg(C.errno))
}
nbytes = int(C.fwrite(t, 1, tsize, f.cfile))
if C.errno != 0 {
return error(posix_get_error_msg(C.errno))
}
if C._fseeki64(f.cfile, 0, C.SEEK_END) != 0 {
return error(posix_get_error_msg(C.errno))
}
} $else {
if C.fseeko(f.cfile, pos, C.SEEK_SET) != 0 {
return error(posix_get_error_msg(C.errno))
}
nbytes = int(C.fwrite(t, 1, tsize, f.cfile))
if C.errno != 0 {
return error(posix_get_error_msg(C.errno))
}
if C.fseeko(f.cfile, 0, C.SEEK_END) != 0 {
return error(posix_get_error_msg(C.errno))
}
}
}
$if x32 {
if C.fseek(f.cfile, pos, C.SEEK_SET) != 0 {
return error(posix_get_error_msg(C.errno))
}
nbytes := int(C.fwrite(t, 1, tsize, f.cfile))
nbytes = int(C.fwrite(t, 1, tsize, f.cfile))
if C.errno != 0 {
return error(posix_get_error_msg(C.errno))
}
if C.fseek(f.cfile, 0, C.SEEK_END) != 0 {
return error(posix_get_error_msg(C.errno))
}
}
if nbytes != tsize {
return error_with_code('incomplete struct write', nbytes)
}

2
vlib/os/os_c.v
View File

@ -25,8 +25,6 @@ fn C.CopyFile(&u32, &u32, int) int
fn C.execvp(file charptr, argv &charptr) int
// fn C.lstat(charptr, voidptr) u64
fn C._wstat64(charptr, voidptr) u64
// fn C.proc_pidpath(int, byteptr, int) int