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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <error.h>
include <fset.h>
define MIN_BUFSIZE 512
# FCOPY -- Copy a file. Works for either text or binary files. The new file
# will not be created unless the input file can be opened successfully. All
# buffer space is dynamically allocated, and buffer sizes are automatically
# adjusted by the system for efficient sequential access (the actual buffer
# size is dependent on the machine, device, and file type).
procedure fcopy (oldfile, newfile)
char oldfile[ARB]
char newfile[ARB]
int in, out, file_type, fd
int open(), access(), fsfopen(), fstdfile()
errchk open, fcopyo, access
begin
if (access (oldfile, 0, TEXT_FILE) == YES)
file_type = TEXT_FILE
else
file_type = BINARY_FILE
in = open (oldfile, READ_ONLY, file_type)
if (fstdfile (newfile, out) == NO) {
iferr (call fmkcopy (oldfile, newfile)) {
call close (in)
call erract (EA_ERROR)
}
out = open (newfile, APPEND, file_type)
}
# Warn user if the file being copied has subfiles.
ifnoerr (fd = fsfopen (oldfile, READ_ONLY)) {
call close (fd)
call eprintf ("Warning from fcopy: file `%s' has subfiles\n")
call pargstr (oldfile)
}
# Copy the file.
call fcopyo (in, out)
call close (in)
call close (out)
end
# FCOPYO -- Copy a file, where both the input and output files have
# already been open. Works regardless of the datatype of the files.
procedure fcopyo (in, out)
int in # input file descriptor
int out # output file descriptor
pointer sp, buf
int buf_size
int fstati(), read()
errchk read, write
begin
call smark (sp)
# Set up file buffers, intermediate buffer for efficient
# sequential i/o (advice is ignored if text file). Local buffer
# is made same size as FIO buffer.
call fseti (in, F_ADVICE, SEQUENTIAL)
call fseti (out, F_ADVICE, SEQUENTIAL)
buf_size = max (MIN_BUFSIZE, fstati (in, F_BUFSIZE))
call salloc (buf, buf_size, TY_CHAR)
while (read (in, Memc[buf], buf_size) != EOF)
call write (out, Memc[buf], fstati (in, F_NCHARS))
call sfree (sp)
end
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