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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <error.h>
# HEAD -- Print the head (first few lines) of each of the named text files on
# the standard output. If more than one file is to be printed, a brief header
# is printed for each file.
#
# Params:
# input_files file matching template
# nlines [h,8] number of lines to be printed
procedure t_head()
char fname[SZ_FNAME]
bool multiple_files
int nlines, list
int clpopni(), clplen(), clgfil(), clgeti()
begin
list = clpopni ("input_files")
multiple_files = (clplen (list) > 1)
nlines = clgeti ("nlines")
while (clgfil (list, fname, SZ_FNAME) != EOF)
iferr (call print_head (STDOUT, fname, nlines, multiple_files))
call erract (EA_WARN)
call clpcls (list)
end
# PRINT_HEAD -- Print the first few lines of a file on the output stream given
# as the first argument, optionally plus a header.
procedure print_head (out, fname, nlines, print_file_name)
int out, nlines
bool print_file_name
char fname[SZ_FNAME], lbuf[SZ_LINE]
int in, line, open(), getline()
errchk open, getline, putline
begin
in = open (fname, READ_ONLY, TEXT_FILE)
if (print_file_name) {
call fprintf (out, "\n\n===> %s <===\n")
call pargstr (fname)
}
for (line=1; line <= nlines && getline(in,lbuf) != EOF; line=line+1)
call putline (out, lbuf)
call close (in)
end
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