TACL Programming Guide

Listing a File
Accessing Files
107365 Tandem Computers Incorporated 4–19
Figure 4-7. Listing a File (Page 4 of 5)
== The following variables keep track of the line number,
== page number, and number of lines already written to
== a page (for calculation of automatic page break).
#SET line_num 1
#SET page_num 1
#SET lines_out 0
#SET match_string \NEW
#OUTPUT \STYLE FORM WIDTH 132 CHARS
get_dates
output_banner
== Start the read operation; place the record into line.
#APPEND prompt *start*
#EXTRACTV rec_inp line
[#LOOP |WHILE| NOT err_inp |DO|
== If the line equals \NEW, perform a page break.
[#IF [#MATCH *[match_string]* [line]] |THEN|
#OUTPUT \NEW
output_banner
#SET lines_out 0
== Otherwise, output the line number and the line.
|ELSE|
#OUTPUT/HOLD,WIDTH 3,COLUMN 1,JUSTIFY RIGHT,FILL &
ZERO/ [line_num]
#OUTPUT/HOLD,WIDTH 1/
#OUTPUTV line
#SET lines_out [#COMPUTE lines_out + 1]
]
== If the page is full, issue a page break.
[#IF (lines_out = max_lines) |THEN|
#OUTPUT \NEW
output_banner
#SET lines_out 0
]
== Move the next record into line.
#APPEND prompt *start*
#EXTRACTV rec_inp line
== Increment the line counter.
#SET line_num [#COMPUTE line_num + 1]
] == end LOOP