/usr/share/pcb/m4/zif.inc is in pcb-common 20140316-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | define(`PKG_ZIF',
`define(`NUMPINS', `$4')
define(`CENTER', eval(NUMPINS*19))
Element(0x00 "$1" "`$2'" "$3" 100 CENTER 0 100 0x00)
(
define(`X', 0)
define(`count', 1)
forloop(`i', 1, NUMPINS,
`PAD(X, 12, X, 97, 24, count)' `define(`count', incr(count))'
`define(`X', eval(X+39))'
)
PAD(-124, -41, -124, -151, 82, eval(NUMPINS+1))
PAD(eval(X+124-39), -41, eval(X+124-39), -151, 82, eval(NUMPINS+2))
)')
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