/usr/share/calc/help/estr is in apcalc-common 2.12.4.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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estr - represent some types of value by text strings
SYNOPSIS
estr(x)
TYPES
x null, string, real or complex number, list, matrix,
object. block, named block, error
return string
DESCRIPTION
This function attempts to represent x exactly by a string s of
ordinary text characters such that eval(s) == x.
If x is null, estr(x) returns the string "".
If x is a string, estr(x) returns the string in which occurrences of
newline, tab, ", \, etc. have been converted to \n, \t, \",
\\, etc., '\0' to \000 or \0 according as the next character is
or is not an octal digit, and other non-text characters to their
escaped hex representation, e.g. char(165) becomes \xa5.
For real x, estr(x) represebts x in fractional mode.
EXAMPLE
; estr("abc\0xyz\00023\n\xa5\r\n")
""abc\0xyz\00023\n\xa5\r\n""
; estr(1.67)
"167/100"
; estr(mat[3] = {2, list(3,5), "abc"})
"mat[3]={2,list(3,5),"abc""
LIMITS
none
LINK LIBRARY
none
SEE ALSO
str, strprintf
## Copyright (C) 2006 Ernest Bowen
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
## Public License for more details.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL. You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
##
## @(#) $Revision: 30.1 $
## @(#) $Id: estr,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/estr,v $
##
## Under source code control: 2006/08/20 14:45:13
## File existed as early as: 2006
##
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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