April 26, 1986 Modified -- June 4, 1986 Changed so that it automatically recognizes LaTeX source and ignores several environment modes such as array. Modified (Version 2.0) -- June 30, 1984 Now handles white space in sequences like "\begin { document }". Detex is not as easily confused by such things as display mode ends and begins that don't match up. Modified -- September 19, 1986 Added the "-e " option to ignore specified LaTeX environments. Modified -- June 30, 1987 Added the "-n" no-follow option, to allow detex to ignore \input and \include commands. Also changed the algorithm for locating the input files. It now interprets the "." more reasonably (i.e. it is not always the beginning of an extension). Modified -- December 15, 1988 Added handling of verbatim environment in LaTeX mode and added it to the list of modes ignored by default. Because of limitations with lex, it was necessary to shorten the names of some of the existing start states before adding a new one (ugh). Modified -- January 3, 1988 Added ignore of \$ inside $$ (math) pair. Modified (Version 2.2) -- June 25, 1990 Control sequences are no longer replaced by space, but just removed. This means accents no longer cause output words to be broken. The "-c" option was added to show the arguments of \cite, \ref, and \pageref macros. This is useful when using something like style on the output. Modified (Version 2.3) -- September 7, 1990 Fixed the handling of Ctl mode a little better and added an exception for \index on suggestions from kcb@hss.caltech.edu (KC Border). Also changed the value for DEFAULTINPUTS to coincide with a local change. Modified -- February 10, 1991 Added -t option to force TeX mode even when seeing the "\begin{document}" string in the input. Modified -- February 23, 1991 Based on suggestions from pinard@iro.umontreal.ca (Francois Pinard), I added support for the SysV string routines (-DUSG), added defines for the flex lexical scanner (-DFLEX_SCANNER), changed NULL to '\0' when using it as a character (his sys defined NULL as (void *)0), changed the Makefile to use ${CC} instead of cc, and added comments about the new compile time options. Modified (Version 2.4) -- September 2, 1992 Corrected the way CITEBEGIN worked. Due to serious braindeath I had the condition wrong in the if test. It should be (fLatex && !fCite). This solves the problem a couple people reported with amstex style \ref entries. Added a preprocessing sed(1) command to replace all the long, easy to read state names with short two letter state names (SA-S?) so that lex won't overflow and I don't have to keep shortening the state names every time I add one. If a state is added, it must also be added to states.sed (order is important) along with its unique S? replacement. Added \pagestyle, \setcounter, and \verb handling from K.Sattar@cs.exeter.ac.uk (Khalid Sattar). Also allows invocation as "delatex" to force LaTeX mode. Applied patches from queinnec@cenatls.cena.dgac.fr (Philippe Queinnec) to handle nested {}s in state (\bibitem, \cite, \index). Added special ligature handling (\aa, \ae, \oe, \l, \o, \i, \j, \ss) at the suggestion of gwp@dido.caltech.edu (G. W. Pigman II). Cleaned up the comments on detex.h, added mathmatica to DEFAULTENV. Modified (Version 2.5) -- January 28, 1993 Leading spaces in macros are no longer stripped. This means "foo\footnote{ bar}" comes out as "foo bar" instead of "foobar". Fixed special ligature handling so it works in cases line {\ss} instead of just when followed by a space. Modified (Version 2.6) -- July 30, 1993 Added OS/2 port from hankedr@mail.auburn.edu (Darrel R Hankerson). Added handling of leading and trailing ':' in TEXINPUTS per the latest TeX as suggested by jnp@tfl.dk (J|rgen N|rgaard). Changed the way the input path is constructed in SetInputPaths() so we never try to modify a constant string. Changed the way the the ignore environment list is contructed in SetEnvIgnore() so we never try to modify a constant string. Changed the USG define to HAVE_STRING_H. Fixed the states.sed script so it only replaces "Input" in the correct places. I would like to use the \< \> word separator patterns but they are not supported by all versions of sed. This as least works. Changed the detex.c target in the Makefile to use a temporary file because I experienced problems (segmentation fault) with lex on Solaris 2.1 when input was from stdin. Modified (Version 2.7) -- September 10, 1997 Removed line breaks in detex.l between a few patterns and actions. It appears that flex is no longer able to handle this. Thanks to Anthony Harris and Marty Leisner for reporting this. Porting notes -- March 30, 1992 When using gcc, or compiling on a NeXT, you should compile with -fwritable-strings. With the change to SetInputPaths() in 2.6 this should no longer be necessary. On a NeXT, it has been reported that lex replaces the '\0' with NULL, and then the compiler complains about it. I think this is an old bug that is no longer applicable. July 30, 1993 The flex scanner generator does not work because it does not handle input buffering the same way as lex. I don't know of any reasonable way to rewrite detex to get around this problem. May 25, 1995 According to alain@ia1.u-strasbg.fr (Alain Ketterlin), using flex allows 8-bit characters to be handled correctly. Modified (Version 2.8) -- January 1, 2008 Added NCSA/University of Illinois Open Source License to facilitate free redistribution. (Version 2.8.1) -- October 2, 2008 First version of OpenDetex. Making program compile on modern UNIX systems; many fixes in LaTeX code handling (quotes, figure and table environments, headings and many more). (Version 2.8.2) -- February, 2016 Improved ANSI C compatibility. Used kpse_find_file() and kpse_program_name(). Handle `\kern', allow `em/ex'for dimensions, handle glue specs. Added the never-interactive option to prevent flex from creating a problematic prototype for isatty(). Renamed ERROR -> my_ERROR to avoid a conflict with WIN32 headers. Used binary mode for output file (Peter Breitenlohner and Werner Lemberg) Insert a space in place of right curly brace (Eric Miotto). Provide 'make uninstall'. Install man page when running 'make install'. (Version 2.8.3) -- February, 2018 Added -r option that replaces math environments with nouns and verbs in a way that keeps sentences readable. Thanks to Sophie Huiberts. Changed Makefile to fix a Mac OS X problem where frequently an empty output file was produced. Removed states.sed that modified detex.l to avoid Lex memory overrun - no longer needed on current machines. Added detex.c to the distributed package to allow compiling OpenDetex without having Flex. Removed 'mathmatica' from the default list of environments which contents are ignored - 'mathmatica' is not supported by TeX. Added more ignored environments: algorithm, align, smallmatrix and several more. Fixed compilation on Cygwin. Removed special files for OS/2 - they required compilers that no longer exist. OpenDetex should be able to be compiled using GCC for OS/2.