news27

su 的源代码库

	E.g., to search for all occurances of sugethw in files
	on the current directory tree:
		Grep sugethw
	Caveats: It is confusing to redirect the output into
		a file in the current directory tree.  Recursive
		shells are inherently dangerous. 
	==> Author: Jack Cohen

cwp/shell/zap.sh -- destroy processes by name (including patterns)
	E.g. when finished running a demo that puts up numerous
	xmovie windows:
		zap xmovie
	Similarly:
		zap 'xmovie|xgraph'
	Caveats:  All processes with the given name(s) will be
		terminated (e.g. emacs xmovie.c &).  Shells
		that destroy processes are inherently dangerous.
	==> Author: Jack Cohen (after Kernighan and Ritchie)

psplot/main/pslabel.c -- output PostScript file consisting of a single TEXT
	string on a specified background. (Use with psmerge to label plots.)
	==> Author: John E. Anderson, Mobil
================================================================

New Third Party Software:
================================================================
================================================================

Changes:
================================================================
User's Manual -- added acknowledgements for off-site contributers,
	updated discussion of the demos

su/main/xxxx -- better cast of tr.dt before conversion to seconds.
	==> Thanks to Stew Levin, Mobil

su/main/segyclean.c -- cleared ntr field
	==> Thanks to Stew Levin, Mobil

su/main/suaddhead.c -- neat simplification of code
	==> Thanks to Stew Levin, Mobil

su/main/suaddnoise.c -- better cast in signal() calls
	==> Thanks to Stew Levin, Mobil

su/main/suchw.c -- now allows setting multiple values for each of
	the key1, key2, key3, a,b,c,d   getparred fields.

su/main/sugain.c -- fixed round off error bug in agc
	==> Thanks to Toralf Foerster, Germany

su/main/sugain.c -- fixed bug in do_clip that reversed polarity
	of large negatives.
	==> Thanks to Timo Tjan

su/main/sugethw.c -- accepts the key= syntax (see par/lib/getpars.c
	entry below).  Option added to produce data in the
	 multicolumn format used in setting geometry.

su/main/sumute.c -- permit muting parameters to be input as binary files.
	==> Thanks to Hakan Karazincir (CSM) for the suggestion.

su/main/suop.c -- fixed to return 0 for operations slog and slog10
	when the input contains 0 values instead of aborting.

su/main/supack2.c -- made portable to machines where shorts are not 2 bytes
	==> Thanks to Stew Levin, Mobil

su/main/supaste.c -- more robust use of fread
	==> Thanks to Stew Levin, Mobil

su/main/supgc.c -- corrected conversion of tr.dt to seconds

su/main/suradon.c -- supplied missing static declarations.
	==> Thanks to Stew Levin, Mobil

su/main/surange.c -- better cast in signal() calls
	==> Thanks to Stew Levin, Mobil

su/main/sureduce.c -- removed redundant declarations

su/main/sushw.c -- now allows setting multiple key fields either
	from commandline arguments or from data in a binary file.
	==> Thanks to Stew Levin, Mobil, for a first draft of the
	    multiple commandline code
 
su/main/susynlv.c,susynlvcw.c,susynlvxz.c,susynlvxzcs.c -- changed
	verbose default to false; corrected verbose info output

su/main/sustatic.c -- added the capability for inputting the
	receiver and source static corrections from files.
	==> Thanks to Timo Tjan

su/main/sutsq.c -- fixed munged tmin getpar.
	==> Thanks to Stew Levin, Mobil

su/main/suunpack2.c -- made portable to machines where shorts are not 2 bytes
	==> Thanks to Stew Levin, Mobil

su/main/suxcor.c -- extended to permit the cross correlation of
	panels, permitting both spatially and temporally
	varying cross correlation.
	==> Thanks to Timo Tjan

su/main/suxwigb.c, suximage.c, suxmovie.c, suxgraph.c -- windows close on
	keyboard q or Q.  See notes below on xwigb/ximage, and
	xmovie/xgraph for further caveats and credits.

su/lib/fgettr.c -- fvgettr tried to access an empty trace structure
	the first time it was called.
	==> Thanks to James C. Childress, Cray, Houston

su/shell/sukeyword.sh -- now finds the new 'ntr' keyword; pager
	now hard-wired as 'more'. Much redundancy removed.
	==> Thanks to Toralf Foerster, Germany

par/main/farith.c -- Fixed bug in slowp and slothp options.
	==> Thanks to Zhenyue Liu.

par/main/b2a.c -- printf statement allowed inadvertent concatenation
	of the two numbers.
	==> Thanks to Alexander Koek, Delft University of Technology

par/main/unisam2.c -- now allows specification of uniform input
	samples without listing each sample on the command line.

par/lib/getpars.c -- added getnparstringarray and getparstringarray
	to permit arrays of strings delimited by commas (so no
	commas permitted as parts of an individual string).  This
	allows command line syntax like "key=tracl,dt,ns" in
	appropriate programs (sushw.c, suchw.c, ...).  Of course,
	the old getnparstring and getparstring remain for
	getparring general strings.

par/lib/modeling.c -- added portability casts
	==> Thanks to Stew Levin, Mobil

cwp/include/cwp.h -- protect complex and dcomplex defs with #ifndef
	==> Thanks to Stew Levin, Mobil

psplot/main/pswigb.c -- updated endian handling

psplot/main/pswigb.c -- added portability casts
	==> Thanks to Stew Levin, Mobil

psplot/lib/psAxesbox3.c, psContour.c -- added portability casts
	==> Thanks to Stew Levin, Mobil

xplot/main/xwigb.c -- now automatically senses the endian of the display
	machine to prevent the endian mismatch problem formerly
	seen when xwigb was run on a machine with a different endian
	than the machine where the Xwindows graphics is displayed.
	==> Thanks to Morten Pedersen, CSM

xplot/main/xwigb.c -- if you redirect output to a file, then keypress
	p or P produces a PostScript file of the current view in that
	file.
	==> Thanks to Stew Levin, Mobil

xplot/main/xwigb.c, ximage.c -- now windows close on keyboard q (as well
	as on keyboard Q).

Xtcwp/main/xmovie.c, xgraph.c -- windows close on keyboard q or Q
	Note: this doesn't work under the linux fvwm window manager.
	==> Thanks to William Wingle, CSM, for the keyboard code

Xtcwp/main/xgraph.c -- added portability casts
	==> Thanks to Stew Levin, Mobil

Xtcwp/lib/Axes.c -- added portability casts and inserted missing static
	keywords
	==> Thanks to Stew Levin, Mobil
================================================================

Unresolved Issues
================================================================
-Xtcwp/main/xmovie
The grid1=, grid2= options cause an abort under linux/XFree86 and
possibly other platforms.  Message is:
	Error: Cannot perform malloc
This seems like a compiler error since innocuous changes in the code
or compiling without optimization makes the problem go away.  We
distributed the current version (27) with such an innocuous change
to accomodate this: we changed the dimension of args[] from 100 to 98.

-Support for the alternate data formats in SEG-Y
Remco Romyn of Delft University of Technology and others
have suggested support for other formats such as
(2 bytes fixed point).  The bit manipulations needed
to convert such data to IEEE are not known to us.

-Ability to print PostScript from xwigb, donated
by Stew Levin of Mobil, will probably be in version 28

-Improvements for su/include trace header handing
Donated by Stew Levin of Mobil, still under study here.

-xdr external data representation
Routines for xdr have been donated by Stew Levin of Mobil,
still under study here.
================================================================