REVISION CONTROL INFORMATION SOURCE VOLOPUAOPUA2SISSIS11COMMONSRCSISCOMMANDRCSCOMMANDDOCV

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REVISION CONTROL INFORMATION SOURCE VOLOPUAOPUA2SISSIS11COMMONSRCSISCOMMANDRCSCOMMANDDOCV

(2 CCR 5021) REVISIONS TO SECTIONS 211203 AND 2112031
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0 12 4TRIAZOLE– REVISION OF DT50 JULY 2011 (REVISED 

/*
 * Revision Control Information
 *
 * $Source: /vol/opua/opua2/sis/sis-1.1/common/src/sis/command/RCS/command.doc,v $
 * $Author: sis $
 * $Revision: 1.3 $
 * $Date: 1992/05/06 18:51:44 $
 *
 */
void
com_add_command(name, func, changes_network)
char *name;
int (*func)();
int changes_network;

	Adds a command to the command table.  If name already defines an
	existing command, its definition is replaced.  func is a function
	pointer to code of the form:

		com_quit(network, argc, argv)
		network_t **network;
		int argc;
		char **argv;
		{
		    return EOF;
		}

	Note the double de-reference on the network which is passed to
	the command; this allows the command to replace the current
	network.  argv[0] will generally be the command name, and
	argv[1] ... argv[argc-1] are the arguments for the command.

	getopt() can be used to parse the arguments, but getopt_reset() 
	must be used before calling getopt().  See getopt(3) for more
	details.

	The command function should return 0 for normal operation, 1
	for any error.  The changes_network flag is used to
	automatically save the network before executing the command (in
	order to support undo).

	An example command function which parses performs argument
	parsing can be found in test/proto.c.




array_t *
com_get_nodes(network, argc, argv)
network_t *network;
int argc;
char **argv;

	Converts the arguments into a vector of nodes.  '*' stands for all
	nodes (including each primary input node, and each primary output
	node).  Functional notation allows i() for all primary inputs,
	and i(node) for all fanin's to node.  Also, o() for all primary
	outputs, and o(node) for all fanouts of a node.




array_t *
com_get_true_nodes(network, argc, argv)
network_t *network;
int argc;
char **argv;

	Converts the arguments into a vector of nodes.  '*' stands for all
	nodes (including each primary input node, and each primary output
	node).  Functional notation allows i() for all primary inputs,
	and i(node) for all fanin's to node.  Also, o() for all TRUE primary
	outputs, and o(node) for all fanouts of a node. NOTE: Actual primary
	output nodes are returned, NOT their fanin node.




char *
com_get_flag(flag)
char *flag;

	The command parser maintains a table of named values.  These
	are manipulated using the 'set' and 'unset' commands.  The
	value of the named flag is returned, or NIL(char) is returned
	if the flag has not been set.




FILE *
com_open_file(filename, mode, real_filename, silent)
char *filename;
char *mode;
char **real_filename;
int silent;

	Opens the file with the given mode (see fopen()).  Tilde
	expansion (~user/ or ~/) is performed on the filename, and "-"
	is allowed as a synonym for stdin (or stdout, depending on the
	mode).  If the file cannot be opened, a message is reported
	using perror(); the silent flag, if true, suppresses this error
	action.  In either case, A NULL file pointer is returned if any
	error occurs.  The filename (after tilde expansion) is returned in
	the pointer real_filename, if real_filename is non-empty.  This
	is a pointer which should be free'd when you are done with it.



com_execute(network, line)
network_t **network;
char *line;

	Execute a command line.  This is the top-level of the command
	interpreter, and supports multiple commands (separated by ;),
	alias substitution, etc.  For many simple operations, com_execute()
	is the easiest way to accomplish a given task.
	
	Example: read a network from a file:

		network = network_alloc;
		com_execute(&network, "read_blif filename");

	Note that network must already exist.  Use network_alloc() to 
	create an empty network first.

int com_graphics_enabled()

	Returns 1 if sis is in graphics mode, 0 otherwise.

FILE *com_graphics_open(type,title,cmd)
char *type;
char *title;
char *cmd;

	Initiate a graphics command sent to a window of the given type,
	with the given name.  Returns the stream which should be used
	to send command-specific data to the graphical front end.

void com_graphics_close(stream)
FILE *stream;

	Indicate the end of the command-specific data and wait for
	an acknowledgement from the graphics front end that the data
	was received.

void com_graphics_exec(type,title,cmd,data)
char *type;
char *title;
char *cmd;
char *data;

	Convenience function for issuing a graphics command with very
	simple data.  Equivalent to a com_graphics_open/fprintf/
	com_graphics_close sequence.


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