Revision Notes

Versions

Modified how tmp variables are initially created, old way created one a time. New way, creates 1000 at a time
Modified how hsms msgs are read, old way was one char at a time, New way attempts to read up to 1k blocks
Fixed bug with get_tmp_var() function, where var's with vals equal to "", were not returned. The "dump" cmd worked OK
Added a LOG msg when reading hsms msgs after the read is complete and before decoding happens

#include (Include file)

#define name (define a name)

#define name=value (define a name with a value)

#ifdef name, #else, and #endif (Conditionally include program statements)

· Modifed the sc read command to include preprocessing options:

-P (turn on preprocessing)

-D name (define a name)

-D name=value (define a name with a value)

-I path (define a path for include files)

Modifed the sc commands to allow for abbreviated usage: read, list, kill, etc...
Supports C style comments in sc programs (/*... */)
Added sc check for missing closing (\")s and (')s

SML format for float values, F4 and F8, now allow the value to be entered in hex format (‘\xhhh...hh’). Use single quotes, not double, because the hex value will be converted into a hex value, first 2 bytes.
Modified how sc runs in debug mode (-d). Now uses a file, sc.debug, to define which modules prints debug statements. The level defined with the –d is needed to define the level of debug within the modules.

The storage of program tokens has been modified. Before, token values were stored as null terminated strings. Now they are stored with defined length. This will allow token values to contain null characters. Example: the string “Hello\x00World” can now be properly stored.

Like token values above, tmp variables are now stored with a defined length. Now a secs message with an ASCII data type can contain null characters.
The creation of tmp variables from secs messages has been modified. In the past, the decode secs message was converted into name/value pairs. The values were “” delimited. This presented a problem if the value contained a “ (ex: <A “The pump is “ON””>, the value returned was “The pump is” because the “ON” terminated the string prematurely). Now tmp variables are created directly from the decode secs message. This will create a problem with existing applications if users were coding around this bug.

Pragmas are now supported. They are used to control features of sc. New features can be enabled using a pragma as well as supporting existing functionality. Current pragmas include:

LOG_CPU_USAGE – When defined, logs a cpu usage message in the logs.
SHOW_NON_PRINTING_CHARS_IN_BRACES – When defined, instructs sc to show non-printing chars as {hh} in the log files, or other output, instead of showing them as \xhh.
NO_BLOCK_ON_SLEEP – When defined, instructs sc to not block on the sleep command, but to use an internal sc timer instead. While sleeping, sc can handle other events and commands.
NO_SOURCE_CODE_LINE_NUMBERS – When defined, instructs sc not to show the source code file and line number when an error or warning is detected. Source code and line numbers are still displayed for fatal error conditions.

New data type called local_var, which is used to define local variables. Local variables can be used after a label to define a local instance of that variable. Local vars can be initially assigned to an expression. local_var x = 5*100

New functions, trace(1) and trace(0), to turn on and off sc program statements being logged as they are executed.
Fixed the list command
Added an optional no_parese parameter to the system command to not parse those characters.
User variables and tmp variables no longer share the same space. Each is stored in separate areas.
Modifed how for loops are implemented. They now use a “nest” count just like while loops.

Gosub’s with parameters are now supported. Parameters can be both passed by reference and passed by value. Example: gosub add ($value1, $value2, result). Value1 and value2 are passed by value, while result is passed by reference.

Added a cpu usage LOG statement when sc goes idle
Fixed a bug with secs/hsms msgs and the W bit flag where sc was waiting for a reply even when the W bit was not set
Fixed a bug with the unary +
Added the ~ one's complement unary operator
Fixed a bug where the command line arguments were generating errors if not enough supplied

Fix a bug where function calls within function calls were not working. This bug was introduced a few versions ago.

New command \"load\" that works just like the old \"read\" command (included in version 2.0.3)
New operand \"^\" for bitwise xor-ing
Fixed bug with the \"open\" command and the \"error=<>, no_error\", this did not work before

Mod so that tmp variables are kept separate form others. Did this for performance reasons.
Fixed an old bug where is_tmp_var() returned true when the tmp variable did not exist.
Fixed core dump for \"sc -i -c \" , the -c option has no argument
Fixed bug with no_error within a gosub, and not being able to return

Fixed sc looping problem with connected client
Mod the disconnect routine in server.c. This had some bugs handling clients and servers that terminate.
Mod how the hsms sends messages, This was causing some problems with tools

Fix bug for program files that have the <cr><nl>. This is treated as a single <nl>
Fixed a sc -r mistake about the break/break_loop statements
Now supports the // style comments
Fixed a bug in the htof() function

New function get_client() to return the connected client
New function get_version() to get the current version of sc
Function names are no longer reserved, and can now be used as variables names too
Optional arg to the send command to allow sending a message to a connected client

Modify the sleep command to not block, but allow other sc activity while sleeping, and continue once the sleep is completed – Added in version 2.1