diff --git a/2000/schneiderwent/README.md b/2000/schneiderwent/README.md index ae90ea971..938561721 100644 --- a/2000/schneiderwent/README.md +++ b/2000/schneiderwent/README.md @@ -19,8 +19,11 @@ make ```sh ./schneiderwent schneiderwent.data +./schneiderwent ``` +What's the difference? + ## Judges' remarks: Very nice play by the rules and portable text obfuscation. @@ -35,46 +38,43 @@ keeping the program portable between different encodings This entry displays the current time to the console, for example: - it's just after ten 'til 6 in the evening +> it's just after ten 'til 6 in the evening FWIW, none of the compilers with which this entry was tested issued any warnings or errors in compiling the source for this entry. No doubt lint will complain about the goto statements. -The schneiderwent.data file consists of the values used by multiple -table lookups. This is simply good program design, separating -these values from the source code allows changing the behavior of -the application without recompiling. +The [schneiderwent.data](schneiderwent.data) file consists of the values used by +multiple table lookups. This is simply good program design, separating these +values from the source code allows changing the behavior of the application +without recompiling. -Having learned COBOL at an early age, the pthreads of my thought +Having learned COBOL at an early age, the `pthread`s of my thought processes tend to be translated into code in a verbose manner. Some -of the #defines in this entry's code are to mitigate this personal +of the `#define`s in this entry's code are to mitigate this personal deficiency. +### Obfuscation + Obfuscation in this entry consists of: -* printfing console messages stored as EBCDIC character values - this is not an -attempt at encryption, but rather at cross platform compatibility +* `printf()`ing console messages stored as EBCDIC character values - this is not +an attempt at encryption, but rather at cross platform compatibility. * ASCII character values are calculated from the EBCDIC in a particularly ugly -abuse of the '?' operator -* detection of whether to print the ASCII or EBCDIC values is done by taking the -remainder of dividing the character 'J' by 2 - the ASCII value of the character -is even, the EBCDIC value is odd - -* the messages to be printfed are determined via multiple table lookups and -bitmasked values - -* for minutes, the bit position turned on is multiplied by two to determine the -message to be printfed - -* for hours, the straight bit position is used - -* this entry mostly eschews function calls for the often overlooked -setjmp/longjmp combination - -* the trigraphs are not there as obfuscation nor are they there to annoy the +abuse of the '?' operator. +* Detection of whether to print the ASCII or EBCDIC values is done by taking the +remainder of dividing the character `'J'` by `2` - the ASCII value of the +character is even, the EBCDIC value is odd. +* The messages to be `printf`ed are determined via multiple table lookups and +bit-masked values. +* For minutes, the bit position turned on is multiplied by two to determine the +message to be `printf`ed. +* For hours, the straight bit position is used. +* This entry mostly eschews function calls for the often overlooked +setjmp/longjmp combination. +* The trigraphs are not there as obfuscation nor are they there to annoy the judges - it's just the easiest way to get around the absence of square brackets -in a normal 3270 environment +in a normal 3270 environment. ## Copyright and CC BY-SA 4.0 License: