Commits on Oct 28, 2024

1. ed: start breaking up edParse() …

   * Unhook commands E, e, f, H, h, P, Q and q from the large regex in edParse(); the idea is to remove the large regex entirely
   * Commands E, e and f allow zero or one argument; the other commands require no argument
   * None of these commands allows an address prefix, e.g. 1,2P is invalid
   * When testing against GNU ed I discovered "f FILENAME" should still print the filename when setting it
   * Later the remaining commands can be removed from the large regex if calculateLine() function strips address prefix from $_ at start of edParse()
   
   %perl ed # start with empty buffer and no saved filename
   P     ---> toggle * prompt
   *e a.c   ---> start editing file a.c
   197
   *H   --->  toggle auto-help
   *123d
   ?
   invalid address  ---> error message displays by itself
   *H  ---> disable auto-help
   *,d   ---> delete all lines
   *h  ---> display previous error saved from 123d command
   invalid address
   *E   ---> reload a.c because I don't want to delete all lines
   197
   *f  ---> show saved filename
   a.c
   *f a.c.copy ---> set new filename to write to
   a.c.copy
   *1,2d ---> delete first two lines
   *w ---> write changes to a.c.copy
   158
   *q

   

   mknos authored Oct 28, 2024
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