limitations

早期freebsd实现

This file describes limits of gawk on a Unix system (although it
is variable even then).  Non-Unix systems may have other limits.

# of fields in a record:  MAX_INT
Length of input record:  MAX_INT 
Length of output record:  unlimited
Size of a field:  MAX_INT 
Size of a printf string:  MAX_INT 
Size of a literal string:  MAX_INT 
Characters in a character class:  2^(# of bits per byte)
# of file redirections:  unlimited
# of pipe redirections:  min(# of processes per user, # of open files)
double-precision floating point
Length of source line:  unlimited