CVS commit: src/usr.bin/make

["Roland Illig" <rillig%netbsd.org@localhost>]

Module Name:    src
Committed By:   rillig
Date:           Sun Jul 26 15:09:10 UTC 2020

Modified Files:
        src/usr.bin/make: buf.c buf.h var.c

Log Message:
make(1): add Buffer functions for common tasks

Adding a string or a substring to a buffer are common tasks when handling
variables.  There is no need to spell out the strlen call or the pointer
subtraction at every call site.

Subtracting pointers results in a ptrdiff_t, which would have to be
converted to an int in each case for WARNS=6. Having this conversion in a
single place keeps the code clean.


To generate a diff of this commit:
cvs rdiff -u -r1.27 -r1.28 src/usr.bin/make/buf.c
cvs rdiff -u -r1.20 -r1.21 src/usr.bin/make/buf.h
cvs rdiff -u -r1.312 -r1.313 src/usr.bin/make/var.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.