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[Qemu-devel] [PATCH v2 2/4] rules.mak: New string testing functions
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH v2 2/4] rules.mak: New string testing functions |
Date: |
Fri, 13 Sep 2013 18:25:52 +0100 |
Add new string testing functions which return a y/n result:
eq : are two strings equal (ignoring leading/trailing space)?
ne : are two strings unequal?
isempty : is a string empty?
notempty : is a string non-empty?
Based on an idea by Ákos Kovács <address@hidden>.
Signed-off-by: Peter Maydell <address@hidden>
---
rules.mak | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/rules.mak b/rules.mak
index 65a1b96..49edb9b 100644
--- a/rules.mak
+++ b/rules.mak
@@ -106,6 +106,17 @@ leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
# Logical if: like make's $(if) but with an leqv-like test
lif = $(if $(subst n,,$1),$2,$3)
+# String testing functions: inputs to these can be any string;
+# the output is always either "y" or "n". Leading and trailing whitespace
+# is ignored when comparing strings.
+# String equality
+eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
+# String inequality
+ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
+# Emptiness/non-emptiness tests:
+isempty = $(if $1,n,y)
+notempty = $(if $1,y,n)
+
# Generate files with tracetool
TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
--
1.7.9.5
- [Qemu-devel] [PATCH v2 0/4] avoid CONFIG_NO_* using rules.mak logic/string fns, Peter Maydell, 2013/09/13
- [Qemu-devel] [PATCH v2 3/4] Makefile.target: CONFIG_NO_* variables removed, Peter Maydell, 2013/09/13
- [Qemu-devel] [PATCH v2 2/4] rules.mak: New string testing functions,
Peter Maydell <=
- [Qemu-devel] [PATCH v2 4/4] default-configs/: CONFIG_GDBSTUB_XML removed, Peter Maydell, 2013/09/13
- [Qemu-devel] [PATCH v2 1/4] rules.mak: New logical functions for handling y/n values, Peter Maydell, 2013/09/13
- Re: [Qemu-devel] [PATCH v2 0/4] avoid CONFIG_NO_* using rules.mak logic/string fns, Paolo Bonzini, 2013/09/13
- Re: [Qemu-devel] [PATCH v2 0/4] avoid CONFIG_NO_* using rules.mak logic/string fns, Peter Maydell, 2013/09/26