Description:
Convert a date/time string to linear time.

Files:
doc/parse-datetime.texi
lib/parse-datetime.h
lib/parse-datetime.y
m4/tm_gmtoff.m4
m4/parse-datetime.m4

Depends-on:
assert-h
bison
c99
c-ctype
stdbool
gettime
gettext-h
idx
intprops
inttypes
mktime
nstrftime
setenv
stdckdint
unsetenv
time-h
time_r
time_rz
timegm

configure.ac:
gl_PARSE_DATETIME

Makefile.am:
# The Automake generated .y.c rule is broken: When executed in a VPATH build,
#   - The .c file gets generated in the build directory. But since it requires
#     special tools to rebuild it, we need to distribute it in the tarballs,
#     and by the GNU Coding Standards
#     <https://www.gnu.org/prep/standards/html_node/Makefile-Basics.html>
#     the file should be generated in the source directory.
#   - The #line directives in the .c file refer to a nonexistent file once it
#     has been moved from the build directory to the source directory. This
#     leads to error if 'lcov' is used later.
# Additionally, here we assume GNU Bison and therefore don't need the ylwrap
# script.
# Therefore we override this rule.
# Since this is a rule that produces multiple files, we apply the idiom from
# <https://lists.gnu.org/archive/html/bug-make/2020-09/msg00008.html>, so that
# it works also in parallel 'make'.
generate-parse-datetime:
	$(AM_V_YACC)$(PARSE_DATETIME_BISON) -d $(YFLAGS) $(AM_YFLAGS) $(srcdir)/parse-datetime.y \
	&& test ':' = '$(PARSE_DATETIME_BISON)' || { \
	  sed -e 's|".*/parse-datetime\.y"|"parse-datetime.y"|' \
	      -e 's|"parse-datetime\.tab\.c"|"parse-datetime.c"|' \
	      -e 's|"parse-datetime\.tab\.h"|"parse-datetime-gen.h"|' \
	      < parse-datetime.tab.c > parse-datetime.c-tmp \
	  && sed -e 's|".*/parse-datetime\.y"|"parse-datetime.y"|' \
	         -e 's|"parse-datetime\.tab\.h"|"parse-datetime-gen.h"|' \
	         < parse-datetime.tab.h > parse-datetime-gen.h-tmp \
	  && rm -f parse-datetime.tab.c parse-datetime.tab.h \
	  && mv parse-datetime.c-tmp $(srcdir)/parse-datetime.c \
	  && mv parse-datetime-gen.h-tmp $(srcdir)/parse-datetime-gen.h; \
	}
.PHONY: generate-parse-datetime
# The above rule will generate files with time stamp order
# parse-datetime.y <= parse-datetime.c <= parse-datetime-gen.h.
parse-datetime.c: parse-datetime.y
	@{ test -f $(srcdir)/parse-datetime.c && test ! $(srcdir)/parse-datetime.c -ot $(srcdir)/parse-datetime.y; } || $(MAKE) generate-parse-datetime
parse-datetime-gen.h: parse-datetime.c
	@{ test -f $(srcdir)/parse-datetime-gen.h && test ! $(srcdir)/parse-datetime-gen.h -ot $(srcdir)/parse-datetime.c; } || $(MAKE) generate-parse-datetime
lib_SOURCES += parse-datetime.y
BUILT_SOURCES += parse-datetime.c parse-datetime-gen.h
MOSTLYCLEANFILES += parse-datetime.tab.c parse-datetime.tab.h parse-datetime.c-tmp parse-datetime-gen.h-tmp
MAINTAINERCLEANFILES += parse-datetime.c parse-datetime-gen.h
EXTRA_DIST += parse-datetime.c parse-datetime-gen.h

Include:
"parse-datetime.h"

License:
LGPLv2+

Maintainer:
Paul Eggert