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Teach regular expression operators to honor collations.

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This involves getting the character classification and case-folding
functions in the regex library to use the collations infrastructure.
Most of this work had been done already in connection with the upper/lower
and LIKE logic, so it was a simple matter of transposition.

While at it, split out these functions into a separate source file
regc_pg_locale.c, so that they can be correctly labeled with the Postgres
project's license rather than the Scriptics license.  These functions are
100% Postgres-written code whereas what remains in regc_locale.c is still
mostly not ours, so lumping them both under the same copyright notice was
getting more and more misleading.
This commit is contained in:
Tom Lane
2011-04-10 18:02:17 -04:00
parent 210f95f1cd
commit 1e16a8107d
12 changed files with 821 additions and 194 deletions
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3
src/backend/regex/Makefile
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@@ -17,6 +17,7 @@ OBJS = regcomp.o regerror.o regexec.o regfree.o
include $(top_srcdir)/src/backend/common.mk
# mark inclusion dependencies between .c files explicitly
regcomp.o: regcomp.c regc_lex.c regc_color.c regc_nfa.c regc_cvec.c regc_locale.c
regcomp.o: regcomp.c regc_lex.c regc_color.c regc_nfa.c regc_cvec.c \
regc_locale.c regc_pg_locale.c
regexec.o: regexec.c rege_dfa.c