/* Case-mapping context of suffix UTF-8/UTF-16/UTF-32 string.
- Copyright (C) 2009 Free Software Foundation, Inc.
+ Copyright (C) 2009-2011 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2009.
This program is free software: you can redistribute it and/or modify it
/* Evaluate all three conditions in a single pass through the string S.
The three variables are -1 as long as the value of the condition has
not been determined. */
- int scc_FINAL_SIGMA = -1;
+ ucs4_t first_char_except_ignorable = (ucs4_t)(-1);
int scc_MORE_ABOVE = -1;
int scc_BEFORE_DOT = -1;
const UNIT *s_end = s + n;
ucs4_t uc;
int count = U_MBTOUC_UNSAFE (&uc, s, s_end - s);
- if (scc_FINAL_SIGMA < 0)
- {
- if (uc_is_cased (uc))
- scc_FINAL_SIGMA = SCC_FINAL_SIGMA_MASK;
- else if (!uc_is_case_ignorable (uc))
- scc_FINAL_SIGMA = 0;
- }
+ if (first_char_except_ignorable == (ucs4_t)(-1))
+ {
+ if (!uc_is_case_ignorable (uc))
+ first_char_except_ignorable = uc;
+ }
if (scc_MORE_ABOVE < 0)
- {
- int ccc = uc_combining_class (uc);
- if (ccc == UC_CCC_A)
- scc_MORE_ABOVE = SCC_MORE_ABOVE_MASK;
- else if (ccc == UC_CCC_NR)
- scc_MORE_ABOVE = 0;
- }
+ {
+ int ccc = uc_combining_class (uc);
+ if (ccc == UC_CCC_A)
+ scc_MORE_ABOVE = SCC_MORE_ABOVE_MASK;
+ else if (ccc == UC_CCC_NR)
+ scc_MORE_ABOVE = 0;
+ }
if (scc_BEFORE_DOT < 0)
- {
- if (uc == 0x0307) /* COMBINING DOT ABOVE */
- scc_BEFORE_DOT = SCC_BEFORE_DOT_MASK;
- else
- {
- int ccc = uc_combining_class (uc);
- if (ccc == UC_CCC_A || ccc == UC_CCC_NR)
- scc_BEFORE_DOT = 0;
- }
- }
+ {
+ if (uc == 0x0307) /* COMBINING DOT ABOVE */
+ scc_BEFORE_DOT = SCC_BEFORE_DOT_MASK;
+ else
+ {
+ int ccc = uc_combining_class (uc);
+ if (ccc == UC_CCC_A || ccc == UC_CCC_NR)
+ scc_BEFORE_DOT = 0;
+ }
+ }
- if ((scc_FINAL_SIGMA | scc_MORE_ABOVE | scc_BEFORE_DOT) >= 0)
- /* All conditions have been determined. */
- break;
+ if (first_char_except_ignorable != (ucs4_t)(-1)
+ && (scc_MORE_ABOVE | scc_BEFORE_DOT) >= 0)
+ /* All conditions have been determined. */
+ break;
s += count;
}
/* For those conditions that have not been determined so far, use the
value from the argument context. */
+ context.first_char_except_ignorable =
+ (first_char_except_ignorable != (ucs4_t)(-1)
+ ? first_char_except_ignorable
+ : a_context.first_char_except_ignorable);
context.bits =
- (scc_FINAL_SIGMA >= 0
- ? scc_FINAL_SIGMA
- : a_context.bits & SCC_FINAL_SIGMA_MASK)
- | (scc_MORE_ABOVE >= 0
- ? scc_MORE_ABOVE
- : a_context.bits & SCC_MORE_ABOVE_MASK)
+ (scc_MORE_ABOVE >= 0
+ ? scc_MORE_ABOVE
+ : a_context.bits & SCC_MORE_ABOVE_MASK)
| (scc_BEFORE_DOT >= 0
? scc_BEFORE_DOT
: a_context.bits & SCC_BEFORE_DOT_MASK);