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authorAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
committerAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
commitfa095a4504cbe668e4244547e2c141597bea4ecf (patch)
tree06135820a286ffec47804e75fbf8a147e92acd2e /lib/unilbrk/lbrktables.h
Imported Upstream version 0.9.1upstream/0.9.1
Diffstat (limited to 'lib/unilbrk/lbrktables.h')
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1 files changed, 94 insertions, 0 deletions
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+/* Line breaking auxiliary tables.
+ Copyright (C) 2001-2003, 2006-2008 Free Software Foundation, Inc.
+ Written by Bruno Haible <bruno@clisp.org>, 2001.
+
+ This program is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "unitypes.h"
+
+/* Line breaking classification. */
+
+enum
+{
+ /* Values >= 24 are resolved at run time. */
+ LBP_BK = 24, /* mandatory break */
+/*LBP_CR, carriage return - not used here because it's a DOSism */
+/*LBP_LF, line feed - not used here because it's a DOSism */
+ LBP_CM = 25, /* attached characters and combining marks */
+/*LBP_NL, next line - not used here because it's equivalent to LBP_BK */
+/*LBP_SG, surrogates - not used here because they are not characters */
+ LBP_WJ = 0, /* word joiner */
+ LBP_ZW = 26, /* zero width space */
+ LBP_GL = 1, /* non-breaking (glue) */
+ LBP_SP = 27, /* space */
+ LBP_B2 = 2, /* break opportunity before and after */
+ LBP_BA = 3, /* break opportunity after */
+ LBP_BB = 4, /* break opportunity before */
+ LBP_HY = 5, /* hyphen */
+ LBP_CB = 28, /* contingent break opportunity */
+ LBP_CL = 6, /* closing punctuation */
+ LBP_EX = 7, /* exclamation/interrogation */
+ LBP_IN = 8, /* inseparable */
+ LBP_NS = 9, /* non starter */
+ LBP_OP = 10, /* opening punctuation */
+ LBP_QU = 11, /* ambiguous quotation */
+ LBP_IS = 12, /* infix separator (numeric) */
+ LBP_NU = 13, /* numeric */
+ LBP_PO = 14, /* postfix (numeric) */
+ LBP_PR = 15, /* prefix (numeric) */
+ LBP_SY = 16, /* symbols allowing breaks */
+ LBP_AI = 29, /* ambiguous (alphabetic or ideograph) */
+ LBP_AL = 17, /* ordinary alphabetic and symbol characters */
+ LBP_H2 = 18, /* Hangul LV syllable */
+ LBP_H3 = 19, /* Hangul LVT syllable */
+ LBP_ID = 20, /* ideographic */
+ LBP_JL = 21, /* Hangul L Jamo */
+ LBP_JV = 22, /* Hangul V Jamo */
+ LBP_JT = 23, /* Hangul T Jamo */
+ LBP_SA = 30, /* complex context (South East Asian) */
+ LBP_XX = 31 /* unknown */
+};
+
+#include "lbrkprop1.h"
+
+static inline unsigned char
+unilbrkprop_lookup (ucs4_t uc)
+{
+ unsigned int index1 = uc >> lbrkprop_header_0;
+ if (index1 < lbrkprop_header_1)
+ {
+ int lookup1 = unilbrkprop.level1[index1];
+ if (lookup1 >= 0)
+ {
+ unsigned int index2 = (uc >> lbrkprop_header_2) & lbrkprop_header_3;
+ int lookup2 = unilbrkprop.level2[lookup1 + index2];
+ if (lookup2 >= 0)
+ {
+ unsigned int index3 = uc & lbrkprop_header_4;
+ return unilbrkprop.level3[lookup2 + index3];
+ }
+ }
+ }
+ return LBP_XX;
+}
+
+/* Table indexed by two line breaking classifications. */
+#define D 1 /* direct break opportunity, empty in table 7.3 of UTR #14 */
+#define I 2 /* indirect break opportunity, '%' in table 7.3 of UTR #14 */
+#define P 3 /* prohibited break, '^' in table 7.3 of UTR #14 */
+
+extern const unsigned char unilbrk_table[24][24];
+
+/* We don't support line breaking of complex-context dependent characters
+ (Thai, Lao, Myanmar, Khmer) yet, because it requires dictionary lookup. */