Imported Upstream version 0.1.18upstream/0.1.18upstream

3 files changed, 731 insertions, 0 deletions

diff --git a/src/thcell/Makefile.am b/src/thcell/Makefile.am
new file mode 100644
index 0000000..690576f
--- /dev/null
+++ b/src/thcell/Makefile.am
@@ -0,0 +1,8 @@
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diff --git a/src/thcell/Makefile.in b/src/thcell/Makefile.in
new file mode 100644
index 0000000..e9c34da
--- /dev/null
+++ b/src/thcell/Makefile.in
@@ -0,0 +1,506 @@
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+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
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diff --git a/src/thcell/thcell.c b/src/thcell/thcell.c
new file mode 100644
index 0000000..3f8536e
--- /dev/null
+++ b/src/thcell/thcell.c
@@ -0,0 +1,217 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * libthai - Thai Language Support Library
+ * Copyright (C) 2001  Theppitak Karoonboonyanan <thep@linux.thai.net>
+ *
+ * This library 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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 library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+/*
+ * thcell_t.c - Thai string cell custering
+ * Created: 2001-08-08 (split from thrend.c)
+ * Author: Theppitak Karoonboonyanan <thep@linux.thai.net>
+ */
+
+#include <thai/thcell.h>
+#include <thai/thctype.h>
+#include <thai/wtt.h>
+#include <thai/tis.h>
+
+#define is_composible(c1,c2) (TACio_op(c1,c2)==CP)
+
+/**
+ * @brief  Initialize a Thai cell
+ *
+ * @param  cell : pointer to the cell to initialize
+ *
+ * Initializes values in the Thai cell struct.
+ */
+void
+th_init_cell (struct thcell_t *cell)
+{
+    cell->base = 0;
+    cell->hilo = 0;
+    cell->top = 0;
+}
+
+/**
+ * @brief  Get first cell from string
+ *
+ * @param  s    : the string
+ * @param  len  : the length of string
+ * @param  cell : the output buffer
+ * @param  is_decomp_am : whether SARA AM is to be decomposed into 
+ *                        NIKHANIT and SARA AA and to be in separate cells
+ *
+ * @returns  total chars consumed by the cell
+ *
+ * Gets first cell from the string bounded by @a s and @a len, and, if @a cell
+ * is not null, stores the cell data in it.
+ */
+size_t
+th_next_cell (const thchar_t *s, size_t len,
+              struct thcell_t *cell, int is_decomp_am)
+{
+    size_t n = 0;
+    struct thcell_t acell;
+    acell.base = acell.hilo = acell.top = 0;
+    if (len > 0) {
+        do {
+            switch (th_chlevel (*s)) {
+            case 0:
+                if (is_decomp_am && *s == TIS_SARA_AM) {
+                    acell.hilo = *s++;
+                } else {
+                    acell.base = *s++;
+                }
+                break;
+            case -1:
+            case 1:
+                acell.hilo = *s++;
+                break;
+            case 2:
+                acell.top  = *s++;
+                break;
+            case 3:
+                if (!acell.hilo) {
+                    acell.hilo = *s++;
+                } else {
+                    acell.top = *s++;
+                }
+                break;
+            }
+            ++n; --len;
+        } while (
+            len > 0 && (
+                is_composible (s[-1], s[0]) || (
+                    is_decomp_am && s[0] == TIS_SARA_AM
+                    && th_isthcons (acell.base) && acell.hilo == 0
+                )
+            )
+        );
+    }
+    if (cell) {
+        *cell = acell;
+    }
+    return n;
+}
+
+/**
+ * @brief  Get previous cell from string
+ *
+ * @param  s    : the string
+ * @param  pos  : the position in string to get cell previous to
+ * @param  cell : the output buffer
+ * @param  is_decomp_am : whether SARA AM is to be decomposed into 
+ *                        NIKHANIT and SARA AA and to be in separate cells
+ *
+ * @returns  total chars consumed by the cell
+ *
+ * Gets last cell from the string bounded by @a s and @a pos, and if @a cell
+ * is not null, stores the cell data in it.
+ */
+size_t
+th_prev_cell (const thchar_t *s, size_t pos,
+              struct thcell_t *cell, int is_decomp_am)
+{
+    size_t n = 0;
+    struct thcell_t acell;
+    acell.base = acell.hilo = acell.top = 0;
+    if (pos > 0) {
+        do {
+            thchar_t c = s[pos-1];
+            switch (th_chlevel (c)) {
+            case 0:
+                if (is_decomp_am && c == TIS_SARA_AM) {
+                    acell.hilo = c;
+                } else {
+                    acell.base = c;
+                }
+                break;
+            case 1: 
+                if (acell.hilo && th_chlevel(acell.hilo) == 3) {
+                    acell.top = acell.hilo;
+                }
+                /* fall through */
+            case -1:
+                acell.hilo = c;
+                break;
+            case 2:
+                acell.top  = c;
+                break;
+            case 3:
+                if (!acell.hilo) {
+                    acell.hilo = c;
+                } else {
+                    acell.top = c;
+                }
+                break;
+            }
+            ++n; --pos;
+        } while (
+            pos > 0 && (
+                is_composible (s[pos-1], s[pos]) || (
+                    acell.hilo == TIS_SARA_AM &&
+                    !acell.base && (
+                        (!acell.top && th_isthtone (s[pos-1])) ||
+                        th_isthcons (s[pos-1])
+                    )
+                )
+            )
+        );
+    }
+    if (cell) {
+        *cell = acell;
+    }
+    return n;
+}
+
+/**
+ * @brief  Tokenize string into cells
+ *
+ * @param  s      : the string
+ * @param  len    : the length of string
+ * @param  cells  : the array of output cells buffer
+ * @param  ncells : the address of integer storing the number of cells 
+ *                  provided by the buffer, and to keep the number of resulting 
+ *                  cells on return
+ * @param  is_decomp_am : whether SARA AM is to be decomposed into 
+ *                        NIKHANIT and SARA AA and to be in separate cells
+ *
+ * @returns  total characters consumed
+ *
+ * Tokenizes the string bounded by @a s and @a len into cells, and stores
+ * at most @a *ncells resulting cells in the @a cells buffer. On return,
+ * @a *ncells is also set to the total cells stored in @a cells[].
+ */
+size_t
+th_make_cells (const thchar_t *s, size_t len,
+               struct thcell_t cells[], size_t *ncells, int is_decomp_am)
+{
+    size_t left = *ncells;
+    size_t nchars = 0;
+
+    while (len > 0 && left > 0) {
+        size_t n = th_next_cell(s + nchars, len, cells, is_decomp_am);
+        nchars += n; len -= n;
+        ++cells; --left;
+    }
+    *ncells -= left;
+    return nchars;
+}
+
+/*
+vi:ts=4:ai:expandtab
+*/