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+//=========================================================================
+// FILENAME	: textutils.c
+// DESCRIPTION	: Misc. text utilities
+//=========================================================================
+// Copyright (c) 2008- NETGEAR, Inc. All Rights Reserved.
+//=========================================================================
+
+/* This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "misc.h"
+#include "textutils.h"
+#include "../log.h"
+
+static unsigned int
+_char_htoi(char h)
+{
+  if (h<'0')
+    return 0;
+  if (h<='9')
+    return h-'0';
+  if (h<'A')
+    return 0;
+  if (h<='F')
+    return h-'A'+10;
+  if (h<'a')
+    return 0;
+  if (h<='f')
+    return h-'a'+10;
+  return 0;
+}
+
+void
+urldecode(char *src)
+{
+  char c, *s, *d;
+
+  for (d=s=src; *s; s++, d++) {
+    c = *s;
+    if (c=='%') {
+      c = *++s;
+      if (c=='%')
+	c = '%';
+      else {
+	c = _char_htoi(c)<<4 | _char_htoi(*++s);
+      }
+      *d = c;
+    }
+    else {
+      *d = c;
+    }
+  }
+  *d = '\0';
+}
+
+#if 0
+static int
+is_ignoredword(const char *str)
+{
+  int i;
+
+  if (!prefs.ignoredwords)
+    return 0;
+
+  for (i=0; prefs.ignoredwords[i].n; i++) {
+    if (!(strncasecmp(prefs.ignoredwords[i].word, str, prefs.ignoredwords[i].n))) {
+      char next_char = str[prefs.ignoredwords[i].n];
+      if (isalnum(next_char))
+	continue;
+      return prefs.ignoredwords[i].n;
+    }
+  }
+  return 0;
+}
+#endif
+
+char *
+skipspaces(const char *str)
+{
+  while (isspace(*str)) str++;
+  return (char*) str;
+}
+
+/*
+U+0040 (40): @ A B C  D E F G  H I J K  L M N O
+U+0050 (50): P Q R S  T U V W  X Y Z [  \ ] ^ _
+U+0060 (60): ` a b c  d e f g  h i j k  l m n o
+U+0070 (70): p q r s  t u v w  x y z {  | } ~
+
+U+00c0 (c3 80):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+U+00d0 (c3 90):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+U+00e0 (c3 a0):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+U+00f0 (c3 b0):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+U+0100 (c4 80):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+U+0110 (c4 90):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+U+0120 (c4 a0):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+U+0130 (c4 b0):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+U+0140 (c5 80):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+U+0150 (c5 90):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+U+0160 (c5 a0):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+U+0170 (c5 b0):  �� �� �� ��  �� �� �� ��  �� �� �� ��  �� �� �� ��
+ */
+
+// conversion table for latin diacritical char to ascii one char or two chars.
+unsigned short UtoAscii[] = {
+  // U+00c0
+  0x0041,0x0041,0x0041,0x0041, 0x0041,0x0041,0x4145,0x0043, 0x0045,0x0045,0x0045,0x0045, 0x0049,0x0049,0x0049,0x0049,
+  0x0044,0x004e,0x004f,0x004f, 0x004f,0x004f,0x004f,0xc397, 0xc398,0x0055,0x0055,0x0055, 0x0055,0x0059,0x0050,0x5353,
+  // U+00e0
+  0x0041,0x0041,0x0041,0x0041, 0x0041,0x0041,0x4145,0x0043, 0x0045,0x0045,0x0045,0x0045, 0x0049,0x0049,0x0049,0x0049,
+  0x0044,0x004e,0x004f,0x004f, 0x004f,0x004f,0x004f,0xc397, 0xc398,0x0055,0x0055,0x0055, 0x0055,0x0059,0x0050,0x5353,
+  // U+0100
+  0x0041,0x0041,0x0041,0x0041, 0x0041,0x0041,0x0043,0x0043, 0x0043,0x0043,0x0043,0x0043, 0x0043,0x0043,0x0044,0x0044,
+  0x0044,0x0044,0x0045,0x0045, 0x0045,0x0045,0x0045,0x0045, 0x0045,0x0045,0x0045,0x0045, 0x0047,0x0047,0x0047,0x0047,
+  // U+0120
+  0x0047,0x0047,0x0047,0x0047, 0x0048,0x0048,0x0048,0x0048, 0x0049,0x0049,0x0049,0x0049, 0x0049,0x0049,0x0049,0x0049,
+  0x0049,0x0049,0x494a,0x494a, 0x004a,0x004a,0x004b,0x004b, 0x004b,0x004c,0x004c,0x004c, 0x004c,0x004c,0x004c,0x004c,
+  // U+0140
+  0x004c,0x004c,0x004c,0x004e, 0x004e,0x004e,0x004e,0x004e, 0x004e,0x004e,0x004e,0x004e, 0x004f,0x004f,0x004f,0x004f,
+  0x004f,0x004f,0x4f45,0x4f45, 0x0052,0x0052,0x0052,0x0052, 0x0052,0x0052,0x0053,0x0053, 0x0053,0x0053,0x0053,0x0053,
+  // U+0160
+  0x0053,0x0053,0x0054,0x0054, 0x0054,0x0054,0x0054,0x0054, 0x0055,0x0055,0x0055,0x0055, 0x0055,0x0055,0x0055,0x0055,
+  0x0055,0x0055,0x0055,0x0055, 0x0057,0x0057,0x0059,0x0059, 0x0059,0x005a,0x005a,0x005a, 0x005a,0x005a,0x005a,0xc5bf
+};
+
+// conversion table for toupper() function for latin diacritical char
+unsigned short UtoUpper[] = {
+  // U+00c0
+  0xc380,0xc381,0xc382,0xc383, 0xc384,0xc385,0xc386,0xc387, 0xc388,0xc389,0xc38a,0xc38b, 0xc38c,0xc38d,0xc38e,0xc38f,
+  0xc390,0xc391,0xc392,0xc393, 0xc394,0xc395,0xc396,0xc397, 0xc398,0xc399,0xc39a,0xc39b, 0xc39c,0xc39d,0xc39e,0x5353,
+  // U+00e0
+  0xc380,0xc381,0xc382,0xc383, 0xc384,0xc385,0xc386,0xc387, 0xc388,0xc389,0xc38a,0xc38b, 0xc38c,0xc38d,0xc38e,0xc38f,
+  0xc390,0xc391,0xc392,0xc393, 0xc394,0xc395,0xc396,0xc397, 0xc398,0xc399,0xc39a,0xc39b, 0xc39c,0xc39d,0xc39e,0xc39f,
+  // U+0100
+  0xc480,0xc480,0xc482,0xc482, 0xc484,0xc484,0xc486,0xc486, 0xc488,0xc488,0xc48a,0xc48a, 0xc48c,0xc48c,0xc48e,0xc48e,
+  0xc490,0xc490,0xc492,0xc492, 0xc494,0xc494,0xc496,0xc496, 0xc498,0xc498,0xc49a,0xc49a, 0xc49c,0xc49c,0xc49e,0xc49e,
+  // U+0120
+  0xc4a0,0xc4a0,0xc4a2,0xc4a2, 0xc4a4,0xc4a4,0xc4a6,0xc4a6, 0xc4a8,0xc4a8,0xc4aa,0xc4aa, 0xc4ac,0xc4ac,0xc4ae,0xc4ae,
+  0xc4b0,0xc4b0,0xc4b2,0xc4b2, 0xc4b4,0xc4b4,0xc4b6,0xc4b6, 0xc4b8,0xc4b9,0xc4b9,0xc4bb, 0xc4bb,0xc4bd,0xc4bd,0xc4bf,
+  // U+0140
+  0xc4bf,0xc581,0xc581,0xc583, 0xc583,0xc585,0xc585,0xc587, 0xc587,0xc589,0xc58a,0xc58a, 0xc58c,0xc58c,0xc58e,0xc58e,
+  0xc590,0xc591,0xc592,0xc593, 0xc594,0xc595,0xc596,0xc597, 0xc598,0xc599,0xc59a,0xc59b, 0xc59c,0xc59d,0xc59e,0xc59f,
+  // U+0160
+  0xc5a0,0xc5a0,0xc5a2,0xc5a2, 0xc5a4,0xc5a4,0xc5a6,0xc5a6, 0xc5a8,0xc5a8,0xc5aa,0xc5aa, 0xc5ac,0xc5ac,0xc5ae,0xc5ae,
+  0xc5b0,0xc5b1,0xc5b2,0xc5b3, 0xc5b4,0xc5b5,0xc5b6,0xc5b7, 0xc5b8,0xc5b9,0xc5b9,0xc5bb, 0xc5bc,0xc5bd,0xc5bd,0xc5bf,
+};
+
+
+int
+safe_atoi(char *s)
+{
+  if (!s)
+    return 0;
+  if ((s[0]>='0' && s[0]<='9') || s[0]=='-' || s[0]=='+')
+    return atoi(s);
+  return 0;
+}
+
+// NOTE: support U+0000 ~ U+FFFF only.
+int
+utf16le_to_utf8(char *dst, int n, __u16 utf16le)
+{
+  __u16 wc = le16_to_cpu(utf16le);
+  if (wc < 0x80) {
+    if (n<1) return 0;
+    *dst++ = wc & 0xff;
+    return 1;
+  }
+  else if (wc < 0x800) {
+    if (n<2) return 0;
+    *dst++ = 0xc0 | (wc>>6);
+    *dst++ = 0x80 | (wc & 0x3f);
+    return 2;
+  }
+  else {
+    if (n<3) return 0;
+    *dst++ = 0xe0 | (wc>>12);
+    *dst++ = 0x80 | ((wc>>6) & 0x3f);
+    *dst++ = 0x80 | (wc & 0x3f);
+    return 3;
+  }
+}
+
+void
+fetch_string_txt(char *fname, char *lang, int n, ...)
+{
+  va_list args;
+  char **keys;
+  char ***strs;
+  char **defstr;
+  int i;
+  FILE *fp;
+  char buf[4096];
+  int state;
+  char *p;
+  char *langid;
+  const char *lang_en = "EN";
+
+  if (!(keys = malloc(sizeof(keys) * n))) {
+    DPRINTF(E_FATAL, L_SCANNER, "Out of memory\n");
+  }
+  if (!(strs = malloc(sizeof(strs) * n))) {
+    DPRINTF(E_FATAL, L_SCANNER, "Out of memory\n");
+  }
+  if (!(defstr = malloc(sizeof(defstr) * n))) {
+    DPRINTF(E_FATAL, L_SCANNER, "Out of memory\n");
+  }
+
+  va_start(args, n);
+  for (i=0; i<n; i++) {
+    keys[i] = va_arg(args, char *);
+    strs[i] = va_arg(args, char **);
+    defstr[i] = va_arg(args, char *);
+  }
+  va_end(args);
+
+  if (!(fp = fopen(fname, "rb"))) {
+    DPRINTF(E_ERROR, L_SCANNER, "Cannot open <%s>\n", fname);
+    goto _exit;
+  }
+
+  state = -1;
+  while (fgets(buf, sizeof(buf), fp)) {
+    int len = strlen(buf);
+
+    if (buf[len-1]=='\n') buf[len-1] = '\0';
+
+    if (state<0) {
+      if (isalpha(buf[0])) {
+	for (i=0; i<n; i++) {
+	  if (!(strcmp(keys[i], buf))) {
+	    state = i;
+	    break;
+	  }
+	}
+      }
+    }
+    else {
+      int found = 0;
+
+      if (isalpha(buf[0]) || buf[0]=='\0') {
+	state = -1;
+	continue;
+      }
+
+      p = buf;
+      while (isspace(*p)) p++;
+      if (*p == '\0') {
+	state = -1;
+	continue;
+      }
+      langid = p;
+      while (!isspace(*p)) p++;
+      *p++ = '\0';
+
+      if (!strcmp(lang, langid))
+	found = 1;
+      else if (strcmp(lang_en, langid))
+	continue;
+
+      while (isspace(*p)) p++;
+      if (*strs[state])
+	free(*strs[state]);
+      *strs[state] = strdup(p);
+
+      if (found)
+	state = -1;
+    }
+  }
+
+  for (i=0; i<n; i++) {
+    if (!*strs[i])
+      *strs[i] = defstr[i];
+  }
+
+ _exit:
+  free(keys);
+  free(strs);
+  free(defstr);
+}

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