This file is indexed.

/usr/include/colib/nustring.h is in libiulib-dev 0.4+is+0.3-3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
// -*- C++ -*-

// Copyright 2006 Deutsches Forschungszentrum fuer Kuenstliche Intelligenz 
// or its licensors, as applicable.
// 
// You may not use this file except under the terms of the accompanying license.
// 
// Licensed under the Apache License, Version 2.0 (the "License"); you
// may not use this file except in compliance with the License. You may
// obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// 
// Project: 
// File: 
// Purpose: 
// Responsible: tmb
// Reviewer: 
// Primary Repository: 
// Web Sites: www.iupr.org, www.dfki.de, www.ocropus.org

/// \file nustring.h
/// \brief Unicode strings.

#ifndef nustring_h__
#define nustring_h__

#include <stdlib.h>
#include <string.h>
#include "colib/narray.h"


// Normalized Unicode characters.  These are 32bit code points, but only a subset
// of those defined by Unicode are permitted.  Roughly, only codepoints corresponding
// to actual glyphs are permitted; no combining characters, no control characters other than
// whitespace, etc.
//
// FIXME add checks to exclude oddball character

namespace colib {
    struct nuchar {
        int value;
        nuchar() {
            value = 0;
        }
        nuchar(const nuchar &c) {
            value = c.value;
        }
        explicit nuchar(int x) {
            value = x;
        }
        int ord() {
            return value;
        }
        bool operator==(const nuchar &c) {
            return value==c.value;
        }
        bool operator!=(const nuchar &c) {
            return value!=c.value;
        }

    };

    // Normalized Unicode string.  This is a UTF-32 string with no control character
    // other than whitespace (newline, etc.), combining characters, changes in writing
    // direction, etc.
    //
    // FIXME add checks to exclude oddball character

    namespace {
        static int encode_nuchar(narray<char> &utf8, nuchar c) {
            if(c.value < 0) {
                return -1;
            } if(c.value < 0x80) {
                utf8.push(c.value);
                return 1;
            } else if(c.value < 0x800) {
                utf8.push(0xC0 | ((c.value >> 6) & 0x1F));
                utf8.push(0x80 | (c.value & 0x3F));
                return 2;
            } else if(c.value < 0x10000) {
                utf8.push(0xE0 | ((c.value >> 12) & 0xF));
                utf8.push(0x80 | ((c.value >> 6) & 0x3F));
                utf8.push(0x80 | (c.value & 0x3F));
                return 3;
            } else if(c.value < 0x110000) {
                utf8.push(0xF0 | ((c.value >> 18) & 7));
                utf8.push(0x80 | ((c.value >> 12) & 0x3F));
                utf8.push(0x80 | ((c.value >> 6) & 0x3F));
                utf8.push(0x80 | (c.value & 0x3F));
                return 4;
            } else {
                return -1;
            }
        }

        static int nustring_length(unsigned char a) {
            if(a < 128)
                return 1;
            int i;
            for(i = 0; i < 8; i++) {
                if(!((a << i) & 0x80))
                    break;
            }
            return i;
        }

        static bool decode_nuchar(nuchar &c, int &offset, const char *utf8,int n) {
            unsigned char a = utf8[offset];
            int length = nustring_length(a);
            if(offset + length > n || length < 1 || length > 4)
                return false;
            if(a < 128) {
                if(length!=1) throw "bad encoding";
                c = nuchar(a);
                offset += length;
                return true;
            }
            int result = (0x7F >> length) & a;
            if(a >> 6 != 3)
                return false;
            for(int i = 1; i < length; i++) {
                a = utf8[offset + i];
                if(a >> 6 != 2)
                    return false;
                result <<= 6;
                result |= a & 0x3F;
            }
            c = nuchar(result);
            offset += length;
            return true;
        }
    }

    class nustring : public narray<nuchar> {
    public:
        nustring() {
        }
        nustring(int n):narray<nuchar>(n) {
        }
        nustring(const char *s) {
            utf8Decode(s,strlen(s));
        }
        void of(narray<int> &data) {
            resize(data.length());
            for(int i=0;i<data.length();i++) at(i) = nuchar(data[i]);
        }
        void as(narray<int> &data) {
            data.resize(length());
            for(int i=0;i<length();i++) data[i] = at(i).ord();
        }
        int utf8Length() {
            narray<char> temp;
            utf8Encode(temp);
            return temp.length();
        }
        void utf8Encode(narray<char> &s) {
            s.clear();
            for(int i=0;i<length();i++) {
                int l = encode_nuchar(s,at(i));
                if(l<0) throw "bad nustring";
            }
        }
        void utf8Decode(const char *s,int n) {
            if(n<0) n = strlen(s);
            int offset = 0;
            nuchar c;
            clear();
            while(offset < n && decode_nuchar(c,offset,s,n)) {
                push(c);
            }
            if(offset<n) throw "bad utf8 encoding";
        }
        void utf8Decode(narray<char> &str) {
            utf8Decode(&str[0],str.length());
        }
        void utf8Encode(char *result,int size) {
            narray<char> temp;
            utf8Encode(temp);
            if(temp.length()>=size) throw "not enough room";
            strncpy(result,&temp[0],temp.length());
            result[temp.length()] = 0;
        }
        char *mallocUtf8Encode() {
            narray<char> temp;
            utf8Encode(temp);
            int size = temp.length();
            char *result = (char *)malloc(size+1);
            if(size>0) strncpy(result,&temp[0],size);
            result[size] = 0;
            return result;
        }
        char *newUtf8Encode() {
            narray<char> temp;
            utf8Encode(temp);
            int size = temp.length();
            char *result = new char[size+1];
            if(size>0) strncpy(result,&temp[0],size);
            result[size] = 0;
            return result;
        }

    };

    // convenience functions for intarrays

    inline void utf8_decode(intarray &result,const char *s,int n=-1) {
        if(n<0) n = strlen(s);
        int offset = 0;
        nuchar c;
        result.clear();
        while(decode_nuchar(c,offset,s,n))
            result.push(c.value);
        if(offset<n) throw "bad utf8 encoding";
    }

    inline void utf8_encode(narray<char> &s,intarray &a) {
        s.clear();
        for(int i=0;i<a.length();i++) {
            int l = encode_nuchar(s,nuchar(a(i)));
            if(l<0) throw "bad nustring";
        }
    }

    inline void utf8_encode(bytearray &s,intarray &a) {
        narray<char> temp;
        utf8_encode(temp,a);
        copy(s,temp);
    }

    inline const char *malloc_utf8_encode(intarray &data) {
        narray<char> temp;
        utf8_encode(temp,data);
        int size = temp.length();
        char *result = (char *)malloc(size+1);
        if(size>0) strncpy(result,&temp[0],size);
        result[size] = 0;
        return result;
    }
} 

#endif /* nustring_h__ */