/usr/include/poppler/UTF8.h is in libpoppler-dev 0.18.4-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// UTF8.h
//
// Copyright 2001-2003 Glyph & Cog, LLC
//
//========================================================================
//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2008 Koji Otani <sho@bbr.jp>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
static int mapUTF8(Unicode u, char *buf, int bufSize) {
if (u <= 0x0000007f) {
if (bufSize < 1) {
return 0;
}
buf[0] = (char)u;
return 1;
} else if (u <= 0x000007ff) {
if (bufSize < 2) {
return 0;
}
buf[0] = (char)(0xc0 + (u >> 6));
buf[1] = (char)(0x80 + (u & 0x3f));
return 2;
} else if (u <= 0x0000ffff) {
if (bufSize < 3) {
return 0;
}
buf[0] = (char)(0xe0 + (u >> 12));
buf[1] = (char)(0x80 + ((u >> 6) & 0x3f));
buf[2] = (char)(0x80 + (u & 0x3f));
return 3;
} else if (u <= 0x0010ffff) {
if (bufSize < 4) {
return 0;
}
buf[0] = (char)(0xf0 + (u >> 18));
buf[1] = (char)(0x80 + ((u >> 12) & 0x3f));
buf[2] = (char)(0x80 + ((u >> 6) & 0x3f));
buf[3] = (char)(0x80 + (u & 0x3f));
return 4;
} else {
return 0;
}
}
static int mapUCS2(Unicode u, char *buf, int bufSize) {
if (u <= 0xffff) {
if (bufSize < 2) {
return 0;
}
buf[0] = (char)((u >> 8) & 0xff);
buf[1] = (char)(u & 0xff);
return 2;
} else if (u < 0x110000) {
Unicode uu;
/* using surrogate pair */
if (bufSize < 4) {
return 0;
}
uu = ((u - 0x10000) >> 10) + 0xd800;
buf[0] = (char)((uu >> 8) & 0xff);
buf[1] = (char)(uu & 0xff);
uu = (u & 0x3ff)+0xdc00;
buf[2] = (char)((uu >> 8) & 0xff);
buf[3] = (char)(uu & 0xff);
return 4;
} else {
return 0;
}
}
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