diff options
Diffstat (limited to 'xpdf/UTF8.cc')
| -rw-r--r-- | xpdf/UTF8.cc | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/xpdf/UTF8.cc b/xpdf/UTF8.cc new file mode 100644 index 0000000..9ee0142 --- /dev/null +++ b/xpdf/UTF8.cc @@ -0,0 +1,183 @@ +//======================================================================== +// +// UTF8.cc +// +// Copyright 2001-2017 Glyph & Cog, LLC +// +//======================================================================== + +#include <aconf.h> +#include "UTF8.h" + +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; + } +} + +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 { + return 0; + } +} + +GBool getUTF8(GString *s, int *i, Unicode *u) { + Guchar c0, c1, c2, c3, c4, c5; + + if (*i >= s->getLength()) { + return gFalse; + } + c0 = (Guchar)s->getChar((*i)++); + if (c0 < 0x80) { + *u = (Unicode)c0; + } else if (c0 < 0xe0) { + if (*i < s->getLength() && + ((c1 = (Guchar)s->getChar(*i)) & 0xc0) == 0x80) { + *i += 1; + *u = (Unicode)(((c0 & 0x1f) << 6) | + (c1 & 0x3f)); + } else { + *u = (Unicode)c0; + } + } else if (c0 < 0xf0) { + if (*i < s->getLength() - 1 && + ((c1 = (Guchar)s->getChar(*i)) & 0xc0) == 0x80 && + ((c2 = (Guchar)s->getChar(*i + 1)) & 0xc0) == 0x80) { + *i += 2; + *u = (Unicode)(((c0 & 0x0f) << 12) | + ((c1 & 0x3f) << 6) | + (c2 & 0x3f)); + } else { + *u = (Unicode)c0; + } + } else if (c0 < 0xf8) { + if (*i < s->getLength() - 2 && + ((c1 = (Guchar)s->getChar(*i)) & 0xc0) == 0x80 && + ((c2 = (Guchar)s->getChar(*i + 1)) & 0xc0) == 0x80 && + ((c3 = (Guchar)s->getChar(*i + 2)) & 0xc0) == 0x80) { + *i += 3; + *u = (Unicode)(((c0 & 0x07) << 18) | + ((c1 & 0x3f) << 12) | + ((c2 & 0x3f) << 6) | + (c3 & 0x3f)); + } else { + *u = (Unicode)c0; + } + } else if (c0 < 0xfc) { + if (*i < s->getLength() - 3 && + ((c1 = (Guchar)s->getChar(*i)) & 0xc0) == 0x80 && + ((c2 = (Guchar)s->getChar(*i + 1)) & 0xc0) == 0x80 && + ((c3 = (Guchar)s->getChar(*i + 2)) & 0xc0) == 0x80 && + ((c4 = (Guchar)s->getChar(*i + 3)) & 0xc0) == 0x80) { + *i += 4; + *u = (Unicode)(((c0 & 0x03) << 24) | + ((c1 & 0x3f) << 18) | + ((c2 & 0x3f) << 12) | + ((c3 & 0x3f) << 6) | + (c4 & 0x3f)); + } else { + *u = (Unicode)c0; + } + } else if (c0 < 0xfe) { + if (*i < s->getLength() - 4 && + ((c1 = (Guchar)s->getChar(*i)) & 0xc0) == 0x80 && + ((c2 = (Guchar)s->getChar(*i + 1)) & 0xc0) == 0x80 && + ((c3 = (Guchar)s->getChar(*i + 2)) & 0xc0) == 0x80 && + ((c4 = (Guchar)s->getChar(*i + 3)) & 0xc0) == 0x80 && + ((c5 = (Guchar)s->getChar(*i + 4)) & 0xc0) == 0x80) { + *i += 5; + *u = (Unicode)(((c0 & 0x01) << 30) | + ((c1 & 0x3f) << 24) | + ((c2 & 0x3f) << 18) | + ((c3 & 0x3f) << 12) | + ((c4 & 0x3f) << 6) | + (c5 & 0x3f)); + } else { + *u = (Unicode)c0; + } + } else { + *u = (Unicode)c0; + } + return gTrue; +} + +GBool getUTF16BE(GString *s, int *i, Unicode *u) { + int w0, w1; + + if (*i >= s->getLength() - 1) { + return gFalse; + } + w0 = ((s->getChar(*i) & 0xff) << 8) | (s->getChar(*i + 1) & 0xff); + *i += 2; + if (w0 < 0xd800 || w0 >= 0xe000) { + *u = (Unicode)w0; + } else { + if (*i < s->getLength() - 1) { + w1 = ((s->getChar(*i) & 0xff) << 8) | (s->getChar(*i + 1) & 0xff); + *i += 2; + *u = 0x10000 + ((w0 - 0xd800) << 10) + (w1 - 0xdc00); + } else { + *u = (Unicode)w0; + } + } + return gTrue; +} + +GBool getUTF16LE(GString *s, int *i, Unicode *u) { + int w0, w1; + + if (*i >= s->getLength() - 1) { + return gFalse; + } + w0 = (s->getChar(*i) & 0xff) | ((s->getChar(*i + 1) & 0xff) << 8); + *i += 2; + if (w0 < 0xd800 || w0 >= 0xe000) { + *u = (Unicode)w0; + } else { + if (*i < s->getLength() - 1) { + w1 = (s->getChar(*i) & 0xff) | ((s->getChar(*i + 1) & 0xff) << 8); + *i += 2; + *u = 0x10000 + ((w0 - 0xd800) << 10) + (w1 - 0xdc00); + } else { + *u = (Unicode)w0; + } + } + return gTrue; +} |