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#include "transcode_data.h"
<%
require "gb18030-tbl"
def linear(code)
bytes = [code].pack('H8').unpack 'C4'
((bytes[0]*10+bytes[1])*126+bytes[2])*10+bytes[3]
end
def calculate_differences_gb_utf(table)
table.collect do |code|
code = code.dup
if code[0].length == 4
if code[1] < 0x800 # GB-18030: 2 bytes, UTF-8: 2 bytes
# do nothing
else # GB-18030: 2 bytes, UTF-8: 3 bytes
gb_linear2b = code[0].to_i(16)
diff2b = gb_linear2b - code[1] + 24055
code[1] = "funsio(#{diff2b})"
end
else
if code[1] < 0x800 # GB-18030: 4 bytes, UTF-8: 2 bytes
# do nothing
else # GB-18030: 4 bytes, UTF-8: 3 bytes
gb_linear4b = linear(code[0])
diff4b = gb_linear4b - code[1] - 0x170000
code[1] = "funsio(#{diff4b})"
end
end
code
end
end
def calculate_differences_utf_gb(table)
table_rev = table.map{|a,b| [b,a]}
table_rev.collect do |code|
code = code.dup
if code[0] >= 0x800
if code[1].length == 4 #GB18030 2byte UTF-8 3byte
gb_linear2b = code[1].to_i(16)
diff2b = gb_linear2b - code[0] + 24055
code[1] = "funsio(#{diff2b})"
else # GB-18030: 4 bytes, UTF-8: 3 bytes
gb_linear4b = linear(code[1])
diff4b = gb_linear4b - code[0] - 0x170000
code[1] = "funsio(#{diff4b})"
end
end
code
end
end
transcode_tbl_only "GB18030", "UTF-8", [["{00-7f}", :nomap]] +
calculate_differences_gb_utf(GB18030_TO_UCS_TBL) + [
["{90-e2}{30-39}{81-fe}{30-39}", :func_so],
["e3{30-31}{81-fe}{30-39}", :func_so],
["e332{81-99}{30-39}", :func_so],
["e3329a{30-35}", :func_so], # "E3329A35" is U+10FFFF
]
transcode_tbl_only "UTF-8", "GB18030", [["{00-7f}", :nomap]] +
calculate_differences_utf_gb(GB18030_TO_UCS_TBL) + [
["f0{90-bf}{80-bf}{80-bf}", :func_so],
["{f1-f3}{80-bf}{80-bf}{80-bf}", :func_so],
["f4{80-8f}{80-bf}{80-bf}", :func_so]
]
%>
<%= transcode_generated_code %>
/* GB18030 4byte, UTF-8 4byte*/
static ssize_t
fun_so_from_gb18030(void *statep, const unsigned char *s, size_t l, unsigned char *o, size_t osize)
{
/* outside BMP only */
/* u: Unicode Scalar Value */
unsigned int u = (s[0]-0x90)*10*126*10 + (s[1]-0x30)*126*10 + (s[2]-0x81)*10 + (s[3]-0x30) + 0x10000;
o[0] = 0xF0 | (u>>18);
o[1] = 0x80 | ((u>>12)&0x3F);
o[2] = 0x80 | ((u>>6)&0x3F);
o[3] = 0x80 | (u&0x3F);
return 4;
}
/* GB18030 4byte, UTF-8 4byte*/
static ssize_t
fun_so_to_gb18030(void *statep, const unsigned char *s, size_t l, unsigned char *o, size_t osize)
{
/* outside BMP only */
/* u: Unicode Scalar Value */
unsigned int u = ((s[0]&0x07)<<18) | ((s[1]&0x3F)<<12) | ((s[2]&0x3F)<<6) | (s[3]&0x3F);
u -= 0x10000;
o[3] = 0x30 + u%10;
u /= 10;
o[2] = 0x81 + u%126;
u /= 126;
o[1] = 0x30 + u%10;
o[0] = 0x90 + u/10;
return 4;
}
/* GB18030 2byte, UTF-8 3byte and GB18030 4byte, UTF-8 3byte*/
static ssize_t
fun_sio_from_gb18030(void *statep, const unsigned char *s, size_t l, VALUE info, unsigned char *o, size_t osize)
{
unsigned int diff = (unsigned int)(info >> 8);
unsigned int u; /* Unicode Scalar Value */
if (diff & 0x20000) { /* GB18030 4 bytes */
u = ((s[0]*10+s[1])*126+s[2])*10+s[3] - diff - 0x170000;
}
else { /* GB18030 2 bytes */
u = s[0]*256 + s[1] + 24055 - diff;
}
o[0] = 0xE0 | (u>>12);
o[1] = 0x80 | ((u>>6)&0x3F);
o[2] = 0x80 | (u&0x3F);
return 3;
}
/* GB18030 2byte, UTF-8 3byte and GB18030 4byte, UTF-8 3byte*/
static ssize_t
fun_sio_to_gb18030(void *statep, const unsigned char *s, size_t l, VALUE info, unsigned char *o, size_t osize)
{
unsigned int diff = (unsigned int)(info >> 8);
unsigned int u; /* Unicode Scalar Value */
u = ((s[0]&0x0F)<<12) | ((s[1]&0x3F)<<6) | (s[2]&0x3F);
if (diff & 0x20000) { /* GB18030 4 bytes */
u += (diff + 0x170000);
u -= 1688980;
u += 0x2;
o[3] = 0x30 + u%10;
u /= 10;
u += 0x32;
o[2] = 0x81 + u%126;
u /= 126;
u += 0x1;
o[1] = 0x30 + u%10;
u /= 10;
o[0] = 0x81 + u;
return 4;
}
else { /* GB18030 2 bytes */
u += (diff - 24055);
o[1] = u%256;
o[0] = u/256;
return 2;
}
}
static const rb_transcoder
rb_from_GB18030 = {
"GB18030", "UTF-8", from_GB18030,
TRANSCODE_TABLE_INFO,
1, /* input_unit_length */
4, /* max_input */
4, /* max_output */
asciicompat_converter, /* asciicompat_type */
0, NULL, NULL, /* state_size, state_init, state_fini */
NULL, NULL, NULL, fun_so_from_gb18030,
NULL, NULL, NULL, fun_sio_from_gb18030
};
static const rb_transcoder
rb_to_GB18030 = {
"UTF-8", "GB18030", to_GB18030,
TRANSCODE_TABLE_INFO,
1, /* input_unit_length */
4, /* max_input */
4, /* max_output */
asciicompat_converter, /* asciicompat_type */
0, NULL, NULL, /* state_size, state_init, state_fini */
NULL, NULL, NULL, fun_so_to_gb18030,
NULL, NULL, NULL, fun_sio_to_gb18030
};
TRANS_INIT(gb18030)
{
rb_register_transcoder(&rb_from_GB18030);
rb_register_transcoder(&rb_to_GB18030);
}
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