diff options
Diffstat (limited to 'ruby_1_9_3/enc/trans/gb18030.trans')
| -rw-r--r-- | ruby_1_9_3/enc/trans/gb18030.trans | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/ruby_1_9_3/enc/trans/gb18030.trans b/ruby_1_9_3/enc/trans/gb18030.trans new file mode 100644 index 0000000000..c7da4c64b4 --- /dev/null +++ b/ruby_1_9_3/enc/trans/gb18030.trans @@ -0,0 +1,184 @@ +#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 +}; + + +void +Init_gb18030(void) +{ + rb_register_transcoder(&rb_from_GB18030); + rb_register_transcoder(&rb_to_GB18030); +} |