Mercurial > repos > tabletprog
diff cbackend.js @ 288:a4c2b31acba7
Add utf8 method to integer types for converting a number into a utf8 string made up of the corresponding character code
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Tue, 22 Jul 2014 21:31:41 -0700 |
| parents | ddf38b66b2e2 |
| children | befaefdfcd8a |
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--- a/cbackend.js Tue Jul 22 18:39:00 2014 -0700 +++ b/cbackend.js Tue Jul 22 21:31:41 2014 -0700 @@ -760,6 +760,42 @@ 'return &(str->header);' ] }); + intObj.addMessage('utf8', { + vars: {str: 'string *', norm: 'uint32_t'}, + lines: [ + 'str = (string *)make_object(&string_meta, NULL, 0);', + 'str->len = 1;', + 'norm = self->num;', + 'if (norm < 0x80) {', + ' str->bytes = 1;', + ' str->data = GC_MALLOC(2);', + ' str->data[0] = norm;', + '} else if(norm < 0x800) {', + ' str->bytes = 2;', + ' str->data = GC_MALLOC(3);', + ' str->data[0] = 0xC0 | norm >> 6;', + ' str->data[1] = 0x80 | (norm & 0x3F);', + '} else if(norm < 0x10000) {', + ' str->bytes = 3;', + ' str->data = GC_MALLOC(4);', + ' str->data[0] = 0xE0 | norm >> 12;', + ' str->data[1] = 0x80 | ((norm >> 6) & 0x3F);', + ' str->data[2] = 0x80 | (norm & 0x3F);', + '} else if(norm < 0x10FFFF) {', + ' str->bytes = 4;', + ' str->data = GC_MALLOC(5);', + ' str->data[0] = 0xF0 | norm >> 18;', + ' str->data[1] = 0x80 | ((norm >> 12) & 0x3F);', + ' str->data[2] = 0x80 | ((norm >> 6) & 0x3F);', + ' str->data[3] = 0x80 | (norm & 0x3F);', + '} else {', + ' str->len = str->bytes = 0;', + ' str->data = GC_MALLOC(1);', + '}', + 'str->data[str->bytes] = 0;', + 'return &(str->header);' + ] + }); //7FFFFFFFFFFFFFFF //01234567890123456789 intObj.addMessage('hex', {