mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-12-26 23:17:25 +01:00
79 lines
No EOL
3.3 KiB
Text
79 lines
No EOL
3.3 KiB
Text
// initialization
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// in old versions of GMS, you'd have this ran separately instead.
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// in GMS2 it'd need to be @"..." instead of just "..."
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gml_pragma("global", @"
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global.g_json_minify_fb = buffer_create(1024, buffer_fast, 1);
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global.g_json_minify_rb = buffer_create(1024, buffer_grow, 1);
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");
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function json_minify(src) {
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var rb = global.g_json_minify_rb; // copy text to string buffer:
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buffer_seek(rb, buffer_seek_start, 0);
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buffer_write(rb, buffer_string, src);
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var size = buffer_tell(rb) - 1;
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var fb = global.g_json_minify_fb; // then copy it to "fast" input buffer for peeking:
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if (buffer_get_size(fb) < size) buffer_resize(fb, size);
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buffer_copy(rb, 0, size, fb, 0);
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var rbpos = 0; // writing position in output buffer
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var start = 0; // start offset in input buffer
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var pos = 0; // reading position in input buffer
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var next; // number of bytes to be copied
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while (pos < size) {
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var c = buffer_peek(fb, pos++, buffer_u8);
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switch (c) {
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case 9: case 10: case 13: case 32: // `\t\n\r `
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next = pos - 1 - start; // flush:
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buffer_copy(fb, start, next, rb, rbpos);
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rbpos += next;
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while (pos < size) { // skip over trailing whitespace:
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switch (buffer_peek(fb, pos, buffer_u8)) {
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case 9: case 10: case 13: case 32: pos += 1; continue;
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// default -> break
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} break;
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}
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start = pos;
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break;
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case 34: // `"`
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while (pos < size) {
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switch (buffer_peek(fb, pos++, buffer_u8)) {
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case 92: pos++; continue; // `\"`
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case 34: break; // `"` -> break
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default: continue; // else
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} break;
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}
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break;
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default:
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if (c >= ord("0") && c <= ord("9")) { // `0`..`9`
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var pre = true; // whether reading pre-dot or not
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var till = pos - 1; // index at which meaningful part of the number ends
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while (pos < size) {
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c = buffer_peek(fb, pos, buffer_u8);
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if (c == ord(".")) {
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pre = false; // whether reading pre-dot or not
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pos += 1; // index at which meaningful part of the number ends
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} else if (c >= ord("0") && c <= ord("9")) { // write all pre-dot, and till the last non-zero after dot:
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if (pre || c != ord("0")) till = pos;
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pos += 1;
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} else break;
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}
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if (till < pos) { // flush if number can be shortened
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next = till + 1 - start;
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buffer_copy(fb, start, next, rb, rbpos);
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rbpos += next;
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start = pos;
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}
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}
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} // switch (c)
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} // while (pos < size)
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if (start == 0) return src; // source string was unchanged
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if (start < pos) { // flush if there's more data left
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next = pos - start;
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buffer_copy(fb, start, next, rb, rbpos);
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rbpos += next;
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}
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buffer_poke(rb, rbpos, buffer_u8, 0); // terminating byte
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buffer_seek(rb, buffer_seek_start, 0);
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return buffer_read(rb, buffer_string);
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} |