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1 files changed, 21 insertions, 0 deletions

diff --git a/src/js/extract_lsp.js b/src/js/extract_lsp.js
new file mode 100644
index 0000000..6f53ebc
--- /dev/null
+++ b/src/js/extract_lsp.js
@@ -0,0 +1,21 @@
+// writes src/js/lsp.json: the language server's image (build/lsp/genome.h, made by
+// src/tools/mklsp.sh) and the map it was built for, read from build/lsp/map/memmap.h.
+// the vm needs the layout, because the server's map is not the compiler's.
+const fs = require('fs');
+const path = require('path');
+
+const root = path.join(__dirname, '..', '..');
+const genome = fs.readFileSync(path.join(root, 'build', 'lsp', 'genome.h'), 'utf8');
+
+const { mapValues } = require('./mapvalues.js');
+const layout = mapValues(path.join(root, 'build', 'lsp', 'map', 'memmap.h'), ['GORG', 'DS0', 'DSLIM', 'RS0', 'RSLIM', 'SYSGATE', 'ZFP', 'HEAP_LO', 'HEAP_HI']);
+
+const gorg = parseInt(genome.match(/#define\s+GORG\s+(\d+)/)[1], 10);
+const glen = parseInt(genome.match(/#define\s+GLEN\s+(\d+)/)[1], 10);
+const arr = genome.match(/genome\[\]\s*=\s*\{([\s\S]*?)\};/);
+const words = arr[1].split(',').map(s => s.trim()).filter(s => s.length > 0);
+if (words.length !== glen) throw new Error('genome has ' + words.length + ' words, GLEN says ' + glen);
+if (gorg !== layout.GORG) throw new Error('genome GORG ' + gorg + ' is not the map GORG ' + layout.GORG);
+
+fs.writeFileSync(path.join(__dirname, 'lsp.json'), JSON.stringify({ gorg, glen, layout, words }));
+console.log('wrote src/js/lsp.json: genome ' + glen + ' words at ' + gorg + ', heap ' + layout.HEAP_LO + '..' + layout.HEAP_HI);