use sqlite to save index, major thread pool refactor

scripts/before_build.sh

@@ -1,10 +1,13 @@
 #!/usr/bin/env bash
 
-rm -rf index.sist2/
+(
+  cd ..
+  rm -rf index.sist2
 
-python3 scripts/mime.py > src/parsing/mime_generated.c
-python3 scripts/serve_static.py > src/web/static_generated.c
-python3 scripts/index_static.py > src/index/static_generated.c
-python3 scripts/magic_static.py > src/magic_generated.c
+  python3 scripts/mime.py > src/parsing/mime_generated.c
+  python3 scripts/serve_static.py > src/web/static_generated.c
+  python3 scripts/index_static.py > src/index/static_generated.c
+  python3 scripts/magic_static.py > src/magic_generated.c
 
-printf "static const char *const Sist2CommitHash = \"%s\";\n" $(git rev-parse HEAD) > src/git_hash.h
+  printf "static const char *const Sist2CommitHash = \"%s\";\n" $(git rev-parse HEAD) > src/git_hash.h
+)

scripts/mime.csv

@@ -29,7 +29,7 @@ application/mime, aps
 application/mspowerpoint, ppz
 application/msword, doc|dot|w6w|wiz|word
 application/netmc, mcp
-application/octet-stream, bin|dump|gpg
+application/octet-stream, bin|dump|gpg|pack|idx
 application/oda, oda
 application/ogg, ogv
 application/pdf, pdf
@@ -243,7 +243,7 @@ audio/make, funk|my|pfunk
 audio/midi, kar
 audio/mid, rmi
 audio/mp4, m4b
-audio/mpeg, m2a|mpa
+audio/mpeg, m2a|mpa|mpga
 audio/ogg, ogg
 audio/s3m, s3m
 audio/tsp-audio, tsi
@@ -382,7 +382,7 @@ text/x-pascal, p
 text/x-perl, pl
 text/x-php, php
 text/x-po, po
-text/x-python, py
+text/x-python, py|pyi
 text/x-ruby, rb
 text/x-sass, sass
 text/x-scss, scss

scripts/mime.py

@@ -1,3 +1,5 @@
+import zlib
+
 mimes = {}
 noparse = set()
 ext_in_hash = set()
@@ -135,24 +137,40 @@ def clean(t):
     return t.replace("/", "_").replace(".", "_").replace("+", "_").replace("-", "_")
 
 
+def crc(s):
+    return zlib.crc32(s.encode()) & 0xffffffff
+
+
 with open("scripts/mime.csv") as f:
     for l in f:
         mime, ext_list = l.split(",")
         if l.startswith("!"):
             mime = mime[1:]
             noparse.add(mime)
-        ext = [x.strip() for x in ext_list.split("|")]
+        ext = [x.strip() for x in ext_list.split("|") if x.strip() != ""]
         mimes[mime] = ext
 
+    seen_crc = set()
+    for ext in mimes.values():
+        for e in ext:
+            if crc(e) in seen_crc:
+                raise Exception("CRC32 collision")
+            seen_crc.add(crc(e))
+
+    seen_crc = set()
+    for mime in mimes.keys():
+        if crc(mime) in seen_crc:
+            raise Exception("CRC32 collision")
+        seen_crc.add(crc(mime))
+
     print("// **Generated by mime.py**")
     print("#ifndef MIME_GENERATED_C")
     print("#define MIME_GENERATED_C")
-    print("#include <glib.h>\n")
     print("#include <stdlib.h>\n")
     # Enum
     print("enum mime {")
     for mime, ext in sorted(mimes.items()):
-        print("    " + clean(mime) + "=" + mime_id(mime) + ",")
+        print(f"{clean(mime)}={mime_id(mime)},")
     print("};")
 
     # Enum -> string
@@ -163,20 +181,20 @@ with open("scripts/mime.csv") as f:
     print("default: return NULL;}}")
 
     # Ext -> Enum
-    print("GHashTable *mime_get_ext_table() {"
-          "GHashTable *ext_table = g_hash_table_new(g_str_hash, g_str_equal);")
+    print("unsigned int mime_extension_lookup(unsigned long extension_crc32) {"
+          "switch (extension_crc32) {")
     for mime, ext in mimes.items():
-        for e in [e for e in ext if e]:
-            print("g_hash_table_insert(ext_table, \"" + e + "\", (gpointer)" + clean(mime) + ");")
-            if e in ext_in_hash:
-                raise Exception("extension already in hash: " + e)
-            ext_in_hash.add(e)
-    print("return ext_table;}")
+        if len(ext) > 0:
+            for e in ext:
+                print(f"case {crc(e)}:", end="")
+            print(f"return {clean(mime)};")
+    print("default: return 0;}}")
 
     # string -> Enum
-    print("GHashTable *mime_get_mime_table() {"
-          "GHashTable *mime_table = g_hash_table_new(g_str_hash, g_str_equal);")
-    for mime, ext in mimes.items():
-        print("g_hash_table_insert(mime_table, \"" + mime + "\", (gpointer)" + clean(mime) + ");")
-    print("return mime_table;}")
+    print("unsigned int mime_name_lookup(unsigned long mime_crc32) {"
+          "switch (mime_crc32) {")
+    for mime in mimes.keys():
+        print(f"case {crc(mime)}: return {clean(mime)};")
+
+    print("default: return 0;}}")
     print("#endif")