Remove dependency on ragel command

net/http/uricspn.c

@@ -0,0 +1,185 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/assert.h"
+#include "libc/nexgen32e/x86feature.h"
+#include "libc/sysv/errfuns.h"
+#include "net/http/uri.h"
+
+/*
+ * GENERATED BY
+ *
+ *     ragel -o net/http/uricspn.c net/http/uricspn.rl
+ *
+ * TODO(jart): Rewrite in normal C.
+ */
+
+#define static
+
+/* clang-format off */
+
+#line 29 "net/http/uricspn.rl"
+
+#line 34 "build/bootstrap/net/http/uricspn.c"
+static const char _uricspn_key_offsets[] = {
+	0, 0
+};
+
+static const char _uricspn_trans_keys[] = {
+	33, 61, 95, 126, 36, 59, 63, 90, 
+	97, 122, 0
+};
+
+static const char _uricspn_single_lengths[] = {
+	0, 4
+};
+
+static const char _uricspn_range_lengths[] = {
+	0, 3
+};
+
+static const char _uricspn_index_offsets[] = {
+	0, 0
+};
+
+static const char _uricspn_trans_targs[] = {
+	1, 1, 1, 1, 1, 1, 1, 0, 
+	0
+};
+
+static const int uricspn_start = 1;
+static const int uricspn_first_final = 1;
+static const int uricspn_error = 0;
+
+static const int uricspn_en_machina = 1;
+
+
+#line 30 "net/http/uricspn.rl"
+/* clang-format on */
+
+int uricspn(const char *data, size_t size) {
+  int uricspn$avx(const char *, size_t) hidden;
+  const char *p, *pe;
+  int cs;
+
+  assert(data || !size);
+  assert(size <= 0x7ffff000);
+  assert(size <= 0x7ffff000);
+
+  if (X86_HAVE(AVX)) {
+    return uricspn$avx(data, size);
+  }
+
+  p = data;
+  pe = data + size;
+
+  /* clang-format off */
+
+  
+#line 56 "net/http/uricspn.rl"
+
+
+  
+#line 94 "build/bootstrap/net/http/uricspn.c"
+	{
+	cs = uricspn_start;
+	}
+
+#line 59 "net/http/uricspn.rl"
+  cs = uricspn_en_machina;
+  
+#line 102 "build/bootstrap/net/http/uricspn.c"
+	{
+	int _klen;
+	unsigned int _trans;
+	const char *_keys;
+
+	if ( p == pe )
+		goto _test_eof;
+	if ( cs == 0 )
+		goto _out;
+_resume:
+	_keys = _uricspn_trans_keys + _uricspn_key_offsets[cs];
+	_trans = _uricspn_index_offsets[cs];
+
+	_klen = _uricspn_single_lengths[cs];
+	if ( _klen > 0 ) {
+		const char *_lower = _keys;
+		const char *_mid;
+		const char *_upper = _keys + _klen - 1;
+		while (1) {
+			if ( _upper < _lower )
+				break;
+
+			_mid = _lower + ((_upper-_lower) >> 1);
+			if ( (*p) < *_mid )
+				_upper = _mid - 1;
+			else if ( (*p) > *_mid )
+				_lower = _mid + 1;
+			else {
+				_trans += (unsigned int)(_mid - _keys);
+				goto _match;
+			}
+		}
+		_keys += _klen;
+		_trans += _klen;
+	}
+
+	_klen = _uricspn_range_lengths[cs];
+	if ( _klen > 0 ) {
+		const char *_lower = _keys;
+		const char *_mid;
+		const char *_upper = _keys + (_klen<<1) - 2;
+		while (1) {
+			if ( _upper < _lower )
+				break;
+
+			_mid = _lower + (((_upper-_lower) >> 1) & ~1);
+			if ( (*p) < _mid[0] )
+				_upper = _mid - 2;
+			else if ( (*p) > _mid[1] )
+				_lower = _mid + 2;
+			else {
+				_trans += (unsigned int)((_mid - _keys)>>1);
+				goto _match;
+			}
+		}
+		_trans += _klen;
+	}
+
+_match:
+	cs = _uricspn_trans_targs[_trans];
+
+	if ( cs == 0 )
+		goto _out;
+	if ( ++p != pe )
+		goto _resume;
+	_test_eof: {}
+	_out: {}
+	}
+
+#line 61 "net/http/uricspn.rl"
+
+  /* clang-format on */
+
+  if (cs >= uricspn_first_final) {
+    return p - data;
+  } else {
+    return einval();
+  }
+}