Reorganize source tree to use single autotools instance

Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 271 insertions, 0 deletions

diff --git a/src/vlib/lex.c b/src/vlib/lex.c
new file mode 100644
index 00000000000..1cc8f1678d2
--- /dev/null
+++ b/src/vlib/lex.c
@@ -0,0 +1,271 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <vlib/vlib.h>
+#include <vlib/lex.h>
+
+vlib_lex_main_t vlib_lex_main;
+
+#define LEX_DEBUG 0
+
+u8 *
+format_vlib_lex_token (u8 * s, va_list * args)
+{
+  vlib_lex_main_t *lm = va_arg (*args, vlib_lex_main_t *);
+  vlib_lex_token_t *t = va_arg (*args, vlib_lex_token_t *);
+
+  if (t->token == VLIB_LEX_word)
+    s = format (s, "%s", t->value.as_pointer);
+  else
+    s = format (s, "%s", lm->lex_token_names[t->token]);
+  return s;
+}
+
+void
+vlib_lex_get_token (vlib_lex_main_t * lm, vlib_lex_token_t * rv)
+{
+  u8 c;
+  vlib_lex_table_t *t;
+  vlib_lex_table_entry_t *e;
+  uword tv;
+
+  if (PREDICT_FALSE (lm->pushback_sp >= 0))
+    {
+      rv[0] = lm->pushback_vector[lm->pushback_sp--];
+      return;
+    }
+
+  rv->value.as_uword = ~0;
+
+  while (1)
+    {
+      if (PREDICT_FALSE (lm->current_index >= vec_len (lm->input_vector)))
+	{
+	  rv->token = VLIB_LEX_eof;
+	  return;
+	}
+
+      t = vec_elt_at_index (lm->lex_tables, lm->current_table_index);
+      c = (lm->input_vector[lm->current_index++]) & 0x7f;
+      e = &t->entries[c];
+      lm->current_table_index = e->next_table_index;
+
+      switch (e->action)
+	{
+	case VLIB_LEX_IGNORE:
+	  continue;
+
+	case VLIB_LEX_START_NUMBER:
+	  lm->current_token_value = 0;
+	  /* fallthru */
+
+	case VLIB_LEX_ADD_TO_NUMBER:
+	  lm->current_number_base = e->token;
+	  lm->current_token_value *= lm->current_number_base;
+	  tv = c - '0';
+	  if (tv >= lm->current_number_base)
+	    {
+	      tv = 10 + c - 'A';
+	      if (tv >= lm->current_number_base)
+		tv = 10 + c - 'a';
+	    }
+	  lm->current_token_value += tv;
+	  continue;
+
+	case VLIB_LEX_ADD_TO_TOKEN:
+	  vec_add1 (lm->token_buffer, c);
+	  continue;
+
+	case VLIB_LEX_KEYWORD_CHECK:
+	  {
+	    uword *p;
+
+	    vec_add1 (lm->token_buffer, 0);
+
+	    /* It's either a keyword or just a word. */
+	    p = hash_get_mem (lm->lex_keywords, lm->token_buffer);
+	    if (p)
+	      {
+		rv->token = p[0];
+		if (LEX_DEBUG > 0)
+		  clib_warning ("keyword '%s' token %s",
+				lm->token_buffer,
+				lm->lex_token_names[rv->token]);
+	      }
+	    else
+	      {
+		/* it's a WORD */
+		rv->token = VLIB_LEX_word;
+		rv->value.as_pointer = vec_dup (lm->token_buffer);
+		if (LEX_DEBUG > 0)
+		  clib_warning ("%s, value '%s'",
+				lm->lex_token_names[VLIB_LEX_word],
+				rv->value.as_pointer);
+	      }
+	    _vec_len (lm->token_buffer) = 0;
+
+	    /* Rescan the character which terminated the keyword/word. */
+	    lm->current_index--;
+	    return;
+	  }
+
+	case VLIB_LEX_RETURN_AND_RESCAN:
+	  ASSERT (lm->current_index);
+	  lm->current_index--;
+	  /* note flow-through */
+
+	case VLIB_LEX_RETURN:
+	  rv->token = e->token;
+	  rv->value.as_uword = lm->current_token_value;
+	  lm->current_token_value = ~0;
+	  if (LEX_DEBUG > 0)
+	    {
+	      clib_warning
+		("table %s char '%c'(0x%02x) next table %s return %s",
+		 t->name, c, c, lm->lex_tables[e->next_table_index].name,
+		 lm->lex_token_names[e->token]);
+	      if (rv->token == VLIB_LEX_number)
+		clib_warning ("  numeric value 0x%x (%d)", rv->value,
+			      rv->value);
+	    }
+	  return;
+	}
+    }
+}
+
+u16
+vlib_lex_add_token (vlib_lex_main_t * lm, char *token_name)
+{
+  uword *p;
+  u16 rv;
+
+  p = hash_get_mem (lm->lex_tokens_by_name, token_name);
+
+  if (p)
+    return p[0];
+
+  rv = vec_len (lm->lex_token_names);
+  hash_set_mem (lm->lex_tokens_by_name, token_name, rv);
+  vec_add1 (lm->lex_token_names, token_name);
+
+  return rv;
+}
+
+static u16
+add_keyword (vlib_lex_main_t * lm, char *keyword, char *token_name)
+{
+  uword *p;
+  u16 token;
+
+  p = hash_get_mem (lm->lex_keywords, keyword);
+
+  ASSERT (p == 0);
+
+  token = vlib_lex_add_token (lm, token_name);
+
+  hash_set_mem (lm->lex_keywords, keyword, token);
+  return token;
+}
+
+u16
+vlib_lex_find_or_add_keyword (vlib_lex_main_t * lm, char *keyword,
+			      char *token_name)
+{
+  uword *p = hash_get_mem (lm->lex_keywords, keyword);
+  return p ? p[0] : add_keyword (lm, keyword, token_name);
+}
+
+void
+vlib_lex_set_action_range (u32 table_index, u8 lo, u8 hi, u16 action,
+			   u16 token, u32 next_table_index)
+{
+  int i;
+  vlib_lex_main_t *lm = &vlib_lex_main;
+  vlib_lex_table_t *t = pool_elt_at_index (lm->lex_tables, table_index);
+
+  for (i = lo; i <= hi; i++)
+    {
+      ASSERT (i < ARRAY_LEN (t->entries));
+      t->entries[i].action = action;
+      t->entries[i].token = token;
+      t->entries[i].next_table_index = next_table_index;
+    }
+}
+
+u16
+vlib_lex_add_table (char *name)
+{
+  vlib_lex_main_t *lm = &vlib_lex_main;
+  vlib_lex_table_t *t;
+  uword *p;
+
+  p = hash_get_mem (lm->lex_tables_by_name, name);
+
+  ASSERT (p == 0);
+
+  pool_get_aligned (lm->lex_tables, t, CLIB_CACHE_LINE_BYTES);
+
+  t->name = name;
+
+  hash_set_mem (lm->lex_tables_by_name, name, t - lm->lex_tables);
+
+  vlib_lex_set_action_range (t - lm->lex_tables, 1, 0x7F, VLIB_LEX_IGNORE, ~0,
+			     t - lm->lex_tables);
+
+  vlib_lex_set_action_range (t - lm->lex_tables, 0, 0, VLIB_LEX_RETURN,
+			     VLIB_LEX_eof, t - lm->lex_tables);
+
+  return t - lm->lex_tables;
+}
+
+void
+vlib_lex_reset (vlib_lex_main_t * lm, u8 * input_vector)
+{
+  if (lm->pushback_vector)
+    _vec_len (lm->pushback_vector) = 0;
+  lm->pushback_sp = -1;
+
+  lm->input_vector = input_vector;
+  lm->current_index = 0;
+}
+
+static clib_error_t *
+lex_onetime_init (vlib_main_t * vm)
+{
+  vlib_lex_main_t *lm = &vlib_lex_main;
+
+  lm->lex_tables_by_name = hash_create_string (0, sizeof (uword));
+  lm->lex_tokens_by_name = hash_create_string (0, sizeof (uword));
+  lm->lex_keywords = hash_create_string (0, sizeof (uword));
+  lm->pushback_sp = -1;
+
+#define _(f) { u16 tmp = vlib_lex_add_token (lm, #f); ASSERT (tmp == VLIB_LEX_##f); }
+  foreach_vlib_lex_global_token;
+#undef _
+
+  vec_validate (lm->token_buffer, 127);
+  _vec_len (lm->token_buffer) = 0;
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (lex_onetime_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */