mds-kbdc: misc

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 336 insertions, 0 deletions

diff --git a/src/mds-kbdc/builtin-functions.c b/src/mds-kbdc/builtin-functions.c
new file mode 100644
index 0000000..cfac8ac
--- /dev/null
+++ b/src/mds-kbdc/builtin-functions.c
@@ -0,0 +1,336 @@
+/**
+ * mds — A micro-display server
+ * Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "builtin-functions.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+
+
+/**
+ * Define useful data for built-in function with 2 parameters
+ */
+#define define_2						\
+  const char32_t* restrict a = *args++;				\
+  const char32_t* restrict b = *args++;				\
+  size_t an = string_length(a);					\
+  size_t bn = string_length(b);					\
+  size_t i, n = an > bn ? an : bn;				\
+  char32_t* restrict rc = malloc((n + 1) * sizeof(char32_t));	\
+  if (rc == NULL)						\
+    return NULL;						\
+  rc[n] = -1
+
+/**
+ * Define useful data for built-in function with 1 parameter
+ */
+#define define_1						\
+  const char32_t* restrict a = *args++;				\
+  size_t i, n = string_length(a);				\
+  char32_t* restrict rc = malloc((n + 1) * sizeof(char32_t));	\
+  if (rc == NULL)						\
+    return NULL;						\
+  rc[n] = -1
+
+
+/**
+ * Definition of the built-in function add/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_add_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] + b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function sub/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_sub_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] - b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function mul/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_mul_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] * b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function div/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_div_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] / b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function mod/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_mod_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] % b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function rsh/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_rsh_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] << b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function lsh/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_lsh_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] >> b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function or/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_or_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] | b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function and/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_and_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] & b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function xor/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_xor_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] ^ b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function not/1
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_not_1(const char32_t** restrict args)
+{
+  define_1;
+  for (i = 0; i < n; i++)
+    rc[i] = !a[i];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function equals/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_equals_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] == b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function greater/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_greater_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] > b[i % bn];
+  return rc;
+}
+
+
+/**
+ * Definition of the built-in function less/2
+ * 
+ * @param   args  The arguments passed to the function
+ * @return        The return value of the function, `NULL` on error
+ */
+static char32_t* builtin_function_less_2(const char32_t** restrict args)
+{
+  define_2;
+  for (i = 0; i < n; i++)
+    rc[i] = a[i % an] < b[i % bn];
+  return rc;
+}
+
+
+/* static char32_t* builtin_function_set_3(const char32_t** restrict args);  (variable index value) */
+/* static char32_t* builtin_function_get_2(const char32_t** restrict args);  (variable index) */
+
+
+#undef define_1
+#undef define_2
+
+
+/**
+ * Check whether a function is a builtin function
+ * 
+ * @param   name       The name of the function
+ * @param   arg_count  The number of arguments to pass to the function
+ * @return             Whether the described function is a builtin function
+ */
+int builtin_function_defined(const char* restrict name, size_t arg_count)
+{
+  size_t i;
+  static const char* const BUILTIN_FUNCTIONS_2[] =
+    {
+      "add", "sub", "mul", "div", "mod", "rsh", "lsh", "or",
+      "and", "xor", "equals", "greater", "less", "get", NULL
+    };
+  
+  if (arg_count == 3)
+    return !strcmp(name, "set");
+  else if (arg_count == 1)
+    return !strcmp(name, "not");
+  else if (arg_count == 2)
+    for (i = 0; BUILTIN_FUNCTIONS_2[i]; i++)
+      if (!strcmp(name, BUILTIN_FUNCTIONS_2[i]))
+	return 1;
+  
+  return 0;
+}
+
+
+/**
+ * Invoke a builtin function
+ * 
+ * @param   name       The name of the function
+ * @param   arg_count  The number of arguments to pass to the function
+ * @param   args       The arguments to pass
+ * @return             The return value of the function, `NULL` on error
+ */
+char32_t* builtin_function_invoke(const char* restrict name, size_t arg_count, const char32_t** restrict args)
+{
+  if (arg_count == 3)
+    if (!strcmp(name, "set"))
+      return NULL; /* TODO builtin_function_set_3(args) */
+  
+  if (arg_count == 1)
+    if (!strcmp(name, "not"))
+      return builtin_function_not_1(args);
+  
+  if (arg_count != 2)
+    return NULL;
+  
+  if (!strcmp(name, "add"))      return builtin_function_add_2(args);
+  if (!strcmp(name, "sub"))      return builtin_function_sub_2(args);
+  if (!strcmp(name, "mul"))      return builtin_function_mul_2(args);
+  if (!strcmp(name, "div"))      return builtin_function_div_2(args);
+  if (!strcmp(name, "mod"))      return builtin_function_mod_2(args);
+  if (!strcmp(name, "rsh"))      return builtin_function_rsh_2(args);
+  if (!strcmp(name, "lsh"))      return builtin_function_lsh_2(args);
+  if (!strcmp(name, "or"))       return builtin_function_or_2(args);
+  if (!strcmp(name, "and"))      return builtin_function_and_2(args);
+  if (!strcmp(name, "xor"))      return builtin_function_xor_2(args);
+  if (!strcmp(name, "equals"))   return builtin_function_equals_2(args);
+  if (!strcmp(name, "greater"))  return builtin_function_greater_2(args);
+  if (!strcmp(name, "less"))     return builtin_function_less_2(args);
+  if (!strcmp(name, "get"))      return NULL; /* TODO builtin_function_get_2(args) */
+  
+  return NULL;
+}
+