/**
* mds — A micro-display server
* Copyright © 2014, 2015, 2016, 2017 Mattias Andrée (maandree@kth.se)
*
* 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 "variables.h"
#include <libmdsserver/macros.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; \
fail_if (xmalloc(rc, n + 1, char32_t)); \
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; \
fail_if (xmalloc(rc, n + 1, char32_t)); \
rc[n] = -1
/**
* Return a value, or if there was a failure somewhere, return `NULL`
*
* @param v:void* The value to return on success
*/
#define return(v) \
return v; \
fail: \
return NULL;
/**
* 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);
}
/**
* Definition of the built-in function get/2
*
* @param args The arguments passed to the function
* @return The return value of the function, `NULL` on error
*/
static char32_t* builtin_function_get_2(const char32_t** restrict args)
{
const char32_t* restrict a = *args++;
const char32_t* restrict b = *args++;
char32_t* restrict rc;
size_t n = (size_t)*b;
mds_kbdc_tree_t* value = variables_get((size_t)*a)->array.elements;
while (n--)
value = value->next;
fail_if (rc = string_dup(value->compiled_string.string), rc == NULL);
return(rc);
}
/**
* Definition of the built-in function set/3
*
* @param args The arguments passed to the function
* @return The return value of the function, `NULL` on error
*/
static char32_t* builtin_function_set_3(const char32_t** restrict args)
{
const char32_t* restrict a = *args++;
const char32_t* restrict b = *args++;
const char32_t* restrict c = *args++;
char32_t* restrict rc;
size_t n = (size_t)*b;
mds_kbdc_tree_t* value = variables_get((size_t)*a)->array.elements;
while (n--)
value = value->next;
free(value->compiled_string.string);
value->compiled_string.string = string_dup(c);
fail_if (value->compiled_string.string == NULL);
fail_if (rc = string_dup(c), rc == NULL);
return(rc);
}
#undef define_1
#undef define_2
#undef return
/**
* 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
*
* The function will abort if an non-builtin function is addressed
*
* Before invoking set/3 or get/2, please check the arguments,
* please also check that either all or none of the arguments
* are empty string for any of the other builtin functions
*
* @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)
{
#define t(f) do { fail_if (rc = builtin_function_##f(args), rc == NULL); return rc; } while (0)
char32_t* rc;
if ((arg_count == 3) && !strcmp(name, "set")) t (set_3);
if ((arg_count == 1) && !strcmp(name, "not")) t (not_1);
if (arg_count != 2)
abort();
if (!strcmp(name, "add")) t (add_2);
if (!strcmp(name, "sub")) t (sub_2);
if (!strcmp(name, "mul")) t (mul_2);
if (!strcmp(name, "div")) t (div_2);
if (!strcmp(name, "mod")) t (mod_2);
if (!strcmp(name, "rsh")) t (rsh_2);
if (!strcmp(name, "lsh")) t (lsh_2);
if (!strcmp(name, "or")) t (or_2);
if (!strcmp(name, "and")) t (and_2);
if (!strcmp(name, "xor")) t (xor_2);
if (!strcmp(name, "equals")) t (equals_2);
if (!strcmp(name, "greater")) t (greater_2);
if (!strcmp(name, "less")) t (less_2);
if (!strcmp(name, "get")) t (get_2);
abort();
fail:
return NULL;
#undef t
}
