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289 lines (276 loc) · 8.65 KB
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Copy patht-ihm.c
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289 lines (276 loc) · 8.65 KB
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#include <stdio.h>
#include <stdlib.h>
#include <setjmp.h>
#include "may.h"
#undef numberof
#define numberof(x) (sizeof (x) / sizeof ((x)[0]))
/* Definition of the internal operators */
static void
setjmp_handler (may_error_e e, const char *desc, const void *data)
{
(void) desc;
longjmp ( *(jmp_buf*)data, e);
}
static may_t help (may_t unused);
static int eval_count;
static may_t eval (may_t x) {
unsigned long p;
if (may_get_ui (&p, x) < 0)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
eval_count = p;
return may_set_ui (0);
}
static may_t prec (may_t x) {
unsigned long p;
if (may_get_ui (&p, x) < 0)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
p = may_kernel_prec (p);
return may_set_ui (p);
}
static may_t intmod (may_t x) {
if (may_get_name (x) != may_integer_name)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
x = may_kernel_intmod (x);
return x == 0 ? may_set_ui (0) : x;
}
static may_t domain (may_t d) {
const char *name;
if (may_get_str (&name, d) < 0)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
if (strcmp (name, "real") == 0)
may_kernel_domain (MAY_REAL_D);
else if (strcmp(name, "complex") == 0)
may_kernel_domain (MAY_COMPLEX_D);
else if (strcmp(name, "integer") == 0)
may_kernel_domain (MAY_INTEGER_D);
else
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
return may_set_ui (0);
}
static may_t mem (may_t unused) {
(void) unused;
may_kernel_info (stdout, "");
return may_set_ui (0);
}
static may_t write (may_t x) {
if (strcmp (may_get_name (x), may_list_name) != 0 || may_nops (x) != 2)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
const char *filename;
if (may_get_str (&filename, may_op (x, 0)) != 0)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
FILE *f = fopen (filename, "w");
if (f == NULL)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
may_out_string (f, may_op (x, 1));
fclose (f);
return may_set_ui (0);
}
static may_t read (may_t x) {
const char *filename;
if (may_get_str (&filename, x) != 0)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
FILE *f = fopen (filename, "r");
if (f == NULL)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
may_t r;
may_in_string (&r, f);
fclose (f);
return r;
}
static may_t rectform (may_t x) {
may_t r, i;
may_rectform (&r, &i, x);
return may_set_cx (r, i);
}
static may_t subs (may_t x){
if (strcmp (may_get_name (x), may_list_name) != 0 || may_nops (x) != 3)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
return may_replace (may_op (x, 0), may_op (x, 1), may_op (x, 2));
}
static may_t series (may_t x) {
unsigned long p;
if (strcmp (may_get_name (x), may_list_name) != 0 || may_nops (x) != 3
|| may_get_ui (&p, may_op (x, 2)) < 0)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
return may_series (may_op (x, 0), may_op (x, 1), p);
}
static may_t partfrac (may_t x) {
if (may_nops (x) != 2)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
x = may_partfrac (may_op (x, 0), may_op (x, 1), NULL);
if (x == NULL)
may_error_throw (MAY_CANT_BE_CONVERTED_ERR, NULL);
return x;
}
static may_t factor (may_t x) {
if (may_get_name (x) == may_list_name && may_nops (x) != 2)
return may_ratfactor (may_op (x, 0), may_op (x, 1));
else
return may_ratfactor (x, NULL);
}
static may_t approx (may_t x) {
if (may_get_name (x) != may_list_name || may_nops (x) != 2)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
unsigned long n;
if (may_get_ui (&n, may_op (x, 1))<0)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
return may_approx (may_op (x, 0), 10, n, GMP_RNDN);
}
static may_t degree (may_t x) {
if (may_get_name (x) != may_list_name || may_nops (x) != 2)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
may_t var = may_op (x, 1);
mpz_srcptr z;
if (!may_degree (NULL, &z, NULL, may_op (x, 0), 1, &var))
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
return may_set_z (z);
}
static may_t collect (may_t x) {
if (may_get_name (x) != may_list_name || may_nops (x) != 2)
may_error_throw (MAY_INVALID_TOKEN_ERR, NULL);
return may_collect (may_op(x, 0), may_op (x, 1));
}
static const char *const op_name[] = {
"approx", "degree", "eval", "mem", "read", "write",
"expand", "evalf", "evalr", "factor",
"trig2exp", "exp2trig", "trig2tan2", "tan2sincos", "partfrac", "pow2exp",
"rationalize", "normalsign", "rectform",
"combine", "eexpand", "sign2abs", "texpand", "tcollect", "collect",
"indets", "subs", "series", "sqrtsimp",
"prec", "intmod", "domain", "help"
};
static const void *const op_func[] = {
approx, degree, eval, mem, read, write,
may_expand, may_evalf, may_evalr, factor,
may_trig2exp, may_exp2trig, may_trig2tan2, may_tan2sincos, partfrac, may_pow2exp,
may_rationalize, may_normalsign, rectform,
may_combine, may_eexpand, may_sign2abs, may_texpand, may_tcollect, collect,
may_indets, subs, series, may_sqrtsimp,
prec, intmod, domain, help
};
static may_t help (may_t unused)
{
unsigned int i;
(void) unused;
for (i = 0; i < numberof (op_name); i++)
printf ("%s\t", op_name[i]);
printf ("\n");
return may_set_str ("_");
}
/*********************************************************/
static const char * const var_name[] = {
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z" };
static char * update_variable (char *Buffer, int *save_it, may_t table[26])
{
*save_it = 0;
char *a = strstr (Buffer, ":=");
if (a) {
char *var = Buffer;
*a = 0;
a += 2;
if (var[1] == 0 && var[0] >= 'a' && var[1] <= 'z') {
*save_it = var[0] - 'a' + 1;
if (*a == 0) {
/* Delete it */
table[*save_it-1] = NULL;
*save_it = -1;
}
} else {
printf ("WARNING: '%s' is not a one lower case letter variable. It won't be memorised\n", var);
}
} else
a = Buffer;
return a;
}
static may_t replace_variables (may_t x, may_t table[26])
{
may_t r = may_subs_c(x, eval_count, numberof(var_name), var_name, (const void **) table);
return may_eval (r);
}
int main (int argc, const char *argv[])
{
char Buffer[200];
jmp_buf err_buffer;
int err_code;
may_t r;
may_mark_t original_mark, local_mark;
may_t global_table[26];
int save_it = 0;
int quiet = 0;
size_t size2alloc = 0;
for (int i = 1; i < argc; i++) {
if (strcmp(argv[i], "-q") == 0)
quiet = 1;
else if (strcmp (argv[i], "-m") == 0 && i != (argc-1)) {
size2alloc = atoi (argv[i+1]) * (1UL << (sizeof (int)*5));
i++;
} else {
fprintf (stderr, "Unkwown option: %s\n", argv[i]);
exit (2);
}
}
eval_count = 1;
memset (global_table, 0, sizeof global_table);
may_kernel_start (size2alloc, 0);
may_kernel_prec (53);
if (quiet == 0)
printf ("Expression Evaluator\n"
"Using %s\n"
"Enter 'exit' to quit\n", may_get_version ());
r = may_set_ui (0);
/* Register exception handler */
err_code = setjmp(err_buffer);
if (err_code == 0) {
may_error_catch (setjmp_handler, &err_buffer);
may_mark (original_mark);
/* Loop until exit */
while (1) {
char *e;
/* Read string and handle exit */
if (quiet == 0) {
printf ("$ ");
fflush (stdout);
}
if (fgets (Buffer, sizeof Buffer, stdin) == 0)
break;
if ((e = strchr (Buffer, '\n')))
*e = 0;
if (strcmp (Buffer, "exit") == 0)
break;
/* Parsing and check if it is needed to save the variable latter */
may_mark (local_mark);
e = may_parse_c (&r, update_variable (Buffer, &save_it, global_table));
if (*e != 0) {
printf ("Syntax Error: '%s'.\n", e);
may_compact (local_mark, NULL);
continue;
}
/* Evaluation and take into account operator */
r = replace_variables (r, global_table);
r = may_subs_c(r, 1, numberof(op_name), op_name, op_func);
r = may_eval (r);
/* Display */
e = may_get_string (NULL, 0, r);
printf("%s\n", e);
/* Save and compact */
if (save_it > 0) {
/* Save the new variable (garbage the memory before) */
global_table[save_it-1] = may_compact (local_mark, r);
} else if (save_it < 0) {
/* A variable was deleted: garbash all the table */
may_compact_v (original_mark, numberof (global_table), global_table);
} else {
/* Nothing to save except old globals which were compacted pass the local_mark */
may_compact (local_mark, NULL);
}
}
may_keep (original_mark, NULL);
may_error_uncatch ();
} else {
may_kernel_info (stdout, "FATAL");
printf("Exception %d caught: %s\n",
err_code, may_error_what (err_code));
}
may_kernel_end ();
exit (0);
}