/
mouse.c
1435 lines (1283 loc) · 28.9 KB
/
mouse.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdbool.h>
#include <math.h>
#include <time.h>
#define MAXPROGLEN 1000000
#define MAXPROGLINELEN 999
#define STACKSIZE 99999
#define ENVSTACKSIZE 99999
#define LOCSIZE 26
#define MAXADDR 99999999
#define HALFWIDTH 39
#define MOUSE_EXT ".m02"
#define ARRAYSIZE 10000
#define MAXFILES 100
#define BACKSPACE charpos--
#define VALUE(digit) (digit - '0')
#define UPPERCASE ch = (char) toupper(ch)
#define TOLERANCE 1.0e-6
#ifndef PI
#define PI 3.14159265358979323846264338327950288419716939937510582097494459230
#endif
#define SPEED_OF_LIGHT 299792458.0
#define ELEMENTARY_CHG 1.60217653e-19
#define GRAV_ACCEL 9.80665
#define GRAV_CONST 6.6742e-11
#define PLANCK 6.6260693e-34
#define H_BAR 1.05457168e-34
#define PERMEABILITY (4.0e-7*PI)
#define PERMITTIVITY (1.0/(PERMEABILITY*SPEED_OF_LIGHT*SPEED_OF_LIGHT))
#define MASS_ELECTRON 9.1093826e-31
#define MASS_PROTON 1.67262171e-27
#define MASS_NEUTRON 1.67492728e-27
#define AVAGADRO 6.0221415e23
#define BOLTZMANN 1.3806505e-23
#define AU 1.49597870e11
#define GM_EARTH 3.9860005e14
#define GM_SUN 1.32712438e20
#define R_EARTH 6.378140e6
#define LB_KG 0.45359237
#define IN_CM 2.54
#define GAL_L 3.7854118
#define DEFAULT_ANGLE_FACTOR 1.0
#define DEFAULT_DISPLAY_MODE 2
#define DEFAULT_DISPLAY_DIGITS 15
#define DEFAULT_DISPLAY_WIDTH 0
#define DEFAULT_WORDSIZE 32
#define DEFAULT_OCTHEX_DIGITS ((DEFAULT_WORDSIZE-1)/4+1)
#define VERSION 20
#define PROMPT "\n> "
#define COMPARE_EPS 1e-11 // (default) epsilon for fp comparisons
enum tagtype {
macro,
parameter,
loop
};
typedef struct {
enum tagtype tag;
long charpos;
long offset;
}
environment;
FILE * progfile;
char prog[MAXPROGLEN];
char prog_line[MAXPROGLINELEN + 2];
double stack[STACKSIZE];
environment envstack[ENVSTACKSIZE];
double data[MAXADDR];
long macdefs[26];
char ch;
long charpos;
long proglen;
long sp;
long esp;
long tsp;
long offset;
long nextfree;
double temp, temp2, temp3;
long itemp, itemp2;
long parbal;
long parnum;
int tracing;
int disaster;
int j;
char filename[101];
char format_str[11];
long ntemp;
int done;
char line[133];
int source;
double array[ARRAYSIZE];
int error_flag;
FILE * fp[MAXFILES];
char filename_str[13];
char filenum_str[4];
char filemode_str[3];
char temp_str[25];
enum tagtype envtag;
double angle_factor = DEFAULT_ANGLE_FACTOR;
long display_mode = DEFAULT_DISPLAY_MODE;
long display_digits = DEFAULT_DISPLAY_DIGITS;
long display_width = DEFAULT_DISPLAY_WIDTH;
long wordsize = DEFAULT_WORDSIZE;
long octhex_digits = DEFAULT_OCTHEX_DIGITS;
long octhex_mask = 0xFFFFFFFF;
void chomp(char * str);
void display(long charpos);
void error(short code);
void Getchar(void);
void push(double datum);
double pop(void);
void skipstring(void);
void skip(char lch, char rch);
void skip2(char lch, char rch1, char rch2);
void pushenv(enum tagtype tag);
void popenv(void);
void load(void);
void makedeftable(void);
void interpret(void);
void process_amp(char * str);
double Int(double f);
double Frac(double f);
int Round(double x);
bool compare_eps(const double a,
const double b,
const double eps);
// i think this is how we compare ieee-754 numbers instead of == in C
bool compare_eps(const double a,
const double b,
const double eps) {
return fabsl(a - b) < eps;
}
int
main(int argc, char * argv[]) {
if (argc == 1) {
source = 1;
done = 0;
printf("Mouse-2002 Interpreter Version %d\n", VERSION);
sp = -1;
esp = -1;
do {
printf(PROMPT);
fgets(line, 132, stdin);
load();
interpret();
}
while (!done);
exit(0);
}
source = 0;
strcpy(filename, argv[1]);
if (strchr(filename, (int)
'.') == NULL)
strcat(filename, MOUSE_EXT);
if ((progfile = fopen(filename, "rb")) == NULL) {
printf("Error opening file %s\n", filename);
exit(1);
}
load();
fclose(progfile);
if (!disaster) {
makedeftable();
interpret();
}
return 0;
}
void
display(long charpos_local) {
long pos;
char * prog_ptr;
if (source == 0)
prog_ptr = prog;
else
prog_ptr = prog_line;
for (j = 0; j < 4; j++) {
if (j > sp)
printf(" ..........");
else
printf("%12.4e", stack[sp - j]);
}
printf(" ");
for (pos = charpos_local - HALFWIDTH; pos <= charpos_local + HALFWIDTH; pos++) {
if ((pos >= 0) && (pos < proglen) && (prog_ptr[pos] >= ' '))
printf("%c", prog_ptr[pos]);
else
printf(" ");
}
printf("\n");
for (j = 0; j < HALFWIDTH + 54; j++)
printf(" ");
printf("^\n");
}
void
error(short code) {
short tsp_local;
printf("\nEnvironment:\n");
for (tsp_local = 0; tsp_local < esp; tsp++)
display(envstack[tsp].charpos);
printf("Instruction pointer:\n");
display(charpos);
printf("Stack:");
for (tsp = 0; tsp <= sp; tsp++)
printf(" [%17.10E] ", stack[tsp]);
printf("\n");
printf("***** Error %d: ", code);
switch (code) {
case 1:
printf("Ran off end of program");
break;
case 2:
printf("Calculation stack overflowed");
break;
case 3:
printf("Calculation stack underflowed");
break;
case 4:
printf("Attempted to divide by zero");
break;
case 5:
printf("Attempted to find modulus by zero");
break;
case 6:
printf("Undefined macro");
break;
case 7:
printf("Illegal character follows \"#\"");
break;
case 8:
printf("Environment stack overflowed");
break;
case 9:
printf("Environment stack underflowed");
break;
case 10:
printf("Data space exhausted");
break;
case 11:
printf("Illegal character %d", ch);
break;
case 12:
printf("Invalid argument for &acos");
break;
case 13:
printf("Invalid argument for &acosh");
break;
case 14:
printf("Invalid argument for &asin");
break;
case 15:
printf("Invalid argument for &atanh");
break;
case 16:
printf("Invalid argument for &ln");
break;
case 17:
printf("Invalid argument for &log2");
break;
case 18:
printf("Invalid argument for &log10");
break;
case 19:
printf("Invalid argument for &recip");
break;
case 20:
printf("Invalid argument for &sqrt");
break;
case 21:
printf("Invalid argument for &!");
break;
case 22:
printf("Invalid word size");
break;
case 23:
printf("Invalid arguments for &cnr");
break;
case 24:
printf("Invalid arguments for &pnr");
break;
case 25:
printf("Array index out of bounds");
break;
case 26:
printf("Invalid argument for ` or &power");
break;
case 27:
printf("Invalid arguments for &root");
break;
case 28:
printf("Error opening file");
break;
case 29:
printf("Invalid & function name");
break;
case 30:
printf("Invalid argument for &cubert");
break;
case 31:
printf("Invalid argument for &4thrt");
break;
}
printf("\n");
disaster = 1;
sp = -1;
}
void
Getchar(void) {
if (charpos < proglen - 1) {
charpos++;
if (source == 0)
ch = prog[charpos];
else
ch = prog_line[charpos];
} else
error(1);
}
void
push(double datum) {
if (sp < STACKSIZE - 1) {
sp++;
stack[sp] = datum;
} else
error(2);
}
double
pop(void) {
double result = 0;
if (sp >= 0) {
result = stack[sp];
sp--;
} else
error(3);
return result;
}
void
skipstring(void) {
do {
Getchar();
}
while (ch != '"');
}
void
skip(char lch, char rch) {
short count;
count = 1;
do {
Getchar();
if (ch == '"')
skipstring();
else if (ch == lch)
count++;
else if (ch == rch)
count--;
}
while (count != 0);
}
void
skip2(char lch, char rch1, char rch2) {
short count;
count = 1;
do {
Getchar();
if (ch == '"')
skipstring();
else if (ch == lch)
count++;
else if (ch == rch1 || ch == rch2)
count--;
}
while (count != 0);
}
void
pushenv(enum tagtype tag) {
if (esp < ENVSTACKSIZE - 1) {
esp++;
envstack[esp].tag = tag;
envstack[esp].charpos = charpos;
envstack[esp].offset = offset;
} else
error(8);
}
void
popenv(void) {
if (esp >= 0) {
envtag = envstack[esp].tag;
charpos = envstack[esp].charpos;
offset = envstack[esp].offset;
esp--;
} else
error(9);
}
void
load(void) {
char lastchr;
char in = 0;
char in_amp = 0;
char * p;
char * prog_ptr;
long maxlen;
if (source == 0) {
for (charpos = 0; charpos < MAXPROGLEN; charpos++)
prog[charpos] = ' ';
rewind(progfile);
prog_ptr = prog;
maxlen = MAXPROGLEN;
} else {
p = line;
prog_ptr = prog_line;
maxlen = MAXPROGLINELEN;
}
charpos = -1;
disaster = 0;
ch = '~';
while (!disaster) {
lastchr = ch;
if (source == 0) {
fread( & ch, 1, 1, progfile);
if (feof(progfile))
break;
} else {
ch = * p++;
if (ch == '\0' || ch == '\n')
break;
}
if (ch == '~') {
if (source == 0)
do {
fread( & ch, 1, 1, progfile);
}
while (ch != '\n');
else
break;
} else if (charpos < maxlen - 1) {
charpos++;
prog_ptr[charpos] = ch;
if (ch == '\"')
in = ! in ;
if (ch == '&' && ! in )
in_amp = 1;
if (ch == 10 || ch == 13 || ch == '\n' || ch == '\t' || ch == '\r')
prog_ptr[charpos] = ch = ' ';
if (in_amp && ch == ' ') {
prog_ptr[charpos] = ch = '&';
in_amp = 0;
}
if (in_amp && ch == ';') {
prog_ptr[charpos] = ch = '&';
charpos++;
prog_ptr[charpos] = ch = ';';
in_amp = 0;
}
if (ch == ' ' && ! in && !isdigit(lastchr) && (lastchr != '\'')) {
charpos--;
ch = prog_ptr[charpos];
} else if (! in && lastchr == ' ' && !isdigit(ch) && ch != '\"' &&
prog_ptr[charpos - 2] != '\'')
prog_ptr[--charpos] = ch;
} else {
printf("Program is too long\n");
disaster = 1;
}
}
proglen = charpos + 1;
if (source == 1) {
prog_ptr[charpos + 1] = '$';
charpos++;
proglen = charpos + 1;
}
}
void
makedeftable(void) {
for (ch = 'A'; ch <= 'Z'; ch++)
macdefs[ch - 'A'] = 0;
charpos = -1;
do {
Getchar();
if (ch == '$' && charpos < proglen - 1) {
Getchar();
UPPERCASE;
if ((ch >= 'A') && (ch <= 'Z'))
macdefs[ch - 'A'] = charpos;
}
}
while (charpos < proglen - 1);
}
void
interpret(void) {
char amp_str[11];
char * p;
char instr[26];
charpos = -1;
if (source == 0) {
sp = -1;
esp = -1;
}
offset = 0;
nextfree = LOCSIZE;
do {
Getchar();
if (ch == ' ')
continue;
if (tracing)
display(charpos);
if (isdigit(ch)) {
temp = 0;
while (isdigit(ch)) {
temp = 10 * temp + VALUE(ch);
Getchar();
}
if (ch == '.') {
Getchar();
temp2 = 1.0;
while (isdigit(ch)) {
temp2 /= 10.0;
temp += temp2 * VALUE(ch);
Getchar();
}
}
push(temp);
BACKSPACE;
} else if ((ch >= 'A') && (ch <= 'Z'))
push(ch - 'A');
else if ((ch >= 'a') && (ch <= 'z'))
push((double)(ch - 'a' + offset));
else
switch (ch) {
case '$':
break;
case '_':
push(-pop());
break;
case '+':
push(pop() + pop());
break;
case '-':
temp = pop();
push(pop() - temp);
break;
case '*':
push(pop() * pop());
break;
case '/':
temp = pop();
if (!compare_eps(temp, 0, COMPARE_EPS))
push(pop() / temp);
else
error(4);
break;
case '\\':
temp = pop();
if (!compare_eps(temp, 0, COMPARE_EPS))
push((double)(((long) pop()) % (long) temp));
else
error(5);
break;
case '?':
Getchar();
if (ch == '\'') {
fgets(instr, 2, stdin);
chomp(instr);
sscanf(instr, "%c", & ch);
push((double) ch);
} else {
fgets(instr, 25, stdin);
chomp(instr);
sscanf(instr, "%lf", & temp);
push(temp);
BACKSPACE;
}
break;
case '!':
Getchar();
if (ch == '\'')
printf("%c", Round(pop()));
else {
sprintf(format_str, "%%%ld.", display_width);
sprintf(temp_str, "%ld", display_digits);
strcat(format_str, temp_str);
if (display_mode == 0)
strcat(format_str, "f");
else if (display_mode == 1)
strcat(format_str, "E");
else
strcat(format_str, "G");
printf(format_str, pop());
BACKSPACE;
}
break;
case '"':
do {
Getchar();
if (ch == '!')
printf("\n");
else if (ch != '"')
printf("%c", ch);
}
while (ch != '"');
break;
case ':':
temp = pop();
data[Round(temp)] = pop();
break;
case '.':
push(data[Round(pop())]);
break;
case '<':
temp = pop();
push((pop() < temp) ? 1 : 0);
break;
case '=':
temp = pop();
const double temp_pop2 = pop();
push((compare_eps(temp, temp_pop2, COMPARE_EPS)) ? 1 : 0);
break;
case '>':
temp = pop();
push((pop() > temp) ? 1 : 0);
break;
case '[':
if (pop() <= 0)
skip2('[', '|', ']');
break;
case ']':
break;
case '|':
skip('[', ']');
break;
case '(':
pushenv(loop);
break;
case ')':
charpos = envstack[esp].charpos;
break;
case '^':
if (pop() <= 0) {
popenv();
skip('(', ')');
}
break;
case '#':
Getchar();
UPPERCASE;
if ((ch >= 'A') && (ch <= 'Z')) {
if (macdefs[ch - 'A'] > 0) {
pushenv(macro);
charpos = macdefs[ch - 'A'];
if (nextfree > (MAXADDR - LOCSIZE)) // previous: nextfree + LOCSIZE <= MAXADDR
{
offset = nextfree;
nextfree += LOCSIZE;
} else
error(10);
} else
error(6);
} else
error(7);
break;
case '@':
do {
popenv();
}
while (envtag != macro);
skip('#', ';');
nextfree -= LOCSIZE;
break;
case '%':
pushenv(parameter);
parbal = 1;
tsp = esp;
do {
tsp--;
switch (envstack[tsp].tag) {
case macro:
parbal--;
break;
case parameter:
parbal++;
break;
case loop:
break;
}
}
while (parbal != 0);
charpos = envstack[tsp].charpos;
offset = envstack[tsp].offset;
parnum = (long) pop();
do {
Getchar();
if (ch == '"')
skipstring();
else if (ch == '#')
skip('#', ';');
else if (ch == ',')
parnum--;
else if (ch == ';') {
parnum = 0;
popenv();
}
}
while (parnum != 0);
break;
case ',':
case ';':
popenv();
break;
case '\'':
Getchar();
push(ch);
break;
case '{':
tracing = 1;
break;
case '}':
tracing = 0;
break;
case '&':
p = amp_str;
Getchar();
while (ch != '&' && ch != '$') {
* p++ = (char) tolower(ch);
Getchar();
}
* p = '\0';
process_amp(amp_str);
break;
default:
error(11);
break;
}
}
while (!((ch == '$') || disaster));
}
void
process_amp(char * str) {
long i = 0, j_local = 0;
double hr, min, sec;
struct tm * systime;
time_t t;
char instr[26];
if (!strcmp(str, "2x"))
push(pow(2.0, pop()));
else if (!strcmp(str, "4th")) {
temp = pop();
push(temp * temp * temp * temp);
} else if (!strcmp(str, "4thrt")) {
temp = pop();
if (temp >= 0.0)
push(sqrt(sqrt(temp)));
else
error(31);
} else if (!strcmp(str, "10x"))
push(pow(10.0, pop()));
else if (!strcmp(str, "abs"))
push(fabs(pop()));
else if (!strcmp(str, "acos")) {
temp = pop();
if (fabs(temp) <= 1.0)
push(acos(temp) / angle_factor);
else
error(12);
} else if (!strcmp(str, "acosh")) {
temp = pop();
if (temp >= 1.0)
push(log(temp + sqrt(temp * temp - 1.0)));
else
error(13);
} else if (!strcmp(str, "and")) {
itemp = Round(pop());
itemp2 = Round(pop());
push((double)(itemp & itemp2));
} else if (!strcmp(str, "asin")) {
temp = pop();
if (fabs(temp) <= 1.0)
push(asin(temp) / angle_factor);
else
error(14);
} else if (!strcmp(str, "asinh")) {
temp = pop();
push(log(temp + sqrt(temp * temp + 1.0)));
} else if (!strcmp(str, "atan"))
push(atan(pop()) / angle_factor);
else if (!strcmp(str, "atan2")) {
temp = pop();
push(atan2(pop(), temp) / angle_factor);
} else if (!strcmp(str, "atanh")) {
temp = pop();
if (fabs(temp) < 1.0)
push(0.5 * log((1.0 + temp) / (1.0 - temp)));
else
error(15);
} else if (!strcmp(str, "au"))
push(AU);
else if (!strcmp(str, "beep"))
printf("\a");
else if (!strcmp(str, "c"))
push(SPEED_OF_LIGHT);
else if (!strcmp(str, "clrstk"))
sp = -1;
else if (!strcmp(str, "cm>in"))
push(pop() / IN_CM);
else if (!strcmp(str, "cnr")) {
itemp = Round(pop());
itemp2 = Round(pop());
if ((itemp >= 0) && (itemp2 >= 0) && (itemp <= itemp2)) {
temp = 1.0;
for (i = itemp2, j_local = (itemp2 - itemp); j_local >= 1; i--, j_local--)
temp *= (double) i / (double) j;
push(temp);
} else
error(23);
} else if (!strcmp(str, "cont"))
charpos = envstack[esp].charpos;
else if (!strcmp(str, "cos"))
push(cos(pop() * angle_factor));
else if (!strcmp(str, "cosh"))
push(cosh(pop()));
else if (!strcmp(str, "cube")) {
temp = pop();
push(temp * temp * temp);
} else if (!strcmp(str, "cubert")) {
temp = pop();
if (temp > 0.0)
push(pow(temp, 1.0 / 3.0));
else if (!compare_eps(temp, 0, COMPARE_EPS))
push(0.0);
else
error(30);
} else if (!strcmp(str, "c>f"))
push(pop() * 9.0 / 5.0 + 32.0);
else if (!strcmp(str, "deg"))
angle_factor = PI / 180.0;
else if (!strcmp(str, "dom")) {
t = time(NULL);
systime = localtime( & t);
push((double) systime -> tm_mday);
} else if (!strcmp(str, "dow")) {
t = time(NULL);
systime = localtime( & t);
push((double)(systime -> tm_wday + 1));
} else if (!strcmp(str, "doy")) {
t = time(NULL);
systime = localtime( & t);
push((double)(systime -> tm_yday + 1));
} else if (!strcmp(str, "drop"))
pop();
else if (!strcmp(str, "dup")) {
temp = pop();
push(temp);
push(temp);
} else if (!strcmp(str, "d>r"))
push(pop() * PI / 180.0);
else if (!strcmp(str, "e"))
push(ELEMENTARY_CHG);
else if (!strcmp(str, "eex")) {
temp = pop();
push(pop() * pow(10.0, temp));
} else if (!strcmp(str, "eps0"))
push(PERMITTIVITY);
else if (!strcmp(str, "exit"))
done = 1;
else if (!strcmp(str, "exp"))
push(exp(pop()));
else if (!strcmp(str, "fact")) {
ntemp = Round(pop());
if (ntemp >= 0) {
temp = 1.0;
for (i = 2; i <= ntemp; i++)
temp *= (double) i;
push(temp);
} else
error(21);
} else if (!strcmp(str, "fclose"))
fclose(fp[Round(pop())]);
else if (!strcmp(str, "feof"))
push(feof(fp[Round(pop())]) ? 1 : 0);
else if (!strcmp(str, "fix")) {
display_mode = 0;
display_digits = Round(pop());
} else if (!strcmp(str, "fopen")) {
itemp = Round(pop());
itemp2 = Round(pop());
sprintf(filenum_str, "%03ld", itemp2);
strcpy(filename_str, "mouse.");
strcat(filename_str, filenum_str);
switch ((int) itemp) {
case 0:
strcpy(filemode_str, "r");
break;
case 1:
strcpy(filemode_str, "w");
break;
case 2: