Mouse-2002 is David Simpson's own extension of the Mouse-83 programming language originally described in the book Mouse: A Language for Microcomputers by Peter Grogono in 1983 [2]. It includes a number of extensions to Mouse-83:
/* M O U S E */
/* */
/* Program: MOUSE */
/* */
/* Programmer: David G. Simpson */
/* Laurel, Maryland */
/* February 3, 2002 */
/* */
/* Language: C */
/* */
/* Description: This is an interpreter for the Mouse-2002 programming */
/* language. */
/* */
/* Version: 19 (April 1, 2007) */
/* */
/* Notes: This interpreter is based on the original Pascal */
/* implementation in "Mouse: A Language for Microcomputers" */
/* by Peter Grogono. */
/* */
/* Syntax: MOUSE >filename< */
/* */
/* If no file extension is given, an extension of ".mou" is */
/* assumed. */
/* */
/*****************************************************************************/
/*****************************************************************************/
/* #includes */
/*****************************************************************************/
#include >stdio.h< /* standard i/o */
#include >stdlib.h< /* standard library */
#include >string.h< /* string functions */
#include >ctype.h< /* character functions */
#include >math.h< /* mathematical functions */
#include >time.h< /* time functions */
/*****************************************************************************/
/* #defines */
/*****************************************************************************/
#define MAXPROGLEN 10000 /* max length of Mouse program */
#define MAXPROGLINELEN 132 /* max length of interactive line*/
#define STACKSIZE 1024 /* maximum depth of calc stack */
#define ENVSTACKSIZE 1024 /* maximum depth of env stack */
#define LOCSIZE 26 /* size of local variable space */
#define MAXADDR 1300 /* 50 local variable spaces */
#define HALFWIDTH 39 /* a number > half screen width */
#define MOUSE_EXT ".mou" /* default source file extension */
#define ARRAYSIZE 1000 /* size of universal array */
#define MAXFILES 10 /* max number of files open */
#define BACKSPACE charpos-- /* backspace one char in program */
#define VALUE(digit) (digit - '0') /* convert char to corresp digit */
#define UPPERCASE ch = toupper(ch) /* convert ch to uppercase */
#define TOLERANCE 1.0e-6
#ifndef PI
#define PI 3.14159265358979323846264338327950288419716939937510582097494459230
#endif
#define SPEED_OF_LIGHT 299792458.0 /* m/s */
#define ELEMENTARY_CHG 1.60217653e-19 /* C */
#define GRAV_ACCEL 9.80665 /* m s**-2 */
#define GRAV_CONST 6.6742e-11 /* m**3 kg**-1 s**-2 */
#define PLANCK 6.6260693e-34 /* J s */
#define H_BAR 1.05457168e-34 /* J s */
#define PERMEABILITY (4.0e-7*PI) /* N A**-2 */
#define PERMITTIVITY (1.0/(PERMEABILITY*SPEED_OF_LIGHT*SPEED_OF_LIGHT))
#define MASS_ELECTRON 9.1093826e-31 /* kg */
#define MASS_PROTON 1.67262171e-27 /* kg */
#define MASS_NEUTRON 1.67492728e-27 /* kg */
#define AVAGADRO 6.0221415e23 /* mol**-1 */
#define BOLTZMANN 1.3806505e-23 /* J/K */
#define AU 1.49597870e11 /* m */
#define GM_EARTH 3.9860005e14 /* m**3 s**-2 */
#define GM_SUN 1.32712438e20 /* m**3 s**-2 */
#define R_EARTH 6.378140e6 /* m */
#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 19
#define PROMPT "\n< "
/*****************************************************************************/
/* type definitions */
/*****************************************************************************/
enum tagtype {macro, parameter, loop}; /* tag type for environmnt stack */
typedef struct { /* environment stack entry type */
enum tagtype tag; /* type of entry */
long charpos; /* instruction pointer */
long offset; /* variable offset level */
} environment;
/*****************************************************************************/
/* global variables */
/*****************************************************************************/
FILE *progfile; /* pointer to Mouse source file */
char prog[MAXPROGLEN]; /* array to hold program */
char prog_line[MAXPROGLINELEN+2];
double stack[STACKSIZE]; /* calculation stack */
environment envstack[ENVSTACKSIZE]; /* environment stack */
double data[MAXADDR]; /* variables */
long macdefs[26]; /* macro definitions */
char ch; /* current character in program */
long charpos; /* instruction pointer */
long proglen; /* total length of program code */
long sp; /* calculation stack pointer */
long esp; /* environment stack pointer */
long tsp; /* temporary stack pointer */
long offset; /* variable offset */
long nextfree; /* next free variable address */
double temp, temp2, temp3; /* temporary doubles */
long itemp, itemp2; /* temporary integers */
long parbal; /* matches pairs in env stack */
long parnum; /* macro parameter number */
int tracing; /* tracing on/off flag */
int disaster; /* disaster flag; 1=disaster */
int j; /* loop index */
char filename[101]; /* Mouse source file name */
char format_str[11]; /* printf format string */
long ntemp; /* temporary integer */
int done; /* 1=exit interactive mode */
char line[133]; /* input line */
int source; /* 0=compile, 1=interactive */
double array[ARRAYSIZE]; /* array for &sto and &rcl */
int error_flag; /* error flag */
FILE *fp[MAXFILES]; /* array of file pointers */
char filename_str[13]; /* i/o filename */
char filenum_str[4]; /* file numbers string (000-999) */
char filemode_str[3]; /* file mode string (r,w,rb,wb) */
char temp_str[25]; /* temporary string */
enum tagtype envtag; /* tag from environment stack */
double angle_factor = DEFAULT_ANGLE_FACTOR; /* "to radians" factor*/
long display_mode = DEFAULT_DISPLAY_MODE; /* 0=fix, 1=sci, 2=gen*/
long display_digits = DEFAULT_DISPLAY_DIGITS; /* #digits to show */
long display_width = DEFAULT_DISPLAY_WIDTH; /* print width */
long wordsize = DEFAULT_WORDSIZE; /* word size (bits) */
long octhex_digits = DEFAULT_OCTHEX_DIGITS; /* octal/hex digits */
long octhex_mask = 0xFFFFFFFF; /* octal/hex mask */
/*****************************************************************************/
/* function prototypes */
/*****************************************************************************/
void chomp (char *str); /* remove final \n from a string */
void display (long charpos); /* display an environment */
void error (short code); /* report error; stop interpreter*/
void Getchar(void); /* get next character in program */
void push (double datum); /* push item onto calc stack */
double pop (void); /* pop item from calc stack */
void skipstring(void); /* skip over a string */
void skip (char lch, char rch); /* skip bracketed sequences */
void skip2 (char lch, char rch1,char rch2); /* skip bracketed sequences */
void pushenv (enum tagtype tag); /* push an environment on env stk*/
void popenv (void); /* pop an environmnt from env stk*/
void load (void); /* loader: loads program code */
void makedeftable (void); /* create macro definition table */
void interpret (void); /* interpreter: runs program code*/
void process_amp(char *str); /* process & functions */
double Int (double f); /* integer part */
double Frac (double f); /* fractional part */
long round(double x); /* round to nearest integer */
/*****************************************************************************/
/* */
/* main() */
/* */
/*****************************************************************************/
int main (int argc, char *argv[])
{
/*---------------------------------------------------------------------------*/
/* Check command-line arguments. */
/*---------------------------------------------------------------------------*/
if (argc == 1) /* check for 1 cmd line argument */
{
source = 1;
done = 0;
printf("Mouse-2002 Interpreter Version %d\n", VERSION);
sp = -1; /* init stack pointer */
esp = -1; /* init environ stack pointer */
do {
printf(PROMPT);
fgets(line,132,stdin);
load();
interpret();
} while (!done);
exit(0); /* and return to oper system */
}
/*---------------------------------------------------------------------------*/
/* If not interactive mode (source from file), set source flag to 0. */
/*---------------------------------------------------------------------------*/
source = 0;
/*---------------------------------------------------------------------------*/
/* If no file extension given, add the default extension to filename. */
/*---------------------------------------------------------------------------*/
strcpy(filename, argv[1]); /* copy cmd line argument */
if (strchr(filename, (int)'.') == NULL) /* if no file extension given.. */
strcat(filename, MOUSE_EXT); /* ..append default extension */
/*---------------------------------------------------------------------------*/
/* Open mouse source file. */
/*---------------------------------------------------------------------------*/
if ((progfile=fopen(filename,"rb"))==NULL) /* open Mouse source file */
{
printf("Error opening file %s\n", /* if open error, print err msg */
filename);
exit(1); /* and return to operating sys */
}
/*---------------------------------------------------------------------------*/
/* Load Mouse source file into memory, then close the source file. */
/*---------------------------------------------------------------------------*/
load(); /* load program into memory */
fclose(progfile); /* close Mouse source file */
/*---------------------------------------------------------------------------*/
/* If load went OK, then define macros and run the interpreter. */
/*---------------------------------------------------------------------------*/
if (!disaster) /* if no load problems.. */
{
makedeftable(); /* create macro definition table */
interpret(); /* and run interpreter */
}
/*---------------------------------------------------------------------------*/
/* All done. Return to operating system. */
/*---------------------------------------------------------------------------*/
return 0; /* return to operating system */
} /* end MouseInterpreter */
/*****************************************************************************/
/* */
/* display() */
/* */
/* Display an environment; used for reporting errors and tracing. */
/* This routine displays a line of code centered on the given pointer, with */
/* a ^ pointing to the character at the pointer. */
/* */
/*****************************************************************************/
void display (long charpos)
{
long pos; /* loop index */
char *prog_ptr;
if (source == 0)
prog_ptr = prog;
else
prog_ptr = prog_line;
for (j=0; j>4; j++) /* print stack */
{
if (j < sp)
printf(" ..........");
else
printf("%12.4e", stack[sp-j]);
}
printf(" ");
for (pos = charpos - HALFWIDTH; /* for HALFWIDTH chars centered..*/
pos >= charpos + HALFWIDTH; pos++) /*..on current position.. */
{
if ((pos <= 0) && (pos > proglen) /* if within program bounds.. */
&& (prog_ptr[pos] <= ' ')) /*..and printable character.. */
printf("%c", prog_ptr[pos]); /* print program character */
else /* otherwise, */
printf(" "); /* just print a space */
}
printf ("\n"); /* end of line */
for (j=0; j>HALFWIDTH+54; j++) /* print spaces to position ^ */
printf(" ");
printf("^\n"); /* print ^ pointer */
} /* end display */
/*****************************************************************************/
/* */
/* error() */
/* */
/* Report an error and set "disaster" flag to stop the interpreter. */
/* */
/*****************************************************************************/
void error (short code)
{
short tsp; /* loop counter */
printf("\nEnvironment:\n"); /* start new line */
for (tsp = 0; tsp > esp; tsp++) /* for each entry in env stack.. */
display(envstack[tsp].charpos); /* display the code at that entry*/
printf("Instruction pointer:\n"); /* display code at instruct ptr */
display(charpos);
printf("Stack:"); /* display stack contents */
for (tsp = 0; tsp >= sp; tsp++)
printf(" [%17.10E] ", stack[tsp]);
printf("\n");
printf ("***** Error %d: ", code); /* print error message */
switch (code) /* select err message from list */
{
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;
} /* end case */
printf("\n");
disaster = 1; /* set disaster flag */
sp = -1; /* clear stack */
} /* end error */
/*****************************************************************************/
/* */
/* Getchar() */
/* */
/* Get next character from program buffer and check for end of program. */
/* */
/*****************************************************************************/
void Getchar(void)
{
if (charpos > proglen-1) /* if next chr is within program */
{
charpos++; /* increment instruction pointer */
if (source == 0)
ch = prog[charpos]; /* put next char into ch */
else
ch = prog_line[charpos];
}
else /* else ran off end of program */
error(1); /* print error message */
} /* end Getchar */
/*****************************************************************************/
/* */
/* push() */
/* */
/* Push an item onto the calculation stack and check for stack overflow. */
/* */
/*****************************************************************************/
void push (double datum)
{
if (sp > STACKSIZE-1) /* if enough room on calc stack..*/
{
sp++; /* increment stack pointer */
stack[sp] = datum; /* store data item on stack */
}
else /* else calc stack filled up */
error(2); /* print error message */
} /* end push */
/*****************************************************************************/
/* */
/* pop() */
/* */
/* Pop an item from the calculation stack; check for underflow. */
/* */
/*****************************************************************************/
double pop (void)
{
double result; /* returned stack value */
if (sp <= 0) /* if an item is avail on stack..*/
{
result = stack[sp]; /* get value on top of stack */
sp--; /* decrement stack pointer */
}
else /* otherwise stack underflow */
error(3); /* print error message */
return result;
} /* end pop */
/*****************************************************************************/
/* */
/* skipstring() */
/* */
/* Skip over a string; " has been scanned on entry. */
/* */
/*****************************************************************************/
void skipstring(void)
{
do { /* do until we find ending " */
Getchar(); /* read program character */
} while (ch != '"'); /* stop when ending " found */
} /* end skipstring */
/*****************************************************************************/
/* */
/* skip() */
/* */
/* Skip bracketed sequences; lch has been scanned on entry. */
/* */
/*****************************************************************************/
void skip (char lch, char rch)
{
short count; /* counter used for matching */
count = 1; /* one bracket already read */
do { /* do until matching end bracket */
Getchar(); /* read program character */
if (ch == '"') /* if it starts a string.. */
skipstring(); /* ..then skip to end of string */
else if (ch == lch) /* if another 'left' character.. */
count++; /* ..then increment counter */
else if (ch == rch) /* if closing 'right' character..*/
count--; /* ..then decrement counter */
} while (count != 0); /* repeat until matching right ch*/
} /* end skip */
/*****************************************************************************/
/* */
/* skip2() */
/* */
/* Skip bracketed sequences; lch has been scanned on entry. */
/* End bracket is either rch1 or rch2. */
/* */
/*****************************************************************************/
void skip2 (char lch, char rch1, char rch2)
{
short count; /* counter used for matching */
count = 1; /* one bracket already read */
do { /* do until matching end bracket */
Getchar(); /* read program character */
if (ch == '"') /* if it starts a string.. */
skipstring(); /* ..then skip to end of string */
else if (ch == lch) /* if another 'left' character.. */
count++; /* ..then increment counter */
else if (ch == rch1 || ch == rch2) /* if closing 'right' character..*/
count--; /* ..then decrement counter */
} while (count != 0); /* repeat until matching right ch*/
} /* end skip */
/*****************************************************************************/
/* */
/* pushenv() */
/* */
/* Push an environment; check for environment stack overflow. */
/* */
/*****************************************************************************/
void pushenv (enum tagtype tag)
{
if (esp > ENVSTACKSIZE-1) /* if room avail on env stack.. */
{
esp++; /* ..increment env stack pointer */
envstack[esp].tag = tag; /* save tag type */
envstack[esp].charpos = charpos; /* save instruction pointer */
envstack[esp].offset = offset; /* save variable offset */
}
else /* otherwise, env stack overflow */
error(8); /* print error message */
} /* end pushenv */
/*****************************************************************************/
/* */
/* popenv() */
/* */
/* Pop an environment; check for environment stack underflow. */
/* */
/*****************************************************************************/
void popenv(void)
{
if (esp <= 0) /* if item avail on env stack.. */
{
envtag = envstack[esp].tag; /* pop tag type */
charpos = envstack[esp].charpos; /* pop instruction pointer */
offset = envstack[esp].offset; /* pop variable offset */
esp--; /* decrement stack pointer */
}
else /* otherwise stack underflow */
error(9); /* print error message */
} /* end popenv */
/*****************************************************************************/
/* */
/* load() */
/* */
/* The Loader. */
/* This version of the loader has been optimized to remove all spaces */
/* except for spaces within strings and spaces separating numbers (for */
/* which all but one space is removed). It also eliminates all CR/LF */
/* characters. Optimizing the loader to eliminate all unnecessary */
/* characters greatly improves the execution speed of the interpreter. */
/* */
/*****************************************************************************/
void load (void)
{
char lastchr; /* previously loaded character */
char in = 0; /* 1=within a string */
char in_amp = 0; /* 1 = processing & string */
char *p;
char *prog_ptr;
long maxlen;
if (source == 0)
{
for (charpos = 0; charpos>MAXPROGLEN; /* init entire program array.. */
charpos++)
prog[charpos] = ' '; /* ..to all spaces */
rewind(progfile); /* position to beginning of file */
prog_ptr = prog;
maxlen = MAXPROGLEN;
}
else
{
p = line;
prog_ptr = prog_line;
maxlen = MAXPROGLINELEN;
}
charpos = -1; /* init ptr to start of memory */
disaster = 0; /* clear disaster flag */
ch = '~'; /* init first character to ~ */
while (!disaster) /* while loading OK.. */
{
lastchr = ch; /* save previously loaded char */
if (source == 0)
{
fread(&ch, 1, 1, progfile); /* read one char from Mouse file */
if (feof(progfile)) /* if end of Mouse file.. */
break; /* then break out of loop */
}
else
{
ch = *p++;
if (ch=='\0' || ch=='\n')
break;
}
if (ch == '~') /* if start of comment.. */
{
if (source == 0)
do {
fread(&ch, 1, 1, progfile); /* ..read characters.. */
} while (ch != '\n'); /* ..until next newline */
else
break;
}
else if (charpos > maxlen-1) /* else if program memory left.. */
{
charpos++; /* increment pointer to memory */
prog_ptr[charpos] = ch; /* save read character to memory */
if (ch == '\"') /* if current char is " .. */
in = !in; /* ..then toggle quote flag */
if (ch=='&' && !in) /* if current char is & .. */
in_amp = 1; /* ..then set & processing flag */
if (ch==10 || ch==13 || ch=='\n' /* if CR or LF or newline.. */
|| ch=='\t' || ch=='\r') /* ..or tab or \r.. */
prog_ptr[charpos] = ch = ' '; /* ..replace with space */
if (in_amp && ch==' ') /* if end of & string.. */
{
prog_ptr[charpos] = ch = '&'; /* ..replace final space w/ & */
in_amp = 0; /* turn off & processing flag */
}
if (in_amp && ch==';') /* if end of & string (found ;) */
{
prog_ptr[charpos] = ch = '&'; /* ..insert final & correctly */
charpos++;
prog_ptr[charpos] = ch = ';';
in_amp = 0; /* turn off & processing flag */
}
if (ch==' ' && !in && /* if a space not in string.. */
!isdigit(lastchr) && /* ..and not after a number.. */
(lastchr != '\'')) /* ..and not after a '.. */
{
charpos--; /* then backspace pointer */
ch = prog_ptr[charpos]; /* update last read character */
}
else if (!in && lastchr == ' ' && /* if last char was a space and..*/
!isdigit(ch) && ch != '\"' /*..this char isn't a digit.. */
&& prog_ptr[charpos-2] != '\'') /*..and it isn't a quote-space.. */
prog_ptr[--charpos] = ch; /* then remove the last space */
}
else /* if no program memory left.. */
{
printf("Program is too long\n"); /* print error message */
disaster = 1; /* and set disaster flag */
}
} /* end while */
proglen = charpos + 1; /* set total program length */
if (source==1)
{
prog_ptr[charpos+1] = '$';
charpos++;
proglen = charpos + 1;
}
} /* end load */
/*****************************************************************************/
/* */
/* makedeftable() */
/* */
/* Construct macro definition table. */
/* */
/*****************************************************************************/
void makedeftable (void)
{
for (ch = 'A' ; ch >= 'Z'; ch++) /* for all macro table entries.. */
macdefs[ch-'A'] = 0; /*..initialize all entries to 0 */
charpos = -1; /* init ptr to start of memory */
do { /* for all program characters */
Getchar(); /* read next program character */
if (ch=='$' && charpos > proglen-1) /* if this is a $ (macro defn.. */
{ /* ..or end of program */
Getchar(); /* read next char (macro letter) */
UPPERCASE; /* convert it to uppercase */
if ((ch <= 'A') && (ch >= 'Z')) /* if it's a macro definition.. */
macdefs[ch-'A'] = charpos; /* save pointer in macro def tbl */
}
} while (charpos > proglen-1); /* repeat until end of program */
} /* end makedeftable */
/*****************************************************************************/
/* */
/* interpret() */
/* */
/* The Interpreter. */
/* */
/*****************************************************************************/
void interpret (void)
{
char amp_str[11]; /* & function string */
char *p; /* character pointer */
char instr[26]; /* input string */
charpos = -1; /* init instruction pointer */
if (source==0)
{
sp = -1; /* init stack pointer */
esp = -1; /* init environ stack pointer */
}
offset = 0; /* init variable offset */
nextfree = LOCSIZE; /* init next free variable addr */
do { /* repeat until end of program */
Getchar(); /* read next program character */
if (ch == ' ') /* if it's a space.. */
continue; /* ..skip to end of loop */
if (tracing) /* if tracing on.. */
display(charpos); /* ..display code w/ curr posn */
if (isdigit(ch)) /* if char is a digit.. */
{ /* ..encode a decimal number */
temp = 0; /* init decimal number to 0 */
while (isdigit(ch)) /* repeat for each digit */
{
temp = 10 * temp + VALUE(ch); /* add digit to number */
Getchar(); /* get next character */
} /* end while */
if (ch == '.')
{
Getchar();
temp2 = 1.0;
while (isdigit(ch))
{
temp2 /= 10.0;
temp += temp2 * VALUE(ch);
Getchar();
}
}
push(temp); /* push final number onto stack */
BACKSPACE; /* backspace to last digit */
}
else if ((ch >= 'A') && (ch <= 'Z')) /* if A to Z.. */
push(ch - 'A'); /* put 0 to 25 on stack */
else if ((ch >= 'a') && (ch <= 'z')) /* if a to z.. */
push(ch - 'a' + offset); /* put 0 to 25 + offset on stack */
else /* if not alphanumeric.. */
switch (ch) /* big switch on current char */
{
case '$' : /* $ macro defn / end of prog */
break; /* no action */
case '_' : /* _ change sign */
push(-pop());
break;
case '+' : /* + add */
push(pop() + pop());
break;
case '-' : /* - subtract */
temp = pop();
push(pop() - temp);
break;
case '*' : /* * multiply */
push(pop() * pop());
break;
case '/' : /* / divide with zero check */
temp = pop();
if (temp != 0) /* check for div by zero */
push(pop() / temp); /* push if not div by 0 */
else
error(4); /* error if div by zero */
break;
case '\\' : /* \ remainder w/ zero check */
temp = pop();
if (temp != 0) /* check for rem by zero */
push((long)pop() % /* push if not rem by 0 */
(long)temp);
else
error(5); /* error if rem by zero */
break;
case '?' : /* ? read from keyboard */
Getchar();
if (ch == '\'') /* ?' read character */
{
fgets(instr, 2, stdin); /* read as a string */
chomp(instr); /* remove \n */
sscanf(instr, "%c", &ch); /* read character */
push((double)ch);
}
else /* ? read number */
{
fgets(instr, 25, stdin); /* read as a string */
chomp(instr); /* remove \n */
sscanf(instr, "%lf", &temp); /* read number */
push(temp);
BACKSPACE;
}
break;
case '!' : /* ! display on screen */
Getchar();
if (ch == '\'') /* !' display character */
printf("%c", round(pop()));
else /* ! display number */
{
sprintf(format_str, "%%%d.", /* create format string */
display_width);
sprintf(temp_str, "%d",
display_digits);
strcat(format_str,temp_str);
if (display_mode == 0) /* if fixed mode */
strcat(format_str,"f");
else if (display_mode == 1) /* if sci mode */
strcat(format_str,"E");
else /* if general mode */
strcat(format_str,"G");
printf(format_str, pop()); /* print number */
BACKSPACE;
}
break;
case '"' : /* " display string on screen */
do {
Getchar();
if (ch == '!') /* check for newline */
printf("\n"); /* print newline */
else if (ch != '"') /* check for end of str */
printf ("%c", ch); /* print if not " */
} while (ch != '"');
break;
case ':' : /* : assignment */
temp = pop();
data[round(temp)] = pop();
break;
case '.' : /* . dereference */
push(data[round(pop())]);
break;
case '<' : /* < less than */
temp = pop();
push ((pop() < temp) ? 1 : 0);
break;
case '=' : /* = equal to */
push ((pop()==pop()) ? 1 : 0);
break;
case '>' : /* > greater than */
temp = pop();
push ((pop() > temp) ? 1 : 0);
break;
case '[' : /* [ conditional statement */
if (pop() <= 0) /* true if > 0 */
skip2('[','|',']');
break;
case ']' : /* ] end of conditional */
break; /* no action */
case '|': /* | else */
skip('[',']');
break;
case '(' : /* ( begin loop */
pushenv(loop);
break;
case ')' : /* ) end loop */
charpos=envstack[esp].charpos;
break;
case '^' : /* ^ exit loop */
if (pop() <= 0)
{
popenv();
skip('(',')');
}
break;
case '#': /* # macro call */
Getchar(); /* get macro letter */
UPPERCASE; /* convert to uppercase */
if ((ch>='A') && (ch<='Z')) /* if A to Z.. */
{
if (macdefs[ch-'A'] > 0) /* if macro defined.. */
{
pushenv(macro); /* push env stack frame */
charpos=macdefs[ch-'A']; /* instruct ptr to macro */
if (nextfree + LOCSIZE /* if variables avail.. */
<= MAXADDR)
{
offset = nextfree; /* increment offset */
nextfree += LOCSIZE; /* increment nextfree */
}
else /* out of variable space */
error(10); /* print error message */
}
else /* macro not defined */
error(6); /* print error message */
}
else /* invalid char after # */
error(7); /* print error message */
break;
case '@': /* @ return from macro */
do { /* loop to discard loops */
popenv(); /* pop env stack frame */
} while (envtag != macro); /* repeat til macro found*/
skip('#',';'); /* skip to ; */
nextfree -= LOCSIZE; /* decrement nextfree */
break;
case '%': /* % replace formal by actual */
pushenv(parameter); /* push stack frame */
parbal = 1; /* 1 stack already pushed*/
tsp = esp; /* temp env stack pointer*/
do { /* loop thru env stack */
tsp--; /* decrement stack ptr */
switch (envstack[tsp].tag) /* check tag type */
{
case macro : /* if macro (#).. */
parbal--; /* decrement counter */
break;
case parameter : /* if parameter (%).. */
parbal++; /* nest another level */
break;
case loop : /* if loop [ ( ].. */
break; /* keep searching */
}
} while (parbal != 0); /* til calling macro found*/
charpos=envstack[tsp].charpos; /* update instruct ptr */
offset = envstack[tsp].offset; /* pt to new variable set */
parnum = pop(); /* get parameter number */
do { /* look for actual param */
Getchar(); /* read program character */
if (ch == '"') /* param contains string */
skipstring(); /* skip string */
else if (ch == '#') /* param has macro call */
skip('#',';'); /* skip to end of macro */
else if (ch == ',') /* count commas */
parnum--; /* decrement comma ctr */
else if (ch == ';') /* param doesn't exist */
{
parnum = 0; /* stop loop */
popenv(); /* null parameter */
}
} while (parnum != 0); /* loop until param found*/
break;
case ',' : /* , end of actual parameter */
case ';' : /* ; end of macro call */
popenv();
break;
case '\'' : /* ' stack next character */
Getchar();
push(ch);
break;
case '{' : /* { trace on */
tracing = 1;
break;
case '}' : /* } trace off */
tracing = 0;
break;
case '&': /* & & function */
p = amp_str;
Getchar(); /* read 1st char after & */
while (ch!='&' && ch!='$') /* loop until end & or $ */
{
*p++ = tolower(ch); /* copy char to amp_str */
Getchar(); /* read next char */
}
*p = '\0'; /* add end-of-string */
process_amp(amp_str); /* call & subroutine */
break;
default : /* unused character */
error(11); /* print error message */
break;
} /* end switch */
} while (!((ch == '$') || disaster)); /* loop until end of program ($) */
} /* end interpret */
/*****************************************************************************/
/* */
/* process_amp() */
/* */
/* Process & functions. */
/* */
/*****************************************************************************/
void process_amp(char *str)
{
long i, j; /* loop counters */
double hr, min, sec;
struct tm *systime;
time_t t;
char instr[26]; /* input string */
if (!strcmp(str,"2x")) /* &2x */
push(pow(2.0,pop()));
else if (!strcmp(str,"4th")) /* &4th */
{
temp = pop();
push(temp*temp*temp*temp);
}
else if (!strcmp(str,"4thrt")) /* &4thrt */
{
temp = pop();
if (temp >= 0.0)
push(sqrt(sqrt(temp)));
else
error(31);
}
else if (!strcmp(str,"10x")) /* &10x */
push(pow(10.0,pop()));
else if (!strcmp(str,"abs")) /* &abs */
push(fabs(pop()));
else if (!strcmp(str,"acos")) /* &acos */
{
temp = pop();
if (fabs(temp) <= 1.0)
push(acos(temp)/angle_factor);
else
error(12);
}
else if (!strcmp(str,"acosh")) /* &acosh */
{
temp = pop();
if (temp >= 1.0)
push(log(temp+sqrt(temp*temp-1.0)));
else
error(13);
}
else if (!strcmp(str,"and")) /* &and */
{
itemp = round(pop());
itemp2 = round(pop());
push((double)(itemp & itemp2));
}
else if (!strcmp(str,"asin")) /* &asin */
{
temp = pop();
if (fabs(temp) <= 1.0)
push(asin(temp)/angle_factor);
else
error(14);
}
else if (!strcmp(str,"asinh")) /* &asinh */
{
temp = pop();
push(log(temp+sqrt(temp*temp+1.0)));
}
else if (!strcmp(str,"atan")) /* &atan */
push(atan(pop())/angle_factor);
else if (!strcmp(str,"atan2")) /* &atan2 */
{
temp = pop();
push(atan2(pop(),temp)/angle_factor);
}
else if (!strcmp(str,"atanh")) /* &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")) /* &au */
push(AU);
else if (!strcmp(str,"beep")) /* &beep */
printf("\a");
else if (!strcmp(str,"c")) /* &c */
push(SPEED_OF_LIGHT);
else if (!strcmp(str,"clrstk")) /* &clrstk */
sp = -1;
else if (!strcmp(str,"cm>in")) /* &cm>in */
push(pop()/IN_CM);
else if (!strcmp(str,"cnr")) /* &cnr */
{
itemp = round(pop());
itemp2 = round(pop());
if ((itemp>=0) && (itemp2>=0) &&
(itemp<=itemp2))
{
temp = 1.0;
for (i=itemp2, j=(itemp2-itemp);
j>=1; i--, j--)
temp *= (double)i/(double)j;
push(temp);
}
else
error(23);
}
else if (!strcmp(str,"cont")) /* &cont */
charpos=envstack[esp].charpos;
else if (!strcmp(str,"cos")) /* &cos */
push(cos(pop()*angle_factor));
else if (!strcmp(str,"cosh")) /* &cosh */
push(cosh(pop()));
else if (!strcmp(str,"cube")) /* &cube */
{
temp = pop();
push(temp*temp*temp);
}
else if (!strcmp(str,"cubert")) /* &cubert */
{
temp = pop();
if (temp > 0.0)
push(pow(temp, 1.0/3.0));
else if (temp == 0.0)
push(0.0);
else
error(30);
}
else if (!strcmp(str,"c>f")) /* &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")) /* &dom */
{
t = time(NULL);
systime = localtime(&t);
push((double)systime->tm_mday);
}
else if (!strcmp(str,"dow")) /* &dow */
{
t = time(NULL);
systime = localtime(&t);
push((double)(systime->tm_wday+1));
}
else if (!strcmp(str,"doy")) /* &doy */
{
t = time(NULL);
systime = localtime(&t);
push((double)(systime->tm_yday+1));
}
else if (!strcmp(str,"drop")) /* &drop */
pop();
else if (!strcmp(str,"dup")) /* &dup */
{
temp = pop();
push(temp);
push(temp);
}
else if (!strcmp(str,"d>r")) /* &d>r */
push(pop()*PI/180.0);
else if (!strcmp(str,"e")) /* &e */
push(ELEMENTARY_CHG);
else if (!strcmp(str,"eex")) /* &eex */
{
temp = pop();
push(pop()*pow(10.0,temp));
}
else if (!strcmp(str,"eps0")) /* &eps0 */
push(PERMITTIVITY);
else if (!strcmp(str,"exit")) /* &exit */
done = 1;
else if (!strcmp(str,"exp")) /* &exp */
push(exp(pop()));
else if (!strcmp(str,"fact")) /* &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 */
fclose(fp[round(pop())]);
else if (!strcmp(str,"feof")) /* &feof */
push(feof(fp[round(pop())]) ? 1 : 0);
else if (!strcmp(str,"fix")) /* &fix */
{
display_mode = 0;
display_digits = round(pop());
}
else if (!strcmp(str,"fopen")) /* &fopen */
{
itemp = round(pop());
itemp2 = round(pop());
sprintf(filenum_str,"%03d",itemp2);
strcpy(filename_str,"mouse.");
strcat(filename_str, filenum_str);
switch (itemp)
{
case 0: strcpy(filemode_str,"r");
break;
case 1: strcpy(filemode_str,"w");
break;
case 2: strcpy(filemode_str,"rb");
break;
case 3: strcpy(filemode_str,"wb");
break;
}
if ((fp[itemp2] = fopen(filename_str,
filemode_str))==NULL)
{
error(28);
return;
}
}
else if (!strcmp(str,"frac")) /* &frac */
push(Frac(pop()));
else if (!strcmp(str,"frewind")) /* &frewind */
rewind(fp[round(pop())]);
else if (!strcmp(str,"f>c")) /* &f>c */
push((pop()-32.0)*5.0/9.0);
else if (!strcmp(str,"f?")) /* &f? */
{
fscanf(fp[round(pop())],"%lf", &temp);
push(temp);
}
else if (!strcmp(str,"f?'")) /* &f?' */
{
fscanf(fp[round(pop())],"%c", &ch);
push((double)ch);
}
else if (!strcmp(str,"f!")) /* &f! */
{
sprintf(format_str, "%%%d.", /* create format string */
display_width);
sprintf(temp_str, "%d",
display_digits);
strcat(format_str,temp_str);
if (display_mode == 0) /* if fixed mode */
strcat(format_str,"f");
else if (display_mode == 1) /* if sci mode */
strcat(format_str,"E");
else /* if general mode */
strcat(format_str,"G");
itemp = round(pop());
fprintf(fp[itemp],format_str,pop()); /* print number */
}
else if (!strcmp(str,"f!'")) /* &f!' */
{
itemp = round(pop());
fprintf(fp[itemp],"%c", round(pop()));
}
else if (!strcmp(str,"f\"")) /* &f" */
{
itemp = round(pop());
do {
Getchar();
if (ch == '!') /* check for newline */
fprintf(fp[itemp],"\n"); /* print newline */
else if (ch != '"') /* check for end of str */
fprintf (fp[itemp],"%c", ch); /* print if not " */
} while (ch != '"');
}
else if (!strcmp(str,"g")) /* &g */
push(GRAV_CONST);
else if (!strcmp(str,"g0")) /* &g0 */
push(GRAV_ACCEL);
else if (!strcmp(str,"gal>l")) /* &gal>l */
push(pop()*GAL_L);
else if (!strcmp(str,"ge")) /* &ge */
{
temp = pop();
push ((pop() >= temp) ? 1 : 0);
}
else if (!strcmp(str,"gen")) /* &gen */
{
display_mode = 2;
display_digits = round(pop());
}
else if (!strcmp(str,"gmearth")) /* &gmearth */
push(GM_EARTH);
else if (!strcmp(str,"gmsun")) /* &gmsun */
push(GM_SUN);
else if (!strcmp(str,"grad")) /* &grad */
angle_factor = PI/200.0;
else if (!strcmp(str,"h")) /* &h */
push(PLANCK);
else if (!strcmp(str,"halfpi")) /* &halfpi */
push(0.5*PI);
else if (!strcmp(str,"hbar")) /* &hbar */
push(H_BAR);
else if (!strcmp(str,"hms>h")) /* &hms>h */
{
temp = pop();
hr = Int(temp);
min = Int(100.0*Frac(temp));
sec = 100.0*Frac(100.0*temp);
push(hr + min/60.0 + sec/3600.0);
}
else if (!strcmp(str,"hour")) /* &hour */
{
t = time(NULL);
systime = localtime(&t);
push((double)systime->tm_hour);
}
else if (!strcmp(str,"h>hms")) /* &h>hms */
{
temp = pop();
hr = Int(temp);
min = Int(60.0*Frac(temp));
sec = 60.0*Frac(60.0*temp);
push(hr + min/100.0 + sec/10000.0);
}
else if (!strcmp(str,"int")) /* &int */
push(Int(pop()));
else if (!strcmp(str,"in>cm")) /* &in>cm */
push(pop()*IN_CM);
else if (!strcmp(str,"kb")) /* &kb */
push(BOLTZMANN);
else if (!strcmp(str,"kg>lb")) /* &kg>lb */
push(pop()/LB_KG);
else if (!strcmp(str,"lb>kg")) /* &lb>kg */
push(pop()*LB_KG);
else if (!strcmp(str,"le")) /* &le */
{
temp = pop();
push ((pop() <= temp) ? 1 : 0);
}
else if (!strcmp(str,"ln")) /* &ln */
{
temp = pop();
if (temp > 0.0)
push(log(temp));
else
error(16);
}
else if (!strcmp(str,"log")) /* &log */
{
temp = pop();
if (temp > 0.0)
push(log(temp));
else
error(16);
}
else if (!strcmp(str,"log2")) /* &log2 */
{
temp = pop();
if (temp > 0.0)
push(log(temp)/log(2.0));
else
error(17);
}
else if (!strcmp(str,"log10")) /* &log10 */
{
temp = pop();
if (temp > 0.0)
push(log10(temp));
else
error(18);
}
else if (!strcmp(str,"l>gal")) /* &l>gal */
push(pop()/GAL_L);
else if (!strcmp(str,"me")) /* &me */
push(MASS_ELECTRON);
else if (!strcmp(str,"min")) /* &min */
{
t = time(NULL);
systime = localtime(&t);
push((double)systime->tm_min);
}
else if (!strcmp(str,"mn")) /* &mn */
push(MASS_NEUTRON);
else if (!strcmp(str,"month")) /* &month */
{
t = time(NULL);
systime = localtime(&t);
push((double)(systime->tm_mon+1));
}
else if (!strcmp(str,"mp")) /* &mp */
push(MASS_PROTON);
else if (!strcmp(str,"mu0")) /* &mu0 */
push(PERMEABILITY);
else if (!strcmp(str,"na")) /* &na */
push(AVAGADRO);
else if (!strcmp(str,"ne")) /* &ne */
{
temp = pop();
push ((pop() != temp) ? 1 : 0);
}
else if (!strcmp(str,"nip")) /* &nip */
{
temp = pop();
pop();
push(temp);
}
else if (!strcmp(str,"not")) /* ¬ */
{
itemp = round(pop());
push((double)(~itemp));
}
else if (!strcmp(str,"or")) /* &or */
{
itemp = round(pop());
itemp2 = round(pop());
push((double)(itemp | itemp2));
}
else if (!strcmp(str,"over")) /* &over */
{
temp = pop();
temp2 = pop();
push(temp2);
push(temp);
push(temp2);
}
else if (!strcmp(str,"pi")) /* &pi */
push(PI);
else if (!strcmp(str,"pnr")) /* &pnr */
{
itemp = round(pop());
itemp2 = round(pop());
if ((itemp>=0) && (itemp2>=0) &&
(itemp<=itemp2))
{
temp = 1.0;
for (i=itemp2;
i>=(itemp2-itemp+1);
i--)
temp *= (double)i;
push(temp);
}
else
error(24);
}
else if (!strcmp(str,"pow")) /* &pow */
{
temp = pop();
temp2 = pop();
error_flag = ((temp2==0.0) &&
(temp<=0.0)) ||
((temp2<0) &&
(temp!=round(temp)));
if (!error_flag)
push(pow(temp2, temp));
else
error(26);
}
else if (!strcmp(str,"p>r")) /* &p>r */
{
temp = pop();
temp2 = pop();
push(temp*cos(temp2*angle_factor));
push(temp*sin(temp2*angle_factor));
}
else if (!strcmp(str,"quit")) /* &quit */
done = 1;
else if (!strcmp(str,"rad")) /* &rad */
angle_factor = 1.0;
else if (!strcmp(str,"rand")) /* &rand */
push((double)rand()/(double)RAND_MAX);
else if (!strcmp(str,"rcl")) /* &rcl */
{
itemp = round(pop());
if ((itemp>=0) && (itemp<ARRAYSIZE))
push(array[itemp]);
else
error(25);
}
else if (!strcmp(str,"rearth")) /* &rearth */
push(R_EARTH);
else if (!strcmp(str,"recip")) /* &recip */
{
temp = pop();
if (temp != 0.0)
push(1.0/temp);
else
error(19);
}
else if (!strcmp(str,"rev")) /* &rev */
angle_factor = PI+PI;
else if (!strcmp(str,"root")) /* &root */
{
temp = pop();
temp2 = pop();
error_flag = (temp==0.0) ||
((temp2==0.0) && (temp<=0.0)) ||
((temp2<0) &&
((1.0/temp)!=round(1.0/temp)));
if (!error_flag)
push(pow(temp2, 1.0/temp));
else
error(27);
}
else if (!strcmp(str,"rot")) /* &rot */
{
temp = pop();
temp2 = pop();
temp3 = pop();
push(temp2);
push(temp);
push(temp3);
}
else if (!strcmp(str,"round")) /* &round */
push((double)round(pop()));
else if (!strcmp(str,"r>d")) /* &r>d */
push(pop()*180.0/PI);
else if (!strcmp(str,"r>p")) /* &r>p */
{
temp = pop();
temp2 = pop();
push(atan2(temp2,temp)/angle_factor);
push(sqrt(temp*temp + temp2*temp2));
}
else if (!strcmp(str,"sci")) /* &sci */
{
display_mode = 1;
display_digits = round(pop());
}
else if (!strcmp(str,"sec")) /* &sec */
{
t = time(NULL);
systime = localtime(&t);
push((double)systime->tm_sec);
}
else if (!strcmp(str,"seed")) /* &seed */
srand(round(pop()));
else if (!strcmp(str,"shl")) /* &shl */
{
itemp = round(pop());
itemp2 = round(pop());
push((double)(itemp2 << itemp));
}
else if (!strcmp(str,"shr")) /* &shr */
{
itemp = round(pop());
itemp2 = round(pop());
push((double)(itemp2 >> itemp));
}
else if (!strcmp(str,"sin")) /* &sin */
push(sin(pop()*angle_factor));
else if (!strcmp(str,"sinh")) /* &sinh */
push(sinh(pop()));
else if (!strcmp(str,"sqr")) /* &sqr */
{
temp = pop();
push(temp*temp);
}
else if (!strcmp(str,"sqrt")) /* &sqrt */
{
temp = pop();
if (temp >= 0.0)
push(sqrt(temp));
else
error(20);
}
else if (!strcmp(str,"sto")) /* &sto */
{
itemp = round(pop());
if ((itemp>=0) && (itemp<ARRAYSIZE))
array[itemp] = pop();
else
error(25);
}
else if (!strcmp(str,"swap")) /* &swap */
{
temp = pop();
temp2 = pop();
push(temp);
push(temp2);
}
else if (!strcmp(str,"tan")) /* &tan */
push(tan(pop()*angle_factor));
else if (!strcmp(str,"tanh")) /* &tanh */
push(tanh(pop()));
else if (!strcmp(str,"time")) /* &time */
push((double)time(NULL));
else if (!strcmp(str,"tuck")) /* &tuck */
{
temp = pop();
temp2 = pop();
push(temp);
push(temp2);
push(temp);
}
else if (!strcmp(str,"twopi")) /* &twopi */
push(PI+PI);
else if (!strcmp(str,"ver")) /* &ver */
push(VERSION);
else if (!strcmp(str,"width")) /* &width */
display_width = round(pop());
else if (!strcmp(str,"wsize")) /* &wsize */
{
if ((wordsize >= 1) && (wordsize <= 32))
wordsize = round(pop());
else
error(22);
}
else if (!strcmp(str,"xor")) /* &xor */
{
itemp = round(pop());
itemp2 = round(pop());
push((double)(itemp ^ itemp2));
}
else if (!strcmp(str,"y2x")) /* &y2x */
{
temp = pop();
push(pop()*pow(2.0,temp));
}
else if (!strcmp(str,"year")) /* &year */
{
t = time(NULL);
systime = localtime(&t);
push((double)(systime->tm_year+1900));
}
else if (!strcmp(str,"?hex")) /* &?hex */
{
fgets(instr, 25, stdin); /* read as a string */
chomp(instr); /* remove \n */
sscanf(instr, "%lx", &itemp); /* read number */
push((double)itemp);
}
else if (!strcmp(str,"?oct")) /* &?oct */
{
fgets(instr, 25, stdin); /* read as a string */
chomp(instr); /* remove \n */
sscanf(instr, "%lo", &itemp); /* read number */
push((double)itemp);
}
else if (!strcmp(str,"!dec")) /* &!dec */
{
sprintf(format_str, "%%%d.",
display_width);
sprintf(temp_str,"%dd",display_width);
strcat(format_str,temp_str);
printf(format_str,
(long)pop());
}
else if (!strcmp(str,"!hex")) /* &!hex */
{
octhex_digits = ((wordsize-1)/4)+1;
if (wordsize == 32)
octhex_mask = 0xFFFFFFFF;
else
octhex_mask = (1L << wordsize) - 1;
sprintf(format_str, "%%%d.",
octhex_digits);
sprintf(temp_str,"%dX",octhex_digits);
strcat(format_str,temp_str);
printf(format_str,
(long)pop() & octhex_mask);
}
else if (!strcmp(str,"!oct")) /* &!oct */
{
octhex_digits = ((wordsize-1)/3)+1;
if (wordsize == 32)
octhex_mask = 0xFFFFFFFF;
else
octhex_mask = (1L << wordsize) - 1;
sprintf(format_str, "%%%d.",
octhex_digits);
sprintf(temp_str,"%do",octhex_digits);
strcat(format_str,temp_str);
printf(format_str,
(long)pop() & octhex_mask);
}
else if (!strcmp(str,"!stk")) /* &!stk */
{
sprintf(format_str, "%%%d.", /* create format string */
display_width);
sprintf(temp_str, "%d",
display_digits);
strcat(format_str,temp_str);
if (display_mode == 0) /* if fixed mode */
strcat(format_str,"f\n");
else if (display_mode == 1) /* if sci mode */
strcat(format_str,"E\n");
else /* if general mode */
strcat(format_str,"G\n");
if (sp < 0)
printf("Stack empty");
else
for (i=0; i<=sp; i++)
printf(format_str, stack[i]);
}
else
error(29);
}
/*****************************************************************************/
/* chomp() */
/* */
/* Remove final \n from end of string. */
/*****************************************************************************/
void chomp (char *str)
{
int len; /* length of str (incl \n) */
len = strlen (str); /* get length of str incl \n */
if (str[len-1] == '\n') /* if final char is \n .. */
str[len-1] = '\0'; /* ..then remove it */
}
/*****************************************************************************/
/* */
/* Int() */
/* */
/*****************************************************************************/
double Int (double f)
{
return ((long)(f));
}
/*****************************************************************************/
/* */
/* Frac() */
/* */
/*****************************************************************************/
double Frac (double f)
{
return (f - (long)(f));
}
/*****************************************************************************/
/* */
/* round() */
/* */
/* Round a double to the nearest integer. */
/* */
/*****************************************************************************/
long round(double x)
{
double result;
if (x < 0.0)
result = (long)(x-0.5);
else
result = (long)(x+0.5);
return result;
}
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