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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