mirror of
https://github.com/reactos/reactos.git
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452 lines
6.8 KiB
C
452 lines
6.8 KiB
C
/* Copyright 1998 DJ Delorie <dj@delorie.com>
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Distributed under the terms of the GNU GPL
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http://www.delorie.com/store/hcalc/
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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extern void set_bits(int);
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extern void set_string(char *);
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extern void do_exit(int);
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#ifdef GNUC
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#define longlong long long
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#else
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#define longlong __int64
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#define XBell(d,v) 1
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#endif
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char pending_op = 0;
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int making_number = 0;
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int base = 10;
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#define MAXIN 40
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char input_buf[MAXIN];
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int iptr;
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double value, saved, stored=0;
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void
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convert_number()
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{
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char *ip = input_buf;
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double scale = 1;
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int sign = +1;
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if (*ip == '-')
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sign = -1;
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value = 0;
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while (*++ip)
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{
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if (*ip == '.')
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break;
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if (*ip >= '0' && *ip <= '9')
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{
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value *= base;
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value += *ip-'0';
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}
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if (*ip >= 'a' && *ip <= 'f')
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{
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value *= base;
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value += *ip-'a'+10;
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}
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}
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if (*ip)
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while (*++ip)
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{
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if (*ip >= '0' && *ip <= '9')
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{
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scale *= base;
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value += (*ip-'0')/scale;
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}
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if (*ip >= 'a' && *ip <= 'f')
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{
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scale *= base;
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value += (*ip-'a'+10)/scale;
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}
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}
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value *= sign;
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}
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void
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show_value()
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{
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char tmp[20], *tp;
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char commas[40], *cp, *dp;
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double v = value;
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if (base == 2)
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{
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int q = (unsigned int)((longlong)v & 0xffffffffL);
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set_bits(q);
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return;
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}
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tmp[0] = ' ';
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if (v < 0)
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{
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tmp[0] = '-';
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v = -v;
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}
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if (base == 10)
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{
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sprintf(tmp+1, "%.14G", v);
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if (strchr(tmp+1, 'E'))
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sprintf(tmp+1, "%.9G", v);
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if (tmp[14] == '.')
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tmp[14] = 0;
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}
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else
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{
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static char tohex[] = "0123456789ABCDEF";
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longlong ll = (longlong)v;
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char *revptr;
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tp = tmp+1;
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if (base == 16)
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{
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*tp++ = '0';
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*tp++ = 'x';
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}
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else if (base == 8)
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*tp++ = '0';
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revptr = tp;
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do {
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*tp++ = tohex[ll%base];
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ll /= base;
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} while (ll);
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*tp-- = 0;
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while (revptr < tp) {
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char t = *revptr;
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*revptr = *tp;
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*tp = t;
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tp--;
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revptr++;
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}
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}
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cp = commas+40;
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tp = tmp+strlen(tmp);
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dp = strchr(tmp, '.');
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if (dp == 0)
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dp = tp;
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*--cp = 0;
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while (tp>=tmp)
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{
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*--cp = *tp--;
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switch (base)
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{
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case 10:
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if (isdigit(cp[0]) && isdigit(cp[1]) && isdigit(cp[2]) && tp<dp
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&& tp>=tmp && isdigit(*tp))
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*--cp = ',';
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break;
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case 16:
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if (isxdigit(cp[0]) && isxdigit(cp[1])
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&& isxdigit(cp[2]) && isxdigit(cp[3])
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&& tp>=tmp && isxdigit(*tp))
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*--cp = ',';
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break;
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}
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}
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if (strlen(cp) > 15)
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set_string(tmp);
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else
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set_string(cp);
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}
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void
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end_number()
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{
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if (!making_number)
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return;
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making_number = 0;
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iptr = 0;
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switch (pending_op)
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{
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case '+':
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value = saved + value;
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break;
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case '-':
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value = saved - value;
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break;
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case '*':
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value = saved * value;
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break;
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case '/':
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value = saved / value;
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break;
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case '&':
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value = (double)((longlong)saved & (longlong)value);
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break;
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case '|':
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value = (double)((longlong)saved | (longlong)value);
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break;
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case '^':
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value = (double)((longlong)saved ^ (longlong)value);
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break;
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case 'S':
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if (value < 0)
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value = (double)((longlong)saved >> (longlong)(-value));
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else
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value = (double)((longlong)saved << (longlong)value);
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break;
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}
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saved = value;
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pending_op = 0;
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show_value();
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}
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void
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start_number()
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{
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if (making_number)
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return;
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iptr = 1;
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input_buf[0] = ' ';
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input_buf[1] = 0;
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making_number = 1;
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}
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void
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key(char c)
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{
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int v = c;
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/* printf("key %c\n", c); */
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switch (c)
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{
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case 27:
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making_number = 0;
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iptr = 0;
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pending_op = 0;
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value = saved = 0;
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set_string("");
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break;
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case 'u':
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if (making_number)
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{
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making_number = 0;
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set_string("");
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}
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break;
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case 'a':
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case 'b':
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case 'c':
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case 'd':
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case 'e':
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case 'f':
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v = c - 'a' - '9' - 1;
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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v -= '0';
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if (v >= base || iptr == MAXIN-1)
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XBell(display, 0);
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else
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{
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start_number();
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input_buf[iptr++] = c;
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input_buf[iptr] = 0;
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convert_number();
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show_value();
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}
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break;
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case '.':
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if (strchr(input_buf, '.'))
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{
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XBell(display, 0);
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break;
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}
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case ',':
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if (iptr == 1 || iptr == MAXIN-1)
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XBell(display, 0);
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else
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{
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start_number();
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input_buf[iptr++] = c;
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input_buf[iptr] = 0;
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convert_number();
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show_value();
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}
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break;
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case 8:
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if (iptr == 1)
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XBell(display, 0);
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else
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{
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input_buf[--iptr] = 0;
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convert_number();
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show_value();
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}
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break;
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case '_': /* +/- */
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if (making_number)
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{
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if (input_buf[0] == '-')
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input_buf[0] = ' ';
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else
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input_buf[0] = '-';
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convert_number();
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show_value();
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}
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else
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{
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value *= -1.0;
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saved *= -1.0;
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show_value();
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}
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break;
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case 'D':
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end_number();
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base = 10;
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show_value();
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break;
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case 'H':
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end_number();
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base = 16;
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show_value();
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break;
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case 'O':
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end_number();
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base = 8;
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show_value();
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break;
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case 'B':
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end_number();
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base = 2;
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show_value();
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break;
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case 'x':
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c = '*';
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case '+':
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case '-':
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case '*':
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case '/':
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case '^':
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case '&':
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case '|':
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case 'S':
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case '=':
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end_number();
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pending_op = c;
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break;
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case 13:
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case 10:
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end_number();
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break;
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case '~':
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end_number();
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value = (double)(~(longlong)value);
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show_value();
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break;
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case '<':
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end_number();
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value = (double)((longlong)value << 1);
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show_value();
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break;
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case '>':
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end_number();
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value = (double)((longlong)value >> 1);
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show_value();
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break;
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case '[': /* STO */
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stored = value;
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break;
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case ']': /* RCL */
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value = stored;
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show_value();
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making_number = 1;
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iptr = 1;
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input_buf[0] = ' ';
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break;
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case '}': /* SUM */
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stored += value;
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break;
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case 'P': /* click on the display itself */
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break;
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}
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}
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static char *bmap[] = {
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"PPPP\033",
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"DHOB\010",
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"[]}<>",
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"Sdef/",
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"~abc*",
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"|789-",
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"&456+",
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"^123=",
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"u0._="
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};
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#if 0
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void
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copy()
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{
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XSetSelectionOwner(display, XA_PRIMARY, window, event.xbutton.time);
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}
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void
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paste()
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{
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XConvertSelection(display, XA_PRIMARY, XA_STRING, paste_atom, window,
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event.xbutton.time);
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}
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void
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complete_paste(char *s, int n)
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{
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int i;
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for (i=0; i<n; i++)
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key(s[i]);
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}
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#endif
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void
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button(int b, int x, int y)
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{
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x = (x-2)/24;
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if (x < 0) x = 0;
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if (x > 4) x = 4;
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y = (y-1)/16;
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if (y < 0) y = 0;
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if (y > 8) y = 8;
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if (bmap[y][x] == 27 && b == 3)
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do_exit(0);
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#if 0
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if (bmap[y][x] == 'P' && b == 1)
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copy();
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if (bmap[y][x] == 'P' && b != 1)
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paste();
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#endif
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key(bmap[y][x]);
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}
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