2024-04-04 12:04:27 -04:00
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#include <stdio.h>
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2024-04-04 12:29:36 -04:00
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typedef struct {
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2024-04-27 17:47:06 -04:00
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unsigned int id, refs;
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char *a, *b;
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2024-04-04 12:29:36 -04:00
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} Rule;
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2024-04-27 17:47:06 -04:00
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static unsigned char rmin = 0xff, rmax = 0x00;
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2024-04-28 15:32:46 -04:00
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static int flip, quiet, debug, cycles = 0x10000;
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2024-04-25 15:17:31 -04:00
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static Rule rules[0x1000], *rules_ = rules, lambda;
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2024-04-24 18:17:57 -04:00
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static char dict[0x8000], *dict_ = dict, empty;
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2024-04-14 22:36:16 -04:00
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static char bank_a[0x4000], *src_ = bank_a;
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static char bank_b[0x4000], *dst_ = bank_b;
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2024-04-27 17:47:06 -04:00
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static char *regs[0x100];
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2024-04-23 22:36:49 -04:00
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2024-04-11 12:26:55 -04:00
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#define spacer(c) (c <= ' ' || c == '(' || c == ')')
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2024-04-04 19:52:09 -04:00
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2024-04-04 13:59:00 -04:00
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static char *
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walk(char *s)
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{
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char c;
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2024-04-04 22:40:16 -04:00
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int depth = 0;
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2024-04-12 13:30:59 -04:00
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if(*s == '(') {
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2024-04-04 22:37:03 -04:00
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while((c = *s++)) {
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if(c == '(') depth++;
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if(c == ')') --depth;
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if(!depth) return s;
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2024-04-04 20:26:16 -04:00
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}
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2024-04-04 14:35:58 -04:00
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}
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2024-04-08 18:08:22 -04:00
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while((c = *s) && !spacer(c)) s++;
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2024-04-04 20:15:16 -04:00
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return s;
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2024-04-04 13:59:00 -04:00
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}
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2024-04-28 22:45:46 -04:00
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static int
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sint(char *s)
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{
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char c;
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2024-04-29 12:08:41 -04:00
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int r = 0, n = 1;
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if(*s == '-') { n = -1, s++; }
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2024-04-28 23:37:53 -04:00
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while((c = *s++) && c > 0x20) r = r * 10 + c - '0';
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2024-04-29 12:08:41 -04:00
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return r * n;
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2024-04-28 22:45:46 -04:00
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}
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2024-04-28 21:55:03 -04:00
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static void
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device_write(char *s)
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{
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2024-04-28 23:07:41 -04:00
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char c = *s, *cap = walk(s), **reg = regs + '0';
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/* phase: ALU */
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if(*reg) {
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2024-04-29 00:23:27 -04:00
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int acc = sint(*reg++);
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2024-04-28 23:07:41 -04:00
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/* clang-format off */
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2024-04-28 23:13:51 -04:00
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switch(c) {
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2024-04-29 00:23:27 -04:00
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case '+': for(;*reg != 0; reg++) acc += sint(*reg); break;
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case '-': for(;*reg != 0; reg++) acc -= sint(*reg); break;
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case '*': for(;*reg != 0; reg++) acc *= sint(*reg); break;
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case '/': for(;*reg != 0; reg++) acc /= sint(*reg); break;
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case '%': for(;*reg != 0; reg++) acc %= sint(*reg); break;
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case '&': for(;*reg != 0; reg++) acc &= sint(*reg); break;
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case '^': for(;*reg != 0; reg++) acc ^= sint(*reg); break;
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case '|': for(;*reg != 0; reg++) acc |= sint(*reg); break;
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case '=': for(;*reg != 0; reg++) acc = acc == sint(*reg); break;
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case '!': for(;*reg != 0; reg++) acc = acc != sint(*reg); break;
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case '>': for(;*reg != 0; reg++) acc = acc > sint(*reg); break;
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case '<': for(;*reg != 0; reg++) acc = acc < sint(*reg); break;
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2024-04-28 22:45:46 -04:00
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}
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2024-04-28 23:13:51 -04:00
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/* clang-format on */
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2024-04-28 23:07:41 -04:00
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dst_ += snprintf(dst_, 0x10, "%d", acc);
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2024-04-28 22:45:46 -04:00
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return;
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}
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2024-04-28 23:07:41 -04:00
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/* phase: string */
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2024-04-28 21:55:03 -04:00
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if(*s == '(') s++, --cap;
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while(s < cap) {
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c = *s++;
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if(c == '\\') {
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switch(*s++) {
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case 't': putc(0x09, stdout); break;
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case 'n': putc(0x0a, stdout); break;
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case 's': putc(0x20, stdout); break;
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}
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} else
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putc(c, stdout);
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}
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}
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static void
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2024-04-28 23:07:41 -04:00
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device_read(void)
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2024-04-28 21:55:03 -04:00
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{
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2024-04-28 23:58:47 -04:00
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char c, *origin = dst_;
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2024-04-28 21:55:03 -04:00
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while(fread(&c, 1, 1, stdin) && c >= ' ')
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*dst_++ = c;
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if(feof(stdin))
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*dst_++ = 'E', *dst_++ = 'O', *dst_++ = 'F';
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2024-04-28 23:58:47 -04:00
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if(dst_ - origin == 0)
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dst_--;
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2024-04-28 21:55:03 -04:00
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}
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2024-04-25 21:36:45 -04:00
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static void
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2024-04-22 20:54:17 -04:00
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write_reg(char r, char *reg)
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2024-04-04 15:20:06 -04:00
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{
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2024-04-21 12:13:30 -04:00
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char c, *cap = walk(reg);
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2024-04-22 23:22:54 -04:00
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switch(r) {
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2024-04-28 21:55:03 -04:00
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case '>': /* op: output */
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2024-04-28 23:37:53 -04:00
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case ':': device_write(reg); return;
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2024-04-28 21:55:03 -04:00
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case '<': /* op: input */
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2024-04-28 23:37:53 -04:00
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case '~': device_read(); return;
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2024-04-22 23:22:54 -04:00
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case '^': /* op: join */
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if(*reg == '(') reg++, --cap;
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while(reg < cap && (c = *reg++))
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if(!spacer(c)) *dst_++ = c;
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2024-04-25 21:36:45 -04:00
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return;
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2024-04-22 23:22:54 -04:00
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case '.': /* op: unwrap */
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if(*reg == '(') reg++, --cap;
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2024-04-21 12:13:30 -04:00
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while(reg < cap) *dst_++ = *reg++;
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2024-04-25 21:36:45 -04:00
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return;
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2024-04-22 23:22:54 -04:00
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case '*': { /* op: explode */
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int i, depth = 0;
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2024-04-23 16:51:25 -04:00
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if(*reg == '(' && reg[1] != ')') { /* tuple */
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2024-04-22 23:22:54 -04:00
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reg++;
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while(reg < cap) {
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while((c = *reg) && !spacer(c))
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*dst_++ = c, reg++;
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*dst_++ = ' ';
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*dst_++ = '(', reg++, depth++;
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}
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2024-04-23 23:20:31 -04:00
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} else /* token */
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2024-04-22 23:22:54 -04:00
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while((c = *reg++) && !spacer(c))
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*dst_++ = c, *dst_++ = ' ', *dst_++ = '(', depth++;
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for(i = 0; i < depth; i++) *dst_++ = ')';
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2024-04-25 21:36:45 -04:00
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return;
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2024-04-22 23:22:54 -04:00
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}
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default:
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while(reg < cap) *dst_++ = *reg++;
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2024-04-25 21:36:45 -04:00
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return;
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2024-04-22 23:22:54 -04:00
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}
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2024-04-04 15:20:06 -04:00
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}
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2024-04-07 17:55:55 -04:00
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static int
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2024-04-28 23:49:27 -04:00
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write_tail(char *s, Rule *r)
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2024-04-04 17:55:51 -04:00
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{
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2024-04-14 22:36:16 -04:00
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while((*dst_++ = *s++))
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2024-04-07 17:55:55 -04:00
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;
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2024-04-24 18:46:27 -04:00
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*dst_ = 0;
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2024-04-14 22:36:16 -04:00
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if((flip = !flip))
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src_ = bank_b, dst_ = bank_a;
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2024-04-06 11:36:10 -04:00
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else
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2024-04-14 22:36:16 -04:00
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src_ = bank_a, dst_ = bank_b;
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2024-04-28 23:49:27 -04:00
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if(!quiet && r) fprintf(stderr, "%02d %s\n", r->id, src_), ++r->refs;
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2024-04-07 17:55:55 -04:00
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return 1;
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2024-04-04 17:55:51 -04:00
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}
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2024-04-25 15:17:31 -04:00
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static int
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2024-04-25 21:39:17 -04:00
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apply_rule(Rule *r, char *s)
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2024-04-22 20:39:39 -04:00
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{
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2024-04-27 18:06:00 -04:00
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unsigned char i, rid;
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2024-04-27 17:47:06 -04:00
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char c, *a = r->a, *b = r->b, *origin = dst_, *reg;
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2024-04-27 11:46:31 -04:00
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/* phase: clean regs */
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2024-04-27 17:47:06 -04:00
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if(rmax) {
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for(i = 0; i <= rmax; i++)
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regs[i] = 0;
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rmin = 0xff, rmax = 0x00;
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}
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2024-04-24 14:12:57 -04:00
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/* phase: match rule */
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2024-04-24 23:26:56 -04:00
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while((c = *a++)) {
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2024-04-22 20:43:35 -04:00
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if(c == '?') {
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2024-04-24 14:18:06 -04:00
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char *pcap = walk(s);
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2024-04-27 17:47:06 -04:00
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rid = *a++;
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2024-04-27 12:24:48 -04:00
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if((reg = regs[rid])) { /* reg cmp */
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2024-04-22 23:32:42 -04:00
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char *rcap = walk(reg), *pp = s;
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2024-04-22 20:43:35 -04:00
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while(reg < rcap || pp < pcap)
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2024-04-25 15:17:31 -04:00
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if(*reg++ != *pp++) return 0;
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2024-04-27 17:47:06 -04:00
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} else { /* reg set */
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2024-04-27 12:24:48 -04:00
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regs[rid] = s;
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2024-04-27 17:47:06 -04:00
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if(rid < rmin) rmin = rid;
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if(rid > rmax) rmax = rid;
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}
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2024-04-26 14:06:30 -04:00
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s = pcap;
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} else if(c != *s++)
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return 0;
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2024-04-22 20:43:35 -04:00
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}
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2024-04-26 01:35:15 -04:00
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c = *s;
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if(!spacer(c)) return 0;
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2024-04-24 14:12:57 -04:00
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/* phase: write rule */
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2024-04-25 12:48:24 -04:00
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while((c = *b++)) {
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if(c == '?') {
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2024-04-27 17:47:06 -04:00
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rid = *b;
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if((reg = regs[rid]))
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b++, write_reg(rid, reg);
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2024-04-25 12:48:24 -04:00
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else
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2024-04-22 20:54:17 -04:00
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*dst_++ = c;
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2024-04-25 12:48:24 -04:00
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} else
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*dst_++ = c;
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2024-04-22 20:54:17 -04:00
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}
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2024-04-25 12:48:24 -04:00
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if(dst_ == origin) {
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while(*s == ' ') s++;
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if(*s == ')' && *(dst_ - 1) == ' ') dst_--;
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}
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2024-04-28 23:49:27 -04:00
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return write_tail(s, r);
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2024-04-22 20:54:17 -04:00
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}
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2024-04-24 16:41:09 -04:00
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static char *
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2024-04-28 00:12:14 -04:00
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parse_frag(char **side, char *src)
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2024-04-24 13:31:46 -04:00
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{
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2024-04-27 17:47:06 -04:00
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int wrapped;
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2024-04-27 18:06:00 -04:00
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char c, *cap;
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2024-04-24 18:08:09 -04:00
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while((c = *src) && c == ' ') src++;
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2024-04-28 00:12:14 -04:00
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if(c == ')' || (c == '<' && src[1] == '>')) {
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*side = ∅
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return src;
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}
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*side = dict_, cap = walk(src), wrapped = c == '(';
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2024-04-24 18:08:09 -04:00
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if(wrapped) src++, cap--;
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2024-04-27 18:06:00 -04:00
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while(src < cap) c = *src, *dict_++ = *src++;
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2024-04-24 18:34:11 -04:00
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src += wrapped, *dict_++ = 0;
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2024-04-24 16:41:09 -04:00
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return src;
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2024-04-24 13:31:46 -04:00
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}
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2024-04-26 23:50:22 -04:00
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static Rule *
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2024-04-27 00:18:02 -04:00
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find_rule(char *s, char *cap)
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2024-04-26 23:50:22 -04:00
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{
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Rule *r = rules;
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2024-04-27 00:18:02 -04:00
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if(*s == '(') s++, cap--;
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2024-04-26 23:50:22 -04:00
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while(r < rules_) {
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char *ss = s, *a = r->a;
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2024-04-27 14:24:00 -04:00
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if(a)
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while(*ss++ == *a++)
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if(!*a && ss == cap) return r;
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2024-04-26 23:50:22 -04:00
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r++;
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}
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2024-04-28 00:12:14 -04:00
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return NULL;
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2024-04-26 23:50:22 -04:00
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}
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2024-04-04 13:07:49 -04:00
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static int
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2024-04-07 19:16:33 -04:00
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rewrite(void)
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2024-04-04 13:07:49 -04:00
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{
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2024-04-25 21:39:17 -04:00
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char c, last = 0, *cap, *s = src_;
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2024-04-21 12:13:30 -04:00
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while(*s == ' ') s++;
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2024-04-11 12:40:04 -04:00
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while((c = *s)) {
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2024-04-26 12:02:03 -04:00
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if(c == '(' || spacer(last)) {
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2024-04-24 13:31:46 -04:00
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Rule *r = NULL;
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2024-04-26 23:50:22 -04:00
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/* phase: undefine */
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if(c == '>' && s[1] == '<') {
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2024-04-27 00:35:31 -04:00
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s += 2;
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2024-04-21 12:13:30 -04:00
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while(*s == ' ') s++;
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2024-04-27 13:04:01 -04:00
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cap = walk(s), r = find_rule(s, cap);
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2024-04-28 21:55:03 -04:00
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if(r != NULL) {
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2024-04-28 23:37:53 -04:00
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if(!quiet) fprintf(stderr, ">< (%s) (%s)\n", r->a, r->b);
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2024-04-28 00:12:14 -04:00
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r->a = 0;
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}
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2024-04-27 00:18:02 -04:00
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while(*cap == ' ') cap++;
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2024-04-28 23:49:27 -04:00
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return write_tail(cap, NULL);
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2024-04-27 11:46:31 -04:00
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}
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2024-04-28 00:12:14 -04:00
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/* phase: define */
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if(c == '<' && s[1] == '>') {
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|
r = rules_, r->id = rules_ - rules - 1;
|
|
|
|
s = parse_frag(&r->b, parse_frag(&r->a, s + 2));
|
2024-04-28 21:55:03 -04:00
|
|
|
if(*r->a) {
|
2024-04-28 23:37:53 -04:00
|
|
|
if(!quiet) fprintf(stderr, "<> (%s) (%s)\n", r->a, r->b);
|
2024-04-28 00:12:14 -04:00
|
|
|
rules_++;
|
|
|
|
}
|
|
|
|
while(*s == ' ') s++;
|
2024-04-28 23:49:27 -04:00
|
|
|
return write_tail(s, NULL);
|
2024-04-28 00:12:14 -04:00
|
|
|
}
|
2024-04-27 11:46:31 -04:00
|
|
|
/* phase: lambda */
|
|
|
|
if(c == '?' && s[1] == '(') {
|
2024-04-27 18:06:00 -04:00
|
|
|
cap = walk(s + 1);
|
|
|
|
r = &lambda, r->id = -1;
|
2024-04-28 00:12:14 -04:00
|
|
|
parse_frag(&r->b, parse_frag(&r->a, s + 2));
|
2024-04-27 18:06:00 -04:00
|
|
|
s = cap;
|
2024-04-27 11:46:31 -04:00
|
|
|
while(*s == ' ') s++;
|
2024-04-28 23:49:27 -04:00
|
|
|
if(!apply_rule(&lambda, s)) write_tail(s, r);
|
2024-04-27 11:46:31 -04:00
|
|
|
return 1;
|
2024-04-22 23:13:19 -04:00
|
|
|
}
|
2024-04-24 18:55:48 -04:00
|
|
|
/* phase: match */
|
2024-04-22 23:15:33 -04:00
|
|
|
for(r = rules; r < rules_; r++)
|
2024-04-26 23:50:22 -04:00
|
|
|
if(r->a && apply_rule(r, s)) return 1;
|
2024-04-04 15:09:47 -04:00
|
|
|
}
|
2024-04-14 22:36:16 -04:00
|
|
|
*dst_++ = last = c;
|
2024-04-11 12:40:04 -04:00
|
|
|
s++;
|
2024-04-04 13:30:31 -04:00
|
|
|
}
|
2024-04-14 22:36:16 -04:00
|
|
|
*dst_++ = 0;
|
2024-04-04 22:55:05 -04:00
|
|
|
return 0;
|
2024-04-04 13:07:49 -04:00
|
|
|
}
|
|
|
|
|
2024-04-07 13:58:39 -04:00
|
|
|
int
|
|
|
|
main(int argc, char **argv)
|
2024-04-07 13:56:43 -04:00
|
|
|
{
|
2024-04-07 13:58:39 -04:00
|
|
|
FILE *f;
|
2024-04-27 11:46:31 -04:00
|
|
|
int i, pl = 0, pr = 0, rw = 0;
|
2024-04-26 14:06:30 -04:00
|
|
|
char c, last = 0, *w = bank_a;
|
2024-04-07 13:58:39 -04:00
|
|
|
if(argc < 2)
|
2024-04-18 14:33:23 -04:00
|
|
|
return !printf("usage: modal [-vqn] source.modal\n");
|
|
|
|
for(i = 1; i < argc && *argv[i] == '-'; i++) {
|
|
|
|
switch(argv[i][1]) {
|
2024-04-29 12:46:27 -04:00
|
|
|
case 'v': /* version */ return !printf("Modal Interpreter, 29 Apr 2024.\n");
|
2024-04-22 18:29:54 -04:00
|
|
|
case 'q': /* quiet */ quiet = 1; break;
|
2024-04-28 15:32:46 -04:00
|
|
|
case 'p': /* debug */ debug = 1; break;
|
2024-04-18 14:33:23 -04:00
|
|
|
case 'n': /* infinite */ cycles = 0xffffffff; break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if(!(f = fopen(argv[i], "r")))
|
2024-04-27 12:02:56 -04:00
|
|
|
return !printf("Modal file invalid: %s.\n", argv[i]);
|
2024-04-07 13:56:43 -04:00
|
|
|
while(fread(&c, 1, 1, f)) {
|
2024-04-12 11:54:07 -04:00
|
|
|
c = c <= 0x20 ? 0x20 : c;
|
2024-04-26 14:06:30 -04:00
|
|
|
if(c == ' ' && last == '(') continue;
|
|
|
|
if(c == ')' && last == ' ') w--;
|
|
|
|
if(c == ' ' && last == ' ') w--;
|
2024-04-23 12:35:58 -04:00
|
|
|
if(c == '(') pl++;
|
|
|
|
if(c == ')') pr++;
|
2024-04-26 14:06:30 -04:00
|
|
|
if(c == '(' && last != '?' && !spacer(last)) *w++ = ' ';
|
|
|
|
if(last == ')' && !spacer(c)) *w++ = ' ';
|
|
|
|
*w++ = last = c;
|
2024-04-07 13:56:43 -04:00
|
|
|
}
|
2024-04-08 18:26:53 -04:00
|
|
|
while(*(--w) <= ' ') *w = 0;
|
2024-04-07 13:56:43 -04:00
|
|
|
fclose(f);
|
2024-04-21 12:46:53 -04:00
|
|
|
if(pr != pl)
|
2024-04-28 03:15:25 -04:00
|
|
|
return !fprintf(stderr, "Modal program imbalanced.\n");
|
2024-04-27 11:46:31 -04:00
|
|
|
while(rewrite() && ++rw)
|
2024-04-28 03:15:25 -04:00
|
|
|
if(!cycles--) return !fprintf(stderr, "Modal rewrites exceeded.\n");
|
2024-04-27 12:02:56 -04:00
|
|
|
if(!quiet) {
|
2024-04-28 21:55:03 -04:00
|
|
|
while(rules_-- > rules) {
|
2024-04-29 12:46:27 -04:00
|
|
|
if(rules_->a) {
|
|
|
|
if(!rules_->refs)
|
|
|
|
fprintf(stderr, "-- Unused rule: %d <> (%s) (%s)\n", rules_->id, rules_->a, rules_->b);
|
|
|
|
if(debug)
|
|
|
|
fprintf(stderr, " (%s) (%s), %d times.\n", rules_->a, rules_->b, rules_->refs);
|
|
|
|
}
|
2024-04-28 15:32:46 -04:00
|
|
|
}
|
2024-04-29 12:46:27 -04:00
|
|
|
if(rw)
|
|
|
|
fprintf(stderr, "Completed in %d rewrites.\n", rw - 1);
|
2024-04-27 12:02:56 -04:00
|
|
|
}
|
2024-04-04 14:54:31 -04:00
|
|
|
return 0;
|
2024-04-28 03:15:25 -04:00
|
|
|
}
|