Day 7, doesnt return

1 files changed, 175 insertions, 0 deletions

diff --git a/day7/day7gen.c b/day7/day7gen.c
new file mode 100644
index 0000000..86cd7c1
--- /dev/null
+++ b/day7/day7gen.c
@@ -0,0 +1,175 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#define ungetchar(ch) ungetc(ch, stdin)
+
+typedef enum { NONE, NUMBER, WIRE } SIGTYPE;
+
+typedef enum { ASSIGN, AND, OR, NOT, LSHIFT, RSHIFT } OPTYPE;
+
+typedef struct {
+  SIGTYPE type;
+  union {
+    char wire[20];
+    uint16_t number;
+  } value;
+} SIGNAL;
+
+SIGNAL wire() {
+  SIGNAL s;
+  int i = 0, ch;
+
+  s.type = WIRE;
+  while((ch = getchar()) != ' ' && ch != '\n')
+    s.value.wire[i++] = ch;
+  s.value.wire[i] = '\0';
+
+  return s;
+}
+
+SIGNAL number() {
+  SIGNAL s;
+  int ch, num = 0;
+
+  while((ch = getchar()) != ' ')
+    num = (num * 10) + (ch - 48);
+
+  s.type = NUMBER;
+  s.value.number = num;
+
+  return s;
+}
+
+void printfunction(OPTYPE op, SIGNAL in1, SIGNAL in2, SIGNAL out) {
+  char* b1 = (in1.type == WIRE ? "()\0" : "\0");
+  char* b2 = (in2.type == WIRE ? "()\0" : "\0");
+  char s1[25], s2[25];
+
+  switch(in1.type) {
+    case NUMBER:
+      sprintf(s1, "%d", in1.value.number);
+      break;
+    case WIRE:
+      sprintf(s1, "wire_%s", in1.value.wire);
+  }
+
+  switch(in2.type) {
+    case NUMBER:
+      sprintf(s2, "%d", in2.value.number);
+      break;
+    case WIRE:
+      sprintf(s2, "wire_%s", in2.value.wire);
+  }
+
+  dprintf(2, "uint16_t wire_%s();\n", out.value.wire);
+
+  printf("uint16_t wire_%s() {\n", out.value.wire);
+  printf("\tuint16_t out;\n");
+  printf("\tif(iscached(\"%s\"))\n", out.value.wire);
+  printf("\t\treturn getcache(\"%s\");\n", out.value.wire);
+  printf("\telse {\n");
+  switch(op) {
+    case ASSIGN:
+      printf("\t\tout = %s%s;\n", s1, b1);
+      break;
+    case AND:
+      printf("\t\tout = (%s%s & %s%s);\n", s1, b1, s2, b2);
+      break;
+    case OR:
+      printf("\t\tout = (%s%s | %s%s);\n", s1, b1, s2, b1);
+      break;
+    case NOT:
+      printf("\t\tout = ~%s%s;\n", s2, b2);
+      break;
+    case LSHIFT:
+      printf("\t\tout = (%s%s << %s%s);\n", s1, b1, s2, b2);
+      break;
+    case RSHIFT:
+      printf("\t\tout = (%s%s >> %s%s);\n", s1, b1, s2, b2);
+      break;
+  }
+  printf("\t\tputcache(\"%s\", out);\n", out.value.wire);
+  printf("\t\treturn out;\n");
+  printf("\t}\n");
+  printf("}\n");
+}
+
+void preamble() {
+  dprintf(3, "#include <stdlib.h>\n#include <stdio.h>\n#include <string.h>\n#include <stdint.h>\n\n");
+  dprintf(3, "uint16_t* cache;\nchar* incache;\n\n");
+  dprintf(3, "int wtoi(char* wire) {\n\tint idx = 0, i;\n\tfor(i = 0; wire[i] != '\\0'; i++) {\n\t\tidx *= 26;\n\t\tidx += wire[i];\n\t}\n\treturn idx;\n}\n");
+  dprintf(3, "char iscached(char* wire) {\n\treturn incache[wtoi(wire)];\n}\n");
+  dprintf(3, "uint16_t getcache(char* wire) {\n\treturn cache[wtoi(wire)];\n}\n");
+  dprintf(3, "void putcache(char* wire, uint16_t value) {\n\tcache[wtoi(wire)] = value;\n}\n\n");
+}
+
+void postamble() {
+  char* len = "26*26";
+  printf("\nint main() {\n");
+  printf("\tcache = (uint16_t*) malloc(%s*sizeof(uint16_t));\n", len);
+  printf("\tincache = (char*) malloc(%s*sizeof(char));\n", len);
+  printf("\tmemset(incache, 0, %s);\n\n", len);
+  printf("\tprintf(\"Value of wire a: %%d\\n\", wire_a());\n\n");
+  printf("\tfree(cache);\n");
+  printf("\tfree(incache);\n");
+  printf("}\n");
+}
+
+int readline() {
+  SIGNAL in1, in2, out;
+  OPTYPE op;
+  int ch;
+
+  ch = getchar();
+  if(ch == EOF) {
+    return 0;
+  } else if(ch <= 'z' && ch >= 'a') {
+    ungetchar(ch);
+    in1 = wire();
+  } else if(ch <= '9' && ch >= '0') {
+    ungetchar(ch);
+    in1 = number();
+  } else if(ch == 'N') {
+    ungetchar(ch);
+    in1.type = NONE;
+  }
+
+  ch = getchar();
+  switch(ch) {
+    case '-': op = ASSIGN; break;
+    case 'A': op = AND;    break;
+    case 'O': op = OR;     break;
+    case 'N': op = NOT;    break;
+    case 'L': op = LSHIFT; break;
+    case 'R': op = RSHIFT;
+  }
+  while((ch = getchar()) != ' ');
+
+  if(op == ASSIGN)
+    out = wire();
+  else {
+    ch = getchar();
+    if(ch <= 'z' && ch >= 'a') {
+      ungetchar(ch);
+      in2 = wire();
+    } else if(ch <= '9' && ch >= '0') {
+      ungetchar(ch);
+      in2 = number();
+    }
+
+    while((ch = getchar()) != ' ');
+
+    out = wire();
+  }
+
+  printfunction(op, in1, in2, out);
+  return 1;
+}
+
+int main() {
+  preamble();
+  while(readline());
+  postamble();
+  return 0;
+}