API tools faq
paste
Advertisement
gur111

Itamar Pvt - getOpCode

gur111
Aug 5th, 2020 (edited)
1,611
0
Never
Add comment
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
C 2.95 KB | None | 0 0
raw download clone embed print report
  1.  
  2. #include "data.h"
  3.  
  4. #include <stdio.h>
  5. #include <stdlib.h>
  6.  
  7. typedef struct {
  8.     const char *name;
  9.     const int opcode;
  10.     const int func;
  11. } OpInfo;
  12.  
  13. const OpInfo OPERATIONS[] = {
  14.     {"mov", 0, 0},  {"cmp", 1, 0},  {"add", 2, 1},
  15.     {"sub", 2, 2},  {"lea", 4, 0},  {"clr", 5, 1},
  16.     {"not", 5, 2},  {"inc", 5, 3},  {"dec", 5, 4},
  17.     {"jmp", 9, 1},  {"bne", 9, 2},  {"jsr", 9, 3} {"red", 12, 0},
  18.     {"prn", 13, 0}, {"rst", 14, 0}, {"stop", 15, 0}};
  19.  
  20. const char *REGISTER_NAMES[] = {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7"};
  21.  
  22. int getOpCode(const char *name) {
  23.     int i;
  24.     for (i = 0; i < sizeof(OPERATIONS) / sizeof(OpInfo); i++) {
  25.         if (strcmp(name, OPEARTIONS[i].name) == 0) {
  26.             return OPERATIONS[i].opcode;
  27.         }
  28.     }
  29.     fprintf(stderr, "Error in line %d. Opcode not detected.\n", 0/* TODO:
  30.     Replace 0 with the line number (maybe use external variable) */);
  31.     return -1;
  32. }
  33.  
  34. int getFunc(const char *name) {
  35.     int i;
  36.  
  37.     for (i = 0; i < sizeof(OPERATIONS) / sizeof(OpInfo); i++) {
  38.         if (strcmp(name, OPEARTIONS[i].name) == 0) {
  39.             return OPERATIONS[i].func;
  40.         }
  41.     }
  42.     fprintf(stderr, "Error in line %d. Funcion not detected.\n", 0/* TODO:
  43.     Replace 0 with the line number (maybe use external variable) */);
  44.     return -1;
  45. }
  46.  
  47. void fillZeros(char *array, int size) {
  48.     int i;
  49.  
  50.     for (i = 0; i < size; i++) {
  51.         array[i] = '0';
  52.     }
  53. }
  54.  
  55. flag isLabel(char *str) {
  56.     int len = strlen(str);
  57.     // Make sure the label has : at the end
  58.     if (str[len - 1] != ':') {
  59.         return FALSE;
  60.     }
  61.  
  62.     // Make sure that the length is at most 31 (excluding :)
  63.     if (len > 32) {
  64.         return FALSE;
  65.     }
  66.  
  67.     // Make sure, the label starts with a letter
  68.     if ((str[0] < 'a' || str[0] > 'z') && (str[0] < 'A' || str[0] > 'Z')) {
  69.         return FALSE;
  70.     }
  71.  
  72.     // Check the rest of the characters (excluding : at the end; len - 1)
  73.     for (i = 1; i < len - 1; i++) {
  74.         // If the character is neither a letter nor a digit, return false
  75.         if ((str[i] < 'a' || str[i] > 'z') && (str[i] < 'A' || str[i] > 'Z') &&
  76.             (str[i] < '0' || str[i] > '9')) {
  77.             return FALSE;
  78.         }
  79.     }
  80.  
  81.     // Make sure we're not a saved instruction
  82.     for (i = 0; i < sizeof(OPERATIONS) / sizeof(OpInfo); i++) {
  83.         // Compare only until the character before the ":"
  84.         if (strncmp(str, OPEARTIONS[i].name, len - 1) == 0) {
  85.             return FALSE;
  86.         }
  87.     }
  88.  
  89.     // Make sure we're not a register
  90.     for (i = 0; i < sizeof(REGISTER_NAMES) / sizeof(char *); i++) {
  91.         if (strncmp(str, REGISTER_NAMES[i], len - 1) == 0) {
  92.             return FALSE;
  93.         }
  94.     }
  95.  
  96.     return TRUE;
  97. }
  98.  
  99. int main() {
  100.     char str[] = "abcdef";
  101.     printf("%s", str);
  102. }
  103.  
  104. // a = "hello world"
  105. // b = "hello israel"
  106. // c = "hello world"
  107. // strncmp(a, c, 500) // == 0
  108. // strncmp(a, b, 5) // == 0
  109. // strcmp(a, b) // != 0
  110.  
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement
Public Pastes
Advertisement
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy.  OK, I Understand
Not a member of Pastebin yet?
Sign Up, it unlocks many cool features!