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x86_imm.c

#include "qword.h"
#include "x86_imm.h"

#include <stdio.h>

unsigned int x86_imm_signsized( unsigned char * buf, size_t buf_len,
                        void *dest, unsigned int size ) {
      signed char *cp = (signed char *) dest;
      signed short *sp = (signed short *) dest;
      int32_t *lp = (int32_t *) dest;
      qword_t *qp = (qword_t *) dest;

      if ( size > buf_len ) {
            return 0;
      }

      /* Copy 'size' bytes from *buf to *op
       * return number of bytes copied */
      switch (size) {
            case 1:           /* BYTE */
                  *cp =  *((signed char *) buf);
                  break;
            case 2:           /* WORD */
                  *sp =  *((signed short *) buf);
                  break;
            case 6:
            case 8:           /* QWORD */
                  *qp = *((qword_t *) buf);
                  break;
            case 4:           /* DWORD */
            default:
                  *lp = *((int32_t *) buf);
                  break;
      }
      return (size);
}

unsigned int x86_imm_sized( unsigned char * buf, size_t buf_len, void *dest,
                      unsigned int size ) {
      unsigned char *cp = (unsigned char *) dest;
      unsigned short *sp = (unsigned short *) dest;
      uint32_t *lp = (uint32_t *) dest;
      qword_t *qp = (qword_t *) dest;

      if ( size > buf_len ) {
            return 0;
      }

      /* Copy 'size' bytes from *buf to *op
       * return number of bytes copied */
      switch (size) {
            case 1:           /* BYTE */
                  *cp =  *((unsigned char *) buf);
                  break;
            case 2:           /* WORD */
                  *sp =  *((unsigned short *) buf);
                  break;
            case 6:
            case 8:           /* QWORD */
                  *qp = *((qword_t *) buf);
                  break;
            case 4:           /* DWORD */
            default:
                  *lp = *((uint32_t *) buf);
                  break;
      }

      return (size);
}


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