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/thirdparty/breakpad/third_party/libdisasm/x86_imm.c

http://github.com/tomahawk-player/tomahawk
C | 70 lines | 57 code | 9 blank | 4 comment | 4 complexity | a6cba9615cf1fe4ba03b7c1142bf95a1 MD5 | raw file
 1#include "qword.h"
 2#include "x86_imm.h"
 3
 4#include <stdio.h>
 5
 6unsigned int x86_imm_signsized( unsigned char * buf, size_t buf_len,
 7				void *dest, unsigned int size ) {
 8	signed char *cp = (signed char *) dest;
 9	signed short *sp = (signed short *) dest;
10	int32_t *lp = (int32_t *) dest;
11	qword_t *qp = (qword_t *) dest;
12
13	if ( size > buf_len ) {
14		return 0;
15	}
16
17	/* Copy 'size' bytes from *buf to *op
18	 * return number of bytes copied */
19	switch (size) {
20		case 1:		/* BYTE */
21			*cp =  *((signed char *) buf);
22			break;
23		case 2:		/* WORD */
24			*sp =  *((signed short *) buf);
25			break;
26		case 6:
27		case 8:		/* QWORD */
28			*qp = *((qword_t *) buf);
29			break;
30		case 4:		/* DWORD */
31		default:
32			*lp = *((int32_t *) buf);
33			break;
34	}
35	return (size);
36}
37
38unsigned int x86_imm_sized( unsigned char * buf, size_t buf_len, void *dest,
39			    unsigned int size ) {
40	unsigned char *cp = (unsigned char *) dest;
41	unsigned short *sp = (unsigned short *) dest;
42	uint32_t *lp = (uint32_t *) dest;
43	qword_t *qp = (qword_t *) dest;
44
45	if ( size > buf_len ) {
46		return 0;
47	}
48
49	/* Copy 'size' bytes from *buf to *op
50	 * return number of bytes copied */
51	switch (size) {
52		case 1:		/* BYTE */
53			*cp =  *((unsigned char *) buf);
54			break;
55		case 2:		/* WORD */
56			*sp =  *((unsigned short *) buf);
57			break;
58		case 6:
59		case 8:		/* QWORD */
60			*qp = *((qword_t *) buf);
61			break;
62		case 4:		/* DWORD */
63		default:
64			*lp = *((uint32_t *) buf);
65			break;
66	}
67
68	return (size);
69}
70