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127 lines
3.0 KiB
C
127 lines
3.0 KiB
C
/* radare - LGPL - Copyright 2009 pancake<nopcode.org> */
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#include "r_types.h"
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#include "r_util.h"
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#if 0
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/* TODO: the basic object lifecycle must be simplified */
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struct r_class_t {
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// new/free are implicit
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.init = &r_buf_init,
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.fini = &r_buf_fini,
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} r_buf_class;
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#define r_buf_init(x) r_buf_class->init
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#endif
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R_API struct r_buf_t *r_buf_new() {
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RBuffer *b;
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b = R_NEW (RBuffer);
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if (b) {
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b->buf = NULL;
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b->length = 0;
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b->cur = 0;
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b->base = 0LL;
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}
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return b;
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}
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R_API int r_buf_set_bits(RBuffer *b, int bitoff, int bitsize, ut64 value) {
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// TODO: implement r_buf_set_bits
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// TODO: get the implementation from reg/value.c ?
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return R_FALSE;
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}
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R_API int r_buf_set_bytes(RBuffer *b, ut8 *buf, int length) {
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if (b->buf)
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free (b->buf);
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if (!(b->buf = malloc (length)))
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return R_FALSE;
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memcpy (b->buf, buf, length);
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b->length = length;
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return R_TRUE;
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}
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static int r_buf_cpy(RBuffer *b, ut64 addr, ut8 *dst, const ut8 *src, int len, int write) {
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int end;
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if (addr == R_BUF_CUR)
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addr = b->cur;
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else addr -= b->base;
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if (addr > b->length)
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return -1;
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end = (int)(addr+len);
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if (end > b->length)
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len -= end-b->length;
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if (write)
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dst += addr;
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else src += addr;
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memcpy (dst, src, len);
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b->cur = addr + len;
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return len;
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}
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static int r_buf_fcpy_at (RBuffer *b, ut64 addr, ut8 *buf, const char *fmt, int n, int write) {
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int i, j, k, len, tsize, endian, m = 1;
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if (addr == R_BUF_CUR)
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addr = b->cur;
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else addr -= b->base;
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if (addr < 0 || addr > b->length)
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return -1;
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for (i = len = 0; i < n; i++)
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for (j = 0; fmt[j]; j++) {
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if (len > b->length)
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return -1;
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switch (fmt[j]) {
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case '0'...'9':
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if (m == 1)
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m = r_num_get(NULL, &fmt[j]);
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continue;
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case 's': tsize = 2; endian = 1; break;
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case 'S': tsize = 2; endian = 0; break;
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case 'i': tsize = 4; endian = 1; break;
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case 'I': tsize = 4; endian = 0; break;
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case 'l': tsize = 8; endian = 1; break;
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case 'L': tsize = 8; endian = 0; break;
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case 'c': tsize = 1; endian = 1; break;
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default: return -1;
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}
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for (k = 0; k < m; k++) {
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if (write)
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r_mem_copyendian((ut8*)&buf[addr+len+k*tsize],
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(ut8*)&b->buf[len+k*tsize], tsize, endian);
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else r_mem_copyendian((ut8*)&buf[len+k*tsize],
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(ut8*)&b->buf[addr+len+k*tsize], tsize, endian);
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}
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len += m*tsize; m = 1;
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}
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b->cur = addr + len;
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return len;
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}
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R_API int r_buf_read_at(RBuffer *b, ut64 addr, ut8 *buf, int len) {
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return r_buf_cpy (b, addr, buf, b->buf, len, R_FALSE);
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}
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R_API int r_buf_fread_at (RBuffer *b, ut64 addr, ut8 *buf, const char *fmt, int n) {
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return r_buf_fcpy_at (b, addr, buf, fmt, n, R_FALSE);
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}
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R_API int r_buf_write_at(RBuffer *b, ut64 addr, const ut8 *buf, int len) {
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return r_buf_cpy (b, addr, b->buf, buf, len, R_TRUE);
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}
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R_API int r_buf_fwrite_at (RBuffer *b, ut64 addr, ut8 *buf, const char *fmt, int n) {
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return r_buf_fcpy_at (b, addr, buf, fmt, n, R_TRUE);
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}
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R_API void r_buf_deinit(struct r_buf_t *b) {
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free (b->buf);
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}
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R_API void r_buf_free(struct r_buf_t *b) {
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r_buf_deinit (b);
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free (b);
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}
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