dark0707
/
px4-firmware
forked from Archive/PX4-Autopilot
1
0
Fork 0
Code Pull Requests Activity

Add more paranoid checks to sf0x altitude parsing

This commit is contained in:
Lorenz Meier 2014-08-31 17:59:21 +02:00
parent c17c585c3e
commit 7a253d50f8
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/drivers/sf0x/sf0x.cpp
View File

@ -593,13 +593,19 @@ SF0X::collect()
/* wipe out partially read content from last cycle(s), check for dot */
for (unsigned i = 0; i < (lend - 2); i++) {
if (_linebuf[i] == '\n') {
/* allocate temporary buffer */
char buf[sizeof(_linebuf)];
/* copy remainder of buffer (2nd measurement) to temporary buffer */
memcpy(buf, &_linebuf[i+1], (lend + 1) - (i + 1));
/* copy temporary buffer to beginning of line buffer,
* effectively overwriting a previous temporary
* measurement
*/
memcpy(_linebuf, buf, (lend + 1) - (i + 1));
}
/* we need a digit before the dot and a dot for a valid number */
if (i > 0 && _linebuf[i] == '.') {
if (i > 0 && ((_linebuf[i - 1] >= '0') && (_linebuf[i - 1] <= '9')) && (_linebuf[i] == '.')) {
valid = true;
}
}