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Add checks in em4x50read to avoid segfaults in case loops go over the GraphTraceLen.

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edouard@lafargue.name 2009-07-30 15:24:03 +00:00
parent 890bf4be90
commit 3628c31882
1 changed files with 7 additions and 5 deletions
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10
winsrc/command.cpp
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@ -301,17 +301,19 @@ static void CmdEM4x50read(char *str)
while(i < GraphTraceLen) while(i < GraphTraceLen)
{ {
// measure from low to low // measure from low to low
while(GraphBuffer[i] > low) while((GraphBuffer[i] > low) && (i<GraphTraceLen))
++i; ++i;
start= i; start= i;
while(GraphBuffer[i] < high) while((GraphBuffer[i] < high) && (i<GraphTraceLen))
++i; ++i;
while(GraphBuffer[i] > low) while((GraphBuffer[i] > low) && (i<GraphTraceLen))
++i; ++i;
if (j>(MAX_GRAPH_TRACE_LEN/64)) {
break;
}
tmpbuff[j++]= i - start; tmpbuff[j++]= i - start;
} }
/* look for data start - should be 2 pairs of LW (pulses of 192,128) */ /* look for data start - should be 2 pairs of LW (pulses of 192,128) */
start= -1; start= -1;
skip= 0; skip= 0;