CHG: remove clang warning for -O4,

[proxmark3-svn] / common / lfdemod.c

diff --git a/common/lfdemod.c b/common/lfdemod.c
index 4c0f3ad9579cae8a90b4473fa4f6d44885831542..967a98a88ea4d94733850f088012ee6536fca60f 100644 (file)
--- a/common/lfdemod.c
+++ b/common/lfdemod.c
@@ -135,8 +135,7 @@ uint32_t bytebits_to_byte(uint8_t *src, size_t numbits)
 uint32_t bytebits_to_byteLSBF(uint8_t *src, size_t numbits)
 {
        uint32_t num = 0;
-       for(int i = 0 ; i < numbits ; i++)
-       {
+       for(int i = 0 ; i < numbits ; i++) {
                num = (num << 1) | *(src + (numbits-(i+1)));
        }
        return num;
@@ -678,6 +677,20 @@ int VikingDemod_AM(uint8_t *dest, size_t *size) {
        return (int) startIdx;
 }
 
+// find presco preamble 0x10D in already demoded data
+int PrescoDemod(uint8_t *dest, size_t *size) {
+       //make sure buffer has data
+       if (*size < 64*2) return -2;
+
+       size_t startIdx = 0;
+       uint8_t preamble[] = {1,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0};
+       uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
+       if (errChk == 0) return -4; //preamble not found
+       //return start position
+       return (int) startIdx;
+}
+
+
 // Ask/Biphase Demod then try to locate an ISO 11784/85 ID
 // BitStream must contain previously askrawdemod and biphasedemoded data
 int FDXBdemodBI(uint8_t *dest, size_t *size)