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radiotools.cpp: Don't use register keyword with C++17 standard

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Conditionally use register keyword for backward compatibility;
remove for C++17 and later where it is not allowed.
This commit is contained in:
Thilo Graf
2024-07-04 16:08:36 +02:00
parent caf762464b
commit e7438889ac
1 changed files with 6 additions and 2 deletions
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8
src/driver/radiotools.cpp
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@@ -28,7 +28,11 @@
unsigned short crc16_ccitt(unsigned char *daten, int len, bool skipfirst) unsigned short crc16_ccitt(unsigned char *daten, int len, bool skipfirst)
{ {
register unsigned short crc = 0xffff; #if __cplusplus < 201703L
register unsigned short crc = 0xffff; // Use register for older standards
#else
unsigned short crc = 0xffff; // register keyword is not allowed in C++17 and later
#endif
if (skipfirst) daten++; if (skipfirst) daten++;
while (len--) { while (len--) {
@@ -39,7 +43,7 @@ unsigned short crc16_ccitt(unsigned char *daten, int len, bool skipfirst)
crc ^= ((crc & 0xff) << 4) << 1; crc ^= ((crc & 0xff) << 4) << 1;
} }
return ~(crc); return ~(crc);
} }
char *rtrim(char *text) char *rtrim(char *text)