misra: implement rule 21.16
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@ -3522,6 +3522,26 @@ class MisraChecker:
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continue
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self.reportError(token, 21, 15)
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def misra_21_16(self, cfg):
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for token in cfg.tokenlist:
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if token.str != 'memcmp':
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continue
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name, args = cppcheckdata.get_function_call_name_args(token)
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if name is None:
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continue
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if len(args) != 3:
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continue
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for arg in args[:2]:
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if arg.valueType is None:
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continue
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if arg.valueType.pointer > 1:
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continue
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if arg.valueType.sign in ('unsigned', 'signed'):
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continue
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if arg.valueType.isEnum():
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continue
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self.reportError(token, 21, 16)
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def misra_21_21(self, cfg):
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for token in cfg.tokenlist:
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if token.str == 'system':
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@ -4168,6 +4188,7 @@ class MisraChecker:
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self.executeCheck(2112, self.misra_21_12, cfg)
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self.executeCheck(2114, self.misra_21_14, cfg)
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self.executeCheck(2115, self.misra_21_15, cfg)
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self.executeCheck(2116, self.misra_21_16, cfg)
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self.executeCheck(2121, self.misra_21_21, cfg)
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# 22.4 is already covered by Cppcheck writeReadOnlyFile
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self.executeCheck(2205, self.misra_22_5, cfg)
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@ -1652,7 +1652,7 @@ static void misra_21_12(void) {
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static void misra_21_14(uint8_t *x) {
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(void)strcpy(x, "123");
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(void)memcmp(x, y, 100); // 21.14
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(void)memcmp("abc", y, 100); // 21.14
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(void)memcmp("abc", y, 100); // 21.14 21.16
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}
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static void misra_21_15(uint8_t *x, uint16_t *y) {
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@ -1661,6 +1661,14 @@ static void misra_21_15(uint8_t *x, uint16_t *y) {
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(void)memcmp(x, y, 10); // 21.15
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}
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struct misra_21_16_S { int a; int b; };
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static void misra_21_16_f1(struct misra_21_16_S *s1, struct misra_21_16_S *s2) {
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(void)memcmp(s1, s2, 10); // 21.16
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}
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static void misra_21_16_f2(char *x, char *y) {
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(void)memcmp(x, y, 10); // 21.16
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}
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// Large arrays for R13.1. Size exceeds default Python's max recursion depth.
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static uint8_t misra_13_1_large_ok[1024] = {
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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