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In this example, a bitwise complement of port is first computed and then shifted 4 bits to the right. If both of these operations are performed on an 8-bit unsigned integer, then result_8 will have the value 0x0a. However, port is first promoted to a signed int, with the following results (on a typical architecture where type int is 32 bits wide):
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Compliant Solution
In this compliant solution, the bitwise complement of port is converted back to 8 bits. Consequently, result_8 is assigned the expected value of 0x0aU.
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Tool | Version | Checker | Description | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Astrée |
| Supported | |||||||||||||
| CodeSonar |
| ALLOC.SIZE.TRUNC LANG.CAST.COERCE LANG.CAST.VALUE MISC.MEM.SIZE.TRUNC | Truncation of Allocation Size Coercion Alters Value Cast Alters Value Truncation of Size | ||||||||||||
| CC2.INT02 | Fully implemented | |||||||||||||
| Helix QAC |
| C1250, C1251, C1252, C1253, C1256, C1257, C1260, C1263, C1266, C1274, C1290, C1291, C1292, C1293, C1294, C1295, C1296, C1297, C1298, C1299, C1800, C1802, C1803, C1804, C1810, C1811, C1812, C1813, C1820, C1821, C1822, C1823, C1824, C1830, C1831, C1832, C1833, C1834, C1840, C1841, C1842, C1843, C1844, C1850, C1851, C1852, C1853, C1854, C1860, C1861, C1862, C1863, C1864, C1880, C1881, C1882, C2100, C2101, C2102, C2103, C2104, C2105, C2106, C2107, C2109, C2110, C2111, C2112, C2113, C2114, C2115, C2116, C2117, C2118, C2119, C2120, C2122, C2124, C2130, C2132, C2134, C4401, C4402, C4403, C4404, C4405, C4410, C4412, C4413, C4414, C4415, C4420, C4421, C4422, C4423, C4424, C4425, C4430, C4431, C4432, C4434, C4435, C4436, C4437, C4440, C4441, C4442, C4443, C4445, C4446, C4447, C4460, C4461, C4463, C4464, C4470, C4471, C4480, C4481 | |||||||||||||
| Klocwork |
| MISRA.CAST.INT MISRA.CAST.UNSIGNED_BITS MISRA.CONV.INT.SIGN MISRA.CVALUE.IMPL.CAST MISRA.UMINUS.UNSIGNED PRECISION.LOSS | |||||||||||||
| LDRA tool suite |
| 52 S, 93 S, 96 S, 101 S, 107 S, 332 S, 334 S, 433 S, 434 S, 446 S, 452 S, 457 S, 458 S | Fully implemented | ||||||||||||
| Parasoft C/C++test |
| CERT_C-INT02-a | Implicit conversions from wider to narrower integral type which may result in a loss of information shall not be used | ||||||||||||
| PC-lint Plus |
| 501, 502, 569, 570, 573, | Partially supported | ||||||||||||
| Polyspace Bug Finder |
| Checks for sign change integer conversion overflow (rec. fully supported) | |||||||||||||
| PRQA QA-C | |||||||||||||||
| Include Page | PRQA QA-C_v | PRQA QA-C_v | 1250, 1251, 1252, 1253, 1256, 1257, 1260, 1263, 1266, 1274, 1290, 1291, 1292, 1293, 1294, 1295, 1296, 1297, 1298, 1299, 1800, 1802, 1803, 1804, 1810, 1811, 1812, 1813, 1820, 1821, 1822, 1823, 1824, 1830, 1831, 1832, 1833, 1834, 1840, 1841, 1842, 1843, 1844, 1850, 1851, 1852, 1853, 1854, 1860, 1861, 1862, 1863, 1864, 1880, 1881, 1882, 2100, 2101, 2102, 2103, 2104, 2105, 2106, 2107, 2109, 2110, 2111, 2112, 2113, 2114, 2115, 2116, 2117, 2118, 2119, 2120, 2122, 2124, 2130, 2132, 2134, 4401, 4402, 4403, 4404, 4405, 4410, 4412, 4413, 4414, 4415, 4420, 4421, 4422, 4423, 4424, 4425, 4430, 4431, 4432, 4434, 4435, 4436, 4437, 4440, 4441, 4442, 4443, 4445, 4446, 4447, 4460, 4461, 4463, 4464, 4470, 4471, 4480, 4481 | Fully implemented | PVS-Studio |
| V555, V605, V673, V5006 |
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