Improve mapping of SQL integer types to C corresponding types #370
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mloskot
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Porting nanodbc#370 Fine-grained mapping of SQL integer types to C corresponding types Add reading of missing C data types for integers Distinguish SQL_C_BIT data type for reading Prefer mapping of SQL_C_* types to fixed-width integer types Ensure SQL_C_SHORT and SQL_C_LONG are mapped to fixed-width variant types test: Catch up with improved integer types mapping Refine reading of SQL_C_TINYINT into int8_t instead of int16_t The int16_t may lead to numeric garbage for values at range boundaries. tests: Refine SQLite tests for integer types
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Porting nanodbc#370 Fine-grained mapping of SQL integer types to C corresponding types Add reading of missing C data types for integers Distinguish SQL_C_BIT data type for reading Prefer mapping of SQL_C_* types to fixed-width integer types Ensure SQL_C_SHORT and SQL_C_LONG are mapped to fixed-width variant types test: Catch up with improved integer types mapping Refine reading of SQL_C_TINYINT into int8_t instead of int16_t The int16_t may lead to numeric garbage for values at range boundaries. tests: Refine SQLite tests for integer types Fix size of output value read for SQL_C_BIT data
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![github-advanced-security[bot]](https://avatars.githubusercontent.com/in/57789?s=60&v=4){kind=small}
| break; | ||
| case SQL_C_LONG: | ||
| case SQL_C_SLONG: | ||
| result = *(ensure_pdata<int32_t>(column)); | ||
| { | ||
| long d = *(ensure_pdata<int32_t>(column)); |
Check warning
Code scanning / PREfast
The variable 'd' does not change after construction, mark it as const (con.4). Warning
The int16_t may lead to numeric garbage for values at range boundaries.
Types, especially SQL_TINYINT, can be signed or unsigned which is implementation-specific behaviour. The best bet is to ask column descriptor for column signedness and refine output C type and buffer size.
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References
Closes #369