| # Memory Character Search | |
| ## Problem Description | |
| Find the first occurrence of a byte value in a fixed-size memory region. | |
| ## Input | |
| The functions receive character pointers and any byte value or length arguments described by their C signatures. | |
| ## Output | |
| Each function returns or writes the result prescribed by the corresponding standard string or memory operation. | |
| ## Constraints | |
| Strings, byte arrays, capacities, and integer arguments satisfy the validity and bounds stated by each function contract. | |
| ## Source | |
| C string-library benchmark adapted by the QCP LLM benchmark suite. | |