int bin_val, hex_val; sscanf2("1010 FF", "%b %x", &bin_val, &hex_val); // bin_val = 10, hex_val = 255 Example 3: Skip Characters Until a Set char result[50]; sscanf2("abc123def", "%#[0-9]", result); // result = "123" (skips leading letters) Example 4: Fixed Buffer with Overflow Protection char city[20]; int ret = sscanf2("Constantinople", "%19s", city); // width required for safety if (ret == 1) puts(city); // "Constantinople" truncated to 19 chars 5. Error Handling Use sscanf2_strerror() to get readable errors.
#include <stdio.h> #include <stdlib.h> #include <string.h> // Simplified: parse until space, allocate exactly char* parse_dynamic(const char **src) const char *start = *src; while (**src && !isspace(**src)) (*src)++; int len = *src - start; char *out = malloc(len + 1); if (out) memcpy(out, start, len); out[len] = 0; sscanf2
| Return | Meaning | |--------|---------| | 0 | No assignments made | | >0 | Number of successful assignments | | -1 | Invalid format specifier | | -2 | Destination buffer too small (fixed buffer) | | -3 | Argument count mismatch (too few args passed) | 6. Implementing sscanf2 (Conceptual) If you wanted to implement %as yourself: int bin_val, hex_val; sscanf2("1010 FF", "%b %x", &bin_val,