Expert C Programming Deep C Secrets -

struct char c; // offset 0 int i; // offset 4 (padded 3 bytes after c) short s; // offset 8 // total size often 12 (pad to multiple of 4) sizeof(struct) may be larger than the sum of member sizes. 6. The setjmp / longjmp Non-Local Jump Analogous to goto across functions, but dangerous:

For modern C developers, these lessons remain critical—C is still the system programming lingua franca for kernels, embedded systems, and high-performance libraries. Van der Linden’s book is not a reference, but a guide to the traps —and knowing the traps is the mark of an expert. expert c programming deep c secrets

jmp_buf buf; if (setjmp(buf) == 0) // initial call deep_function(); else // returned from longjmp struct char c; // offset 0 int i;