diff options
Diffstat (limited to 'strbuf.h')
| -rw-r--r-- | strbuf.h | 74 |
1 files changed, 37 insertions, 37 deletions
@@ -13,44 +13,44 @@ * * strbufs have some invariants that are very important to keep in mind: * - * . The `buf` member is never NULL, so it can be used in any usual C - * string operations safely. strbuf's _have_ to be initialized either by - * `strbuf_init()` or by `= STRBUF_INIT` before the invariants, though. - * + - * Do *not* assume anything on what `buf` really is (e.g. if it is - * allocated memory or not), use `strbuf_detach()` to unwrap a memory - * buffer from its strbuf shell in a safe way. That is the sole supported - * way. This will give you a malloced buffer that you can later `free()`. - * + - * However, it is totally safe to modify anything in the string pointed by - * the `buf` member, between the indices `0` and `len-1` (inclusive). + * - The `buf` member is never NULL, so it can be used in any usual C + * string operations safely. strbuf's _have_ to be initialized either by + * `strbuf_init()` or by `= STRBUF_INIT` before the invariants, though. * - * . The `buf` member is a byte array that has at least `len + 1` bytes - * allocated. The extra byte is used to store a `'\0'`, allowing the - * `buf` member to be a valid C-string. Every strbuf function ensure this - * invariant is preserved. - * + - * NOTE: It is OK to "play" with the buffer directly if you work it this - * way: - * + - * ---- - * strbuf_grow(sb, SOME_SIZE); <1> - * strbuf_setlen(sb, sb->len + SOME_OTHER_SIZE); - * ---- - * <1> Here, the memory array starting at `sb->buf`, and of length - * `strbuf_avail(sb)` is all yours, and you can be sure that - * `strbuf_avail(sb)` is at least `SOME_SIZE`. - * + - * NOTE: `SOME_OTHER_SIZE` must be smaller or equal to `strbuf_avail(sb)`. - * + - * Doing so is safe, though if it has to be done in many places, adding the - * missing API to the strbuf module is the way to go. - * + - * WARNING: Do _not_ assume that the area that is yours is of size `alloc - * - 1` even if it's true in the current implementation. Alloc is somehow a - * "private" member that should not be messed with. Use `strbuf_avail()` - * instead. - */ + * Do *not* assume anything on what `buf` really is (e.g. if it is + * allocated memory or not), use `strbuf_detach()` to unwrap a memory + * buffer from its strbuf shell in a safe way. That is the sole supported + * way. This will give you a malloced buffer that you can later `free()`. + * + * However, it is totally safe to modify anything in the string pointed by + * the `buf` member, between the indices `0` and `len-1` (inclusive). + * + * - The `buf` member is a byte array that has at least `len + 1` bytes + * allocated. The extra byte is used to store a `'\0'`, allowing the + * `buf` member to be a valid C-string. Every strbuf function ensure this + * invariant is preserved. + * + * NOTE: It is OK to "play" with the buffer directly if you work it this + * way: + * + * ---- + * strbuf_grow(sb, SOME_SIZE); <1> + * strbuf_setlen(sb, sb->len + SOME_OTHER_SIZE); + * ---- + * <1> Here, the memory array starting at `sb->buf`, and of length + * `strbuf_avail(sb)` is all yours, and you can be sure that + * `strbuf_avail(sb)` is at least `SOME_SIZE`. + * + * NOTE: `SOME_OTHER_SIZE` must be smaller or equal to `strbuf_avail(sb)`. + * + * Doing so is safe, though if it has to be done in many places, adding the + * missing API to the strbuf module is the way to go. + * + * WARNING: Do _not_ assume that the area that is yours is of size `alloc + * - 1` even if it's true in the current implementation. Alloc is somehow a + * "private" member that should not be messed with. Use `strbuf_avail()` + * instead. +*/ /** * Data Structures |