| #ifndef STRVEC_H |
| #define STRVEC_H |
| |
| /** |
| * The strvec API allows one to dynamically build and store |
| * NULL-terminated arrays of strings. A strvec maintains the invariant that the |
| * `v` member always points to a non-NULL array, and that the array is |
| * always NULL-terminated at the element pointed to by `v[nr]`. This |
| * makes the result suitable for passing to functions expecting to receive |
| * argv from main(). |
| * |
| * The string-list API (documented in string-list.h) is similar, but cannot be |
| * used for these purposes; instead of storing a straight string pointer, |
| * it contains an item structure with a `util` field that is not compatible |
| * with the traditional argv interface. |
| * |
| * Each `strvec` manages its own memory. Any strings pushed into the |
| * array are duplicated, and all memory is freed by strvec_clear(). |
| */ |
| |
| extern const char *empty_strvec[]; |
| |
| /** |
| * A single array. This should be initialized by assignment from |
| * `STRVEC_INIT`, or by calling `strvec_init`. The `v` |
| * member contains the actual array; the `nr` member contains the |
| * number of elements in the array, not including the terminating |
| * NULL. |
| */ |
| struct strvec { |
| const char **v; |
| size_t nr; |
| size_t alloc; |
| }; |
| |
| #define STRVEC_INIT { \ |
| .v = empty_strvec, \ |
| } |
| |
| /** |
| * Initialize an array. This is no different than assigning from |
| * `STRVEC_INIT`. |
| */ |
| void strvec_init(struct strvec *); |
| |
| /* Push a copy of a string onto the end of the array. */ |
| const char *strvec_push(struct strvec *, const char *); |
| |
| /** |
| * Format a string and push it onto the end of the array. This is a |
| * convenience wrapper combining `strbuf_addf` and `strvec_push`. |
| */ |
| __attribute__((format (printf,2,3))) |
| const char *strvec_pushf(struct strvec *, const char *fmt, ...); |
| |
| /** |
| * Push a list of strings onto the end of the array. The arguments |
| * should be a list of `const char *` strings, terminated by a NULL |
| * argument. |
| */ |
| LAST_ARG_MUST_BE_NULL |
| void strvec_pushl(struct strvec *, ...); |
| |
| /* Push a null-terminated array of strings onto the end of the array. */ |
| void strvec_pushv(struct strvec *, const char **); |
| |
| /** |
| * Remove the final element from the array. If there are no |
| * elements in the array, do nothing. |
| */ |
| void strvec_pop(struct strvec *); |
| |
| /* Splits by whitespace; does not handle quoted arguments! */ |
| void strvec_split(struct strvec *, const char *); |
| |
| /** |
| * Free all memory associated with the array and return it to the |
| * initial, empty state. |
| */ |
| void strvec_clear(struct strvec *); |
| |
| /** |
| * Disconnect the `v` member from the `strvec` struct and |
| * return it. The caller is responsible for freeing the memory used |
| * by the array, and by the strings it references. After detaching, |
| * the `strvec` is in a reinitialized state and can be pushed |
| * into again. |
| */ |
| const char **strvec_detach(struct strvec *); |
| |
| #endif /* STRVEC_H */ |