The argv-array API allows one to dynamically build and store
NULL-terminated lists.  An argv-array maintains the invariant that the
argv member always points to a non-NULL array, and that the array is
always NULL-terminated at the element pointed to by argv[argc]. This
makes the result suitable for passing to functions expecting to receive
argv from main(), or the run-command API.
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 argv_array manages its own memory. Any strings pushed into the
array are duplicated, and all memory is freed by argv_array_clear().
Data Structures
- 
struct argv_array
- 
A single array. This should be initialized by assignment from ARGV_ARRAY_INIT, or by callingargv_array_init. Theargvmember contains the actual array; theargcmember contains the number of elements in the array, not including the terminating NULL.
Functions
- 
argv_array_init
- 
Initialize an array. This is no different than assigning from ARGV_ARRAY_INIT.
- 
argv_array_push
- 
Push a copy of a string onto the end of the array. 
- 
argv_array_pushl
- 
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.
- 
argv_array_pushf
- 
Format a string and push it onto the end of the array. This is a convenience wrapper combining strbuf_addfandargv_array_push.
- 
argv_array_pushv
- 
Push a null-terminated array of strings onto the end of the array. 
- 
argv_array_pop
- 
Remove the final element from the array. If there are no elements in the array, do nothing. 
- 
argv_array_clear
- 
Free all memory associated with the array and return it to the initial, empty state. 
- 
argv_array_detach
- 
Disconnect the argvmember from theargv_arraystruct and return it. The caller is responsible for freeing the memory used by the array, and by the strings it references. After detaching, theargv_arrayis in a reinitialized state and can be pushed into again.