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fd93d2e60e
An empty argv-array is initialized to point to a static empty NULL-terminated array. The original implementation separates the actual storage of the NULL-terminator from the pointer to the list. This makes the exposed type a "const char **", which nicely matches the type stored by the argv-array. However, this indirection means that one cannot use empty_argv to initialize a static variable, since it is not a constant. Instead, we can expose empty_argv directly, as an array of pointers. The only place we use it is in the ARGV_ARRAY_INIT initializer, and it decays to a pointer appropriately there. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
51 lines
1 KiB
C
51 lines
1 KiB
C
#include "cache.h"
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#include "argv-array.h"
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#include "strbuf.h"
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const char *empty_argv[] = { NULL };
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void argv_array_init(struct argv_array *array)
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{
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array->argv = empty_argv;
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array->argc = 0;
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array->alloc = 0;
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}
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static void argv_array_push_nodup(struct argv_array *array, const char *value)
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{
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if (array->argv == empty_argv)
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array->argv = NULL;
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ALLOC_GROW(array->argv, array->argc + 2, array->alloc);
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array->argv[array->argc++] = value;
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array->argv[array->argc] = NULL;
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}
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void argv_array_push(struct argv_array *array, const char *value)
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{
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argv_array_push_nodup(array, xstrdup(value));
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}
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void argv_array_pushf(struct argv_array *array, const char *fmt, ...)
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{
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va_list ap;
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struct strbuf v = STRBUF_INIT;
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va_start(ap, fmt);
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strbuf_vaddf(&v, fmt, ap);
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va_end(ap);
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argv_array_push_nodup(array, strbuf_detach(&v, NULL));
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}
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void argv_array_clear(struct argv_array *array)
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{
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if (array->argv != empty_argv) {
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int i;
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for (i = 0; i < array->argc; i++)
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free((char **)array->argv[i]);
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free(array->argv);
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}
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argv_array_init(array);
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}
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