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#include "git-compat-util.h"
#include "parse-options.h"
#include "cache.h"
#include "commit.h"
#include "color.h"
#include "string-list.h"

/*----- some often used options -----*/

int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
{
int v;

if (!arg) {
v = unset ? 0 : DEFAULT_ABBREV;
} else {
v = strtol(arg, (char **)&arg, 10);
if (*arg)
return opterror(opt, "expects a numerical value", 0);
if (v && v < MINIMUM_ABBREV)
v = MINIMUM_ABBREV;
else if (v > 40)
v = 40;
}
*(int *)(opt->value) = v;
return 0;
}

int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
int unset)
{
*(unsigned long *)(opt->value) = approxidate(arg);
return 0;
}

int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
int unset)
{
int value;

if (!arg)
arg = unset ? "never" : (const char *)opt->defval;
value = git_config_colorbool(NULL, arg);
if (value < 0)
return opterror(opt,
"expects \"always\", \"auto\", or \"never\"", 0);
*(int *)opt->value = value;
return 0;
}

int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
int unset)
{
int *target = opt->value;

if (unset)
/* --no-quiet, --no-verbose */
*target = 0;
else if (opt->short_name == 'v') {
if (*target >= 0)
(*target)++;
else
*target = 1;
} else {
if (*target <= 0)
(*target)--;
else
*target = -1;
}
return 0;
}

int parse_opt_with_commit(const struct option *opt, const char *arg, int unset)
{
unsigned char sha1[20];
struct commit *commit;

if (!arg)
return -1;
if (get_sha1(arg, sha1))
return error("malformed object name %s", arg);
commit = lookup_commit_reference(sha1);
if (!commit)
return error("no such commit %s", arg);
commit_list_insert(commit, opt->value);
return 0;
}

int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
{
int *target = opt->value;
*target = unset ? 2 : 1;
return 0;
}

int parse_options_concat(struct option *dst, size_t dst_size, struct option *src)
{
int i, j;

for (i = 0; i < dst_size; i++)
if (dst[i].type == OPTION_END)
break;
for (j = 0; i < dst_size; i++, j++) {
dst[i] = src[j];
if (src[j].type == OPTION_END)
return 0;
}
return -1;
}

int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
{
struct string_list *v = opt->value;

if (unset) {
string_list_clear(v, 0);
return 0;
}

if (!arg)
return -1;

string_list_append(v, xstrdup(arg));
return 0;
}

int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
{
return 0;
}
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