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#include "common.h"

#include "args.h"

size_t is_prefixed(const char *str, const char *pfx)

{

size_t len = strlen(pfx);

return strncmp(str, pfx, len) ? 0 : len;

}

int optional_str_arg(

const char **out, struct args_info *args, const char *opt, const char *def)

{

const char *found = args->argv[args->pos];

size_t len = is_prefixed(found, opt);

if (!len)

return 0;

if (!found[len]) {

if (args->pos + 1 == args->argc) {

*out = def;

return 1;

}

args->pos += 1;

*out = args->argv[args->pos];

return 1;

}

if (found[len] == '=') {

*out = found + len + 1;

return 1;

}

return 0;

}

int match_str_arg(

const char **out, struct args_info *args, const char *opt)

{

const char *found = args->argv[args->pos];

size_t len = is_prefixed(found, opt);

if (!len)

return 0;

if (!found[len]) {

if (args->pos + 1 == args->argc)

fatal("expected value following argument", opt);

args->pos += 1;

*out = args->argv[args->pos];

return 1;

}

if (found[len] == '=') {

*out = found + len + 1;

return 1;

}

return 0;

}

static const char *match_numeric_arg(struct args_info *args, const char *opt)

{

const char *found = args->argv[args->pos];

size_t len = is_prefixed(found, opt);

if (!len)

return NULL;

if (!found[len]) {

if (args->pos + 1 == args->argc)

fatal("expected numeric value following argument", opt);

args->pos += 1;

found = args->argv[args->pos];

} else {

found = found + len;

if (*found == '=')

found++;

}

return found;

}

int match_uint16_arg(

uint16_t *out, struct args_info *args, const char *opt)

{

const char *found = match_numeric_arg(args, opt);

uint16_t val;

char *endptr = NULL;

if (!found)

return 0;

val = (uint16_t)strtoul(found, &endptr, 0);

if (!endptr || *endptr != '\0')

fatal("expected number after argument", opt);

if (out)

*out = val;

return 1;

}

int match_uint32_arg(

uint32_t *out, struct args_info *args, const char *opt)

{

const char *found = match_numeric_arg(args, opt);

uint16_t val;

char *endptr = NULL;

if (!found)

return 0;

val = (uint32_t)strtoul(found, &endptr, 0);

if (!endptr || *endptr != '\0')

fatal("expected number after argument", opt);

if (out)

*out = val;

return 1;

}

static int match_int_internal(

int *out, const char *str, int allow_negative, const char *opt)

{

char *endptr = NULL;

int val = (int)strtol(str, &endptr, 10);

if (!endptr || *endptr != '\0')

fatal("expected number", opt);

else if (val < 0 && !allow_negative)

fatal("negative values are not allowed", opt);

if (out)

*out = val;

return 1;

}

int match_bool_arg(int *out, struct args_info *args, const char *opt)

{

const char *found = args->argv[args->pos];

if (!strcmp(found, opt)) {

*out = 1;

return 1;

}

if (!strncmp(found, "--no-", strlen("--no-")) &&

!strcmp(found + strlen("--no-"), opt + 2)) {

*out = 0;

return 1;

}

*out = -1;

return 0;

}

int is_integer(int *out, const char *str, int allow_negative)

{

return match_int_internal(out, str, allow_negative, NULL);

}

int match_int_arg(

int *out, struct args_info *args, const char *opt, int allow_negative)

{

const char *found = match_numeric_arg(args, opt);

if (!found)

return 0;

return match_int_internal(out, found, allow_negative, opt);

}

int match_arg_separator(struct args_info *args)

{

if (args->opts_done)

return 1;

if (strcmp(args->argv[args->pos], "--") != 0)

return 0;

args->opts_done = 1;

args->pos++;

return 1;

}

void strarray_from_args(git_strarray *array, struct args_info *args)

{

size_t i;

array->count = args->argc - args->pos;

array->strings = calloc(array->count, sizeof(char *));

assert(array->strings != NULL);

for (i = 0; args->pos < args->argc; ++args->pos) {

array->strings[i++] = args->argv[args->pos];

}

args->pos = args->argc;

}