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#include "flags.h"
#include "lib.h"
#include "stream.h"
#include <strings.h>
static format_t get_file_extension(char *path) {
char *filename = strrchr(path, '/');
if (filename == NULL)
return NBT;
char *extension = strrchr(filename, '.');
if (extension == NULL)
return NBT;
else if (strcasecmp(extension, "json") == 0)
return JSON;
else if (strcasecmp(extension, "snbt") == 0)
return SNBT;
return NBT;
}
void parse_long_arg(flags_t *flags, char *arg) {
char *key = arg + 2;
char *value = strchr(key, '=');
if (value != NULL) {
*value = '\0';
value++;
}
if (strcmp(key, "help") == 0) {
flags->help = true;
return;
}
else if (strcmp(key, "version") == 0) {
flags->version = true;
return;
}
else if (strcmp(key, "in") == 0) {
if (value == NULL)
error_and_die("--in requires a value\n");
flags->in = stream_open(value, "r");
if (flags->__set_fin == false)
flags->fin = get_file_extension(value);
}
else if (strcmp(key, "out") == 0) {
if (value == NULL)
error_and_die("--out requires a value\n");
flags->out = stream_open(value, "w");
if (flags->__set_fout == false)
flags->fout = get_file_extension(value);
}
else {
error_and_die("invalid argument '--%s'\n", key);
}
}
void parse_short_args(flags_t *flags, char *arg, int len) {
for (int i = 1; i < len; i++) {
char c = arg[i];
switch(c) {
case 'j':
flags->fin = JSON;
flags->__set_fin = true;
break;
case 'J':
flags->fout = JSON;
flags->__set_fout = true;
break;
case 's':
flags->fin = SNBT;
break;
case 'S':
flags->fout = SNBT;
break;
case 'n':
flags->fin = NBT;
break;
case 'N':
flags->fout = NBT;
break;
case 'h':
flags->help = true;
break;
case 'v':
flags->version = true;
break;
default:
error_and_die("invalid argument: '-%c'\n", c);
}
}
}
void parse_arg(flags_t *flags, char *arg, int len) {
if (len < 2) {
error_and_die("invalid argument: '%s'\n", arg);
} else if (arg[1] == '-') {
parse_long_arg(flags, arg);
} else {
parse_short_args(flags, arg, len);
}
}
void parse_flags(flags_t *flags, int argc, char **argv) {
flags->__set_fin = false;
flags->__set_fout = false;
flags->help = false;
flags->version = false;
flags->in.__file = stdin;
flags->in.__alloc = false;
flags->out.__file = stdout;
flags->out.__alloc = false;
flags->fin = NBT;
flags->fout = NBT;
int i;
for (i = 1; i < argc; i++) {
char *arg = argv[i];
int len = strlen(arg);
if (len == 2 && arg[0] == '-' && arg[1] == '-') {
break;
} else if (arg[0] != '-') {
i--;
break;
} else {
parse_arg(flags, arg, len);
}
}
if (i + 1 < argc) {
char *arg = argv[i + 1];
flags->in = stream_open(arg, "r");
if (flags->__set_fin == false)
flags->fin = get_file_extension(arg);
}
if (i + 2 < argc) {
char *arg = argv[i + 2];
flags->out = stream_open(arg, "w");
if (flags->__set_fout == false)
flags->fout = get_file_extension(arg);
}
if (i + 3 < argc) {
error_and_die("too many arguments passed\n");
}
}
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