[fio.git] / parse.c

/*
 * This file contains the ini and command liner parser main.
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <limits.h>

#include "parse.h"

static unsigned long get_mult_time(char c)
{
	switch (c) {
		case 'm':
		case 'M':
			return 60;
		case 'h':
		case 'H':
			return 60 * 60;
		case 'd':
		case 'D':
			return 24 * 60 * 60;
		default:
			return 1;
	}
}

static unsigned long get_mult_bytes(char c)
{
	switch (c) {
		case 'k':
		case 'K':
			return 1024;
		case 'm':
		case 'M':
			return 1024 * 1024;
		case 'g':
		case 'G':
			return 1024 * 1024 * 1024;
		default:
			return 1;
	}
}

/*
 * convert string into decimal value, noting any size suffix
 */
static int str_to_decimal(char *p, unsigned long long *val, int kilo)
{
	char *str = p;
	int len;

	len = strlen(str);

	*val = strtoul(str, NULL, 10);
	if (*val == ULONG_MAX && errno == ERANGE)
		return 1;

	if (kilo)
		*val *= get_mult_bytes(str[len - 1]);
	else
		*val *= get_mult_time(str[len - 1]);
	return 0;
}

static int check_str_bytes(char *p, unsigned long long *val)
{
	return str_to_decimal(p, val, 1);
}

static int check_str_time(char *p, unsigned long long *val)
{
	return str_to_decimal(p, val, 0);
}

void strip_blank_front(char **p)
{
	char *s = *p;

	while (isspace(*s))
		s++;
}

void strip_blank_end(char *p)
{
	char *s = p + strlen(p) - 1;

	while (isspace(*s) || iscntrl(*s))
		s--;

	*(s + 1) = '\0';
}

static int check_range_bytes(char *str, unsigned long *val)
{
	char suffix;

	if (sscanf(str, "%lu%c", val, &suffix) == 2) {
		*val *= get_mult_bytes(suffix);
		return 0;
	}

	if (sscanf(str, "%lu", val) == 1)
		return 0;

	return 1;
}

static int check_int(char *p, unsigned int *val)
{
	if (sscanf(p, "%u", val) == 1)
		return 0;

	return 1;
}

static struct fio_option *find_option(struct fio_option *options,
				      const char *opt)
{
	struct fio_option *o = &options[0];

	while (o->name) {
		if (!strcmp(o->name, opt))
			return o;

		o++;
	}

	return NULL;
}

static int handle_option(struct fio_option *o, char *ptr, void *data)
{
	unsigned int il, *ilp;
	unsigned long long ull, *ullp;
	unsigned long ul1, ul2, *ulp1, *ulp2;
	char *tmpbuf, **cp;
	int ret = 0, is_time = 0;

	tmpbuf = malloc(4096);

	switch (o->type) {
	case FIO_OPT_STR: {
		fio_opt_str_fn *fn = o->cb;

		ret = fn(data, ptr);
		break;
	}
	case FIO_OPT_STR_VAL_TIME:
		is_time = 1;
	case FIO_OPT_STR_VAL: {
		fio_opt_str_val_fn *fn = o->cb;

		if (is_time)
			ret = check_str_time(ptr, &ull);
		else
			ret = check_str_bytes(ptr, &ull);

		if (ret)
			break;

		if (o->max_val && ull > o->max_val)
			ull = o->max_val;

		if (fn)
			ret = fn(data, &ull);
		else {
			ullp = td_var(data, o->off1);
			*ullp = ull;
		}
		break;
	}
	case FIO_OPT_STR_STORE:
		cp = td_var(data, o->off1);
		*cp = strdup(ptr);
		break;
	case FIO_OPT_RANGE: {
		char *p1, *p2;

		p1 = strchr(ptr, '-');
		if (!p1) {
			ret = 1;
			break;
		}

		p2 = p1 + 1;
		*p1 = '\0';

		ret = 1;
		if (!check_range_bytes(p1, &ul1) && !check_range_bytes(p2, &ul2)) {
			ret = 0;
			ulp1 = td_var(data, o->off1);
			ulp2 = td_var(data, o->off2);
			if (ul1 > ul2) {
				*ulp1 = ul2;
				*ulp2 = ul1;
			} else {
				*ulp2 = ul2;
				*ulp1 = ul1;
			}
		}	
			
		break;
	}
	case FIO_OPT_INT: {
		fio_opt_int_fn *fn = o->cb;

		ret = check_int(ptr, &il);
		if (ret)
			break;

		if (o->max_val && il > o->max_val)
			il = o->max_val;

		if (fn)
			ret = fn(data, &il);
		else {
			ilp = td_var(data, o->off1);
			*ilp = il;
		}
		break;
	}
	case FIO_OPT_STR_SET: {
		fio_opt_str_set_fn *fn = o->cb;

		if (fn)
			ret = fn(data);
		else {
			ilp = td_var(data, o->off1);
			*ilp = 1;
		}
		break;
	}
	default:
		fprintf(stderr, "Bad option type %d\n", o->type);
		ret = 1;
	}

	free(tmpbuf);
	return ret;
}

int parse_option(const char *opt, struct fio_option *options, void *data)
{
	struct fio_option *o = find_option(options, opt);
	char *pre, *post;
	char tmp[64];

	strcpy(tmp, opt);

	pre = strchr(tmp, '=');
	if (pre) {
		post = pre;
		*pre = '\0';
		pre = tmp;
		post++;
		o = find_option(options, pre);
	} else {
		o = find_option(options, tmp);
		post = NULL;
	}

	if (!o) {
		fprintf(stderr, "Bad option %s\n", tmp);
		return 1;
	}

	return handle_option(o, post, data);
}
Commit	Line	Data
cb2c86fd JA	1	/*
	2	* This file contains the ini and command liner parser main.
	3	*/
	4	#include <stdio.h>
	5	#include <stdlib.h>
	6	#include <unistd.h>
	7	#include <ctype.h>
	8	#include <string.h>
	9	#include <errno.h>
	10	#include <limits.h>
	11
	12	#include "parse.h"
	13
	14	static unsigned long get_mult_time(char c)
	15	{
	16	switch (c) {
	17	case 'm':
	18	case 'M':
	19	return 60;
	20	case 'h':
	21	case 'H':
	22	return 60 * 60;
	23	case 'd':
	24	case 'D':
	25	return 24 * 60 * 60;
	26	default:
	27	return 1;
	28	}
	29	}
	30
	31	static unsigned long get_mult_bytes(char c)
	32	{
	33	switch (c) {
	34	case 'k':
	35	case 'K':
	36	return 1024;
	37	case 'm':
	38	case 'M':
	39	return 1024 * 1024;
	40	case 'g':
	41	case 'G':
	42	return 1024 * 1024 * 1024;
	43	default:
	44	return 1;
	45	}
	46	}
	47
	48	/*
e1f36503	49	* convert string into decimal value, noting any size suffix
cb2c86fd JA	50	*/
	51	static int str_to_decimal(char p, unsigned long long val, int kilo)
	52	{
e1f36503	53	char *str = p;
cb2c86fd JA	54	int len;
cb2c86fd JA	55
cb2c86fd JA	56	len = strlen(str);
	57
	58	*val = strtoul(str, NULL, 10);
	59	if (*val == ULONG_MAX && errno == ERANGE)
	60	return 1;
	61
	62	if (kilo)
	63	val = get_mult_bytes(str[len - 1]);
	64	else
	65	val = get_mult_time(str[len - 1]);
	66	return 0;
	67	}
	68
e1f36503	69	static int check_str_bytes(char p, unsigned long long val)
cb2c86fd	70	{
cb2c86fd JA	71	return str_to_decimal(p, val, 1);
	72	}
	73
e1f36503	74	static int check_str_time(char p, unsigned long long val)
cb2c86fd	75	{
cb2c86fd JA	76	return str_to_decimal(p, val, 0);
	77	}
	78
	79	void strip_blank_front(char **p)
	80	{
	81	char s = p;
	82
	83	while (isspace(*s))
	84	s++;
	85	}
	86
	87	void strip_blank_end(char *p)
	88	{
	89	char *s = p + strlen(p) - 1;
	90
	91	while (isspace(s) \|\| iscntrl(s))
	92	s--;
	93
	94	*(s + 1) = '\0';
	95	}
	96
e1f36503	97	static int check_range_bytes(char str, unsigned long val)
cb2c86fd JA	98	{
	99	char suffix;
	100
	101	if (sscanf(str, "%lu%c", val, &suffix) == 2) {
	102	val = get_mult_bytes(suffix);
	103	return 0;
	104	}
	105
	106	if (sscanf(str, "%lu", val) == 1)
	107	return 0;
	108
	109	return 1;
	110	}
	111
33963c6c	112	static int check_int(char p, unsigned int val)
cb2c86fd	113	{
e1f36503 JA	114	if (sscanf(p, "%u", val) == 1)
e1f36503 JA	115	return 0;
cb2c86fd	116
e1f36503 JA	117	return 1;
e1f36503 JA	118	}
cb2c86fd	119
e1f36503 JA	120	static struct fio_option find_option(struct fio_option options,
	121	const char *opt)
	122	{
33963c6c	123	struct fio_option *o = &options[0];
cb2c86fd	124
33963c6c	125	while (o->name) {
e1f36503 JA	126	if (!strcmp(o->name, opt))
e1f36503 JA	127	return o;
cb2c86fd	128
33963c6c JA	129	o++;
33963c6c JA	130	}
cb2c86fd	131
e1f36503	132	return NULL;
cb2c86fd JA	133	}
cb2c86fd JA	134
e1f36503	135	static int handle_option(struct fio_option o, char ptr, void *data)
cb2c86fd	136	{
e1f36503 JA	137	unsigned int il, *ilp;
	138	unsigned long long ull, *ullp;
	139	unsigned long ul1, ul2, ulp1, ulp2;
	140	char tmpbuf, *cp;
	141	int ret = 0, is_time = 0;
cb2c86fd	142
e1f36503	143	tmpbuf = malloc(4096);
cb2c86fd	144
e1f36503 JA	145	switch (o->type) {
	146	case FIO_OPT_STR: {
	147	fio_opt_str_fn *fn = o->cb;
cb2c86fd	148
e1f36503 JA	149	ret = fn(data, ptr);
	150	break;
	151	}
	152	case FIO_OPT_STR_VAL_TIME:
	153	is_time = 1;
	154	case FIO_OPT_STR_VAL: {
	155	fio_opt_str_val_fn *fn = o->cb;
	156
	157	if (is_time)
	158	ret = check_str_time(ptr, &ull);
	159	else
	160	ret = check_str_bytes(ptr, &ull);
	161
	162	if (ret)
	163	break;
	164
	165	if (o->max_val && ull > o->max_val)
	166	ull = o->max_val;
	167
	168	if (fn)
	169	ret = fn(data, &ull);
	170	else {
	171	ullp = td_var(data, o->off1);
	172	*ullp = ull;
	173	}
	174	break;
	175	}
	176	case FIO_OPT_STR_STORE:
	177	cp = td_var(data, o->off1);
	178	*cp = strdup(ptr);
	179	break;
	180	case FIO_OPT_RANGE: {
	181	char p1, p2;
	182
	183	p1 = strchr(ptr, '-');
	184	if (!p1) {
	185	ret = 1;
	186	break;
	187	}
	188
	189	p2 = p1 + 1;
	190	*p1 = '\0';
	191
	192	ret = 1;
	193	if (!check_range_bytes(p1, &ul1) && !check_range_bytes(p2, &ul2)) {
	194	ret = 0;
	195	ulp1 = td_var(data, o->off1);
	196	ulp2 = td_var(data, o->off2);
	197	if (ul1 > ul2) {
	198	*ulp1 = ul2;
	199	*ulp2 = ul1;
	200	} else {
	201	*ulp2 = ul2;
	202	*ulp1 = ul1;
	203	}
	204	}
	205
	206	break;
	207	}
	208	case FIO_OPT_INT: {
	209	fio_opt_int_fn *fn = o->cb;
	210
	211	ret = check_int(ptr, &il);
	212	if (ret)
213	break;
214
215	if (o->max_val && il > o->max_val)
216	il = o->max_val;
217
218	if (fn)
219	ret = fn(data, &il);
220	else {
221	ilp = td_var(data, o->off1);
222	*ilp = il;
223	}
224	break;
225	}
226	case FIO_OPT_STR_SET: {
227	fio_opt_str_set_fn *fn = o->cb;
228
229	if (fn)
230	ret = fn(data);
231	else {
232	ilp = td_var(data, o->off1);
233	*ilp = 1;
234	}
235	break;
236	}
237	default:
238	fprintf(stderr, "Bad option type %d\n", o->type);
239	ret = 1;
240	}
cb2c86fd	241
e1f36503 JA	242	free(tmpbuf);
e1f36503 JA	243	return ret;
cb2c86fd JA	244	}
cb2c86fd JA	245
e1f36503	246	int parse_option(const char opt, struct fio_option options, void *data)
cb2c86fd	247	{
e1f36503 JA	248	struct fio_option *o = find_option(options, opt);
	249	char pre, post;
	250	char tmp[64];
	251
	252	strcpy(tmp, opt);
	253
	254	pre = strchr(tmp, '=');
	255	if (pre) {
	256	post = pre;
	257	*pre = '\0';
	258	pre = tmp;
	259	post++;
	260	o = find_option(options, pre);
	261	} else {
	262	o = find_option(options, tmp);
	263	post = NULL;
	264	}
cb2c86fd	265
e1f36503 JA	266	if (!o) {
	267	fprintf(stderr, "Bad option %s\n", tmp);
	268	return 1;
	269	}
	270
	271	return handle_option(o, post, data);
	272	}