[ceph.git] / ceph / src / spdk / dpdk / lib / librte_cfgfile / rte_cfgfile.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <rte_string_fns.h>
#include <rte_common.h>
#include <rte_log.h>

#include "rte_cfgfile.h"

struct rte_cfgfile_section {
	char name[CFG_NAME_LEN];
	int num_entries;
	int allocated_entries;
	struct rte_cfgfile_entry *entries;
};

struct rte_cfgfile {
	int flags;
	int num_sections;
	int allocated_sections;
	struct rte_cfgfile_section *sections;
};

static int cfgfile_logtype;

#define CFG_LOG(level, fmt, args...)					\
	rte_log(RTE_LOG_ ## level, cfgfile_logtype, "%s(): " fmt "\n",	\
		__func__, ## args)

/** when we resize a file structure, how many extra entries
 * for new sections do we add in */
#define CFG_ALLOC_SECTION_BATCH 8
/** when we resize a section structure, how many extra entries
 * for new entries do we add in */
#define CFG_ALLOC_ENTRY_BATCH 16

/**
 * Default cfgfile load parameters.
 */
static const struct rte_cfgfile_parameters default_cfgfile_params = {
	.comment_character = CFG_DEFAULT_COMMENT_CHARACTER,
};

/**
 * Defines the list of acceptable comment characters supported by this
 * library.
 */
static const char valid_comment_chars[] = {
	'!',
	'#',
	'%',
	';',
	'@'
};

static unsigned
_strip(char *str, unsigned len)
{
	int newlen = len;
	if (len == 0)
		return 0;

	if (isspace(str[len-1])) {
		/* strip trailing whitespace */
		while (newlen > 0 && isspace(str[newlen - 1]))
			str[--newlen] = '\0';
	}

	if (isspace(str[0])) {
		/* strip leading whitespace */
		int i, start = 1;
		while (isspace(str[start]) && start < newlen)
			start++
			; /* do nothing */
		newlen -= start;
		for (i = 0; i < newlen; i++)
			str[i] = str[i+start];
		str[i] = '\0';
	}
	return newlen;
}

static struct rte_cfgfile_section *
_get_section(struct rte_cfgfile *cfg, const char *sectionname)
{
	int i;

	for (i = 0; i < cfg->num_sections; i++) {
		if (strncmp(cfg->sections[i].name, sectionname,
				sizeof(cfg->sections[0].name)) == 0)
			return &cfg->sections[i];
	}
	return NULL;
}

static int
_add_entry(struct rte_cfgfile_section *section, const char *entryname,
		const char *entryvalue)
{
	/* resize entry structure if we don't have room for more entries */
	if (section->num_entries == section->allocated_entries) {
		struct rte_cfgfile_entry *n_entries = realloc(
				section->entries,
				sizeof(struct rte_cfgfile_entry) *
				((section->allocated_entries) +
						CFG_ALLOC_ENTRY_BATCH));

		if (n_entries == NULL)
			return -ENOMEM;

		section->entries = n_entries;
		section->allocated_entries += CFG_ALLOC_ENTRY_BATCH;
	}
	/* fill up entry fields with key name and value */
	struct rte_cfgfile_entry *curr_entry =
					&section->entries[section->num_entries];

	strlcpy(curr_entry->name, entryname, sizeof(curr_entry->name));
	strlcpy(curr_entry->value, entryvalue, sizeof(curr_entry->value));
	section->num_entries++;

	return 0;
}

static int
rte_cfgfile_check_params(const struct rte_cfgfile_parameters *params)
{
	unsigned int valid_comment;
	unsigned int i;

	if (!params) {
		CFG_LOG(ERR, "missing cfgfile parameters\n");
		return -EINVAL;
	}

	valid_comment = 0;
	for (i = 0; i < RTE_DIM(valid_comment_chars); i++) {
		if (params->comment_character == valid_comment_chars[i]) {
			valid_comment = 1;
			break;
		}
	}

	if (valid_comment == 0)	{
		CFG_LOG(ERR, "invalid comment characters %c\n",
		       params->comment_character);
		return -ENOTSUP;
	}

	return 0;
}

struct rte_cfgfile *
rte_cfgfile_load(const char *filename, int flags)
{
	return rte_cfgfile_load_with_params(filename, flags,
					    &default_cfgfile_params);
}

struct rte_cfgfile *
rte_cfgfile_load_with_params(const char *filename, int flags,
			     const struct rte_cfgfile_parameters *params)
{
	char buffer[CFG_NAME_LEN + CFG_VALUE_LEN + 4];
	int lineno = 0;
	struct rte_cfgfile *cfg;

	if (rte_cfgfile_check_params(params))
		return NULL;

	FILE *f = fopen(filename, "r");
	if (f == NULL)
		return NULL;

	cfg = rte_cfgfile_create(flags);

	while (fgets(buffer, sizeof(buffer), f) != NULL) {
		char *pos;
		size_t len = strnlen(buffer, sizeof(buffer));
		lineno++;
		if ((len >= sizeof(buffer) - 1) && (buffer[len-1] != '\n')) {
			CFG_LOG(ERR, " line %d - no \\n found on string. "
					"Check if line too long\n", lineno);
			goto error1;
		}
		/* skip parsing if comment character found */
		pos = memchr(buffer, params->comment_character, len);
		if (pos != NULL && (*(pos-1) != '\\')) {
			*pos = '\0';
			len = pos -  buffer;
		}

		len = _strip(buffer, len);
		/* skip lines without useful content */
		if (buffer[0] != '[' && memchr(buffer, '=', len) == NULL)
			continue;

		if (buffer[0] == '[') {
			/* section heading line */
			char *end = memchr(buffer, ']', len);
			if (end == NULL) {
				CFG_LOG(ERR,
					"line %d - no terminating ']' character found\n",
					lineno);
				goto error1;
			}
			*end = '\0';
			_strip(&buffer[1], end - &buffer[1]);

			rte_cfgfile_add_section(cfg, &buffer[1]);
		} else {
			/* key and value line */
			char *split[2] = {NULL};

			split[0] = buffer;
			split[1] = memchr(buffer, '=', len);
			if (split[1] == NULL) {
				CFG_LOG(ERR,
					"line %d - no '=' character found\n",
					lineno);
				goto error1;
			}
			*split[1] = '\0';
			split[1]++;

			_strip(split[0], strlen(split[0]));
			_strip(split[1], strlen(split[1]));
			char *end = memchr(split[1], '\\', strlen(split[1]));

			size_t split_len = strlen(split[1]) + 1;
			while (end != NULL) {
				if (*(end+1) == params->comment_character) {
					*end = '\0';
					strlcat(split[1], end+1, split_len);
				} else
					end++;
				end = memchr(end, '\\', strlen(end));
			}

			if (!(flags & CFG_FLAG_EMPTY_VALUES) &&
					(*split[1] == '\0')) {
				CFG_LOG(ERR,
					"line %d - cannot use empty values\n",
					lineno);
				goto error1;
			}

			if (cfg->num_sections == 0)
				goto error1;

			_add_entry(&cfg->sections[cfg->num_sections - 1],
					split[0], split[1]);
		}
	}
	fclose(f);
	return cfg;
error1:
	rte_cfgfile_close(cfg);
	fclose(f);
	return NULL;
}

struct rte_cfgfile *
rte_cfgfile_create(int flags)
{
	int i;
	struct rte_cfgfile *cfg;

	cfg = malloc(sizeof(*cfg));

	if (cfg == NULL)
		return NULL;

	cfg->flags = flags;
	cfg->num_sections = 0;

	/* allocate first batch of sections and entries */
	cfg->sections = calloc(CFG_ALLOC_SECTION_BATCH,
			       sizeof(struct rte_cfgfile_section));
	if (cfg->sections == NULL)
		goto error1;

	cfg->allocated_sections = CFG_ALLOC_SECTION_BATCH;

	for (i = 0; i < CFG_ALLOC_SECTION_BATCH; i++) {
		cfg->sections[i].entries = calloc(CFG_ALLOC_ENTRY_BATCH,
					  sizeof(struct rte_cfgfile_entry));

		if (cfg->sections[i].entries == NULL)
			goto error1;

		cfg->sections[i].num_entries = 0;
		cfg->sections[i].allocated_entries = CFG_ALLOC_ENTRY_BATCH;
	}

	if (flags & CFG_FLAG_GLOBAL_SECTION)
		rte_cfgfile_add_section(cfg, "GLOBAL");

	return cfg;
error1:
	if (cfg->sections != NULL) {
		for (i = 0; i < cfg->allocated_sections; i++) {
			if (cfg->sections[i].entries != NULL) {
				free(cfg->sections[i].entries);
				cfg->sections[i].entries = NULL;
			}
		}
		free(cfg->sections);
		cfg->sections = NULL;
	}
	free(cfg);
	return NULL;
}

int
rte_cfgfile_add_section(struct rte_cfgfile *cfg, const char *sectionname)
{
	int i;

	if (cfg == NULL)
		return -EINVAL;

	if (sectionname == NULL)
		return -EINVAL;

	/* resize overall struct if we don't have room for more	sections */
	if (cfg->num_sections == cfg->allocated_sections) {

		struct rte_cfgfile_section *n_sections =
				realloc(cfg->sections,
				sizeof(struct rte_cfgfile_section) *
				((cfg->allocated_sections) +
				CFG_ALLOC_SECTION_BATCH));

		if (n_sections == NULL)
			return -ENOMEM;

		for (i = 0; i < CFG_ALLOC_SECTION_BATCH; i++) {
			n_sections[i + cfg->allocated_sections].num_entries = 0;
			n_sections[i +
				 cfg->allocated_sections].allocated_entries = 0;
			n_sections[i + cfg->allocated_sections].entries = NULL;
		}
		cfg->sections = n_sections;
		cfg->allocated_sections += CFG_ALLOC_SECTION_BATCH;
	}

	strlcpy(cfg->sections[cfg->num_sections].name, sectionname,
		sizeof(cfg->sections[0].name));
	cfg->sections[cfg->num_sections].num_entries = 0;
	cfg->num_sections++;

	return 0;
}

int rte_cfgfile_add_entry(struct rte_cfgfile *cfg,
		const char *sectionname, const char *entryname,
		const char *entryvalue)
{
	int ret;

	if ((cfg == NULL) || (sectionname == NULL) || (entryname == NULL)
			|| (entryvalue == NULL))
		return -EINVAL;

	if (rte_cfgfile_has_entry(cfg, sectionname, entryname) != 0)
		return -EEXIST;

	/* search for section pointer by sectionname */
	struct rte_cfgfile_section *curr_section = _get_section(cfg,
								sectionname);
	if (curr_section == NULL)
		return -EINVAL;

	ret = _add_entry(curr_section, entryname, entryvalue);

	return ret;
}

int rte_cfgfile_set_entry(struct rte_cfgfile *cfg, const char *sectionname,
		const char *entryname, const char *entryvalue)
{
	int i;

	if ((cfg == NULL) || (sectionname == NULL) || (entryname == NULL))
		return -EINVAL;

	/* search for section pointer by sectionname */
	struct rte_cfgfile_section *curr_section = _get_section(cfg,
								sectionname);
	if (curr_section == NULL)
		return -EINVAL;

	if (entryvalue == NULL)
		entryvalue = "";

	for (i = 0; i < curr_section->num_entries; i++)
		if (!strcmp(curr_section->entries[i].name, entryname)) {
			strlcpy(curr_section->entries[i].value, entryvalue,
				sizeof(curr_section->entries[i].value));
			return 0;
		}

	CFG_LOG(ERR, "entry name doesn't exist\n");
	return -EINVAL;
}

int rte_cfgfile_save(struct rte_cfgfile *cfg, const char *filename)
{
	int i, j;

	if ((cfg == NULL) || (filename == NULL))
		return -EINVAL;

	FILE *f = fopen(filename, "w");

	if (f == NULL)
		return -EINVAL;

	for (i = 0; i < cfg->num_sections; i++) {
		fprintf(f, "[%s]\n", cfg->sections[i].name);

		for (j = 0; j < cfg->sections[i].num_entries; j++) {
			fprintf(f, "%s=%s\n",
					cfg->sections[i].entries[j].name,
					cfg->sections[i].entries[j].value);
		}
	}
	return fclose(f);
}

int rte_cfgfile_close(struct rte_cfgfile *cfg)
{
	int i;

	if (cfg == NULL)
		return -1;

	if (cfg->sections != NULL) {
		for (i = 0; i < cfg->allocated_sections; i++) {
			if (cfg->sections[i].entries != NULL) {
				free(cfg->sections[i].entries);
				cfg->sections[i].entries = NULL;
			}
		}
		free(cfg->sections);
		cfg->sections = NULL;
	}
	free(cfg);
	cfg = NULL;

	return 0;
}

int
rte_cfgfile_num_sections(struct rte_cfgfile *cfg, const char *sectionname,
size_t length)
{
	int i;
	int num_sections = 0;
	for (i = 0; i < cfg->num_sections; i++) {
		if (strncmp(cfg->sections[i].name, sectionname, length) == 0)
			num_sections++;
	}
	return num_sections;
}

int
rte_cfgfile_sections(struct rte_cfgfile *cfg, char *sections[],
	int max_sections)
{
	int i;

	for (i = 0; i < cfg->num_sections && i < max_sections; i++)
		strlcpy(sections[i], cfg->sections[i].name, CFG_NAME_LEN);

	return i;
}

int
rte_cfgfile_has_section(struct rte_cfgfile *cfg, const char *sectionname)
{
	return _get_section(cfg, sectionname) != NULL;
}

int
rte_cfgfile_section_num_entries(struct rte_cfgfile *cfg,
	const char *sectionname)
{
	const struct rte_cfgfile_section *s = _get_section(cfg, sectionname);
	if (s == NULL)
		return -1;
	return s->num_entries;
}

int
rte_cfgfile_section_num_entries_by_index(struct rte_cfgfile *cfg,
	char *sectionname, int index)
{
	if (index < 0 || index >= cfg->num_sections)
		return -1;

	const struct rte_cfgfile_section *sect = &(cfg->sections[index]);

	strlcpy(sectionname, sect->name, CFG_NAME_LEN);
	return sect->num_entries;
}
int
rte_cfgfile_section_entries(struct rte_cfgfile *cfg, const char *sectionname,
		struct rte_cfgfile_entry *entries, int max_entries)
{
	int i;
	const struct rte_cfgfile_section *sect = _get_section(cfg, sectionname);
	if (sect == NULL)
		return -1;
	for (i = 0; i < max_entries && i < sect->num_entries; i++)
		entries[i] = sect->entries[i];
	return i;
}

int
rte_cfgfile_section_entries_by_index(struct rte_cfgfile *cfg, int index,
		char *sectionname,
		struct rte_cfgfile_entry *entries, int max_entries)
{
	int i;
	const struct rte_cfgfile_section *sect;

	if (index < 0 || index >= cfg->num_sections)
		return -1;
	sect = &cfg->sections[index];
	strlcpy(sectionname, sect->name, CFG_NAME_LEN);
	for (i = 0; i < max_entries && i < sect->num_entries; i++)
		entries[i] = sect->entries[i];
	return i;
}

const char *
rte_cfgfile_get_entry(struct rte_cfgfile *cfg, const char *sectionname,
		const char *entryname)
{
	int i;
	const struct rte_cfgfile_section *sect = _get_section(cfg, sectionname);
	if (sect == NULL)
		return NULL;
	for (i = 0; i < sect->num_entries; i++)
		if (strncmp(sect->entries[i].name, entryname, CFG_NAME_LEN)
									== 0)
			return sect->entries[i].value;
	return NULL;
}

int
rte_cfgfile_has_entry(struct rte_cfgfile *cfg, const char *sectionname,
		const char *entryname)
{
	return rte_cfgfile_get_entry(cfg, sectionname, entryname) != NULL;
}

RTE_INIT(cfgfile_init)
{
	cfgfile_logtype = rte_log_register("lib.cfgfile");
	if (cfgfile_logtype >= 0)
		rte_log_set_level(cfgfile_logtype, RTE_LOG_INFO);
}
Commit	Line	Data
11fdf7f2 TL	1	/* SPDX-License-Identifier: BSD-3-Clause
	2	* Copyright(c) 2010-2014 Intel Corporation
	3	*/
	4
	5	#include <stdio.h>
	6	#include <stdlib.h>
	7	#include <string.h>
	8	#include <ctype.h>
	9	#include <errno.h>
9f95a23c	10	#include <rte_string_fns.h>
11fdf7f2	11	#include <rte_common.h>
f67539c2	12	#include <rte_log.h>
11fdf7f2 TL	13
	14	#include "rte_cfgfile.h"
	15
	16	struct rte_cfgfile_section {
	17	char name[CFG_NAME_LEN];
	18	int num_entries;
	19	int allocated_entries;
	20	struct rte_cfgfile_entry *entries;
	21	};
	22
	23	struct rte_cfgfile {
	24	int flags;
	25	int num_sections;
	26	int allocated_sections;
	27	struct rte_cfgfile_section *sections;
	28	};
	29
f67539c2 TL	30	static int cfgfile_logtype;
	31
	32	#define CFG_LOG(level, fmt, args...) \
	33	rte_log(RTE_LOG_ ## level, cfgfile_logtype, "%s(): " fmt "\n", \
	34	__func__, ## args)
	35
11fdf7f2 TL	36	/** when we resize a file structure, how many extra entries
	37	* for new sections do we add in */
	38	#define CFG_ALLOC_SECTION_BATCH 8
	39	/** when we resize a section structure, how many extra entries
	40	* for new entries do we add in */
	41	#define CFG_ALLOC_ENTRY_BATCH 16
	42
	43	/**
	44	* Default cfgfile load parameters.
	45	*/
	46	static const struct rte_cfgfile_parameters default_cfgfile_params = {
	47	.comment_character = CFG_DEFAULT_COMMENT_CHARACTER,
	48	};
	49
	50	/**
	51	* Defines the list of acceptable comment characters supported by this
	52	* library.
	53	*/
	54	static const char valid_comment_chars[] = {
	55	'!',
	56	'#',
	57	'%',
	58	';',
	59	'@'
	60	};
	61
	62	static unsigned
	63	_strip(char *str, unsigned len)
	64	{
	65	int newlen = len;
	66	if (len == 0)
	67	return 0;
	68
	69	if (isspace(str[len-1])) {
	70	/* strip trailing whitespace */
	71	while (newlen > 0 && isspace(str[newlen - 1]))
	72	str[--newlen] = '\0';
	73	}
	74
	75	if (isspace(str[0])) {
	76	/* strip leading whitespace */
	77	int i, start = 1;
	78	while (isspace(str[start]) && start < newlen)
	79	start++
	80	; /* do nothing */
	81	newlen -= start;
	82	for (i = 0; i < newlen; i++)
	83	str[i] = str[i+start];
	84	str[i] = '\0';
	85	}
	86	return newlen;
	87	}
	88
	89	static struct rte_cfgfile_section *
	90	_get_section(struct rte_cfgfile cfg, const char sectionname)
	91	{
	92	int i;
	93
	94	for (i = 0; i < cfg->num_sections; i++) {
	95	if (strncmp(cfg->sections[i].name, sectionname,
	96	sizeof(cfg->sections[0].name)) == 0)
	97	return &cfg->sections[i];
	98	}
	99	return NULL;
100	}
101
102	static int
103	_add_entry(struct rte_cfgfile_section section, const char entryname,
104	const char *entryvalue)
105	{
106	/* resize entry structure if we don't have room for more entries */
107	if (section->num_entries == section->allocated_entries) {
108	struct rte_cfgfile_entry *n_entries = realloc(
109	section->entries,
110	sizeof(struct rte_cfgfile_entry) *
111	((section->allocated_entries) +
112	CFG_ALLOC_ENTRY_BATCH));
113
114	if (n_entries == NULL)
115	return -ENOMEM;
116
117	section->entries = n_entries;
118	section->allocated_entries += CFG_ALLOC_ENTRY_BATCH;
119	}
120	/* fill up entry fields with key name and value */
121	struct rte_cfgfile_entry *curr_entry =
122	&section->entries[section->num_entries];
123
9f95a23c TL	124	strlcpy(curr_entry->name, entryname, sizeof(curr_entry->name));
9f95a23c TL	125	strlcpy(curr_entry->value, entryvalue, sizeof(curr_entry->value));
11fdf7f2 TL	126	section->num_entries++;
	127
	128	return 0;
	129	}
	130
	131	static int
	132	rte_cfgfile_check_params(const struct rte_cfgfile_parameters *params)
	133	{
	134	unsigned int valid_comment;
	135	unsigned int i;
	136
	137	if (!params) {
f67539c2	138	CFG_LOG(ERR, "missing cfgfile parameters\n");
11fdf7f2 TL	139	return -EINVAL;
	140	}
	141
	142	valid_comment = 0;
	143	for (i = 0; i < RTE_DIM(valid_comment_chars); i++) {
	144	if (params->comment_character == valid_comment_chars[i]) {
	145	valid_comment = 1;
	146	break;
	147	}
	148	}
	149
	150	if (valid_comment == 0) {
f67539c2	151	CFG_LOG(ERR, "invalid comment characters %c\n",
11fdf7f2 TL	152	params->comment_character);
	153	return -ENOTSUP;
	154	}
	155
	156	return 0;
	157	}
	158
	159	struct rte_cfgfile *
	160	rte_cfgfile_load(const char *filename, int flags)
	161	{
	162	return rte_cfgfile_load_with_params(filename, flags,
	163	&default_cfgfile_params);
	164	}
	165
	166	struct rte_cfgfile *
	167	rte_cfgfile_load_with_params(const char *filename, int flags,
	168	const struct rte_cfgfile_parameters *params)
	169	{
f67539c2	170	char buffer[CFG_NAME_LEN + CFG_VALUE_LEN + 4];
11fdf7f2	171	int lineno = 0;
f67539c2	172	struct rte_cfgfile *cfg;
11fdf7f2 TL	173
	174	if (rte_cfgfile_check_params(params))
	175	return NULL;
	176
	177	FILE *f = fopen(filename, "r");
	178	if (f == NULL)
	179	return NULL;
	180
	181	cfg = rte_cfgfile_create(flags);
	182
	183	while (fgets(buffer, sizeof(buffer), f) != NULL) {
f67539c2	184	char *pos;
11fdf7f2 TL	185	size_t len = strnlen(buffer, sizeof(buffer));
	186	lineno++;
	187	if ((len >= sizeof(buffer) - 1) && (buffer[len-1] != '\n')) {
f67539c2	188	CFG_LOG(ERR, " line %d - no \\n found on string. "
11fdf7f2 TL	189	"Check if line too long\n", lineno);
	190	goto error1;
	191	}
	192	/* skip parsing if comment character found */
	193	pos = memchr(buffer, params->comment_character, len);
	194	if (pos != NULL && (*(pos-1) != '\\')) {
	195	*pos = '\0';
	196	len = pos - buffer;
	197	}
	198
	199	len = _strip(buffer, len);
	200	/* skip lines without useful content */
	201	if (buffer[0] != '[' && memchr(buffer, '=', len) == NULL)
	202	continue;
	203
	204	if (buffer[0] == '[') {
	205	/* section heading line */
	206	char *end = memchr(buffer, ']', len);
	207	if (end == NULL) {
f67539c2 TL	208	CFG_LOG(ERR,
	209	"line %d - no terminating ']' character found\n",
	210	lineno);
11fdf7f2 TL	211	goto error1;
	212	}
	213	*end = '\0';
	214	_strip(&buffer[1], end - &buffer[1]);
	215
	216	rte_cfgfile_add_section(cfg, &buffer[1]);
	217	} else {
	218	/* key and value line */
	219	char *split[2] = {NULL};
	220
	221	split[0] = buffer;
	222	split[1] = memchr(buffer, '=', len);
	223	if (split[1] == NULL) {
f67539c2 TL	224	CFG_LOG(ERR,
	225	"line %d - no '=' character found\n",
	226	lineno);
11fdf7f2 TL	227	goto error1;
	228	}
	229	*split[1] = '\0';
	230	split[1]++;
	231
	232	_strip(split[0], strlen(split[0]));
	233	_strip(split[1], strlen(split[1]));
	234	char *end = memchr(split[1], '\\', strlen(split[1]));
	235
9f95a23c	236	size_t split_len = strlen(split[1]) + 1;
11fdf7f2 TL	237	while (end != NULL) {
	238	if (*(end+1) == params->comment_character) {
	239	*end = '\0';
9f95a23c	240	strlcat(split[1], end+1, split_len);
11fdf7f2 TL	241	} else
	242	end++;
	243	end = memchr(end, '\\', strlen(end));
	244	}
	245
	246	if (!(flags & CFG_FLAG_EMPTY_VALUES) &&
	247	(*split[1] == '\0')) {
f67539c2 TL	248	CFG_LOG(ERR,
	249	"line %d - cannot use empty values\n",
	250	lineno);
11fdf7f2 TL	251	goto error1;
	252	}
	253
	254	if (cfg->num_sections == 0)
	255	goto error1;
	256
	257	_add_entry(&cfg->sections[cfg->num_sections - 1],
	258	split[0], split[1]);
	259	}
	260	}
	261	fclose(f);
	262	return cfg;
	263	error1:
	264	rte_cfgfile_close(cfg);
	265	fclose(f);
	266	return NULL;
	267	}
	268
	269	struct rte_cfgfile *
	270	rte_cfgfile_create(int flags)
	271	{
	272	int i;
f67539c2	273	struct rte_cfgfile *cfg;
11fdf7f2 TL	274
	275	cfg = malloc(sizeof(*cfg));
	276
	277	if (cfg == NULL)
	278	return NULL;
	279
	280	cfg->flags = flags;
	281	cfg->num_sections = 0;
	282
	283	/* allocate first batch of sections and entries */
f67539c2 TL	284	cfg->sections = calloc(CFG_ALLOC_SECTION_BATCH,
f67539c2 TL	285	sizeof(struct rte_cfgfile_section));
11fdf7f2 TL	286	if (cfg->sections == NULL)
	287	goto error1;
	288
	289	cfg->allocated_sections = CFG_ALLOC_SECTION_BATCH;
	290
	291	for (i = 0; i < CFG_ALLOC_SECTION_BATCH; i++) {
f67539c2 TL	292	cfg->sections[i].entries = calloc(CFG_ALLOC_ENTRY_BATCH,
f67539c2 TL	293	sizeof(struct rte_cfgfile_entry));
11fdf7f2 TL	294
	295	if (cfg->sections[i].entries == NULL)
	296	goto error1;
	297
	298	cfg->sections[i].num_entries = 0;
	299	cfg->sections[i].allocated_entries = CFG_ALLOC_ENTRY_BATCH;
	300	}
	301
	302	if (flags & CFG_FLAG_GLOBAL_SECTION)
	303	rte_cfgfile_add_section(cfg, "GLOBAL");
	304
	305	return cfg;
	306	error1:
	307	if (cfg->sections != NULL) {
	308	for (i = 0; i < cfg->allocated_sections; i++) {
	309	if (cfg->sections[i].entries != NULL) {
	310	free(cfg->sections[i].entries);
	311	cfg->sections[i].entries = NULL;
	312	}
	313	}
	314	free(cfg->sections);
	315	cfg->sections = NULL;
	316	}
	317	free(cfg);
	318	return NULL;
	319	}
	320
	321	int
	322	rte_cfgfile_add_section(struct rte_cfgfile cfg, const char sectionname)
	323	{
	324	int i;
	325
	326	if (cfg == NULL)
	327	return -EINVAL;
	328
	329	if (sectionname == NULL)
	330	return -EINVAL;
	331
	332	/* resize overall struct if we don't have room for more sections */
	333	if (cfg->num_sections == cfg->allocated_sections) {
	334
	335	struct rte_cfgfile_section *n_sections =
	336	realloc(cfg->sections,
	337	sizeof(struct rte_cfgfile_section) *
	338	((cfg->allocated_sections) +
	339	CFG_ALLOC_SECTION_BATCH));
	340
	341	if (n_sections == NULL)
	342	return -ENOMEM;
	343
	344	for (i = 0; i < CFG_ALLOC_SECTION_BATCH; i++) {
	345	n_sections[i + cfg->allocated_sections].num_entries = 0;
	346	n_sections[i +
	347	cfg->allocated_sections].allocated_entries = 0;
	348	n_sections[i + cfg->allocated_sections].entries = NULL;
	349	}
	350	cfg->sections = n_sections;
	351	cfg->allocated_sections += CFG_ALLOC_SECTION_BATCH;
	352	}
	353
9f95a23c TL	354	strlcpy(cfg->sections[cfg->num_sections].name, sectionname,
9f95a23c TL	355	sizeof(cfg->sections[0].name));
11fdf7f2 TL	356	cfg->sections[cfg->num_sections].num_entries = 0;
	357	cfg->num_sections++;
	358
	359	return 0;
	360	}
	361
	362	int rte_cfgfile_add_entry(struct rte_cfgfile *cfg,
	363	const char sectionname, const char entryname,
	364	const char *entryvalue)
	365	{
	366	int ret;
	367
	368	if ((cfg == NULL) \|\| (sectionname == NULL) \|\| (entryname == NULL)
	369	\|\| (entryvalue == NULL))
	370	return -EINVAL;
	371
	372	if (rte_cfgfile_has_entry(cfg, sectionname, entryname) != 0)
	373	return -EEXIST;
	374
	375	/* search for section pointer by sectionname */
	376	struct rte_cfgfile_section *curr_section = _get_section(cfg,
	377	sectionname);
	378	if (curr_section == NULL)
	379	return -EINVAL;
	380
	381	ret = _add_entry(curr_section, entryname, entryvalue);
	382
	383	return ret;
	384	}
	385
	386	int rte_cfgfile_set_entry(struct rte_cfgfile cfg, const char sectionname,
	387	const char entryname, const char entryvalue)
	388	{
	389	int i;
	390
	391	if ((cfg == NULL) \|\| (sectionname == NULL) \|\| (entryname == NULL))
	392	return -EINVAL;
	393
	394	/* search for section pointer by sectionname */
	395	struct rte_cfgfile_section *curr_section = _get_section(cfg,
	396	sectionname);
	397	if (curr_section == NULL)
	398	return -EINVAL;
	399
	400	if (entryvalue == NULL)
	401	entryvalue = "";
	402
	403	for (i = 0; i < curr_section->num_entries; i++)
	404	if (!strcmp(curr_section->entries[i].name, entryname)) {
9f95a23c TL	405	strlcpy(curr_section->entries[i].value, entryvalue,
9f95a23c TL	406	sizeof(curr_section->entries[i].value));
11fdf7f2 TL	407	return 0;
11fdf7f2 TL	408	}
f67539c2 TL	409
f67539c2 TL	410	CFG_LOG(ERR, "entry name doesn't exist\n");
11fdf7f2 TL	411	return -EINVAL;
	412	}
	413
	414	int rte_cfgfile_save(struct rte_cfgfile cfg, const char filename)
	415	{
	416	int i, j;
	417
	418	if ((cfg == NULL) \|\| (filename == NULL))
	419	return -EINVAL;
	420
	421	FILE *f = fopen(filename, "w");
	422
	423	if (f == NULL)
	424	return -EINVAL;
	425
	426	for (i = 0; i < cfg->num_sections; i++) {
	427	fprintf(f, "[%s]\n", cfg->sections[i].name);
	428
	429	for (j = 0; j < cfg->sections[i].num_entries; j++) {
	430	fprintf(f, "%s=%s\n",
	431	cfg->sections[i].entries[j].name,
	432	cfg->sections[i].entries[j].value);
	433	}
	434	}
	435	return fclose(f);
	436	}
	437
	438	int rte_cfgfile_close(struct rte_cfgfile *cfg)
	439	{
	440	int i;
	441
	442	if (cfg == NULL)
	443	return -1;
	444
	445	if (cfg->sections != NULL) {
	446	for (i = 0; i < cfg->allocated_sections; i++) {
	447	if (cfg->sections[i].entries != NULL) {
	448	free(cfg->sections[i].entries);
	449	cfg->sections[i].entries = NULL;
	450	}
	451	}
	452	free(cfg->sections);
	453	cfg->sections = NULL;
	454	}
	455	free(cfg);
	456	cfg = NULL;
	457
	458	return 0;
	459	}
	460
	461	int
	462	rte_cfgfile_num_sections(struct rte_cfgfile cfg, const char sectionname,
	463	size_t length)
	464	{
	465	int i;
	466	int num_sections = 0;
	467	for (i = 0; i < cfg->num_sections; i++) {
	468	if (strncmp(cfg->sections[i].name, sectionname, length) == 0)
	469	num_sections++;
	470	}
	471	return num_sections;
	472	}
	473
	474	int
475	rte_cfgfile_sections(struct rte_cfgfile cfg, char sections[],
476	int max_sections)
477	{
478	int i;
479
480	for (i = 0; i < cfg->num_sections && i < max_sections; i++)
9f95a23c	481	strlcpy(sections[i], cfg->sections[i].name, CFG_NAME_LEN);
11fdf7f2 TL	482
	483	return i;
	484	}
	485
	486	int
	487	rte_cfgfile_has_section(struct rte_cfgfile cfg, const char sectionname)
	488	{
	489	return _get_section(cfg, sectionname) != NULL;
	490	}
	491
	492	int
	493	rte_cfgfile_section_num_entries(struct rte_cfgfile *cfg,
	494	const char *sectionname)
	495	{
	496	const struct rte_cfgfile_section *s = _get_section(cfg, sectionname);
	497	if (s == NULL)
	498	return -1;
	499	return s->num_entries;
	500	}
	501
	502	int
	503	rte_cfgfile_section_num_entries_by_index(struct rte_cfgfile *cfg,
	504	char *sectionname, int index)
	505	{
	506	if (index < 0 \|\| index >= cfg->num_sections)
	507	return -1;
	508
	509	const struct rte_cfgfile_section *sect = &(cfg->sections[index]);
	510
9f95a23c	511	strlcpy(sectionname, sect->name, CFG_NAME_LEN);
11fdf7f2 TL	512	return sect->num_entries;
	513	}
	514	int
	515	rte_cfgfile_section_entries(struct rte_cfgfile cfg, const char sectionname,
	516	struct rte_cfgfile_entry *entries, int max_entries)
	517	{
	518	int i;
	519	const struct rte_cfgfile_section *sect = _get_section(cfg, sectionname);
	520	if (sect == NULL)
	521	return -1;
	522	for (i = 0; i < max_entries && i < sect->num_entries; i++)
	523	entries[i] = sect->entries[i];
	524	return i;
	525	}
	526
	527	int
	528	rte_cfgfile_section_entries_by_index(struct rte_cfgfile *cfg, int index,
	529	char *sectionname,
	530	struct rte_cfgfile_entry *entries, int max_entries)
	531	{
	532	int i;
	533	const struct rte_cfgfile_section *sect;
	534
	535	if (index < 0 \|\| index >= cfg->num_sections)
	536	return -1;
	537	sect = &cfg->sections[index];
9f95a23c	538	strlcpy(sectionname, sect->name, CFG_NAME_LEN);
11fdf7f2 TL	539	for (i = 0; i < max_entries && i < sect->num_entries; i++)
	540	entries[i] = sect->entries[i];
	541	return i;
	542	}
	543
	544	const char *
	545	rte_cfgfile_get_entry(struct rte_cfgfile cfg, const char sectionname,
	546	const char *entryname)
	547	{
	548	int i;
	549	const struct rte_cfgfile_section *sect = _get_section(cfg, sectionname);
	550	if (sect == NULL)
	551	return NULL;
	552	for (i = 0; i < sect->num_entries; i++)
	553	if (strncmp(sect->entries[i].name, entryname, CFG_NAME_LEN)
	554	== 0)
	555	return sect->entries[i].value;
	556	return NULL;
	557	}
	558
	559	int
	560	rte_cfgfile_has_entry(struct rte_cfgfile cfg, const char sectionname,
	561	const char *entryname)
	562	{
	563	return rte_cfgfile_get_entry(cfg, sectionname, entryname) != NULL;
	564	}
f67539c2 TL	565
	566	RTE_INIT(cfgfile_init)
	567	{
	568	cfgfile_logtype = rte_log_register("lib.cfgfile");
	569	if (cfgfile_logtype >= 0)
	570	rte_log_set_level(cfgfile_logtype, RTE_LOG_INFO);
	571	}