From 97f17497d162afdb82c8704bf097f0fee3724b2e Mon Sep 17 00:00:00 2001 From: "C.J. Collier" Date: Tue, 14 Jun 2016 07:50:17 -0700 Subject: Imported Upstream version 16.04 Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757 Signed-off-by: C.J. Collier --- lib/librte_cfgfile/rte_cfgfile.c | 374 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 374 insertions(+) create mode 100644 lib/librte_cfgfile/rte_cfgfile.c (limited to 'lib/librte_cfgfile/rte_cfgfile.c') diff --git a/lib/librte_cfgfile/rte_cfgfile.c b/lib/librte_cfgfile/rte_cfgfile.c new file mode 100644 index 00000000..75625a28 --- /dev/null +++ b/lib/librte_cfgfile/rte_cfgfile.c @@ -0,0 +1,374 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include +#include +#include +#include + +#include "rte_cfgfile.h" + +struct rte_cfgfile_section { + char name[CFG_NAME_LEN]; + int num_entries; + struct rte_cfgfile_entry *entries[0]; +}; + +struct rte_cfgfile { + int flags; + int num_sections; + struct rte_cfgfile_section *sections[0]; +}; + +/** 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 + +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; +} + +struct rte_cfgfile * +rte_cfgfile_load(const char *filename, int flags) +{ + int allocated_sections = CFG_ALLOC_SECTION_BATCH; + int allocated_entries = 0; + int curr_section = -1; + int curr_entry = -1; + char buffer[256] = {0}; + int lineno = 0; + struct rte_cfgfile *cfg = NULL; + + FILE *f = fopen(filename, "r"); + if (f == NULL) + return NULL; + + cfg = malloc(sizeof(*cfg) + sizeof(cfg->sections[0]) * + allocated_sections); + if (cfg == NULL) + goto error2; + + memset(cfg->sections, 0, sizeof(cfg->sections[0]) * allocated_sections); + + while (fgets(buffer, sizeof(buffer), f) != NULL) { + char *pos = NULL; + size_t len = strnlen(buffer, sizeof(buffer)); + lineno++; + if ((len >= sizeof(buffer) - 1) && (buffer[len-1] != '\n')) { + printf("Error line %d - no \\n found on string. " + "Check if line too long\n", lineno); + goto error1; + } + pos = memchr(buffer, ';', sizeof(buffer)); + if (pos != NULL) { + *pos = '\0'; + len = pos - buffer; + } + + len = _strip(buffer, len); + if (buffer[0] != '[' && memchr(buffer, '=', len) == NULL) + continue; + + if (buffer[0] == '[') { + /* section heading line */ + char *end = memchr(buffer, ']', len); + if (end == NULL) { + printf("Error line %d - no terminating '['" + "character found\n", lineno); + goto error1; + } + *end = '\0'; + _strip(&buffer[1], end - &buffer[1]); + + /* close off old section and add start new one */ + if (curr_section >= 0) + cfg->sections[curr_section]->num_entries = + curr_entry + 1; + curr_section++; + + /* resize overall struct if we don't have room for more + sections */ + if (curr_section == allocated_sections) { + allocated_sections += CFG_ALLOC_SECTION_BATCH; + struct rte_cfgfile *n_cfg = realloc(cfg, + sizeof(*cfg) + sizeof(cfg->sections[0]) + * allocated_sections); + if (n_cfg == NULL) { + printf("Error - no more memory\n"); + goto error1; + } + cfg = n_cfg; + } + + /* allocate space for new section */ + allocated_entries = CFG_ALLOC_ENTRY_BATCH; + curr_entry = -1; + cfg->sections[curr_section] = malloc( + sizeof(*cfg->sections[0]) + + sizeof(cfg->sections[0]->entries[0]) * + allocated_entries); + if (cfg->sections[curr_section] == NULL) { + printf("Error - no more memory\n"); + goto error1; + } + + snprintf(cfg->sections[curr_section]->name, + sizeof(cfg->sections[0]->name), + "%s", &buffer[1]); + } else { + /* value line */ + if (curr_section < 0) { + printf("Error line %d - value outside of" + "section\n", lineno); + goto error1; + } + + struct rte_cfgfile_section *sect = + cfg->sections[curr_section]; + char *split[2]; + if (rte_strsplit(buffer, sizeof(buffer), split, 2, '=') + != 2) { + printf("Error at line %d - cannot split " + "string\n", lineno); + goto error1; + } + + curr_entry++; + if (curr_entry == allocated_entries) { + allocated_entries += CFG_ALLOC_ENTRY_BATCH; + struct rte_cfgfile_section *n_sect = realloc( + sect, sizeof(*sect) + + sizeof(sect->entries[0]) * + allocated_entries); + if (n_sect == NULL) { + printf("Error - no more memory\n"); + goto error1; + } + sect = cfg->sections[curr_section] = n_sect; + } + + sect->entries[curr_entry] = malloc( + sizeof(*sect->entries[0])); + if (sect->entries[curr_entry] == NULL) { + printf("Error - no more memory\n"); + goto error1; + } + + struct rte_cfgfile_entry *entry = sect->entries[ + curr_entry]; + snprintf(entry->name, sizeof(entry->name), "%s", + split[0]); + snprintf(entry->value, sizeof(entry->value), "%s", + split[1]); + _strip(entry->name, strnlen(entry->name, + sizeof(entry->name))); + _strip(entry->value, strnlen(entry->value, + sizeof(entry->value))); + } + } + fclose(f); + cfg->flags = flags; + cfg->num_sections = curr_section + 1; + /* curr_section will still be -1 if we have an empty file */ + if (curr_section >= 0) + cfg->sections[curr_section]->num_entries = curr_entry + 1; + return cfg; + +error1: + rte_cfgfile_close(cfg); +error2: + fclose(f); + return NULL; +} + + +int rte_cfgfile_close(struct rte_cfgfile *cfg) +{ + int i, j; + + if (cfg == NULL) + return -1; + + for (i = 0; i < cfg->num_sections; i++) { + if (cfg->sections[i] != NULL) { + if (cfg->sections[i]->num_entries) { + for (j = 0; j < cfg->sections[i]->num_entries; + j++) { + if (cfg->sections[i]->entries[j] != + NULL) + free(cfg->sections[i]-> + entries[j]); + } + } + free(cfg->sections[i]); + } + } + free(cfg); + + 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++) + snprintf(sections[i], CFG_NAME_LEN, "%s", + cfg->sections[i]->name); + + return i; +} + +static const 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; +} + +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_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]; + snprintf(sectionname, CFG_NAME_LEN, "%s", sect->name); + 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; +} -- cgit 1.2.3-korg