diff options
Diffstat (limited to 'tools/perf/pmu-events/json.c')
-rw-r--r-- | tools/perf/pmu-events/json.c | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/tools/perf/pmu-events/json.c b/tools/perf/pmu-events/json.c deleted file mode 100644 index 0544398d6e2d..000000000000 --- a/tools/perf/pmu-events/json.c +++ /dev/null @@ -1,162 +0,0 @@ -/* Parse JSON files using the JSMN parser. */ - -/* - * Copyright (c) 2014, Intel Corporation - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * - * 2. 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. - * - * 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 HOLDER 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 <stdlib.h> -#include <string.h> -#include <sys/mman.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <stdio.h> -#include <errno.h> -#include <unistd.h> -#include "jsmn.h" -#include "json.h" -#include <linux/kernel.h> - - -static char *mapfile(const char *fn, size_t *size) -{ - unsigned ps = sysconf(_SC_PAGESIZE); - struct stat st; - char *map = NULL; - int err; - int fd = open(fn, O_RDONLY); - - if (fd < 0 && verbose > 0 && fn) { - pr_err("Error opening events file '%s': %s\n", fn, - strerror(errno)); - } - - if (fd < 0) - return NULL; - err = fstat(fd, &st); - if (err < 0) - goto out; - *size = st.st_size; - map = mmap(NULL, - (st.st_size + ps - 1) & ~(ps - 1), - PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0); - if (map == MAP_FAILED) - map = NULL; -out: - close(fd); - return map; -} - -static void unmapfile(char *map, size_t size) -{ - unsigned ps = sysconf(_SC_PAGESIZE); - munmap(map, roundup(size, ps)); -} - -/* - * Parse json file using jsmn. Return array of tokens, - * and mapped file. Caller needs to free array. - */ -jsmntok_t *parse_json(const char *fn, char **map, size_t *size, int *len) -{ - jsmn_parser parser; - jsmntok_t *tokens; - jsmnerr_t res; - unsigned sz; - - *map = mapfile(fn, size); - if (!*map) - return NULL; - /* Heuristic */ - sz = *size * 16; - tokens = malloc(sz); - if (!tokens) - goto error; - jsmn_init(&parser); - res = jsmn_parse(&parser, *map, *size, tokens, - sz / sizeof(jsmntok_t)); - if (res != JSMN_SUCCESS) { - pr_err("%s: json error %s\n", fn, jsmn_strerror(res)); - goto error_free; - } - if (len) - *len = parser.toknext; - return tokens; -error_free: - free(tokens); -error: - unmapfile(*map, *size); - return NULL; -} - -void free_json(char *map, size_t size, jsmntok_t *tokens) -{ - free(tokens); - unmapfile(map, size); -} - -static int countchar(char *map, char c, int end) -{ - int i; - int count = 0; - for (i = 0; i < end; i++) - if (map[i] == c) - count++; - return count; -} - -/* Return line number of a jsmn token */ -int json_line(char *map, jsmntok_t *t) -{ - return countchar(map, '\n', t->start) + 1; -} - -static const char * const jsmn_types[] = { - [JSMN_PRIMITIVE] = "primitive", - [JSMN_ARRAY] = "array", - [JSMN_OBJECT] = "object", - [JSMN_STRING] = "string" -}; - -#define LOOKUP(a, i) ((i) < (sizeof(a)/sizeof(*(a))) ? ((a)[i]) : "?") - -/* Return type name of a jsmn token */ -const char *json_name(jsmntok_t *t) -{ - return LOOKUP(jsmn_types, t->type); -} - -int json_len(jsmntok_t *t) -{ - return t->end - t->start; -} - -/* Is string t equal to s? */ -int json_streq(char *map, jsmntok_t *t, const char *s) -{ - unsigned len = json_len(t); - return len == strlen(s) && !strncasecmp(map + t->start, s, len); -} |