diff options
Diffstat (limited to 'src/fluent-bit/lib/jsmn')
| -rw-r--r-- | src/fluent-bit/lib/jsmn/CMakeLists.txt | 6 | ||||
| -rw-r--r-- | src/fluent-bit/lib/jsmn/LICENSE | 20 | ||||
| -rw-r--r-- | src/fluent-bit/lib/jsmn/README.md | 182 | ||||
| -rw-r--r-- | src/fluent-bit/lib/jsmn/VERSION | 4 | ||||
| -rw-r--r-- | src/fluent-bit/lib/jsmn/jsmn.c | 1 | ||||
| -rw-r--r-- | src/fluent-bit/lib/jsmn/jsmn.h | 471 |
6 files changed, 684 insertions, 0 deletions
diff --git a/src/fluent-bit/lib/jsmn/CMakeLists.txt b/src/fluent-bit/lib/jsmn/CMakeLists.txt new file mode 100644 index 000000000..3ee5421f3 --- /dev/null +++ b/src/fluent-bit/lib/jsmn/CMakeLists.txt @@ -0,0 +1,6 @@ +set(src + jsmn.c +) + +SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -fPIC -DJSMN_PARENT_LINKS -DJSMN_STRICT") +add_library(jsmn STATIC ${src}) diff --git a/src/fluent-bit/lib/jsmn/LICENSE b/src/fluent-bit/lib/jsmn/LICENSE new file mode 100644 index 000000000..c84fb2e97 --- /dev/null +++ b/src/fluent-bit/lib/jsmn/LICENSE @@ -0,0 +1,20 @@ +Copyright (c) 2010 Serge A. Zaitsev + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. + diff --git a/src/fluent-bit/lib/jsmn/README.md b/src/fluent-bit/lib/jsmn/README.md new file mode 100644 index 000000000..f8249f3dd --- /dev/null +++ b/src/fluent-bit/lib/jsmn/README.md @@ -0,0 +1,182 @@ +JSMN +==== + +[](https://travis-ci.org/zserge/jsmn) + +jsmn (pronounced like 'jasmine') is a minimalistic JSON parser in C. It can be +easily integrated into resource-limited or embedded projects. + +You can find more information about JSON format at [json.org][1] + +Library sources are available at https://github.com/zserge/jsmn + +The web page with some information about jsmn can be found at +[http://zserge.com/jsmn.html][2] + +Philosophy +---------- + +Most JSON parsers offer you a bunch of functions to load JSON data, parse it +and extract any value by its name. jsmn proves that checking the correctness of +every JSON packet or allocating temporary objects to store parsed JSON fields +often is an overkill. + +JSON format itself is extremely simple, so why should we complicate it? + +jsmn is designed to be **robust** (it should work fine even with erroneous +data), **fast** (it should parse data on the fly), **portable** (no superfluous +dependencies or non-standard C extensions). And of course, **simplicity** is a +key feature - simple code style, simple algorithm, simple integration into +other projects. + +Features +-------- + +* compatible with C89 +* no dependencies (even libc!) +* highly portable (tested on x86/amd64, ARM, AVR) +* about 200 lines of code +* extremely small code footprint +* API contains only 2 functions +* no dynamic memory allocation +* incremental single-pass parsing +* library code is covered with unit-tests + +Design +------ + +The rudimentary jsmn object is a **token**. Let's consider a JSON string: + + '{ "name" : "Jack", "age" : 27 }' + +It holds the following tokens: + +* Object: `{ "name" : "Jack", "age" : 27}` (the whole object) +* Strings: `"name"`, `"Jack"`, `"age"` (keys and some values) +* Number: `27` + +In jsmn, tokens do not hold any data, but point to token boundaries in JSON +string instead. In the example above jsmn will create tokens like: Object +[0..31], String [3..7], String [12..16], String [20..23], Number [27..29]. + +Every jsmn token has a type, which indicates the type of corresponding JSON +token. jsmn supports the following token types: + +* Object - a container of key-value pairs, e.g.: + `{ "foo":"bar", "x":0.3 }` +* Array - a sequence of values, e.g.: + `[ 1, 2, 3 ]` +* String - a quoted sequence of chars, e.g.: `"foo"` +* Primitive - a number, a boolean (`true`, `false`) or `null` + +Besides start/end positions, jsmn tokens for complex types (like arrays +or objects) also contain a number of child items, so you can easily follow +object hierarchy. + +This approach provides enough information for parsing any JSON data and makes +it possible to use zero-copy techniques. + +Usage +----- + +Download `jsmn.h`, include it, done. + +``` +#include "jsmn.h" + +... +jsmn_parser p; +jsmntok_t t[128]; /* We expect no more than 128 JSON tokens */ + +jsmn_init(&p); +r = jsmn_parse(&p, s, strlen(s), t, 128); +``` + +Since jsmn is a single-header, header-only library, for more complex use cases +you might need to define additional macros. `#define JSMN_STATIC` hides all +jsmn API symbols by making them static. Also, if you want to include `jsmn.h` +from multiple C files, to avoid duplication of symbols you may define `JSMN_HEADER` macro. + +``` +/* In every .c file that uses jsmn include only declarations: */ +#define JSMN_HEADER +#include "jsmn.h" + +/* Additionally, create one jsmn.c file for jsmn implementation: */ +#include "jsmn.h" +``` + +API +--- + +Token types are described by `jsmntype_t`: + + typedef enum { + JSMN_UNDEFINED = 0, + JSMN_OBJECT = 1, + JSMN_ARRAY = 2, + JSMN_STRING = 3, + JSMN_PRIMITIVE = 4 + } jsmntype_t; + +**Note:** Unlike JSON data types, primitive tokens are not divided into +numbers, booleans and null, because one can easily tell the type using the +first character: + +* <code>'t', 'f'</code> - boolean +* <code>'n'</code> - null +* <code>'-', '0'..'9'</code> - number + +Token is an object of `jsmntok_t` type: + + typedef struct { + jsmntype_t type; // Token type + int start; // Token start position + int end; // Token end position + int size; // Number of child (nested) tokens + } jsmntok_t; + +**Note:** string tokens point to the first character after +the opening quote and the previous symbol before final quote. This was made +to simplify string extraction from JSON data. + +All job is done by `jsmn_parser` object. You can initialize a new parser using: + + jsmn_parser parser; + jsmntok_t tokens[10]; + + jsmn_init(&parser); + + // js - pointer to JSON string + // tokens - an array of tokens available + // 10 - number of tokens available + jsmn_parse(&parser, js, strlen(js), tokens, 10); + +This will create a parser, and then it tries to parse up to 10 JSON tokens from +the `js` string. + +A non-negative return value of `jsmn_parse` is the number of tokens actually +used by the parser. +Passing NULL instead of the tokens array would not store parsing results, but +instead the function will return the number of tokens needed to parse the given +string. This can be useful if you don't know yet how many tokens to allocate. + +If something goes wrong, you will get an error. Error will be one of these: + +* `JSMN_ERROR_INVAL` - bad token, JSON string is corrupted +* `JSMN_ERROR_NOMEM` - not enough tokens, JSON string is too large +* `JSMN_ERROR_PART` - JSON string is too short, expecting more JSON data + +If you get `JSMN_ERROR_NOMEM`, you can re-allocate more tokens and call +`jsmn_parse` once more. If you read json data from the stream, you can +periodically call `jsmn_parse` and check if return value is `JSMN_ERROR_PART`. +You will get this error until you reach the end of JSON data. + +Other info +---------- + +This software is distributed under [MIT license](http://www.opensource.org/licenses/mit-license.php), + so feel free to integrate it in your commercial products. + +[1]: http://www.json.org/ +[2]: http://zserge.com/jsmn.html diff --git a/src/fluent-bit/lib/jsmn/VERSION b/src/fluent-bit/lib/jsmn/VERSION new file mode 100644 index 000000000..fa3b76bfd --- /dev/null +++ b/src/fluent-bit/lib/jsmn/VERSION @@ -0,0 +1,4 @@ +commit 053d3cd29200edb1bfd181d917d140c16c1f8834 +Merge: a91022a 0837288 +Author: P4t <pt300@tlen.pl> +Date: Thu Apr 2 15:08:12 2020 +0200 diff --git a/src/fluent-bit/lib/jsmn/jsmn.c b/src/fluent-bit/lib/jsmn/jsmn.c new file mode 100644 index 000000000..2f99c22e3 --- /dev/null +++ b/src/fluent-bit/lib/jsmn/jsmn.c @@ -0,0 +1 @@ +#include "jsmn.h" diff --git a/src/fluent-bit/lib/jsmn/jsmn.h b/src/fluent-bit/lib/jsmn/jsmn.h new file mode 100644 index 000000000..3178dcc97 --- /dev/null +++ b/src/fluent-bit/lib/jsmn/jsmn.h @@ -0,0 +1,471 @@ +/* + * MIT License + * + * Copyright (c) 2010 Serge Zaitsev + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#ifndef JSMN_H +#define JSMN_H + +#include <stddef.h> + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef JSMN_STATIC +#define JSMN_API static +#else +#define JSMN_API extern +#endif + +/** + * JSON type identifier. Basic types are: + * o Object + * o Array + * o String + * o Other primitive: number, boolean (true/false) or null + */ +typedef enum { + JSMN_UNDEFINED = 0, + JSMN_OBJECT = 1, + JSMN_ARRAY = 2, + JSMN_STRING = 3, + JSMN_PRIMITIVE = 4 +} jsmntype_t; + +enum jsmnerr { + /* Not enough tokens were provided */ + JSMN_ERROR_NOMEM = -1, + /* Invalid character inside JSON string */ + JSMN_ERROR_INVAL = -2, + /* The string is not a full JSON packet, more bytes expected */ + JSMN_ERROR_PART = -3 +}; + +/** + * JSON token description. + * type type (object, array, string etc.) + * start start position in JSON data string + * end end position in JSON data string + */ +typedef struct jsmntok { + jsmntype_t type; + int start; + int end; + int size; +#ifdef JSMN_PARENT_LINKS + int parent; +#endif +} jsmntok_t; + +/** + * JSON parser. Contains an array of token blocks available. Also stores + * the string being parsed now and current position in that string. + */ +typedef struct jsmn_parser { + unsigned int pos; /* offset in the JSON string */ + unsigned int toknext; /* next token to allocate */ + int toksuper; /* superior token node, e.g. parent object or array */ +} jsmn_parser; + +/** + * Create JSON parser over an array of tokens + */ +JSMN_API void jsmn_init(jsmn_parser *parser); + +/** + * Run JSON parser. It parses a JSON data string into and array of tokens, each + * describing + * a single JSON object. + */ +JSMN_API int jsmn_parse(jsmn_parser *parser, const char *js, const size_t len, + jsmntok_t *tokens, const unsigned int num_tokens); + +#ifndef JSMN_HEADER +/** + * Allocates a fresh unused token from the token pool. + */ +static jsmntok_t *jsmn_alloc_token(jsmn_parser *parser, jsmntok_t *tokens, + const size_t num_tokens) { + jsmntok_t *tok; + if (parser->toknext >= num_tokens) { + return NULL; + } + tok = &tokens[parser->toknext++]; + tok->start = tok->end = -1; + tok->size = 0; +#ifdef JSMN_PARENT_LINKS + tok->parent = -1; +#endif + return tok; +} + +/** + * Fills token type and boundaries. + */ +static void jsmn_fill_token(jsmntok_t *token, const jsmntype_t type, + const int start, const int end) { + token->type = type; + token->start = start; + token->end = end; + token->size = 0; +} + +/** + * Fills next available token with JSON primitive. + */ +static int jsmn_parse_primitive(jsmn_parser *parser, const char *js, + const size_t len, jsmntok_t *tokens, + const size_t num_tokens) { + jsmntok_t *token; + int start; + + start = parser->pos; + + for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) { + switch (js[parser->pos]) { +#ifndef JSMN_STRICT + /* In strict mode primitive must be followed by "," or "}" or "]" */ + case ':': +#endif + case '\t': + case '\r': + case '\n': + case ' ': + case ',': + case ']': + case '}': + goto found; + default: + /* to quiet a warning from gcc*/ + break; + } + if (js[parser->pos] < 32 || js[parser->pos] >= 127) { + parser->pos = start; + return JSMN_ERROR_INVAL; + } + } +#ifdef JSMN_STRICT + /* In strict mode primitive must be followed by a comma/object/array */ + parser->pos = start; + return JSMN_ERROR_PART; +#endif + +found: + if (tokens == NULL) { + parser->pos--; + return 0; + } + token = jsmn_alloc_token(parser, tokens, num_tokens); + if (token == NULL) { + parser->pos = start; + return JSMN_ERROR_NOMEM; + } + jsmn_fill_token(token, JSMN_PRIMITIVE, start, parser->pos); +#ifdef JSMN_PARENT_LINKS + token->parent = parser->toksuper; +#endif + parser->pos--; + return 0; +} + +/** + * Fills next token with JSON string. + */ +static int jsmn_parse_string(jsmn_parser *parser, const char *js, + const size_t len, jsmntok_t *tokens, + const size_t num_tokens) { + jsmntok_t *token; + + int start = parser->pos; + + parser->pos++; + + /* Skip starting quote */ + for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) { + char c = js[parser->pos]; + + /* Quote: end of string */ + if (c == '\"') { + if (tokens == NULL) { + return 0; + } + token = jsmn_alloc_token(parser, tokens, num_tokens); + if (token == NULL) { + parser->pos = start; + return JSMN_ERROR_NOMEM; + } + jsmn_fill_token(token, JSMN_STRING, start + 1, parser->pos); +#ifdef JSMN_PARENT_LINKS + token->parent = parser->toksuper; +#endif + return 0; + } + + /* Backslash: Quoted symbol expected */ + if (c == '\\' && parser->pos + 1 < len) { + int i; + parser->pos++; + switch (js[parser->pos]) { + /* Allowed escaped symbols */ + case '\"': + case '/': + case '\\': + case 'b': + case 'f': + case 'r': + case 'n': + case 't': + break; + /* Allows escaped symbol \uXXXX */ + case 'u': + parser->pos++; + for (i = 0; i < 4 && parser->pos < len && js[parser->pos] != '\0'; + i++) { + /* If it isn't a hex character we have an error */ + if (!((js[parser->pos] >= 48 && js[parser->pos] <= 57) || /* 0-9 */ + (js[parser->pos] >= 65 && js[parser->pos] <= 70) || /* A-F */ + (js[parser->pos] >= 97 && js[parser->pos] <= 102))) { /* a-f */ + parser->pos = start; + return JSMN_ERROR_INVAL; + } + parser->pos++; + } + parser->pos--; + break; + /* Unexpected symbol */ + default: + parser->pos = start; + return JSMN_ERROR_INVAL; + } + } + } + parser->pos = start; + return JSMN_ERROR_PART; +} + +/** + * Parse JSON string and fill tokens. + */ +JSMN_API int jsmn_parse(jsmn_parser *parser, const char *js, const size_t len, + jsmntok_t *tokens, const unsigned int num_tokens) { + int r; + int i; + jsmntok_t *token; + int count = parser->toknext; + + for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) { + char c; + jsmntype_t type; + + c = js[parser->pos]; + switch (c) { + case '{': + case '[': + count++; + if (tokens == NULL) { + break; + } + token = jsmn_alloc_token(parser, tokens, num_tokens); + if (token == NULL) { + return JSMN_ERROR_NOMEM; + } + if (parser->toksuper != -1) { + jsmntok_t *t = &tokens[parser->toksuper]; +#ifdef JSMN_STRICT + /* In strict mode an object or array can't become a key */ + if (t->type == JSMN_OBJECT) { + return JSMN_ERROR_INVAL; + } +#endif + t->size++; +#ifdef JSMN_PARENT_LINKS + token->parent = parser->toksuper; +#endif + } + token->type = (c == '{' ? JSMN_OBJECT : JSMN_ARRAY); + token->start = parser->pos; + parser->toksuper = parser->toknext - 1; + break; + case '}': + case ']': + if (tokens == NULL) { + break; + } + type = (c == '}' ? JSMN_OBJECT : JSMN_ARRAY); +#ifdef JSMN_PARENT_LINKS + if (parser->toknext < 1) { + return JSMN_ERROR_INVAL; + } + token = &tokens[parser->toknext - 1]; + for (;;) { + if (token->start != -1 && token->end == -1) { + if (token->type != type) { + return JSMN_ERROR_INVAL; + } + token->end = parser->pos + 1; + parser->toksuper = token->parent; + break; + } + if (token->parent == -1) { + if (token->type != type || parser->toksuper == -1) { + return JSMN_ERROR_INVAL; + } + break; + } + token = &tokens[token->parent]; + } +#else + for (i = parser->toknext - 1; i >= 0; i--) { + token = &tokens[i]; + if (token->start != -1 && token->end == -1) { + if (token->type != type) { + return JSMN_ERROR_INVAL; + } + parser->toksuper = -1; + token->end = parser->pos + 1; + break; + } + } + /* Error if unmatched closing bracket */ + if (i == -1) { + return JSMN_ERROR_INVAL; + } + for (; i >= 0; i--) { + token = &tokens[i]; + if (token->start != -1 && token->end == -1) { + parser->toksuper = i; + break; + } + } +#endif + break; + case '\"': + r = jsmn_parse_string(parser, js, len, tokens, num_tokens); + if (r < 0) { + return r; + } + count++; + if (parser->toksuper != -1 && tokens != NULL) { + tokens[parser->toksuper].size++; + } + break; + case '\t': + case '\r': + case '\n': + case ' ': + break; + case ':': + parser->toksuper = parser->toknext - 1; + break; + case ',': + if (tokens != NULL && parser->toksuper != -1 && + tokens[parser->toksuper].type != JSMN_ARRAY && + tokens[parser->toksuper].type != JSMN_OBJECT) { +#ifdef JSMN_PARENT_LINKS + parser->toksuper = tokens[parser->toksuper].parent; +#else + for (i = parser->toknext - 1; i >= 0; i--) { + if (tokens[i].type == JSMN_ARRAY || tokens[i].type == JSMN_OBJECT) { + if (tokens[i].start != -1 && tokens[i].end == -1) { + parser->toksuper = i; + break; + } + } + } +#endif + } + break; +#ifdef JSMN_STRICT + /* In strict mode primitives are: numbers and booleans */ + case '-': + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + case 't': + case 'f': + case 'n': + /* And they must not be keys of the object */ + if (tokens != NULL && parser->toksuper != -1) { + const jsmntok_t *t = &tokens[parser->toksuper]; + if (t->type == JSMN_OBJECT || + (t->type == JSMN_STRING && t->size != 0)) { + return JSMN_ERROR_INVAL; + } + } +#else + /* In non-strict mode every unquoted value is a primitive */ + default: +#endif + r = jsmn_parse_primitive(parser, js, len, tokens, num_tokens); + if (r < 0) { + return r; + } + count++; + if (parser->toksuper != -1 && tokens != NULL) { + tokens[parser->toksuper].size++; + } + break; + +#ifdef JSMN_STRICT + /* Unexpected char in strict mode */ + default: + return JSMN_ERROR_INVAL; +#endif + } + } + + if (tokens != NULL) { + for (i = parser->toknext - 1; i >= 0; i--) { + /* Unmatched opened object or array */ + if (tokens[i].start != -1 && tokens[i].end == -1) { + return JSMN_ERROR_PART; + } + } + } + + return count; +} + +/** + * Creates a new parser based over a given buffer with an array of tokens + * available. + */ +JSMN_API void jsmn_init(jsmn_parser *parser) { + parser->pos = 0; + parser->toknext = 0; + parser->toksuper = -1; +} + +#endif /* JSMN_HEADER */ + +#ifdef __cplusplus +} +#endif + +#endif /* JSMN_H */ |