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-rw-r--r--grub-core/lib/json/jsmn.h471
-rw-r--r--grub-core/lib/json/json.c264
-rw-r--r--grub-core/lib/json/json.h128
3 files changed, 863 insertions, 0 deletions
diff --git a/grub-core/lib/json/jsmn.h b/grub-core/lib/json/jsmn.h
new file mode 100644
index 0000000..3178dcc
--- /dev/null
+++ b/grub-core/lib/json/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 */
diff --git a/grub-core/lib/json/json.c b/grub-core/lib/json/json.c
new file mode 100644
index 0000000..1c20c75
--- /dev/null
+++ b/grub-core/lib/json/json.c
@@ -0,0 +1,264 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2019 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/dl.h>
+#include <grub/mm.h>
+
+#define JSMN_STATIC
+#include "jsmn.h"
+#include "json.h"
+
+GRUB_MOD_LICENSE ("GPLv3");
+
+grub_err_t
+grub_json_parse (grub_json_t **out, char *string, grub_size_t string_len)
+{
+ grub_json_t *json = NULL;
+ jsmn_parser parser;
+ grub_err_t ret = GRUB_ERR_NONE;
+ int jsmn_ret;
+
+ if (!string)
+ return GRUB_ERR_BAD_ARGUMENT;
+
+ json = grub_zalloc (sizeof (*json));
+ if (!json)
+ return GRUB_ERR_OUT_OF_MEMORY;
+ json->string = string;
+
+ /*
+ * Parse the string twice: first to determine how many tokens
+ * we need to allocate, second to fill allocated tokens.
+ */
+ jsmn_init (&parser);
+ jsmn_ret = jsmn_parse (&parser, string, string_len, NULL, 0);
+ if (jsmn_ret <= 0)
+ {
+ ret = GRUB_ERR_BAD_ARGUMENT;
+ goto err;
+ }
+
+ json->tokens = grub_calloc (jsmn_ret, sizeof (jsmntok_t));
+ if (!json->tokens)
+ {
+ ret = GRUB_ERR_OUT_OF_MEMORY;
+ goto err;
+ }
+
+ jsmn_init (&parser);
+ jsmn_ret = jsmn_parse (&parser, string, string_len, json->tokens, jsmn_ret);
+ if (jsmn_ret <= 0)
+ {
+ ret = GRUB_ERR_BAD_ARGUMENT;
+ goto err;
+ }
+
+ *out = json;
+
+ err:
+ if (ret)
+ grub_json_free (json);
+
+ return ret;
+}
+
+void
+grub_json_free (grub_json_t *json)
+{
+ if (json)
+ {
+ grub_free (json->tokens);
+ grub_free (json);
+ }
+}
+
+grub_err_t
+grub_json_getsize (grub_size_t *out, const grub_json_t *json)
+{
+ int size;
+
+ size = json->tokens[json->idx].size;
+ if (size < 0)
+ return GRUB_ERR_OUT_OF_RANGE;
+
+ *out = (grub_size_t) size;
+ return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_json_gettype (grub_json_type_t *out, const grub_json_t *json)
+{
+ switch (json->tokens[json->idx].type)
+ {
+ case JSMN_OBJECT:
+ *out = GRUB_JSON_OBJECT;
+ break;
+ case JSMN_ARRAY:
+ *out = GRUB_JSON_ARRAY;
+ break;
+ case JSMN_STRING:
+ *out = GRUB_JSON_STRING;
+ break;
+ case JSMN_PRIMITIVE:
+ *out = GRUB_JSON_PRIMITIVE;
+ break;
+ default:
+ return GRUB_ERR_BAD_ARGUMENT;
+ }
+
+ return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_json_getchild (grub_json_t *out, const grub_json_t *parent, grub_size_t n)
+{
+ grub_size_t offset = 1, size;
+ jsmntok_t *p;
+
+ if (grub_json_getsize (&size, parent) || n >= size)
+ return GRUB_ERR_OUT_OF_RANGE;
+
+ /*
+ * Skip the first n children. For each of the children, we need
+ * to skip their own potential children (e.g. if it's an
+ * array), as well. We thus add the children's size to n on
+ * each iteration.
+ */
+ p = &parent->tokens[parent->idx];
+ while (n--)
+ n += p[offset++].size;
+
+ out->string = parent->string;
+ out->tokens = parent->tokens;
+ out->idx = parent->idx + offset;
+
+ return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_json_getvalue (grub_json_t *out, const grub_json_t *parent, const char *key)
+{
+ grub_json_type_t type;
+ grub_size_t i, size;
+
+ if (grub_json_gettype (&type, parent) || type != GRUB_JSON_OBJECT)
+ return GRUB_ERR_BAD_ARGUMENT;
+
+ if (grub_json_getsize (&size, parent))
+ return GRUB_ERR_BAD_ARGUMENT;
+
+ for (i = 0; i < size; i++)
+ {
+ grub_json_t child;
+ const char *s;
+
+ if (grub_json_getchild (&child, parent, i) ||
+ grub_json_getstring (&s, &child, NULL) ||
+ grub_strcmp (s, key) != 0)
+ continue;
+
+ return grub_json_getchild (out, &child, 0);
+ }
+
+ return GRUB_ERR_FILE_NOT_FOUND;
+}
+
+static grub_err_t
+get_value (grub_json_type_t *out_type, const char **out_string, const grub_json_t *parent, const char *key)
+{
+ const grub_json_t *p = parent;
+ grub_json_t child;
+ grub_err_t ret;
+ jsmntok_t *tok;
+
+ if (key)
+ {
+ ret = grub_json_getvalue (&child, parent, key);
+ if (ret)
+ return ret;
+ p = &child;
+ }
+
+ tok = &p->tokens[p->idx];
+ p->string[tok->end] = '\0';
+
+ *out_string = p->string + tok->start;
+
+ return grub_json_gettype (out_type, p);
+}
+
+grub_err_t
+grub_json_getstring (const char **out, const grub_json_t *parent, const char *key)
+{
+ grub_json_type_t type;
+ const char *value;
+ grub_err_t ret;
+
+ ret = get_value (&type, &value, parent, key);
+ if (ret)
+ return ret;
+ if (type != GRUB_JSON_STRING)
+ return GRUB_ERR_BAD_ARGUMENT;
+
+ *out = value;
+ return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_json_getuint64 (grub_uint64_t *out, const grub_json_t *parent, const char *key)
+{
+ grub_json_type_t type;
+ const char *value;
+ const char *end;
+ grub_err_t ret;
+
+ ret = get_value (&type, &value, parent, key);
+ if (ret)
+ return ret;
+ if (type != GRUB_JSON_STRING && type != GRUB_JSON_PRIMITIVE)
+ return GRUB_ERR_BAD_ARGUMENT;
+
+ grub_errno = GRUB_ERR_NONE;
+ *out = grub_strtoul (value, &end, 10);
+ if (grub_errno != GRUB_ERR_NONE || *end)
+ return GRUB_ERR_BAD_NUMBER;
+
+ return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_json_getint64 (grub_int64_t *out, const grub_json_t *parent, const char *key)
+{
+ grub_json_type_t type;
+ const char *value;
+ const char *end;
+ grub_err_t ret;
+
+ ret = get_value (&type, &value, parent, key);
+ if (ret)
+ return ret;
+ if (type != GRUB_JSON_STRING && type != GRUB_JSON_PRIMITIVE)
+ return GRUB_ERR_BAD_ARGUMENT;
+
+ grub_errno = GRUB_ERR_NONE;
+ *out = grub_strtol (value, &end, 10);
+ if (grub_errno != GRUB_ERR_NONE || *end)
+ return GRUB_ERR_BAD_NUMBER;
+
+ return GRUB_ERR_NONE;
+}
diff --git a/grub-core/lib/json/json.h b/grub-core/lib/json/json.h
new file mode 100644
index 0000000..4ea2a22
--- /dev/null
+++ b/grub-core/lib/json/json.h
@@ -0,0 +1,128 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2019 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_JSON_JSON_H
+#define GRUB_JSON_JSON_H 1
+
+#include <grub/types.h>
+
+enum grub_json_type
+{
+ /* Unordered collection of key-value pairs. */
+ GRUB_JSON_OBJECT,
+ /* Ordered list of zero or more values. */
+ GRUB_JSON_ARRAY,
+ /* Zero or more Unicode characters. */
+ GRUB_JSON_STRING,
+ /* Number, boolean or empty value. */
+ GRUB_JSON_PRIMITIVE,
+ /* Invalid token. */
+ GRUB_JSON_UNDEFINED,
+};
+typedef enum grub_json_type grub_json_type_t;
+
+/* Forward-declaration to avoid including jsmn.h. */
+struct jsmntok;
+
+struct grub_json
+{
+ struct jsmntok *tokens;
+ char *string;
+ grub_size_t idx;
+};
+typedef struct grub_json grub_json_t;
+
+/*
+ * Parse a JSON-encoded string. Note that the string passed to
+ * this function will get modified on subsequent calls to
+ * grub_json_get*(). Returns the root object of the parsed JSON
+ * object, which needs to be free'd via grub_json_free(). Callers
+ * must ensure that the string outlives the returned root object,
+ * and that child objects must not be used after the root object
+ * has been free'd.
+ */
+extern grub_err_t EXPORT_FUNC(grub_json_parse) (grub_json_t **out,
+ char *string,
+ grub_size_t string_len);
+
+/*
+ * Free the structure and its contents. The string passed to
+ * grub_json_parse() will not be free'd.
+ */
+extern void EXPORT_FUNC(grub_json_free) (grub_json_t *json);
+
+/*
+ * Get the child count of a valid grub_json_t instance. Children
+ * are present for arrays, objects (dicts) and keys of a dict.
+ */
+extern grub_err_t EXPORT_FUNC(grub_json_getsize) (grub_size_t *out,
+ const grub_json_t *json);
+
+/* Get the type of a valid grub_json_t instance. */
+extern grub_err_t EXPORT_FUNC(grub_json_gettype) (grub_json_type_t *out,
+ const grub_json_t *json);
+
+/*
+ * Get n'th child of a valid object, array or key. Will return an
+ * error if no such child exists. The result does not need to be
+ * free'd.
+ */
+extern grub_err_t EXPORT_FUNC(grub_json_getchild) (grub_json_t *out,
+ const grub_json_t *parent,
+ grub_size_t n);
+
+/*
+ * Get value of key from a valid grub_json_t instance. The result
+ * does not need to be free'd.
+ */
+extern grub_err_t EXPORT_FUNC(grub_json_getvalue) (grub_json_t *out,
+ const grub_json_t *parent,
+ const char *key);
+
+/*
+ * Get the string representation of a valid grub_json_t instance.
+ * If a key is given and parent is a JSON object, this function
+ * will return the string value of a child mapping to the key.
+ * If no key is given, it will return the string value of the
+ * parent itself.
+ */
+extern grub_err_t EXPORT_FUNC(grub_json_getstring) (const char **out,
+ const grub_json_t *parent,
+ const char *key);
+
+/*
+ * Get the uint64 representation of a valid grub_json_t instance.
+ * Returns an error if the value pointed to by `parent` cannot be
+ * converted to an uint64. See grub_json_getstring() for details
+ * on the key parameter.
+ */
+extern grub_err_t EXPORT_FUNC(grub_json_getuint64) (grub_uint64_t *out,
+ const grub_json_t *parent,
+ const char *key);
+
+/*
+ * Get the int64 representation of a valid grub_json_t instance.
+ * Returns an error if the value pointed to by `parent` cannot be
+ * converted to an int64. See grub_json_getstring() for
+ * details on the key parameter.
+ */
+extern grub_err_t EXPORT_FUNC(grub_json_getint64) (grub_int64_t *out,
+ const grub_json_t *parent,
+ const char *key);
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-29 14:50:48 +0000