--- /dev/null
+/*
+ * Copyright (c) 2009-2016 Petri Lehtinen <petri@digip.org>
+ * Copyright (c) 2011-2012 Graeme Smecher <graeme.smecher@mail.mcgill.ca>
+ *
+ * Jansson is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See LICENSE for details.
+ */
+
+#include <string.h>
+#include "jansson.h"
+#include "jansson_private.h"
+#include "utf.h"
+
+typedef struct {
+ int line;
+ int column;
+ size_t pos;
+ char token;
+} token_t;
+
+typedef struct {
+ const char *start;
+ const char *fmt;
+ token_t prev_token;
+ token_t token;
+ token_t next_token;
+ json_error_t *error;
+ size_t flags;
+ int line;
+ int column;
+ size_t pos;
+ int has_error;
+} scanner_t;
+
+#define token(scanner) ((scanner)->token.token)
+
+static const char * const type_names[] = {
+ "object",
+ "array",
+ "string",
+ "integer",
+ "real",
+ "true",
+ "false",
+ "null"
+};
+
+#define type_name(x) type_names[json_typeof(x)]
+
+static const char unpack_value_starters[] = "{[siIbfFOon";
+
+static void scanner_init(scanner_t *s, json_error_t *error,
+ size_t flags, const char *fmt)
+{
+ s->error = error;
+ s->flags = flags;
+ s->fmt = s->start = fmt;
+ memset(&s->prev_token, 0, sizeof(token_t));
+ memset(&s->token, 0, sizeof(token_t));
+ memset(&s->next_token, 0, sizeof(token_t));
+ s->line = 1;
+ s->column = 0;
+ s->pos = 0;
+ s->has_error = 0;
+}
+
+static void next_token(scanner_t *s)
+{
+ const char *t;
+ s->prev_token = s->token;
+
+ if(s->next_token.line) {
+ s->token = s->next_token;
+ s->next_token.line = 0;
+ return;
+ }
+
+ t = s->fmt;
+ s->column++;
+ s->pos++;
+
+ /* skip space and ignored chars */
+ while(*t == ' ' || *t == '\t' || *t == '\n' || *t == ',' || *t == ':') {
+ if(*t == '\n') {
+ s->line++;
+ s->column = 1;
+ }
+ else
+ s->column++;
+
+ s->pos++;
+ t++;
+ }
+
+ s->token.token = *t;
+ s->token.line = s->line;
+ s->token.column = s->column;
+ s->token.pos = s->pos;
+
+ t++;
+ s->fmt = t;
+}
+
+static void prev_token(scanner_t *s)
+{
+ s->next_token = s->token;
+ s->token = s->prev_token;
+}
+
+static void set_error(scanner_t *s, const char *source, enum json_error_code code,
+ const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+
+ jsonp_error_vset(s->error, s->token.line, s->token.column, s->token.pos,
+ code, fmt, ap);
+
+ jsonp_error_set_source(s->error, source);
+
+ va_end(ap);
+}
+
+static json_t *pack(scanner_t *s, va_list *ap);
+
+
+/* ours will be set to 1 if jsonp_free() must be called for the result
+ afterwards */
+static char *read_string(scanner_t *s, va_list *ap,
+ const char *purpose, size_t *out_len, int *ours)
+{
+ char t;
+ strbuffer_t strbuff;
+ const char *str;
+ size_t length;
+
+ next_token(s);
+ t = token(s);
+ prev_token(s);
+
+ *ours = 0;
+ if(t != '#' && t != '%' && t != '+') {
+ /* Optimize the simple case */
+ str = va_arg(*ap, const char *);
+
+ if(!str) {
+ set_error(s, "<args>", json_error_null_value, "NULL string argument");
+ return NULL;
+ }
+
+ length = strlen(str);
+
+ if(!utf8_check_string(str, length)) {
+ set_error(s, "<args>", json_error_invalid_utf8, "Invalid UTF-8 %s", purpose);
+ return NULL;
+ }
+
+ *out_len = length;
+ return (char *)str;
+ }
+
+ strbuffer_init(&strbuff);
+
+ while(1) {
+ str = va_arg(*ap, const char *);
+ if(!str) {
+ set_error(s, "<args>", json_error_null_value, "NULL string argument");
+ s->has_error = 1;
+ }
+
+ next_token(s);
+
+ if(token(s) == '#') {
+ length = va_arg(*ap, int);
+ }
+ else if(token(s) == '%') {
+ length = va_arg(*ap, size_t);
+ }
+ else {
+ prev_token(s);
+ length = s->has_error ? 0 : strlen(str);
+ }
+
+ if(!s->has_error && strbuffer_append_bytes(&strbuff, str, length) == -1) {
+ set_error(s, "<internal>", json_error_out_of_memory, "Out of memory");
+ s->has_error = 1;
+ }
+
+ next_token(s);
+ if(token(s) != '+') {
+ prev_token(s);
+ break;
+ }
+ }
+
+ if(s->has_error) {
+ strbuffer_close(&strbuff);
+ return NULL;
+ }
+
+ if(!utf8_check_string(strbuff.value, strbuff.length)) {
+ set_error(s, "<args>", json_error_invalid_utf8, "Invalid UTF-8 %s", purpose);
+ strbuffer_close(&strbuff);
+ s->has_error = 1;
+ return NULL;
+ }
+
+ *out_len = strbuff.length;
+ *ours = 1;
+ return strbuffer_steal_value(&strbuff);
+}
+
+static json_t *pack_object(scanner_t *s, va_list *ap)
+{
+ json_t *object = json_object();
+ next_token(s);
+
+ while(token(s) != '}') {
+ char *key;
+ size_t len;
+ int ours;
+ json_t *value;
+
+ if(!token(s)) {
+ set_error(s, "<format>", json_error_invalid_format, "Unexpected end of format string");
+ goto error;
+ }
+
+ if(token(s) != 's') {
+ set_error(s, "<format>", json_error_invalid_format, "Expected format 's', got '%c'", token(s));
+ goto error;
+ }
+
+ key = read_string(s, ap, "object key", &len, &ours);
+ if (!key)
+ s->has_error = 1;
+
+ next_token(s);
+
+ value = pack(s, ap);
+ if(!value) {
+ if(ours)
+ jsonp_free(key);
+
+ if(strchr("soO", token(s)) && s->next_token.token == '*') {
+ next_token(s);
+ } else {
+ s->has_error = 1;
+ }
+
+ next_token(s);
+ continue;
+ }
+
+ if(s->has_error)
+ json_decref(value);
+
+ if(!s->has_error && json_object_set_new_nocheck(object, key, value)) {
+ set_error(s, "<internal>", json_error_out_of_memory, "Unable to add key \"%s\"", key);
+ s->has_error = 1;
+ }
+
+ if(ours)
+ jsonp_free(key);
+
+ if(strchr("soO", token(s)) && s->next_token.token == '*')
+ next_token(s);
+ next_token(s);
+ }
+
+ if(!s->has_error)
+ return object;
+
+error:
+ json_decref(object);
+ return NULL;
+}
+
+static json_t *pack_array(scanner_t *s, va_list *ap)
+{
+ json_t *array = json_array();
+ next_token(s);
+
+ while(token(s) != ']') {
+ json_t *value;
+
+ if(!token(s)) {
+ set_error(s, "<format>", json_error_invalid_format, "Unexpected end of format string");
+ /* Format string errors are unrecoverable. */
+ goto error;
+ }
+
+ value = pack(s, ap);
+ if(!value) {
+ if(strchr("soO", token(s)) && s->next_token.token == '*') {
+ next_token(s);
+ } else {
+ s->has_error = 1;
+ }
+
+ next_token(s);
+ continue;
+ }
+
+ if(s->has_error)
+ json_decref(value);
+
+ if(!s->has_error && json_array_append_new(array, value)) {
+ set_error(s, "<internal>", json_error_out_of_memory, "Unable to append to array");
+ s->has_error = 1;
+ }
+
+ if(strchr("soO", token(s)) && s->next_token.token == '*')
+ next_token(s);
+ next_token(s);
+ }
+
+ if(!s->has_error)
+ return array;
+
+error:
+ json_decref(array);
+ return NULL;
+}
+
+static json_t *pack_string(scanner_t *s, va_list *ap)
+{
+ char *str;
+ size_t len;
+ int ours;
+ int nullable;
+
+ next_token(s);
+ nullable = token(s) == '?';
+ if (!nullable)
+ prev_token(s);
+
+ str = read_string(s, ap, "string", &len, &ours);
+ if (!str) {
+ return nullable ? json_null() : NULL;
+ } else if (ours) {
+ return jsonp_stringn_nocheck_own(str, len);
+ } else {
+ return json_stringn_nocheck(str, len);
+ }
+}
+
+static json_t *pack(scanner_t *s, va_list *ap)
+{
+ switch(token(s)) {
+ case '{':
+ return pack_object(s, ap);
+
+ case '[':
+ return pack_array(s, ap);
+
+ case 's': /* string */
+ return pack_string(s, ap);
+
+ case 'n': /* null */
+ return json_null();
+
+ case 'b': /* boolean */
+ return va_arg(*ap, int) ? json_true() : json_false();
+
+ case 'i': /* integer from int */
+ return json_integer(va_arg(*ap, int));
+
+ case 'I': /* integer from json_int_t */
+ return json_integer(va_arg(*ap, json_int_t));
+
+ case 'f': /* real */
+ return json_real(va_arg(*ap, double));
+
+ case 'O': /* a json_t object; increments refcount */
+ {
+ int nullable;
+ json_t *json;
+
+ next_token(s);
+ nullable = token(s) == '?';
+ if (!nullable)
+ prev_token(s);
+
+ json = va_arg(*ap, json_t *);
+ if (!json && nullable) {
+ return json_null();
+ } else {
+ return json_incref(json);
+ }
+ }
+
+ case 'o': /* a json_t object; doesn't increment refcount */
+ {
+ int nullable;
+ json_t *json;
+
+ next_token(s);
+ nullable = token(s) == '?';
+ if (!nullable)
+ prev_token(s);
+
+ json = va_arg(*ap, json_t *);
+ if (!json && nullable) {
+ return json_null();
+ } else {
+ return json;
+ }
+ }
+
+ default:
+ set_error(s, "<format>", json_error_invalid_format, "Unexpected format character '%c'",
+ token(s));
+ s->has_error = 1;
+ return NULL;
+ }
+}
+
+static int unpack(scanner_t *s, json_t *root, va_list *ap);
+
+static int unpack_object(scanner_t *s, json_t *root, va_list *ap)
+{
+ int ret = -1;
+ int strict = 0;
+ int gotopt = 0;
+
+ /* Use a set (emulated by a hashtable) to check that all object
+ keys are accessed. Checking that the correct number of keys
+ were accessed is not enough, as the same key can be unpacked
+ multiple times.
+ */
+ hashtable_t key_set;
+
+ if(hashtable_init(&key_set)) {
+ set_error(s, "<internal>", json_error_out_of_memory, "Out of memory");
+ return -1;
+ }
+
+ if(root && !json_is_object(root)) {
+ set_error(s, "<validation>", json_error_wrong_type, "Expected object, got %s",
+ type_name(root));
+ goto out;
+ }
+ next_token(s);
+
+ while(token(s) != '}') {
+ const char *key;
+ json_t *value;
+ int opt = 0;
+
+ if(strict != 0) {
+ set_error(s, "<format>", json_error_invalid_format, "Expected '}' after '%c', got '%c'",
+ (strict == 1 ? '!' : '*'), token(s));
+ goto out;
+ }
+
+ if(!token(s)) {
+ set_error(s, "<format>", json_error_invalid_format, "Unexpected end of format string");
+ goto out;
+ }
+
+ if(token(s) == '!' || token(s) == '*') {
+ strict = (token(s) == '!' ? 1 : -1);
+ next_token(s);
+ continue;
+ }
+
+ if(token(s) != 's') {
+ set_error(s, "<format>", json_error_invalid_format, "Expected format 's', got '%c'", token(s));
+ goto out;
+ }
+
+ key = va_arg(*ap, const char *);
+ if(!key) {
+ set_error(s, "<args>", json_error_null_value, "NULL object key");
+ goto out;
+ }
+
+ next_token(s);
+
+ if(token(s) == '?') {
+ opt = gotopt = 1;
+ next_token(s);
+ }
+
+ if(!root) {
+ /* skipping */
+ value = NULL;
+ }
+ else {
+ value = json_object_get(root, key);
+ if(!value && !opt) {
+ set_error(s, "<validation>", json_error_item_not_found, "Object item not found: %s", key);
+ goto out;
+ }
+ }
+
+ if(unpack(s, value, ap))
+ goto out;
+
+ hashtable_set(&key_set, key, json_null());
+ next_token(s);
+ }
+
+ if(strict == 0 && (s->flags & JSON_STRICT))
+ strict = 1;
+
+ if(root && strict == 1) {
+ /* We need to check that all non optional items have been parsed */
+ const char *key;
+ int have_unrecognized_keys = 0;
+ strbuffer_t unrecognized_keys;
+ json_t *value;
+ long unpacked = 0;
+ if (gotopt) {
+ /* We have optional keys, we need to iter on each key */
+ json_object_foreach(root, key, value) {
+ if(!hashtable_get(&key_set, key)) {
+ unpacked++;
+
+ /* Save unrecognized keys for the error message */
+ if (!have_unrecognized_keys) {
+ strbuffer_init(&unrecognized_keys);
+ have_unrecognized_keys = 1;
+ } else {
+ strbuffer_append_bytes(&unrecognized_keys, ", ", 2);
+ }
+ strbuffer_append_bytes(&unrecognized_keys, key, strlen(key));
+ }
+ }
+ } else {
+ /* No optional keys, we can just compare the number of items */
+ unpacked = (long)json_object_size(root) - (long)key_set.size;
+ }
+ if (unpacked) {
+ if (!gotopt) {
+ /* Save unrecognized keys for the error message */
+ json_object_foreach(root, key, value) {
+ if(!hashtable_get(&key_set, key)) {
+ if (!have_unrecognized_keys) {
+ strbuffer_init(&unrecognized_keys);
+ have_unrecognized_keys = 1;
+ } else {
+ strbuffer_append_bytes(&unrecognized_keys, ", ", 2);
+ }
+ strbuffer_append_bytes(&unrecognized_keys, key, strlen(key));
+ }
+ }
+ }
+ set_error(s, "<validation>", json_error_end_of_input_expected,
+ "%li object item(s) left unpacked: %s",
+ unpacked, strbuffer_value(&unrecognized_keys));
+ strbuffer_close(&unrecognized_keys);
+ goto out;
+ }
+ }
+
+ ret = 0;
+
+out:
+ hashtable_close(&key_set);
+ return ret;
+}
+
+static int unpack_array(scanner_t *s, json_t *root, va_list *ap)
+{
+ size_t i = 0;
+ int strict = 0;
+
+ if(root && !json_is_array(root)) {
+ set_error(s, "<validation>", json_error_wrong_type, "Expected array, got %s", type_name(root));
+ return -1;
+ }
+ next_token(s);
+
+ while(token(s) != ']') {
+ json_t *value;
+
+ if(strict != 0) {
+ set_error(s, "<format>", json_error_invalid_format, "Expected ']' after '%c', got '%c'",
+ (strict == 1 ? '!' : '*'),
+ token(s));
+ return -1;
+ }
+
+ if(!token(s)) {
+ set_error(s, "<format>", json_error_invalid_format, "Unexpected end of format string");
+ return -1;
+ }
+
+ if(token(s) == '!' || token(s) == '*') {
+ strict = (token(s) == '!' ? 1 : -1);
+ next_token(s);
+ continue;
+ }
+
+ if(!strchr(unpack_value_starters, token(s))) {
+ set_error(s, "<format>", json_error_invalid_format, "Unexpected format character '%c'",
+ token(s));
+ return -1;
+ }
+
+ if(!root) {
+ /* skipping */
+ value = NULL;
+ }
+ else {
+ value = json_array_get(root, i);
+ if(!value) {
+ set_error(s, "<validation>", json_error_index_out_of_range, "Array index %lu out of range",
+ (unsigned long)i);
+ return -1;
+ }
+ }
+
+ if(unpack(s, value, ap))
+ return -1;
+
+ next_token(s);
+ i++;
+ }
+
+ if(strict == 0 && (s->flags & JSON_STRICT))
+ strict = 1;
+
+ if(root && strict == 1 && i != json_array_size(root)) {
+ long diff = (long)json_array_size(root) - (long)i;
+ set_error(s, "<validation>", json_error_end_of_input_expected, "%li array item(s) left unpacked", diff);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int unpack(scanner_t *s, json_t *root, va_list *ap)
+{
+ switch(token(s))
+ {
+ case '{':
+ return unpack_object(s, root, ap);
+
+ case '[':
+ return unpack_array(s, root, ap);
+
+ case 's':
+ if(root && !json_is_string(root)) {
+ set_error(s, "<validation>", json_error_wrong_type, "Expected string, got %s",
+ type_name(root));
+ return -1;
+ }
+
+ if(!(s->flags & JSON_VALIDATE_ONLY)) {
+ const char **str_target;
+ size_t *len_target = NULL;
+
+ str_target = va_arg(*ap, const char **);
+ if(!str_target) {
+ set_error(s, "<args>", json_error_null_value, "NULL string argument");
+ return -1;
+ }
+
+ next_token(s);
+
+ if(token(s) == '%') {
+ len_target = va_arg(*ap, size_t *);
+ if(!len_target) {
+ set_error(s, "<args>", json_error_null_value, "NULL string length argument");
+ return -1;
+ }
+ }
+ else
+ prev_token(s);
+
+ if(root) {
+ *str_target = json_string_value(root);
+ if(len_target)
+ *len_target = json_string_length(root);
+ }
+ }
+ return 0;
+
+ case 'i':
+ if(root && !json_is_integer(root)) {
+ set_error(s, "<validation>", json_error_wrong_type, "Expected integer, got %s",
+ type_name(root));
+ return -1;
+ }
+
+ if(!(s->flags & JSON_VALIDATE_ONLY)) {
+ int *target = va_arg(*ap, int*);
+ if(root)
+ *target = (int)json_integer_value(root);
+ }
+
+ return 0;
+
+ case 'I':
+ if(root && !json_is_integer(root)) {
+ set_error(s, "<validation>", json_error_wrong_type, "Expected integer, got %s",
+ type_name(root));
+ return -1;
+ }
+
+ if(!(s->flags & JSON_VALIDATE_ONLY)) {
+ json_int_t *target = va_arg(*ap, json_int_t*);
+ if(root)
+ *target = json_integer_value(root);
+ }
+
+ return 0;
+
+ case 'b':
+ if(root && !json_is_boolean(root)) {
+ set_error(s, "<validation>", json_error_wrong_type, "Expected true or false, got %s",
+ type_name(root));
+ return -1;
+ }
+
+ if(!(s->flags & JSON_VALIDATE_ONLY)) {
+ int *target = va_arg(*ap, int*);
+ if(root)
+ *target = json_is_true(root);
+ }
+
+ return 0;
+
+ case 'f':
+ if(root && !json_is_real(root)) {
+ set_error(s, "<validation>", json_error_wrong_type, "Expected real, got %s",
+ type_name(root));
+ return -1;
+ }
+
+ if(!(s->flags & JSON_VALIDATE_ONLY)) {
+ double *target = va_arg(*ap, double*);
+ if(root)
+ *target = json_real_value(root);
+ }
+
+ return 0;
+
+ case 'F':
+ if(root && !json_is_number(root)) {
+ set_error(s, "<validation>", json_error_wrong_type, "Expected real or integer, got %s",
+ type_name(root));
+ return -1;
+ }
+
+ if(!(s->flags & JSON_VALIDATE_ONLY)) {
+ double *target = va_arg(*ap, double*);
+ if(root)
+ *target = json_number_value(root);
+ }
+
+ return 0;
+
+ case 'O':
+ if(root && !(s->flags & JSON_VALIDATE_ONLY))
+ json_incref(root);
+ /* Fall through */
+
+ case 'o':
+ if(!(s->flags & JSON_VALIDATE_ONLY)) {
+ json_t **target = va_arg(*ap, json_t**);
+ if(root)
+ *target = root;
+ }
+
+ return 0;
+
+ case 'n':
+ /* Never assign, just validate */
+ if(root && !json_is_null(root)) {
+ set_error(s, "<validation>", json_error_wrong_type, "Expected null, got %s",
+ type_name(root));
+ return -1;
+ }
+ return 0;
+
+ default:
+ set_error(s, "<format>", json_error_invalid_format, "Unexpected format character '%c'",
+ token(s));
+ return -1;
+ }
+}
+
+json_t *json_vpack_ex(json_error_t *error, size_t flags,
+ const char *fmt, va_list ap)
+{
+ scanner_t s;
+ va_list ap_copy;
+ json_t *value;
+
+ if(!fmt || !*fmt) {
+ jsonp_error_init(error, "<format>");
+ jsonp_error_set(error, -1, -1, 0, json_error_invalid_argument, "NULL or empty format string");
+ return NULL;
+ }
+ jsonp_error_init(error, NULL);
+
+ scanner_init(&s, error, flags, fmt);
+ next_token(&s);
+
+ va_copy(ap_copy, ap);
+ value = pack(&s, &ap_copy);
+ va_end(ap_copy);
+
+ if(!value)
+ return NULL;
+
+ next_token(&s);
+ if(token(&s)) {
+ json_decref(value);
+ set_error(&s, "<format>", json_error_invalid_format, "Garbage after format string");
+ return NULL;
+ }
+ if(s.has_error) {
+ json_decref(value);
+ return NULL;
+ }
+
+ return value;
+}
+
+json_t *json_pack_ex(json_error_t *error, size_t flags, const char *fmt, ...)
+{
+ json_t *value;
+ va_list ap;
+
+ va_start(ap, fmt);
+ value = json_vpack_ex(error, flags, fmt, ap);
+ va_end(ap);
+
+ return value;
+}
+
+json_t *json_pack(const char *fmt, ...)
+{
+ json_t *value;
+ va_list ap;
+
+ va_start(ap, fmt);
+ value = json_vpack_ex(NULL, 0, fmt, ap);
+ va_end(ap);
+
+ return value;
+}
+
+int json_vunpack_ex(json_t *root, json_error_t *error, size_t flags,
+ const char *fmt, va_list ap)
+{
+ scanner_t s;
+ va_list ap_copy;
+
+ if(!root) {
+ jsonp_error_init(error, "<root>");
+ jsonp_error_set(error, -1, -1, 0, json_error_null_value, "NULL root value");
+ return -1;
+ }
+
+ if(!fmt || !*fmt) {
+ jsonp_error_init(error, "<format>");
+ jsonp_error_set(error, -1, -1, 0, json_error_invalid_argument, "NULL or empty format string");
+ return -1;
+ }
+ jsonp_error_init(error, NULL);
+
+ scanner_init(&s, error, flags, fmt);
+ next_token(&s);
+
+ va_copy(ap_copy, ap);
+ if(unpack(&s, root, &ap_copy)) {
+ va_end(ap_copy);
+ return -1;
+ }
+ va_end(ap_copy);
+
+ next_token(&s);
+ if(token(&s)) {
+ set_error(&s, "<format>", json_error_invalid_format, "Garbage after format string");
+ return -1;
+ }
+
+ return 0;
+}
+
+int json_unpack_ex(json_t *root, json_error_t *error, size_t flags, const char *fmt, ...)
+{
+ int ret;
+ va_list ap;
+
+ va_start(ap, fmt);
+ ret = json_vunpack_ex(root, error, flags, fmt, ap);
+ va_end(ap);
+
+ return ret;
+}
+
+int json_unpack(json_t *root, const char *fmt, ...)
+{
+ int ret;
+ va_list ap;
+
+ va_start(ap, fmt);
+ ret = json_vunpack_ex(root, NULL, 0, fmt, ap);
+ va_end(ap);
+
+ return ret;
+}
projects / proxmark3-svn / blobdiff