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diff --git a/sourcemod/scripting/include/json/helpers/decode.inc b/sourcemod/scripting/include/json/helpers/decode.inc
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-/**
- * vim: set ts=4 :
- * =============================================================================
- * sm-json
- * Provides a pure SourcePawn implementation of JSON encoding and decoding.
- * https://github.com/clugg/sm-json
- *
- * sm-json (C)2019 James Dickens. (clug)
- * SourceMod (C)2004-2008 AlliedModders LLC. All rights reserved.
- * =============================================================================
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License, version 3.0, as published by the
- * Free Software Foundation.
- *
- * This program 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
- * this program. If not, see <http://www.gnu.org/licenses/>.
- *
- * As a special exception, AlliedModders LLC gives you permission to link the
- * code of this program (as well as its derivative works) to "Half-Life 2," the
- * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
- * by the Valve Corporation. You must obey the GNU General Public License in
- * all respects for all other code used. Additionally, AlliedModders LLC grants
- * this exception to all derivative works. AlliedModders LLC defines further
- * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
- * or <http://www.sourcemod.net/license.php>.
- */
-
-#if defined _json_helpers_decode_included
- #endinput
-#endif
-#define _json_helpers_decode_included
-
-#include <string>
-
-/**
- * @section Determine Buffer Contents
- */
-
-/**
- * Checks whether the character at the beginning
- * of the buffer is whitespace.
- *
- * @param buffer String buffer of data.
- * @returns True if the first character in the buffer
- * is whitespace, false otherwise.
- */
-stock bool json_is_whitespace(const char[] buffer)
-{
- return buffer[0] == ' '
- || buffer[0] == '\t'
- || buffer[0] == '\r'
- || buffer[0] == '\n';
-}
-
-/**
- * Checks whether the character at the beginning
- * of the buffer is the start of a string.
- *
- * @param buffer String buffer of data.
- * @returns True if the first character in the buffer
- * is the start of a string, false otherwise.
- */
-stock bool json_is_string(const char[] buffer)
-{
- return buffer[0] == '"';
-}
-
-/**
- * Checks whether the buffer provided contains an int.
- *
- * @param buffer String buffer of data.
- * @returns True if buffer contains an int, false otherwise.
- */
-stock bool json_is_int(const char[] buffer)
-{
- bool starts_with_zero = false;
- bool has_digit_gt_zero = false;
-
- int length = strlen(buffer);
- for (int i = 0; i < length; ++i) {
- // allow minus as first character only
- if (i == 0 && buffer[i] == '-') {
- continue;
- }
-
- if (IsCharNumeric(buffer[i])) {
- if (buffer[i] == '0') {
- if (starts_with_zero) {
- // detect repeating leading zeros
- return false;
- } else if (! has_digit_gt_zero) {
- starts_with_zero = true;
- }
- } else {
- has_digit_gt_zero = true;
- }
- } else {
- return false;
- }
- }
-
- // buffer must start with zero and have no other numerics before decimal
- // OR not start with zero and have other numerics
- return (starts_with_zero && ! has_digit_gt_zero)
- || (! starts_with_zero && has_digit_gt_zero);
-}
-
-/**
- * Checks whether the buffer provided contains a float.
- *
- * @param buffer String buffer of data.
- * @returns True if buffer contains a float, false otherwise.
- */
-stock bool json_is_float(const char[] buffer)
-{
- bool starts_with_zero = false;
- bool has_digit_gt_zero = false;
- bool after_decimal = false;
- bool has_digit_after_decimal = false;
- bool after_exponent = false;
- bool has_digit_after_exponent = false;
-
- int length = strlen(buffer);
- for (int i = 0; i < length; ++i) {
- // allow minus as first character only
- if (i == 0 && buffer[i] == '-') {
- continue;
- }
-
- // if we haven't encountered a decimal or exponent yet
- if (! after_decimal && ! after_exponent) {
- if (buffer[i] == '.') {
- // if we encounter a decimal before any digits
- if (! starts_with_zero && ! has_digit_gt_zero) {
- return false;
- }
-
- after_decimal = true;
- } else if (buffer[i] == 'e' || buffer[i] == 'E') {
- // if we encounter an exponent before any non-zero digits
- if (starts_with_zero && ! has_digit_gt_zero) {
- return false;
- }
-
- after_exponent = true;
- } else if (IsCharNumeric(buffer[i])) {
- if (buffer[i] == '0') {
- if (starts_with_zero) {
- // detect repeating leading zeros
- return false;
- } else if (! has_digit_gt_zero) {
- starts_with_zero = true;
- }
- } else {
- has_digit_gt_zero = true;
- }
- } else {
- return false;
- }
- } else if (after_decimal && ! after_exponent) {
- // after decimal has been encountered, allow any numerics
- if (IsCharNumeric(buffer[i])) {
- has_digit_after_decimal = true;
- } else if (buffer[i] == 'e' || buffer[i] == 'E') {
- if (! has_digit_after_decimal) {
- // detect exponents directly after decimal
- return false;
- }
-
- after_exponent = true;
- } else {
- return false;
- }
- } else if (after_exponent) {
- if (
- (buffer[i] == '+' || buffer[i] == '-')
- && (buffer[i - 1] == 'e' || buffer[i - 1] == 'E')
- ) {
- // allow + or - directly after exponent
- continue;
- } else if (IsCharNumeric(buffer[i])) {
- has_digit_after_exponent = true;
- } else {
- return false;
- }
- }
- }
-
- if (starts_with_zero && has_digit_gt_zero) {
- /* if buffer starts with zero, there should
- be no other digits before the decimal */
- return false;
- }
-
- // if we have a decimal, there should be digit(s) after it
- if (after_decimal) {
- if (! has_digit_after_decimal) {
- return false;
- }
- }
-
- // if we have an exponent, there should be digit(s) after it
- if (after_exponent) {
- if (! has_digit_after_exponent) {
- return false;
- }
- }
-
- /* we should have reached an exponent, decimal, or both.
- otherwise, this number can be handled by the int parser */
- return after_decimal || after_exponent;
-}
-
-/**
- * Checks whether the buffer provided contains a bool.
- *
- * @param buffer String buffer of data.
- * @returns True if buffer contains a bool, false otherwise.
- */
-stock bool json_is_bool(const char[] buffer)
-{
- return StrEqual(buffer, "true") || StrEqual(buffer, "false");
-}
-
-/**
- * Checks whether the buffer provided contains null.
- *
- * @param buffer String buffer of data.
- * @returns True if buffer contains null, false otherwise.
- */
-stock bool json_is_null(const char[] buffer)
-{
- return StrEqual(buffer, "null");
-}
-
-/**
- * Checks whether the character at the beginning
- * of the buffer is the start of an object.
- *
- * @param buffer String buffer of data.
- * @returns True if the first character in the buffer is
- * the start of an object, false otherwise.
- */
-stock bool json_is_object(const char[] buffer)
-{
- return buffer[0] == '{';
-}
-
-/**
- * Checks whether the character at the beginning
- * of the buffer is the end of an object.
- *
- * @param buffer String buffer of data.
- * @returns True if the first character in the buffer is
- * the end of an object, false otherwise.
- */
-stock bool json_is_object_end(const char[] buffer)
-{
- return buffer[0] == '}';
-}
-
-/**
- * Checks whether the character at the beginning
- * of the buffer is the start of an array.
- *
- * @param buffer String buffer of data.
- * @returns True if the first character in the buffer is
- * the start of an array, false otherwise.
- */
-stock bool json_is_array(const char[] buffer)
-{
- return buffer[0] == '[';
-}
-
-/**
- * Checks whether the character at the beginning
- * of the buffer is the end of an array.
- *
- * @param buffer String buffer of data.
- * @returns True if the first character in the buffer is
- * the end of an array, false otherwise.
- */
-stock bool json_is_array_end(const char[] buffer)
-{
- return buffer[0] == ']';
-}
-
-/**
- * Checks whether the character at the beginning of the buffer
- * is considered a valid 'end point' for some data, such as a
- * colon (indicating a key), a comma (indicating a new element),
- * or the end of an object or array.
- *
- * @param buffer String buffer of data.
- * @returns True if the first character in the buffer
- * is a valid data end point, false otherwise.
- */
-stock bool json_is_at_end(const char[] buffer, bool is_array)
-{
- return buffer[0] == ','
- || (! is_array && buffer[0] == ':')
- || json_is_object_end(buffer[0])
- || json_is_array_end(buffer[0]);
-}
-
-/**
- * @section Extract Contents from Buffer
- */
-
-/**
- * Moves the position until it reaches a non-whitespace
- * character or the end of the buffer's maximum size.
- *
- * @param buffer String buffer of data.
- * @param max_size Maximum size of string buffer.
- * @param pos Position to increment.
- * @returns True if pos has not reached the end
- * of the buffer, false otherwise.
- */
-stock bool json_skip_whitespace(const char[] buffer, int max_size, int &pos)
-{
- while (json_is_whitespace(buffer[pos]) && pos < max_size) {
- ++pos;
- }
-
- return pos < max_size;
-}
-
-/**
- * Extracts a JSON cell from the buffer until
- * a valid end point is reached.
- *
- * @param buffer String buffer of data.
- * @param max_size Maximum size of string buffer.
- * @param pos Position to increment.
- * @param output String buffer to store output.
- * @param output_max_size Maximum size of output string buffer.
- * @param is_array Whether the decoder is processing an array.
- * @returns True if pos has not reached the end
- * of the buffer, false otherwise.
- */
-stock bool json_extract_until_end(
- const char[] buffer,
- int max_size,
- int &pos,
- char[] output,
- int output_max_size,
- bool is_array
-) {
- strcopy(output, output_max_size, "");
-
- // set start to position of first character in cell
- int start = pos;
-
- // while we haven't hit whitespace, an end point or the end of the buffer
- while (
- ! json_is_whitespace(buffer[pos])
- && ! json_is_at_end(buffer[pos], is_array)
- && pos < max_size
- ) {
- ++pos;
- }
-
- // set end to the current position
- int end = pos;
-
- // skip any following whitespace
- json_skip_whitespace(buffer, max_size, pos);
-
- // if we aren't at a valid endpoint, extraction has failed
- if (! json_is_at_end(buffer[pos], is_array)) {
- return false;
- }
-
- // copy only from start with length end - start + NULL terminator
- strcopy(output, end - start + 1, buffer[start]);
-
- return pos < max_size;
-}
-
-/**
- * Extracts a JSON string from the buffer until
- * a valid end point is reached.
- *
- * @param buffer String buffer of data.
- * @param max_size Maximum size of string buffer.
- * @param pos Position to increment.
- * @param output String buffer to store output.
- * @param output_max_size Maximum size of output string buffer.
- * @param is_array Whether the decoder is processing an array.
- * @returns True if pos has not reached the end
- * of the buffer, false otherwise.
- */
-stock bool json_extract_string(
- const char[] buffer,
- int max_size,
- int &pos,
- char[] output,
- int output_max_size,
- bool is_array
-) {
- strcopy(output, output_max_size, "");
-
- // increment past opening quote
- ++pos;
-
- // set start to position of first character in string
- int start = pos;
-
- // while we haven't hit the end of the buffer
- while (pos < max_size) {
- // check for unescaped control characters
- if (
- buffer[pos] == '\b'
- || buffer[pos] == '\f'
- || buffer[pos] == '\n'
- || buffer[pos] == '\r'
- || buffer[pos] == '\t'
- ) {
- return false;
- }
-
- if (buffer[pos] == '"') {
- // count preceding backslashes to check if quote is escaped
- int search_pos = pos;
- int preceding_backslashes = 0;
- while (search_pos > 0 && buffer[--search_pos] == '\\') {
- ++preceding_backslashes;
- }
-
- // if we have an even number of backslashes, the quote is not escaped
- if (preceding_backslashes % 2 == 0) {
- break;
- }
- }
-
- // pass over the character as it is part of the string
- ++pos;
- }
-
- // set end to the current position
- int end = pos;
-
- // increment past closing quote
- ++pos;
-
- // skip trailing whitespace
- if (! json_skip_whitespace(buffer, max_size, pos)) {
- return false;
- }
-
- // if we haven't reached an ending character at the end of the cell,
- // there is likely junk data not encapsulated by a string
- if (! json_is_at_end(buffer[pos], is_array)) {
- return false;
- }
-
- // copy only from start with length end - start + NULL terminator
- strcopy(output, end - start + 1, buffer[start]);
- json_unescape_string(output, max_size);
-
- return pos < max_size;
-}
-
-/**
- * Extracts an int from the buffer.
- *
- * @param buffer String buffer of data.
- * @returns Int value of the buffer.
- */
-stock int json_extract_int(const char[] buffer)
-{
- return StringToInt(buffer);
-}
-
-/**
- * Extracts a float from the buffer.
- *
- * @param buffer String buffer of data.
- * @returns Float value of the buffer.
- */
-stock float json_extract_float(const char[] buffer)
-{
- return StringToFloat(buffer);
-}
-
-/**
- * Extracts a bool from the buffer.
- *
- * @param buffer String buffer of data.
- * @returns Bool value of the buffer.
- */
-stock bool json_extract_bool(const char[] buffer)
-{
- return StrEqual(buffer, "true");
-}
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