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Merge pull request #3236 from guilherme-gm/itemlink
Add logic to generate item links and getitemlink script command
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| /** | ||
| * This file is part of Hercules. | ||
| * http://herc.ws - http://github.com/HerculesWS/Hercules | ||
| * | ||
| * Copyright (C) 2023 Hercules Dev Team | ||
| * Copyright (C) 2023 KirieZ | ||
| * | ||
| * Hercules 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. | ||
| * | ||
| * 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/>. | ||
| */ | ||
| #define HERCULES_CORE | ||
|
|
||
| #include "base62.h" | ||
|
|
||
| #include "common/nullpo.h" | ||
| #include "common/utils.h" | ||
|
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||
| static struct base62_interface base62_s; | ||
| struct base62_interface *base62; | ||
|
|
||
| /** | ||
| * Base 62 conversion table | ||
| */ | ||
| static char base62tbl[62] = { | ||
| '0','1','2','3','4','5','6','7','8', | ||
| '9','a','b','c','d','e','f','g','h', | ||
| 'i','j','k','l','m','n','o','p','q', | ||
| 'r','s','t','u','v','w','x','y','z', | ||
| 'A','B','C','D','E','F','G','H','I', | ||
| 'J','K','L','M','N','O','P','Q','R', | ||
| 'S','T','U','V','W','X','Y','Z' | ||
| }; | ||
|
|
||
| /** | ||
| * base62-Encode `value` into `buf`, which has a size of `buf_len`. | ||
| * If the base62 string is shorter than `min_len`, left pads it with 0 characters. | ||
| * | ||
| * @remark | ||
| * - `buf` will be NULL-terminated, so the maximum number of characters in buffer is always `buf_len` - 1. | ||
| * | ||
| * @param value value to be encoded | ||
| * @param buf buffer where to write the values | ||
| * @param min_len minimum length of the string (left padded with 0 when needed) | ||
| * @param buf_len buffer size (including the NULL termination) | ||
| * @returns true if value was fully encoded, false if something went wrong | ||
| */ | ||
| static bool base62_encode_int_padded(int value, char *buf, int min_len, int buf_len) | ||
| { | ||
| nullpo_retr(false, buf); | ||
| Assert_retr(false, min_len < buf_len); | ||
| Assert_retr(false, buf_len >= 2); | ||
|
|
||
| // if caller ignores an error, at least it gets a NULL-terminated string | ||
| buf[0] = '\0'; | ||
|
|
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| char temp_buf[BASE62_INT_BUFFER_LEN] = { 0 }; | ||
| int max_idx = cap_value(buf_len - 2, 0, BASE62_INT_BUFFER_LEN - 2); | ||
|
|
||
| int idx = 0; | ||
| do { | ||
| temp_buf[idx] = base62tbl[value % 62]; | ||
| value /= 62; | ||
| idx++; | ||
| } while (idx <= max_idx && value > 0); | ||
|
|
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| Assert_retr(false, (value == 0)); | ||
|
|
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| int final_buf_idx = 0; | ||
|
|
||
| if (idx < min_len) { | ||
| int pad_size = min_len - idx; | ||
| for (int i = 0; i < pad_size; ++i) { | ||
| buf[final_buf_idx] = base62tbl[0]; | ||
| final_buf_idx++; | ||
| } | ||
| } | ||
|
|
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| idx--; | ||
|
|
||
| // reverse the string to get the base62-encoded value. | ||
| while (idx >= 0) { | ||
| buf[final_buf_idx] = temp_buf[idx]; | ||
| final_buf_idx++; | ||
| idx--; | ||
| } | ||
| buf[final_buf_idx] = '\0'; | ||
|
|
||
| return (value == 0); | ||
| } | ||
|
|
||
| /** | ||
| * | ||
| **/ | ||
| void base62_defaults(void) | ||
| { | ||
| base62 = &base62_s; | ||
| base62->encode_int_padded = base62_encode_int_padded; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| /** | ||
| * This file is part of Hercules. | ||
| * http://herc.ws - http://github.com/HerculesWS/Hercules | ||
| * | ||
| * Copyright (C) 2023-2023 Hercules Dev Team | ||
| * | ||
| * Hercules 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. | ||
| * | ||
| * 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/>. | ||
| */ | ||
| #ifndef COMMON_BASE62_H | ||
| #define COMMON_BASE62_H | ||
|
|
||
| #include "common/hercules.h" | ||
|
|
||
| /** | ||
| * Minimum size for a buffer to encode UINT32_MAX, including NULL-terminator | ||
| */ | ||
| #define BASE62_INT_BUFFER_LEN 7 | ||
|
|
||
| /** | ||
| * The base62 interface | ||
| **/ | ||
| struct base62_interface { | ||
| bool (*encode_int_padded) (int value, char *buf, int min_len, int buf_len); | ||
| }; | ||
|
|
||
| #ifdef HERCULES_CORE | ||
| void base62_defaults(void); | ||
| #endif // HERCULES_CORE | ||
|
|
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| HPShared struct base62_interface *base62; | ||
|
|
||
| #endif // COMMON_BASE62_H |
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