minecraft-pi-reborn/libreborn/src/util/string.c

149 lines
5.9 KiB
C
Raw Normal View History

2022-07-20 06:58:14 +00:00
#include <iconv.h>
#include <stdint.h>
2022-03-14 23:09:25 +00:00
#include <libreborn/string.h>
// Sanitize String
void sanitize_string(char **str, int max_length, unsigned int allow_newlines) {
// Store Message Length
int length = strlen(*str);
// Truncate Message
if (max_length != -1 && length > max_length) {
(*str)[max_length] = '\0';
length = max_length;
}
// Loop Through Message
2022-07-20 06:58:14 +00:00
if (!allow_newlines) {
for (int i = 0; i < length; i++) {
if ((*str)[i] == '\n' || (*str)[i] == '\r') {
// Replace Newline
(*str)[i] = ' ';
}
2022-03-14 23:09:25 +00:00
}
2022-07-20 06:58:14 +00:00
}
}
// Minecraft-Flavored CP437
void safe_iconv(iconv_t cd, char *input, size_t input_size, char *output, size_t output_size) {
iconv(cd, &input, &input_size, &output, &output_size);
}
#define CP437_CHARACTERS 256
static const char *cp437_characters_map[CP437_CHARACTERS] = {
"\0", "", "", "", "", "", "", "", "", "", "\n", "", "", "\r", "", "",
"", "", "", "", "", "§", "", "", "", "", "", "", "", "", "", "",
" ", "!", "\"", "#", "$", "%", "&", "'", "(", ")", "*", "+", ",", "-", ".", "/",
"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", "{", "|", "}", "~", "",
"Ç", "ü", "é", "â", "ä", "à", "å", "ç", "ê", "ë", "è", "ï", "î", "ì", "Ä", "Å",
"É", "æ", "Æ", "ô", "ö", "ò", "û", "ù", "ÿ", "Ö", "Ü", "¢", "£", "¥", "", "ƒ",
"á", "í", "ó", "ú", "ñ", "Ñ", "ª", "º", "¿", "", "¬", "½", "¼", "¡", "«", "»",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
"α", "ß", "Γ", "π", "Σ", "σ", "µ", "τ", "Φ", "Θ", "Ω", "δ", "", "φ", "ε", "",
"", "±", "", "", "", "", "÷", "", "°", "", "·", "", "", "²", "", "©"
};
static uint32_t *get_cp437_characters_codepoint_map() {
static uint32_t map[CP437_CHARACTERS];
static int is_setup = 0;
if (!is_setup) {
// Build Map
iconv_t cd = iconv_open("UTF-32LE", "UTF-8");
if (cd != (iconv_t) -1) {
size_t str_size = 4;
uint32_t *str = (uint32_t *) malloc(str_size);
ALLOC_CHECK(str);
for (int i = 0; i < CP437_CHARACTERS; i++) {
// Convert to UTF-32, Then Extract Codepoint
safe_iconv(cd, (char *) cp437_characters_map[i], strlen(cp437_characters_map[i]), (char *) str, str_size);
// Extract
map[i] = str[0];
}
// Free
free(str);
iconv_close(cd);
} else {
IMPOSSIBLE();
2022-03-14 23:09:25 +00:00
}
2022-07-20 06:58:14 +00:00
is_setup = 1;
}
return map;
}
char *to_cp437(const char *input) {
// Convert To UTF-32 For Easier Parsing
size_t in_size = strlen(input);
size_t utf32_str_size = in_size * 4;
size_t real_utf32_str_size = utf32_str_size + 4 /* NULL-terminator */;
uint32_t *utf32_str = (uint32_t *) malloc(real_utf32_str_size);
ALLOC_CHECK(utf32_str);
memset(utf32_str, 0, real_utf32_str_size);
iconv_t cd = iconv_open("UTF-32LE", "UTF-8");
if (cd != (iconv_t) -1) {
safe_iconv(cd, (char *) input, in_size, (char *) utf32_str, utf32_str_size);
iconv_close(cd);
} else {
IMPOSSIBLE();
}
// Allocate String
size_t cp437_str_size;
for (cp437_str_size = 0; utf32_str[cp437_str_size] != 0; cp437_str_size++);
size_t real_cp437_str_size = cp437_str_size + 1 /* NULL-terminator */;
char *cp437_str = (char *) malloc(real_cp437_str_size);
ALLOC_CHECK(cp437_str);
memset(cp437_str, 0, real_cp437_str_size);
// Handle Characters
for (size_t i = 0; utf32_str[i] != 0; i++) {
uint32_t codepoint = utf32_str[i];
for (int j = 0; j < CP437_CHARACTERS; j++) {
uint32_t test_codepoint = get_cp437_characters_codepoint_map()[j];
if (codepoint == test_codepoint) {
cp437_str[i] = j;
break;
}
}
if (cp437_str[i] == '\0') {
cp437_str[i] = '?';
}
}
// Free
free(utf32_str);
// Return
return cp437_str;
}
char *from_cp437(const char *input) {
// Convert To UTF-32 For Easier Parsing
size_t in_size = strlen(input);
size_t utf32_str_size = in_size * 4;
size_t real_utf32_str_size = utf32_str_size + 4 /* NULL-terminator */;
uint32_t *utf32_str = (uint32_t *) malloc(real_utf32_str_size);
ALLOC_CHECK(utf32_str);
memset(utf32_str, 0, real_utf32_str_size);
// Handle Characters
for (size_t i = 0; input[i] != '\0'; i++) {
utf32_str[i] = get_cp437_characters_codepoint_map()[(uint32_t) input[i]];
}
// Convert To UTF-8
size_t out_size = utf32_str_size;
size_t real_out_size = utf32_str_size + 1 /* NULL-terminator */;
char *output = (char *) malloc(real_out_size);
ALLOC_CHECK(output);
memset(output, 0, real_out_size);
iconv_t cd = iconv_open("UTF-8", "UTF-32LE");
if (cd != (iconv_t) -1) {
safe_iconv(cd, (char *) utf32_str, utf32_str_size, output, out_size);
iconv_close(cd);
} else {
IMPOSSIBLE();
2022-03-14 23:09:25 +00:00
}
2022-07-20 06:58:14 +00:00
// Return
return output;
2022-03-14 23:09:25 +00:00
}
2022-03-25 02:47:34 +00:00
// Starts With
int starts_with(const char *str, const char *prefix) {
return strncmp(prefix, str, strlen(prefix)) == 0;
}