mirror of
https://github.com/radio95-rnt/rds95.git
synced 2026-02-26 20:33:53 +01:00
303 lines
13 KiB
C
303 lines
13 KiB
C
#include "common.h"
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#include "rds.h"
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#include <time.h>
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#include "lib.h"
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extern int nanosleep(const struct timespec *req, struct timespec *rem);
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void msleep(unsigned long ms) {
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struct timespec ts;
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ts.tv_sec = ms / 1000ul;
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ts.tv_nsec = (ms % 1000ul) * 1000;
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nanosleep(&ts, NULL);
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}
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int _strnlen(const char *s, int maxlen) {
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int len = 0;
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while (s[len] != 0 && len < maxlen) len++;
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return len;
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}
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// For RDS2 RFT, file error checking, and UECP
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uint16_t crc16_ccitt(char* data, uint16_t len) {
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uint16_t i, crc=0xFFFF;
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for (i=0; i < len; i++ ) {
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crc = (unsigned char)(crc >> 8) | (crc << 8);
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crc ^= data[i];
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crc ^= (unsigned char)(crc & 0xff) >> 4;
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crc ^= (crc << 8) << 4;
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crc ^= ((crc & 0xff) << 4) << 1;
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}
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return ((crc ^= 0xFFFF) & 0xFFFF);
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}
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uint16_t get_block_grom_group(RDSGroup *group, uint8_t block) {
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switch (block) {
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case 0:
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return group->a;
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case 1:
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return group->b;
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case 2:
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return group->c;
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case 3:
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return group->d;
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default:
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return 0;
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}
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}
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static uint16_t offset_words[] = {
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0x0FC, /* A */
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0x198, /* B */
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0x168, /* C */
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0x1B4, /* D */
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0x350 /* C' */
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};
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void add_checkwords(RDSGroup *group, uint8_t *bits)
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{
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uint16_t offset_word;
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for (uint8_t i = 0; i < GROUP_LENGTH; i++) {
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offset_word = offset_words[i];
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if (i == 2 && group->is_type_b) {
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offset_word = offset_words[4];
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}
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uint16_t block = get_block_grom_group(group, i);
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uint16_t block_crc = 0;
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uint8_t j, bit, msb;
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for (j = 0; j < BLOCK_SIZE; j++) {
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bit = (block & (0x8000 >> j)) != 0;
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msb = (block_crc >> (POLY_DEG - 1)) & 1;
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block_crc <<= 1;
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if (msb ^ bit) block_crc ^= POLY;
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*bits++ = bit;
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}
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uint16_t check = block_crc ^ offset_word;
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for (j = 0; j < POLY_DEG; j++) {
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*bits++ = (check & ((1 << (POLY_DEG - 1)) >> j)) != 0;
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}
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}
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}
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uint8_t add_rds_af(RDSAFs *af_list, float freq) {
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uint16_t af;
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uint8_t entries_reqd = 1;
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if (freq < 87.6f || freq > 107.9f) entries_reqd = 2;
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if (af_list->num_afs + entries_reqd > MAX_AFS) return 1;
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if (freq >= 87.6f && freq <= 107.9f) {
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af = (uint16_t)(freq * 10.0f) - 875;
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af_list->afs[af_list->num_entries] = af;
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af_list->num_entries += 1;
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} else if (freq >= 153.0f && freq <= 279.0f) {
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af = (uint16_t)(freq - 153.0f) / 9 + 1;
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af_list->afs[af_list->num_entries + 0] = AF_CODE_LFMF_FOLLOWS;
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af_list->afs[af_list->num_entries + 1] = af;
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af_list->num_entries += 2;
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} else if (freq >= 531.0f && freq <= 1602.0f) {
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af = (uint16_t)(freq - 531.0f) / 9 + 16;
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af_list->afs[af_list->num_entries + 0] = AF_CODE_LFMF_FOLLOWS;
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af_list->afs[af_list->num_entries + 1] = af;
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af_list->num_entries += 2;
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} else {
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return 1;
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}
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af_list->num_afs++;
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return 0;
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}
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char *convert_to_rds_charset(char *str) {
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static char new_str[255];
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uint8_t i = 0;
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while (*str != 0 && i < 255) {
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switch (*str) {
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case 0xc2:
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str++;
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switch (*str) {
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case 0xa1: new_str[i] = 0x8e; break; /* INVERTED EXCLAMATION MARK */
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case 0xa3: new_str[i] = 0xaa; break; /* POUND SIGN */
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case 0xa7: new_str[i] = 0xbf; break; /* SECTION SIGN */
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case 0xa9: new_str[i] = 0xa2; break; /* COPYRIGHT SIGN */
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case 0xaa: new_str[i] = 0xa0; break; /* FEMININE ORDINAL INDICATOR */
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case 0xb0: new_str[i] = 0xbb; break; /* DEGREE SIGN */
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case 0xb1: new_str[i] = 0xb4; break; /* PLUS-MINUS SIGN */
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case 0xb2: new_str[i] = 0xb2; break; /* SUPERSCRIPT TWO */
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case 0xb3: new_str[i] = 0xb3; break; /* SUPERSCRIPT THREE */
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case 0xb5: new_str[i] = 0xb8; break; /* MIKRO SIGN */
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case 0xb9: new_str[i] = 0xb1; break; /* SUPERSCRIPT ONE */
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case 0xba: new_str[i] = 0xb0; break; /* MASCULINE ORDINAL INDICATOR */
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case 0xbc: new_str[i] = 0xbc; break; /* VULGAR FRACTION ONE QUARTER */
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case 0xbd: new_str[i] = 0xbd; break; /* VULGAR FRACTION ONE HALF */
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case 0xbe: new_str[i] = 0xbe; break; /* VULGAR FRACTION THREE QUARTERS */
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case 0xbf: new_str[i] = 0xb9; break; /* INVERTED QUESTION MARK */
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default: new_str[i] = ' '; break;
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}
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break;
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case 0xc3:
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str++;
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switch (*str) {
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case 0x80: new_str[i] = 0xc1; break; /* LATIN CAPITAL LETTER A WITH GRAVE */
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case 0x81: new_str[i] = 0xc0; break; /* LATIN CAPITAL LETTER A WITH ACUTE */
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case 0x82: new_str[i] = 0xd0; break; /* LATIN CAPITAL LETTER A WITH CIRCUMFLEX */
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case 0x83: new_str[i] = 0xe0; break; /* LATIN CAPITAL LETTER A WITH TILDE */
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case 0x84: new_str[i] = 0xd1; break; /* LATIN CAPITAL LETTER A WITH DIAERESIS */
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case 0x85: new_str[i] = 0xe1; break; /* LATIN CAPITAL LETTER A WITH RING ABOVE */
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case 0x86: new_str[i] = 0xe2; break; /* LATIN CAPITAL LETTER AE */
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case 0x87: new_str[i] = 0x8b; break; /* LATIN CAPITAL LETTER C WITH CEDILLA */
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case 0x88: new_str[i] = 0xc3; break; /* LATIN CAPITAL LETTER E WITH GRAVE */
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case 0x89: new_str[i] = 0xc2; break; /* LATIN CAPITAL LETTER E WITH ACUTE */
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case 0x8a: new_str[i] = 0xd2; break; /* LATIN CAPITAL LETTER E WITH CIRCUMFLEX */
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case 0x8b: new_str[i] = 0xd3; break; /* LATIN CAPITAL LETTER E WITH DIAERESIS */
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case 0x8c: new_str[i] = 0xc5; break; /* LATIN CAPITAL LETTER I WITH GRAVE */
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case 0x8d: new_str[i] = 0xc4; break; /* LATIN CAPITAL LETTER I WITH ACUTE */
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case 0x8e: new_str[i] = 0xd4; break; /* LATIN CAPITAL LETTER I WITH CIRCUMFLEX */
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case 0x8f: new_str[i] = 0xd5; break; /* LATIN CAPITAL LETTER I WITH DIAERESIS */
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case 0x90: new_str[i] = 0xce; break; /* LATIN CAPITAL LETTER ETH */
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case 0x91: new_str[i] = 0x8a; break; /* LATIN CAPITAL LETTER N WITH TILDE */
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case 0x92: new_str[i] = 0xc7; break; /* LATIN CAPITAL LETTER O WITH GRAVE */
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case 0x93: new_str[i] = 0xc6; break; /* LATIN CAPITAL LETTER O WITH ACUTE */
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case 0x94: new_str[i] = 0xd6; break; /* LATIN CAPITAL LETTER O WITH CIRCUMFLEX */
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case 0x95: new_str[i] = 0xe6; break; /* LATIN CAPITAL LETTER O WITH TILDE */
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case 0x96: new_str[i] = 0xd7; break; /* LATIN CAPITAL LETTER O WITH DIAERESIS */
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case 0x98: new_str[i] = 0xe7; break; /* LATIN CAPITAL LETTER O WITH STROKE */
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case 0x99: new_str[i] = 0xc9; break; /* LATIN CAPITAL LETTER U WITH GRAVE */
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case 0x9a: new_str[i] = 0xc8; break; /* LATIN CAPITAL LETTER U WITH ACUTE */
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case 0x9b: new_str[i] = 0xd8; break; /* LATIN CAPITAL LETTER U WITH CIRCUMFLEX */
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case 0x9c: new_str[i] = 0xd9; break; /* LATIN CAPITAL LETTER U WITH DIAERESIS */
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case 0x9d: new_str[i] = 0xe5; break; /* LATIN CAPITAL LETTER Y WITH ACUTE */
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case 0x9e: new_str[i] = 0xe8; break; /* LATIN CAPITAL LETTER THORN */
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case 0xa0: new_str[i] = 0x81; break; /* LATIN SMALL LETTER A WITH GRAVE */
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case 0xa1: new_str[i] = 0x80; break; /* LATIN SMALL LETTER A WITH ACUTE */
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case 0xa2: new_str[i] = 0x90; break; /* LATIN SMALL LETTER A WITH CIRCUMFLEX */
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case 0xa3: new_str[i] = 0xf0; break; /* LATIN SMALL LETTER A WITH TILDE */
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case 0xa4: new_str[i] = 0x91; break; /* LATIN SMALL LETTER A WITH DIAERESIS */
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case 0xa5: new_str[i] = 0xf1; break; /* LATIN SMALL LETTER A WITH RING ABOVE */
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case 0xa6: new_str[i] = 0xf2; break; /* LATIN SMALL LETTER AE */
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case 0xa7: new_str[i] = 0x9b; break; /* LATIN SMALL LETTER C WITH CEDILLA */
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case 0xa8: new_str[i] = 0x83; break; /* LATIN SMALL LETTER E WITH GRAVE */
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case 0xa9: new_str[i] = 0x82; break; /* LATIN SMALL LETTER E WITH ACUTE */
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case 0xaa: new_str[i] = 0x92; break; /* LATIN SMALL LETTER E WITH CIRCUMFLEX */
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case 0xab: new_str[i] = 0x93; break; /* LATIN SMALL LETTER E WITH DIAERESIS */
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case 0xac: new_str[i] = 0x85; break; /* LATIN SMALL LETTER I WITH GRAVE */
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case 0xad: new_str[i] = 0x84; break; /* LATIN SMALL LETTER I WITH ACUTE */
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case 0xae: new_str[i] = 0x94; break; /* LATIN SMALL LETTER I WITH CIRCUMFLEX */
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case 0xaf: new_str[i] = 0x95; break; /* LATIN SMALL LETTER I WITH DIAERESIS */
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case 0xb0: new_str[i] = 0xef; break; /* LATIN SMALL LETTER ETH */
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case 0xb1: new_str[i] = 0x9a; break; /* LATIN SMALL LETTER N WITH TILDE */
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case 0xb2: new_str[i] = 0x87; break; /* LATIN SMALL LETTER O WITH GRAVE */
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case 0xb3: new_str[i] = 0x86; break; /* LATIN SMALL LETTER O WITH ACUTE */
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case 0xb4: new_str[i] = 0x96; break; /* LATIN SMALL LETTER O WITH CIRCUMFLEX */
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case 0xb5: new_str[i] = 0xf6; break; /* LATIN SMALL LETTER O WITH TILDE */
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case 0xb6: new_str[i] = 0x97; break; /* LATIN SMALL LETTER O WITH DIAERESIS */
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case 0xb7: new_str[i] = 0xba; break; /* DIVISION SIGN */
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case 0xb8: new_str[i] = 0xf7; break; /* LATIN SMALL LETTER O WITH STROKE */
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case 0xb9: new_str[i] = 0x89; break; /* LATIN SMALL LETTER U WITH GRAVE */
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case 0xba: new_str[i] = 0x88; break; /* LATIN SMALL LETTER U WITH ACUTE */
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case 0xbb: new_str[i] = 0x98; break; /* LATIN SMALL LETTER U WITH CIRCUMFLEX */
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case 0xbc: new_str[i] = 0x99; break; /* LATIN SMALL LETTER U WITH DIAERESIS */
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case 0xbd: new_str[i] = 0xf5; break; /* LATIN SMALL LETTER Y WITH ACUTE */
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case 0xbe: new_str[i] = 0xf8; break; /* LATIN SMALL LETTER THORN */
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default: new_str[i] = ' '; break;
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}
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break;
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case 0xc4:
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str++;
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switch (*str) {
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case 0x87: new_str[i] = 0xfb; break; /* LATIN SMALL LETTER C WITH ACUTE */
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case 0x8c: new_str[i] = 0xcb; break; /* LATIN CAPITAL LETTER C WITH CARON */
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case 0x8d: new_str[i] = 0xdb; break; /* LATIN SMALL LETTER C WITH CARON */
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case 0x91: new_str[i] = 0xde; break; /* LATIN SMALL LETTER D WITH STROKE */
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case 0x9b: new_str[i] = 0xa5; break; /* LATIN SMALL LETTER E WITH CARON */
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case 0xb0: new_str[i] = 0xb5; break; /* LATIN CAPITAL LETTER I WITH DOT ABOVE */
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case 0xb1: new_str[i] = 0x9f; break; /* LATIN SMALL LETTER DOTLESS I */
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case 0xb2: new_str[i] = 0x8f; break; /* LATIN CAPITAL LIGATURE IJ */
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case 0xb3: new_str[i] = 0x9f; break; /* LATIN SMALL LIGATURE IJ */
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case 0xbf: new_str[i] = 0xcf; break; /* LATIN CAPITAL LETTER L WITH MIDDLE DOT */
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default: new_str[i] = ' '; break;
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}
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break;
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case 0xc5:
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str++;
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switch (*str) {
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case 0x80: new_str[i] = 0xdf; break; /* LATIN SMALL LETTER L WITH MIDDLE DOT */
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case 0x84: new_str[i] = 0xb6; break; /* LATIN SMALL LETTER N WITH ACUTE */
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case 0x88: new_str[i] = 0xa6; break; /* LATIN SMALL LETTER N WITH CARON */
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case 0x8a: new_str[i] = 0xe9; break; /* LATIN CAPITAL LETTER ENG */
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case 0x8b: new_str[i] = 0xf9; break; /* LATIN SMALL LETTER ENG */
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case 0x91: new_str[i] = 0xa7; break; /* LATIN SMALL LETTER O WITH DOUBLE ACUTE */
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case 0x92: new_str[i] = 0xe3; break; /* LATIN CAPITAL LIGATURE OE */
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case 0x93: new_str[i] = 0xf3; break; /* LATIN SMALL LIGATURE OE */
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case 0x94: new_str[i] = 0xea; break; /* LATIN CAPITAL LETTER R WITH ACUTE */
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case 0x95: new_str[i] = 0xfa; break; /* LATIN SMALL LETTER R WITH ACUTE */
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case 0x98: new_str[i] = 0xca; break; /* LATIN CAPITAL LETTER R WITH CARON */
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case 0x99: new_str[i] = 0xda; break; /* LATIN SMALL LETTER R WITH CARON */
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case 0x9a: new_str[i] = 0xec; break; /* LATIN CAPITAL LETTER S WITH ACUTE */
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case 0x9b: new_str[i] = 0xfc; break; /* LATIN SMALL LETTER S WITH ACUTE */
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case 0x9e: new_str[i] = 0x8c; break; /* LATIN CAPITAL LETTER S WITH CEDILLA */
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case 0x9f: new_str[i] = 0x9c; break; /* LATIN SMALL LETTER S WITH CEDILLA */
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case 0xa0: new_str[i] = 0xcc; break; /* LATIN CAPITAL LETTER S WITH CARON */
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case 0xa1: new_str[i] = 0xdc; break; /* LATIN SMALL LETTER S WITH CARON */
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case 0xa6: new_str[i] = 0xee; break; /* LATIN CAPITAL LETTER T WITH STROKE */
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case 0xa7: new_str[i] = 0xfe; break; /* LATIN SMALL LETTER T WITH STROKE */
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case 0xb1: new_str[i] = 0xb7; break; /* LATIN SMALL LETTER U WITH DOUBLE ACUTE */
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case 0xb5: new_str[i] = 0xf4; break; /* LATIN SMALL LETTER W WITH CIRCUMFLEX */
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case 0xb7: new_str[i] = 0xe4; break; /* LATIN SMALL LETTER Y WITH CIRCUMFLEX */
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case 0xb9: new_str[i] = 0xed; break; /* LATIN CAPITAL LETTER Z WITH ACUTE */
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case 0xba: new_str[i] = 0xfd; break; /* LATIN SMALL LETTER Z WITH ACUTE */
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case 0xbd: new_str[i] = 0xcd; break; /* LATIN CAPITAL LETTER Z WITH CARON */
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case 0xbe: new_str[i] = 0xdd; break; /* LATIN SMALL LETTER Z WITH CARON */
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default: new_str[i] = ' '; break;
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}
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break;
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case 0xc7:
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str++;
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switch (*str) {
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case 0xa6: new_str[i] = 0xa4; break; /* LATIN CAPITAL LETTER G WITH CARON */
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case 0xa7: new_str[i] = 0x9d; break; /* LATIN SMALL LETTER G WITH CARON */
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default: new_str[i] = ' '; break;
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}
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break;
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case 0xce:
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str++;
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switch (*str) {
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case 0xb1: new_str[i] = 0xa1; break; /* GREEK SMALL LETTER ALPHA */
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case 0xb2: new_str[i] = 0x8d; break; /* GREEK SMALL LETTER BETA */
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default: new_str[i] = ' '; break;
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}
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break;
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case 0xcf:
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str++;
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switch (*str) {
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case 0x80: new_str[i] = 0xa8; break; /* GREEK SMALL LETTER PI */
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default: new_str[i] = ' '; break;
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}
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break;
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default: /* 0-127 or unknown */
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switch (*str) {
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case '$': new_str[i] = 0xab; break; /* DOLLAR SIGN */
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default: new_str[i] = *str; break;
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}
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break;
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}
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i++;
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str++;
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}
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new_str[i] = 0;
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return new_str;
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} |