#include "lib.h"

extern int nanosleep(const struct timespec *req, struct timespec *rem);
void msleep(unsigned long ms) {
	struct timespec ts;
	ts.tv_sec = ms / 1000ul;
	ts.tv_nsec = (ms % 1000ul) * 1000;
	nanosleep(&ts, NULL);
}

inline int _strnlen(const char *s, int maxlen) {
	int len = 0;
	while (s[len] != 0 && len < maxlen) len++;
	return len;
}
inline int _strncpy(char *dest, const char *src, int n) {
	int i = 0;
	while (i < n && src[i] != '\0') {
		dest[i] = src[i];
		i++;
	}
	while (i < n) {
		dest[i] = '\0';
		i++;
	}
	return i;
}
uint16_t crc16_ccitt(const char* data, uint16_t len) {
	uint16_t i, crc=0xFFFF;
	for (i=0; i < len; i++ ) {
		crc = (unsigned char)(crc >> 8) | (crc << 8);
		crc ^= data[i];
		crc ^= (unsigned char)(crc & 0xff) >> 4;
		crc ^= (crc << 8) << 4;
		crc ^= ((crc & 0xff) << 4) << 1;
	}
	return ((crc ^= 0xFFFF) & 0xFFFF);
}

inline uint16_t get_block_from_group(RDSGroup *group, uint8_t block) {
	switch (block) {
	case 0: return group->a;
	case 1: return group->b;
	case 2: return group->c;
	case 3: return group->d;
	default: return 0;
	}
}

uint8_t add_rds_af(RDSAFs *af_list, float freq) {
	uint16_t af;

	uint8_t entries_reqd = 1;
	if (freq < 87.6f || freq > 107.9f) entries_reqd = 2;

	if (af_list->num_afs + entries_reqd > MAX_AFS) return 1;

	if (freq >= 87.6f && freq <= 107.9f) {
		af = (uint16_t)(freq * 10.0f) - 875;
		af_list->afs[af_list->num_entries] = af;
	} else if (freq >= 153.0f && freq <= 279.0f) {
		af = (uint16_t)(freq - 153.0f) / 9 + 1;
		af_list->afs[af_list->num_entries + 0] = AF_CODE_LFMF_FOLLOWS;
		af_list->afs[af_list->num_entries + 1] = af;
	} else if (freq >= 531.0f && freq <= 1602.0f) {
		af = (uint16_t)(freq - 531.0f) / 9 + 16;
		af_list->afs[af_list->num_entries + 0] = AF_CODE_LFMF_FOLLOWS;
		af_list->afs[af_list->num_entries + 1] = af;
	} else return 1;

	af_list->num_entries += entries_reqd;
	af_list->num_afs++;

	return 0;
}

char *convert_to_rdscharset(const char *str) {
	static char new_str[255];
	uint8_t i = 0;

	while (*str != 0 && i < 255) {
		switch (*str) {
		case (char)0xc2:
			str++;
			switch (*str) {
			case (char)0xa1: new_str[i] = (char)0x8e; break; /* INVERTED EXCLAMATION MARK */
			case (char)0xa3: new_str[i] = (char)0xaa; break; /* POUND SIGN */
			case (char)0xa7: new_str[i] = (char)0xbf; break; /* SECTION SIGN */
			case (char)0xa9: new_str[i] = (char)0xa2; break; /* COPYRIGHT SIGN */
			case (char)0xaa: new_str[i] = (char)0xa0; break; /* FEMININE ORDINAL INDICATOR */
			case (char)0xb0: new_str[i] = (char)0xbb; break; /* DEGREE SIGN */
			case (char)0xb1: new_str[i] = (char)0xb4; break; /* PLUS-MINUS SIGN */
			case (char)0xb2: new_str[i] = (char)0xb2; break; /* SUPERSCRIPT TWO */
			case (char)0xb3: new_str[i] = (char)0xb3; break; /* SUPERSCRIPT THREE */
			case (char)0xb5: new_str[i] = (char)0xb8; break; /* MIKRO SIGN */
			case (char)0xb9: new_str[i] = (char)0xb1; break; /* SUPERSCRIPT ONE */
			case (char)0xba: new_str[i] = (char)0xb0; break; /* MASCULINE ORDINAL INDICATOR */
			case (char)0xbc: new_str[i] = (char)0xbc; break; /* VULGAR FRACTION ONE QUARTER */
			case (char)0xbd: new_str[i] = (char)0xbd; break; /* VULGAR FRACTION ONE HALF */
			case (char)0xbe: new_str[i] = (char)0xbe; break; /* VULGAR FRACTION THREE QUARTERS */
			case (char)0xbf: new_str[i] = (char)0xb9; break; /* INVERTED QUESTION MARK */
			default: new_str[i] = ' '; break;
			}
			break;

		case (char)0xc3:
			str++;
			switch (*str) {
			case (char)0x80: new_str[i] = (char)0xc1; break; /* LATIN CAPITAL LETTER A WITH GRAVE */
			case (char)0x81: new_str[i] = (char)0xc0; break; /* LATIN CAPITAL LETTER A WITH ACUTE */
			case (char)0x82: new_str[i] = (char)0xd0; break; /* LATIN CAPITAL LETTER A WITH CIRCUMFLEX */
			case (char)0x83: new_str[i] = (char)0xe0; break; /* LATIN CAPITAL LETTER A WITH TILDE */
			case (char)0x84: new_str[i] = (char)0xd1; break; /* LATIN CAPITAL LETTER A WITH DIAERESIS */
			case (char)0x85: new_str[i] = (char)0xe1; break; /* LATIN CAPITAL LETTER A WITH RING ABOVE */
			case (char)0x86: new_str[i] = (char)0xe2; break; /* LATIN CAPITAL LETTER AE */
			case (char)0x87: new_str[i] = (char)0x8b; break; /* LATIN CAPITAL LETTER C WITH CEDILLA */
			case (char)0x88: new_str[i] = (char)0xc3; break; /* LATIN CAPITAL LETTER E WITH GRAVE */
			case (char)0x89: new_str[i] = (char)0xc2; break; /* LATIN CAPITAL LETTER E WITH ACUTE */
			case (char)0x8a: new_str[i] = (char)0xd2; break; /* LATIN CAPITAL LETTER E WITH CIRCUMFLEX */
			case (char)0x8b: new_str[i] = (char)0xd3; break; /* LATIN CAPITAL LETTER E WITH DIAERESIS */
			case (char)0x8c: new_str[i] = (char)0xc5; break; /* LATIN CAPITAL LETTER I WITH GRAVE */
			case (char)0x8d: new_str[i] = (char)0xc4; break; /* LATIN CAPITAL LETTER I WITH ACUTE */
			case (char)0x8e: new_str[i] = (char)0xd4; break; /* LATIN CAPITAL LETTER I WITH CIRCUMFLEX */
			case (char)0x8f: new_str[i] = (char)0xd5; break; /* LATIN CAPITAL LETTER I WITH DIAERESIS */
			case (char)0x90: new_str[i] = (char)0xce; break; /* LATIN CAPITAL LETTER ETH */
			case (char)0x91: new_str[i] = (char)0x8a; break; /* LATIN CAPITAL LETTER N WITH TILDE */
			case (char)0x92: new_str[i] = (char)0xc7; break; /* LATIN CAPITAL LETTER O WITH GRAVE */
			case (char)0x93: new_str[i] = (char)0xc6; break; /* LATIN CAPITAL LETTER O WITH ACUTE */
			case (char)0x94: new_str[i] = (char)0xd6; break; /* LATIN CAPITAL LETTER O WITH CIRCUMFLEX */
			case (char)0x95: new_str[i] = (char)0xe6; break; /* LATIN CAPITAL LETTER O WITH TILDE */
			case (char)0x96: new_str[i] = (char)0xd7; break; /* LATIN CAPITAL LETTER O WITH DIAERESIS */
			case (char)0x98: new_str[i] = (char)0xe7; break; /* LATIN CAPITAL LETTER O WITH STROKE */
			case (char)0x99: new_str[i] = (char)0xc9; break; /* LATIN CAPITAL LETTER U WITH GRAVE */
			case (char)0x9a: new_str[i] = (char)0xc8; break; /* LATIN CAPITAL LETTER U WITH ACUTE */
			case (char)0x9b: new_str[i] = (char)0xd8; break; /* LATIN CAPITAL LETTER U WITH CIRCUMFLEX */
			case (char)0x9c: new_str[i] = (char)0xd9; break; /* LATIN CAPITAL LETTER U WITH DIAERESIS */
			case (char)0x9d: new_str[i] = (char)0xe5; break; /* LATIN CAPITAL LETTER Y WITH ACUTE */
			case (char)0x9e: new_str[i] = (char)0xe8; break; /* LATIN CAPITAL LETTER THORN */
			case (char)0xa0: new_str[i] = (char)0x81; break; /* LATIN SMALL LETTER A WITH GRAVE */
			case (char)0xa1: new_str[i] = (char)0x80; break; /* LATIN SMALL LETTER A WITH ACUTE */
			case (char)0xa2: new_str[i] = (char)0x90; break; /* LATIN SMALL LETTER A WITH CIRCUMFLEX */
			case (char)0xa3: new_str[i] = (char)0xf0; break; /* LATIN SMALL LETTER A WITH TILDE */
			case (char)0xa4: new_str[i] = (char)0x91; break; /* LATIN SMALL LETTER A WITH DIAERESIS */
			case (char)0xa5: new_str[i] = (char)0xf1; break; /* LATIN SMALL LETTER A WITH RING ABOVE */
			case (char)0xa6: new_str[i] = (char)0xf2; break; /* LATIN SMALL LETTER AE */
			case (char)0xa7: new_str[i] = (char)0x9b; break; /* LATIN SMALL LETTER C WITH CEDILLA */
			case (char)0xa8: new_str[i] = (char)0x83; break; /* LATIN SMALL LETTER E WITH GRAVE */
			case (char)0xa9: new_str[i] = (char)0x82; break; /* LATIN SMALL LETTER E WITH ACUTE */
			case (char)0xaa: new_str[i] = (char)0x92; break; /* LATIN SMALL LETTER E WITH CIRCUMFLEX */
			case (char)0xab: new_str[i] = (char)0x93; break; /* LATIN SMALL LETTER E WITH DIAERESIS */
			case (char)0xac: new_str[i] = (char)0x85; break; /* LATIN SMALL LETTER I WITH GRAVE */
			case (char)0xad: new_str[i] = (char)0x84; break; /* LATIN SMALL LETTER I WITH ACUTE */
			case (char)0xae: new_str[i] = (char)0x94; break; /* LATIN SMALL LETTER I WITH CIRCUMFLEX */
			case (char)0xaf: new_str[i] = (char)0x95; break; /* LATIN SMALL LETTER I WITH DIAERESIS */
			case (char)0xb0: new_str[i] = (char)0xef; break; /* LATIN SMALL LETTER ETH */
			case (char)0xb1: new_str[i] = (char)0x9a; break; /* LATIN SMALL LETTER N WITH TILDE */
			case (char)0xb2: new_str[i] = (char)0x87; break; /* LATIN SMALL LETTER O WITH GRAVE */
			case (char)0xb3: new_str[i] = (char)0x86; break; /* LATIN SMALL LETTER O WITH ACUTE */
			case (char)0xb4: new_str[i] = (char)0x96; break; /* LATIN SMALL LETTER O WITH CIRCUMFLEX */
			case (char)0xb5: new_str[i] = (char)0xf6; break; /* LATIN SMALL LETTER O WITH TILDE */
			case (char)0xb6: new_str[i] = (char)0x97; break; /* LATIN SMALL LETTER O WITH DIAERESIS */
			case (char)0xb7: new_str[i] = (char)0xba; break; /* DIVISION SIGN */
			case (char)0xb8: new_str[i] = (char)0xf7; break; /* LATIN SMALL LETTER O WITH STROKE */
			case (char)0xb9: new_str[i] = (char)0x89; break; /* LATIN SMALL LETTER U WITH GRAVE */
			case (char)0xba: new_str[i] = (char)0x88; break; /* LATIN SMALL LETTER U WITH ACUTE */
			case (char)0xbb: new_str[i] = (char)0x98; break; /* LATIN SMALL LETTER U WITH CIRCUMFLEX */
			case (char)0xbc: new_str[i] = (char)0x99; break; /* LATIN SMALL LETTER U WITH DIAERESIS */
			case (char)0xbd: new_str[i] = (char)0xf5; break; /* LATIN SMALL LETTER Y WITH ACUTE */
			case (char)0xbe: new_str[i] = (char)0xf8; break; /* LATIN SMALL LETTER THORN */
			default: new_str[i] = ' '; break;
			}
			break;

		case (char)0xc4:
			str++;
			switch (*str) {
			case (char)0x87: new_str[i] = (char)0xfb; break; /* LATIN SMALL LETTER C WITH ACUTE */
			case (char)0x8c: new_str[i] = (char)0xcb; break; /* LATIN CAPITAL LETTER C WITH CARON */
			case (char)0x8d: new_str[i] = (char)0xdb; break; /* LATIN SMALL LETTER C WITH CARON */
			case (char)0x91: new_str[i] = (char)0xde; break; /* LATIN SMALL LETTER D WITH STROKE */
			case (char)0x9b: new_str[i] = (char)0xa5; break; /* LATIN SMALL LETTER E WITH CARON */
			case (char)0xb0: new_str[i] = (char)0xb5; break; /* LATIN CAPITAL LETTER I WITH DOT ABOVE */
			case (char)0xb1: new_str[i] = (char)0x9f; break; /* LATIN SMALL LETTER DOTLESS I */
			case (char)0xb2: new_str[i] = (char)0x8f; break; /* LATIN CAPITAL LIGATURE IJ */
			case (char)0xb3: new_str[i] = (char)0x9f; break; /* LATIN SMALL LIGATURE IJ */
			case (char)0xbf: new_str[i] = (char)0xcf; break; /* LATIN CAPITAL LETTER L WITH MIDDLE DOT */
			default: new_str[i] = ' '; break;
			}
			break;

		case (char)0xc5:
			str++;
			switch (*str) {
			case (char)0x80: new_str[i] = (char)0xdf; break; /* LATIN SMALL LETTER L WITH MIDDLE DOT */
			case (char)0x84: new_str[i] = (char)0xb6; break; /* LATIN SMALL LETTER N WITH ACUTE */
			case (char)0x88: new_str[i] = (char)0xa6; break; /* LATIN SMALL LETTER N WITH CARON */
			case (char)0x8a: new_str[i] = (char)0xe9; break; /* LATIN CAPITAL LETTER ENG */
			case (char)0x8b: new_str[i] = (char)0xf9; break; /* LATIN SMALL LETTER ENG */
			case (char)0x91: new_str[i] = (char)0xa7; break; /* LATIN SMALL LETTER O WITH DOUBLE ACUTE */
			case (char)0x92: new_str[i] = (char)0xe3; break; /* LATIN CAPITAL LIGATURE OE */
			case (char)0x93: new_str[i] = (char)0xf3; break; /* LATIN SMALL LIGATURE OE */
			case (char)0x94: new_str[i] = (char)0xea; break; /* LATIN CAPITAL LETTER R WITH ACUTE */
			case (char)0x95: new_str[i] = (char)0xfa; break; /* LATIN SMALL LETTER R WITH ACUTE */
			case (char)0x98: new_str[i] = (char)0xca; break; /* LATIN CAPITAL LETTER R WITH CARON */
			case (char)0x99: new_str[i] = (char)0xda; break; /* LATIN SMALL LETTER R WITH CARON */
			case (char)0x9a: new_str[i] = (char)0xec; break; /* LATIN CAPITAL LETTER S WITH ACUTE */
			case (char)0x9b: new_str[i] = (char)0xfc; break; /* LATIN SMALL LETTER S WITH ACUTE */
			case (char)0x9e: new_str[i] = (char)0x8c; break; /* LATIN CAPITAL LETTER S WITH CEDILLA */
			case (char)0x9f: new_str[i] = (char)0x9c; break; /* LATIN SMALL LETTER S WITH CEDILLA */
			case (char)0xa0: new_str[i] = (char)0xcc; break; /* LATIN CAPITAL LETTER S WITH CARON */
			case (char)0xa1: new_str[i] = (char)0xdc; break; /* LATIN SMALL LETTER S WITH CARON */
			case (char)0xa6: new_str[i] = (char)0xee; break; /* LATIN CAPITAL LETTER T WITH STROKE */
			case (char)0xa7: new_str[i] = (char)0xfe; break; /* LATIN SMALL LETTER T WITH STROKE */
			case (char)0xb1: new_str[i] = (char)0xb7; break; /* LATIN SMALL LETTER U WITH DOUBLE ACUTE */
			case (char)0xb5: new_str[i] = (char)0xf4; break; /* LATIN SMALL LETTER W WITH CIRCUMFLEX */
			case (char)0xb7: new_str[i] = (char)0xe4; break; /* LATIN SMALL LETTER Y WITH CIRCUMFLEX */
			case (char)0xb9: new_str[i] = (char)0xed; break; /* LATIN CAPITAL LETTER Z WITH ACUTE */
			case (char)0xba: new_str[i] = (char)0xfd; break; /* LATIN SMALL LETTER Z WITH ACUTE */
			case (char)0xbd: new_str[i] = (char)0xcd; break; /* LATIN CAPITAL LETTER Z WITH CARON */
			case (char)0xbe: new_str[i] = (char)0xdd; break; /* LATIN SMALL LETTER Z WITH CARON */
			default: new_str[i] = ' '; break;
			}
			break;

		case (char)0xc7:
			str++;
			switch (*str) {
			case (char)0xa6: new_str[i] = (char)0xa4; break; /* LATIN CAPITAL LETTER G WITH CARON */
			case (char)0xa7: new_str[i] = (char)0x9d; break; /* LATIN SMALL LETTER G WITH CARON */
			default: new_str[i] = ' '; break;
			}
			break;

		case (char)0xce:
			str++;
			switch (*str) {
			case (char)0xb1: new_str[i] = (char)0xa1; break; /* GREEK SMALL LETTER ALPHA */
			case (char)0xb2: new_str[i] = (char)0x8d; break; /* GREEK SMALL LETTER BETA */
			default: new_str[i] = ' '; break;
			}
			break;

		case (char)0xcf:
			str++;
			switch (*str) {
			case (char)0x80: new_str[i] = (char)0xa8; break; /* GREEK SMALL LETTER PI */
			default: new_str[i] = ' '; break;
			}
			break;

		default: /* 0-127 or unknown */
			switch (*str) {
			case '$': new_str[i] = (char)0xab; break; /* DOLLAR SIGN */
			default: new_str[i] = *str; break;
			}
			break;
		}

		i++;
		str++;
	}

	new_str[i] = 0;
	return new_str;
}