Nils O. Selåsdal
123 lines
4.2 KiB
C
123 lines
4.2 KiB
C
#ifndef UC_STRING_H_
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#define UC_STRING_H_
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#include <stddef.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** Encode to ascii-hex, upper case letters.
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*
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* Subtract the return value from the passed in @out to find
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* the length of the converted data
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*
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* @param in data to encode
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* @param len length of data
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* @param out where to store result. Must hold at least len * 2 + 1
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* @return returns one past the end of the converted data
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*/
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char* uc_hex_encode(const uint8_t *in, size_t len, char *out);
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/** Decode hex. Will stop at the first non-convertible hex-digit
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* spaces(' ','\t,'\r','\n') in input are skipped
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* Subtract the return value from the passed in @out to find
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* the length of the converted data
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*
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* @param in data to encode
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* @param maxlen max length of @in to convert,
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* conversion stops when either maxlen is reached,
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* nul terminator of in is found or a non hex digit is found.
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* @param out where to store result. Must hold at least maxlen/2 + 1
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* @return returns one past the end of the converted data
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*/
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uint8_t* uc_hex_decode(const char *in, size_t maxlen,uint8_t *out);
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/** As uc_hex_encode , but inserts the @delim string between each converted
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* byte (each 2 hex chars)
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*/
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char* uc_hex_encode_delim(const uint8_t *in, size_t inlen, char *out, int outlen, const char *delim);
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/**
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* Convert the string to lowercase, calls tolower() on each char.
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* @param s string to lowercase
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*/
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void uc_str_tolower(char *s);
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/**
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* Convert the string to uppercase, calls toupper() on each char.
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* @param s string to uppercase
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*/
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void uc_str_toupper(char *s);
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/** Macro to calculate the number of bytes required to BCD encode
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* the number of ascii digits
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*/
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#define UC_BCD_LEN(ascii_len) ((ascii_len) / 2 + ((ascii_len) % 2))
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/** Macro to calculate the number of bytes required to ASCII encode
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* the number of BCD digits
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*/
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#define UC_ASCII_LEN(bcd_len) ((bcd_len) * 2)
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/** Convert the ascii digits to BCD. Digits not in 0..9 are skipped.
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*
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* @param ascii string to BCD encode.
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* @param bcdout resulting BCD data. Must be at least UC_BCD_LEN(strlen(asciii)) big
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* @param filler filler byte(not the ascii digit) to write in the last BCD nibble
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* if the number of ASCII digits is odd. This would usually be 0x0 or 0xf.
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* @return the number of bytes written to bcdout
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*/
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size_t uc_ascii2bcd(const char *ascii, unsigned char *bcdout, unsigned char filler);
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/** Convert the BCD digits to ascii.
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* The resulting ascii string is 0 terminated.
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*
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* @param bcd Buffer with BCD data to convert to ascii
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* @param bcdlen number of bytes in @bcd to convert
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* @param asciiout buffer to place ASCII in, must be UC_ASCII_LEN(bcdlen)+1 big
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* @return the number of characters written to bcdout (this will always be UC_ASCII_LEN(bcdlen)
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*/
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size_t uc_bcd2ascii(const unsigned char *bcd, size_t bcdlen, char *asciiout);
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/** uc_sprintb for converting the values into ascii bit representation
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* e.g. 0x3 -> "00000011". The result must be able to hold the max number
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* of bits of the type + 1. Returns 'result'
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*/
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char* uc_sprintb(char *result, unsigned int value);
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char* uc_sprintbc(char *result, unsigned char value);
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char* uc_sprintbll(char *result, unsigned long long value);
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char* uc_sprintbs(char *result, unsigned short value);
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/** Like http://swtch.com/plan9port/man/man3/getfields.html
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*/
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int getfields(char *str, char **args, int max, int mflag, const char *set);
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//Converts bytes to a human representable test, (i.e. 12kB, 160 MB 1.78 GB etc.)
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///result should be at least of size 12,
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///returns the result argument
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char * uc_human_bytesz_dec(uint64_t bytes, char *result, size_t result_len);
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//same as uc_human_bytesz_bin, but Conversion is done in binary
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//(base 2 ,1 KiB == 1024 bytes)
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char * uc_human_bytesz_bin(uint64_t bytes, char *result, size_t result_len);
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/** Copy a C string ensuring dst is nul terminated.
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* If @max is 0, no action is done
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* src must be a nul terminated string
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*
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* @param dst destination buffer
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* @param src source string
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* @maram max max chars (including nul terminator to copy). This should
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* is normally the size of the dst buffer)
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* return strlen(src) which may be larger than the no. of bytes copied.
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*/
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size_t uc_strlcpy(char *dst, const char *src, size_t max);
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#ifdef __cplusplus
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}
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#endif
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#endif
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