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Added some string interpretation functions

release/0.19
JustinAJ 11 years ago
parent
e410038a42
commit
d22af4ce7d
2 changed files with 262 additions and 0 deletions
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  1. 183
      Jupiter/Functions.c
  2. 79
      Jupiter/Functions.h

183
Jupiter/Functions.c
View File

@ -549,3 +549,186 @@ char *getTime()
strftime(rtime, sizeof(rtime), "%a %b %d %H:%M:%S %Y %Z", localtime(&rawtime));
return rtime;
}
/** Character to integer conversion table */
const unsigned char baseTable[] =
{
127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 127, 127, 127, 127, 127, 127,
127, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 127, 127, 127, 127, 127,
127, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 127, 127, 127, 127, 127,
127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
};
/** Single character functions */
bool isBase(unsigned char c, int base)
{
return baseTable[c] < base;
}
bool isHex(unsigned char c)
{
return isBase(c, 16);
}
bool isDecimal(unsigned char c)
{
return isBase(c, 10);
}
int getBase(unsigned char c, int base)
{
c = baseTable[c];
if (c < base) return c;
return -1;
}
/** Unsafe string converters */
int strtoi(const char *str, int base)
{
while (isspace(*str)) str++;
return strtoi_nospace(str, base);
}
unsigned int strtoui(const char *str, int base)
{
while (isspace(*str)) str++;
return strtoi_nospace(str, base);
}
int strtoi_nospace(const char *str, int base)
{
if (*str != '-') return strtoui_nospace(str, base);
return -1 * strtoui_nospace(++str, base);
}
unsigned int strtoui_nospace(const char *str, int base)
{
unsigned int total = 0;
int tval;
if (*str == '-') return strtoi_nospace(str, base);
if (*str == '+') str++;
if (base == 0) // Guess a base.
{
if (*str == '0')
{
str++;
if (*str == 'x' || *str == 'X')
{
str++;
base = 16;
}
else base = 8;
}
else base = 10;
}
else if (base == 16) // check for optional preceeding hexadecimal prefix.
{
if (*str == '0')
{
str++;
if (*str == 'x' || *str == 'X') str++;
}
}
while ((tval = getBase(*str, base)) != -1)
{
total = base * total + tval;
str++;
}
return total;
}
/** Safe string converters */
int strtoi_s(const char *str, size_t length, int base)
{
while (isspace(*str))
{
str++;
length--;
}
return strtoi_nospace_s(str, length, base);
}
unsigned int strtoui_s(const char *str, size_t length, int base)
{
while (isspace(*str))
{
str++;
length--;
}
return strtoui_nospace_s(str, length, base);
}
signed int strtoi_nospace_s(const char *str, size_t length, int base)
{
if (length == 0) return 0;
if (*str != '-') return strtoui_nospace_s(str, length, base);
return -1 * strtoui_nospace_s(++str, --length, base);
}
unsigned int strtoui_nospace_s(const char *str, size_t length, int base)
{
unsigned int total = 0;
int tval;
if (length == 0) return total;
if (*str == '-') return strtoi_nospace(str, base);
if (*str == '+')
{
if (--length == 0) return total;
str++;
}
if (base == 0) // Guess a base.
{
if (*str == '0')
{
if (--length == 0) return total;
str++;
if (*str == 'x' || *str == 'X')
{
if (--length == 0) return total;
str++;
base = 16;
}
else base = 8;
}
else base = 10;
}
else if (base == 16) // check for optional preceeding hexadecimal prefix.
{
if (*str == '0')
{
if (--length == 0) return total;
str++;
if (*str == 'x' || *str == 'X')
{
if (--length == 0) return total;
str++;
}
}
}
while ((tval = getBase(*str, base)) != -1)
{
total = base * total + tval;
if (--length == 0) return total;
str++;
}
return total;
}

79
Jupiter/Functions.h
View File

@ -312,6 +312,85 @@ JUPITER_API uint32_t getPowerTwo32(uint32_t number);
*/
JUPITER_API uint64_t getPowerTwo64(uint64_t number);
/**
* @brief Checks if a character is a digit character of a specified radix.
* Note: The maximum base is 36 (0-9 and a-z)
*
* @param c Character to check.
* @return True if the character is a hexadecimal digit, false otherwise.
*/
JUPITER_API bool isBase(unsigned char c, int base);
/**
* @brief Checks if a character is a hexadecimal digit character. (base 16)
*
* @param c Character to check.
* @return True if the character is a hexadecimal digit, false otherwise.
*/
JUPITER_API bool isHex(unsigned char c);
/**
* @brief Checks if a character is a decimal digit character. (base 10)
*
* @param c Character to check.
* @return True if the character is a decimal digit, false otherwise.
*/
JUPITER_API bool isDecimal(unsigned char c);
/**
* @brief Fetches a character's represented integral value.
* Note: The maximum base is 36 (0-9 and a-z)
*
* @param c Character to fetch value of.
* @param base Base of the representation.
* @return A character's represented integral value on success, -1 otherwise.
*/
JUPITER_API int getBase(unsigned char c, int base);
/**
* @brief Interprets a string into an integer.
*
* @param str String to interpret.
* @param base Base of the string to interpret. 0 is acceptable.
* @return Interpretation of the string as an integer on success, 0 otherwise.
*/
JUPITER_API int strtoi(const char *str, int base);
JUPITER_API unsigned int strtoui(const char *str, int base);
/**
* @brief Interprets a string into an integer.
* Note: This function assumes no preceeding space characters exist.
*
* @param str String to interpret.
* @param base Base of the string to interpret. 0 is acceptable.
* @return Interpretation of the string as an integer on success, 0 otherwise.
*/
JUPITER_API int strtoi_nospace(const char *str, int base);
JUPITER_API unsigned int strtoui_nospace(const char *str, int base);
/**
* @brief Interprets a string into an integer.
*
* @param str String to interpret.
* @param length Length of str.
* @param base Base of the string to interpret. 0 is acceptable.
* @return Interpretation of the string as an integer on success, 0 otherwise.
*/
JUPITER_API int strtoi_s(const char *str, size_t length, int base);
JUPITER_API unsigned int strtoui_s(const char *str, size_t length, int base);
/**
* @brief Interprets a string into an integer.
* Note: This function assumes no preceeding space characters exist.
*
* @param str String to interpret.
* @param length Length of str.
* @param base Base of the string to interpret. 0 is acceptable.
* @return Interpretation of the string as an integer on success, 0 otherwise.
*/
JUPITER_API int strtoi_nospace_s(const char *str, size_t length, int base);
JUPITER_API unsigned int strtoui_nospace_s(const char *str, size_t length, int base);
#if defined __cplusplus
}

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