jessica
/
Jupiter
mirror of https://github.com/JAJames/Jupiter.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

Added some string interpretation functions

release/0.19
JustinAJ 10 years ago
parent
e410038a42
commit
d22af4ce7d
2 changed files with 262 additions and 0 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  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
}

Write Preview
Loading…
Cancel
Save