Editing C Runtime Functions - FilterMeisterWiki

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= C Runtime Functions =

Besides the large number of graphics- or GUI-specific functions in FilterMeister, a large number of the standard C runtime functions are available to the developer. Almost all of the functions defined in the C99 standard are provided and even some common extensions are at your disposal.

The most notable omissions are the well-known {{gets}} and {{scanf}}. Since these require some sort of console-based input, which FilterMeister currently does not support, these cannot be implemented.

== File I/O and file manipulation functions ==
((clearerr)) - Clears the error indicator for a stream
((fclose)) - Closes a stream
((fcloseall)) - Closes all open streams
((feof)) - Tests for end of file on a stream
((ferror)) - Tests for error on a stream
((fflush)) - Flushes a stream
((fgetc)) - Reads a character from a stream
((fgetpos)) - Get file position
((fgets)) - Reads a string from a stream
((flushall)) - Flushes all streams
((fopen)) - Opens a stream
((fprintf)) - Writes formatted data to a stream
((fputc)) - Writes a character to a stream
((fputs)) - Writes a string to a stream
((fread)) - Reads unformatted data from a stream
((freopen)) - Reassigns a FILE pointer to a new file
((fscanf)) - Reads formatted data from a stream
((fseek)) - Moves file position to a given location
((fsetpos)) - Sets the position indicator of a stream
((ftell)) - Gets current file position
((fwrite)) - Writes unformatted data to a stream
((getc)) - Reads a character from a stream
((printf)) - Writes formatted data to a message box.
((putc)) - Writes a character to a stream
((remove)) - Deletes a file
((rename)) - Renames a file
((rewind)) - Moves file pointer to beginning of stream
((snprintf)) - Writes formatted data to string up to a specified length
((sprintf)) - Writes formatted data to string
((sscanf)) - Reads formatted data from a string
((tmpfile)) - Creates a temporary file
((tmpnam)) - Creates a temporary file name
((ungetc)) - Removes a character from a stream

== Data conversion functions ==
((abs)) - Absolute value of integer
((strtod)) - Converts string to double
((strtol)) - Converts string to long
((strtoul)) - Converts string to unsigned long

== Memory management functions ==
((calloc)) - Allocate memory block with zero fill
((expand)) - Expands a memory block in place
((free)) - Free memory block
((malloc)) - Allocate memory block
((msize)) - Returns the size of a memory block in bytes. ''(Microsoft-specific function)''
((realloc)) - Re-size memory block
((sizeof)) - Returns the size of an object type in bytes

== Memory manipulation functions ==
((memcpy)) - Copies characters until character or number of characters has been copied
((memchr)) - Return a pointer to the first occurrence, within a specified number of characters
((memcmp)) - Compare a specified number of characters from two memory locations
((memicmp)) - Compare a specified number of characters from two memory locations without regard to case ''(Unix-specific function)''
((memmove)) - Copy a specified number of characters from one memory location to another
((memset)) - Set a region of memory to a specified character

== String manipulation functions ==
((_strerror)) 
((strcat)) - Concatenate two strings
((strchr)) - Find the first occurrence of a given character in a string
((strcmp)) - Compare two strings
((strcoll)) - Compare two strings using the current locale
((strcpy)) - Copy one string to another
((strcspn)) - Find any one of a set of characters in a string
((strdup)) - Duplicate a string
((strerror)) - Return string describing error code
((stricmp)) - Compare two strings without regard to case. ''(Microsoft-specific function)''
((stricoll)) - Compare two strings using the current locale and without regard to case
((strlen)) - Get the length of a string
((strlwr)) - Convert a string to lower case. ''(Microsoft-specific function)''
((strncat)) - Concatenate the specified number of characters from one string to another
((strncmp)) - Compare the specified number of characters in two strings
((strncoll)) - Compare the specified number of characters in two strings using the current locale. ''(Microsoft-specific function)''
((strncpy)) - Copy the specified number of characters from one string to another
((strnicmp)) - Compare the specified number of characters in two strings without regard to case. ''(Microsoft-specific function)''
((strnicoll)) - Compare the specified number of characters in two strings using the current locale and without regard to case. ''(Microsoft-specific function)''
((strnset)) - Set the specified number of characters in a string to a given character
((strpbrk)) - Find the first occurrence of a character from one string in another
((strrchr)) - Find the last occurrence of a character in a string
((strrev)) - Reverse a string
((strset)) - Set all characters in a string to a given character
((strspn)) - Find the first substring from a given character set in a string
((strstr)) - Find the first occurrence of a string in another string
((strtok)) - Find the next token in a string
((strupr)) - Convert a string to upper case. ''(Microsoft-specific function)''
((strxfrm)) - Transforms a string according to the current locale

== Floating-point math ==
((acos)) - Floating point arc cosine(x)
((asin)) - Floating point arc sine(x)
((atan)) - Floating point arc tangent(x)
((atan2)) - Floating point arc tangent(y/x)
((ceil)) - Floating point ceiling(x)
((chop)) - Truncate floating point value towards 0.0.
cos - Implemented as ((fcos)).
((cosh)) - Floating point hyperbolic cosine(x)
((exp)) - Floating point exponent(x)
((fabs)) - Floating point absolute value(x)
((fcos)) - Floating point cosine(x)
((floor)) - Floating point floor(x)
((fmax)) - Find the maximum of two floating point numbers
((fmin)) - Find the minimum of two floating point numbers
((fmod)) - Floating point remainder(x/y)
((fsin)) - Floating point sine(x)
((ftan)) - Floating point tangent(x)
((hypot)) - Euclidean distance function, calculate the hypotenuse of a right-angled triangle.
((ldexp)) - The value of x * 2**n
((log)) - Natural log(x)
((log10)) - Log base 10 of x
((max)) - Max of(a, b)
((min)) - Min of(a, b)
((modf)) - Split x into integral and fractional parts, each with the same sign as x.
((pow)) - The value of x**y
((rand)) - Generate a pseudo random number
((round)) - Round floating point value to nearest or even integral value. '''''(Not yet implemented.)'''''
sin - Implemented as ((fsin)).
((sinh)) - Floating point hyperbolic sine(x)
((sqr)) - Integer square root(x)
((sqrt)) - Floating point square root(x)
((srand)) - Set random number seed
tan - Implemented as ((ftan)).
((tanh)) - Floating point hyperbolic tangent(x)

== Process management and control ==
((abort)) - Abort the current process

== Time and date functions ==
((clock)) - Returns the processor time since the beginning of execution
((time)) - Returns the current calendar time
((strdate)) - Converts the current date to a string
((strtime)) - Converts the current time to a string

== See Also ==
((Command Reference)), ((Dialog Functions)), ((Image Functions)), ((System Functions))

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