b64.c File Reference
`#include "ortp/b64.h"`
`#include <assert.h>`
`#include <string.h>`
`#include "ortp/port.h"`

## Data Structures

struct | b64ErrorString_t_

## Macros

#define | B64_VER_C_B64_MAJOR 1
#define | B64_VER_C_B64_MINOR 2
#define | B64_VER_C_B64_REVISION 3
#define | B64_VER_C_B64_EDIT 17
#define | NUM_PLAIN_DATA_BYTES (3)
#define | NUM_ENCODED_DATA_BYTES (4)
#define | NUM_ELEMENTS(x) (sizeof(x) / sizeof(x[0]))
#define | SEVERITY_STR_DECL(rc, desc)
#define | SEVERITY_STR_ENTRY(rc)

## Typedefs

typedef struct b64ErrorString_t_ | b64ErrorString_t_

## Functions

size_t | b64_encode (void const *src, size_t srcSize, char *dest, size_t destLen)
| Encodes a block of binary data into Base-64. More...
size_t | b64_encode2 (void const *src, size_t srcSize, char *dest, size_t destLen, unsigned flags, int lineLen, B64_RC *rc)
| Encodes a block of binary data into Base-64. More...
size_t | b64_decode (char const *src, size_t srcLen, void *dest, size_t destSize)
| Decodes a sequence of Base-64 into a block of binary data. More...
size_t | b64_decode2 (char const *src, size_t srcLen, void *dest, size_t destSize, unsigned flags, char const **badChar, B64_RC *rc)
| Decodes a sequence of Base-64 into a block of binary data. More...
char const * | b64_getErrorString (B64_RC code)
| Returns the textual description of the error. More...
size_t | b64_getErrorStringLength (B64_RC code)
| Returns the length of the textual description of the error. More...

## Detailed Description

Implementation file for the b64 library

## Macro Definition Documentation

## SEVERITY_STR_DECL

#define SEVERITY_STR_DECL | ( |  | rc,
|  |  | desc
| ) |  |

Value:
\
static const char s_str##rc[] = desc; \
static const b64ErrorString_t_ s_rct##rc = { rc, s_str##rc, NUM_ELEMENTS(s_str##rc) - 1 }
b64ErrorString_t_
Definition: b64.c:520

## SEVERITY_STR_ENTRY

#define SEVERITY_STR_ENTRY | ( |  | rc | ) |

Value:
\
&s_rct##rc

## Function Documentation

## b64_decode()

size_t b64_decode | ( | char const * | src,
|  | size_t | srcLen,
|  | void * | dest,
|  | size_t | destSize
| ) |  |

Decodes a sequence of Base-64 into a block of binary data.

Parameters

  src | Pointer to the Base-64 block to be decoded. May not be NULL, except when `dest` is NULL, in which case it is ignored. If `dest` is NULL, and `src` is not NULL, then the returned value is calculated exactly, otherwise a value is returned that is guaranteed to be large enough to hold the decoded block.
  srcLen | Length of block to be encoded. Must be an integral of 4, the Base-64 encoding quantum, otherwise the Base-64 block is assumed to be invalid
  dest | Pointer to the buffer into which the result is to be written. May be NULL, in which case the function returns the required length
  destSize | Length of the buffer into which the result is to be written. Must be at least as large as that indicated by the return value from `b64_decode(src, srcSize, NULL, 0)`, even in the case where the encoded form contains a number of characters that will be ignored, resulting in a lower total length of converted form.

Returns
  0 if the size of the buffer was insufficient, or the length of the converted buffer was longer than `destSize`

Note
  The function returns the required length if `dest` is NULL. The returned size might be larger than the actual required size, but will never be smaller.
  The behaviour of both b64_encode2() and b64_decode2() are undefined if the line length is not a multiple of 4.
  Threading: The function is fully re-entrant.

See also
  b64::decode()

## b64_decode2()

size_t b64_decode2 | ( | char const * | src,
|  | size_t | srcLen,
|  | void * | dest,
|  | size_t | destSize,
|  | unsigned | flags,
|  | char const ** | badChar,
|  | B64_RC * | rc
| ) |  |

Decodes a sequence of Base-64 into a block of binary data.

Parameters

  src | Pointer to the Base-64 block to be decoded. May not be NULL, except when `dest` is NULL, in which case it is ignored. If `dest` is NULL, and `src` is not NULL, then the returned value is calculated exactly, otherwise a value is returned that is guaranteed to be large enough to hold the decoded block.
  srcLen | Length of block to be encoded. Must be an integral of 4, the Base-64 encoding quantum, otherwise the Base-64 block is assumed to be invalid
  dest | Pointer to the buffer into which the result is to be written. May be NULL, in which case the function returns the required length
  destSize | Length of the buffer into which the result is to be written. Must be at least as large as that indicated by the return value from `b64_decode(src, srcSize, NULL, 0)`, even in the case where the encoded form contains a number of characters that will be ignored, resulting in a lower total length of converted form.
  flags | A combination of the B64_FLAGS enumeration, that moderate the behaviour of the function.
  rc | The return code representing the status of the operation. May be NULL.
  badChar | If the flags parameter does not contain B64_F_STOP_ON_NOTHING, this parameter specifies the address of a pointer that will be set to point to any character in the sequence that stops the parsing, as dictated by the flags parameter. May be NULL.

Returns
  0 if the size of the buffer was insufficient, or the length of the converted buffer was longer than `destSize`, or a bad character stopped parsing.

Note
  The function returns the required length if `dest` is NULL. The returned size might be larger than the actual required size, but will never be smaller.
  The behaviour of both b64_encode2() and b64_decode2() are undefined if the line length is not a multiple of 4.
  Threading: The function is fully re-entrant.

See also
  b64::decode()

## b64_encode()

size_t b64_encode | ( | void const * | src,
|  | size_t | srcSize,
|  | char * | dest,
|  | size_t | destLen
| ) |  |

Encodes a block of binary data into Base-64.

Parameters

  src | Pointer to the block to be encoded. May not be NULL, except when `dest` is NULL, in which case it is ignored.
  srcSize | Length of block to be encoded
  dest | Pointer to the buffer into which the result is to be written. May be NULL, in which case the function returns the required length
  destLen | Length of the buffer into which the result is to be written. Must be at least as large as that indicated by the return value from b64_encode(NULL, srcSize, NULL, 0).

Returns
  0 if the size of the buffer was insufficient, or the length of the converted buffer was longer than `destLen`

Note
  The function returns the required length if `dest` is NULL
  The function returns the required length if `dest` is NULL. The returned size might be larger than the actual required size, but will never be smaller.
  Threading: The function is fully re-entrant.

See also
  b64::encode()

## b64_encode2()

size_t b64_encode2 | ( | void const * | src,
|  | size_t | srcSize,
|  | char * | dest,
|  | size_t | destLen,
|  | unsigned | flags,
|  | int | lineLen,
|  | B64_RC * | rc
| ) |  |

Encodes a block of binary data into Base-64.

Parameters

  src | Pointer to the block to be encoded. May not be NULL, except when `dest` is NULL, in which case it is ignored.
  srcSize | Length of block to be encoded
  dest | Pointer to the buffer into which the result is to be written. May be NULL, in which case the function returns the required length
  destLen | Length of the buffer into which the result is to be written. Must be at least as large as that indicated by the return value from b64_encode2(NULL, srcSize, NULL, 0, flags, lineLen, rc).
  flags | A combination of the B64_FLAGS enumeration, that moderate the behaviour of the function
  lineLen | If the flags parameter contains B64_F_LINE_LEN_USE_PARAM, then this parameter represents the length of the lines into which the encoded form is split, with a hard line break ('\r\n'). If this value is 0, then the line is not split. If it is <0, then the RFC-1113 recommended line length of 64 is used
  rc | The return code representing the status of the operation. May be NULL.

Returns
  0 if the size of the buffer was insufficient, or the length of the converted buffer was longer than `destLen`

Note
  The function returns the required length if `dest` is NULL. The returned size might be larger than the actual required size, but will never be smaller.
  Threading: The function is fully re-entrant.

See also
  b64::encode()

## b64_getErrorString()

char const* b64_getErrorString | ( | B64_RC | code | ) |

Returns the textual description of the error.

Parameters

  code | The error code

## b64_getErrorStringLength()

size_t b64_getErrorStringLength | ( | B64_RC | code | ) |

Returns the length of the textual description of the error.

See also
  b64_getErrorString()

Parameters

  code | The error code

References b64ErrorString_t_::len.