wget2: Memory functions

| wget2 2.2.1

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Memory functions

## Functions
void * | wget_memdup (const void *m, size_t n)
char * | wget_strdup (const char *s)
char * | wget_strmemdup (const void *m, size_t n)
size_t | wget_strmemcpy (char *s, size_t ssize, const void *m, size_t n)
void * | wget_strmemcpy_a (char *s, size_t ssize, const void *m, size_t n)

## Detailed Description

This is a collections of short memory function not available in standard libraries.

## Function Documentation

## ◆ wget_memdup()

void * wget_memdup | ( | const void * | m,
|  | size_t | n )

Parameters

  [in] | m | Memory to clone
  [in] | n | Length of memory

Returns
  Cloned memory

Clone's the memory region `m` with length `n`. Returns NULL if `m` is NULL.

You should free() the returned pointer when not needed any more.

## ◆ wget_strdup()

char * wget_strdup | ( | const char * | s | ) |

Parameters

  [in] | s | String to clone

Returns
  Cloned string

Clone's the string `s` like strdup() does. Returns NULL if `s` is NULL.

You should free() the returned string when not needed any more.

## ◆ wget_strmemdup()

char * wget_strmemdup | ( | const void * | m,
|  | size_t | n )

Parameters

  [in] | m | Memory to convert into string
  [in] | n | Length of memory

Returns
  Created string

Convert the given memory region `m` with length `n` into a C string. Returns NULL if `m` is NULL.

You should free() the returned string when not needed any more.

## ◆ wget_strmemcpy()

size_t wget_strmemcpy | ( | char * | s,
|  | size_t | ssize,
|  | const void * | m,
|  | size_t | n )

Parameters

  [out] | s | Buffer to hold the C string output
  [in] | ssize | Size of the output buffer
  [in] | m | Memory to read from
  [in] | n | Length of memory

Returns
  Number of bytes copied, not counting the trailing 0 byte

Convert the given memory region `m` with length `n` into a C string at `s`. A max. of `ssize` - 1 is copied into `s`.

## ◆ wget_strmemcpy_a()

void * wget_strmemcpy_a | ( | char * | s,
|  | size_t | ssize,
|  | const void * | m,
|  | size_t | n )

Parameters

  [out] | s | Buffer to hold the C string output
  [in] | ssize | Size of the output buffer
  [in] | m | Memory to read from
  [in] | n | Length of memory

Returns
  Pointer to destination (either `s` or a freshly allocated buffer)

Convert the given memory region `m` with length `n` into a C string at `s` or at freshly allocated memory, if the space in `s` was not sufficient.

If `s` was too small to hold `n` + 1 bytes, the result must be free'd after use, e.g. if (res != s) wget_free(res);