https://github.com/jbenner-radham/libsafec-strnlen_s

A header only implementation of "strnlen_s" from C11 - Annex K forked from libsafec (Safe C Library).
https://github.com/jbenner-radham/libsafec-strnlen_s

annex-k bounds-checking c11 safety secure-coding strnlen-s

Last synced: about 2 months ago
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A header only implementation of "strnlen_s" from C11 - Annex K forked from libsafec (Safe C Library).

• Host: GitHub
• URL: https://github.com/jbenner-radham/libsafec-strnlen_s
• Owner: jbenner-radham
• License: mit
• Created: 2015-02-23T21:47:59.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2015-03-05T21:46:27.000Z (almost 10 years ago)
• Last Synced: 2023-03-30T08:33:24.380Z (almost 2 years ago)
• Topics: annex-k, bounds-checking, c11, safety, secure-coding, strnlen-s
• Language: C
• Size: 137 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# libsafec - strnlen_s

### Synopsis

```c

#include "strnlen_s.h"

size_t strnlen_s(const char *s, size_t maxsize);

```

### Description

The `strnlen_s` function computes the length of the string pointed to by `s`.

### Specified In

ISO/IEC TR 24731-1 §6.7.4.3, Programming languages, environments and system software

interfaces, Extensions to the C Library, Part I: Bounds-checking interfaces.

### Input Parameters

- `s` pointer to string

- `maxsize` restricted maximum length.

### Output Parameters

    none

### Runtime Constraints

    none

### Returns

If `s` is a null pointer, then the `strnlen_s` function returns zero.

Otherwise, the `strnlen_s` function returns the number of characters that precede the terminating null character. If there is no null character in the first `maxsize` characters of `s` then `strnlen_s` returns `maxsize`. At most the first `maxsize` characters of `s` shall be accessed by `strnlen_s`.