Home
2 Library Reference
AVR Libc Library Reference
2 <string.h>: Strings
2.2 Functions
2.2.5 void * memchr
void * memchr(const void *, int, size_t) __ATTR_PURE__

AVRLibc

AVR Libc
1 User Manual
2 Library Reference
AVR Libc Library Reference
- 2 <alloca.h>: Allocate space in the stack
- 2 <assert.h>: Diagnostics
- 2 <avr/boot.h>: Bootloader Support Utilities
- 2 <avr/cpufunc.h>: Special AVR CPU functions
- 2 <avr/eeprom.h>: EEPROM handling
- 2 <avr/fuse.h>: Fuse Support
- 2 <avr/interrupt.h>: Interrupts
- 2 <avr/io.h>: AVR device-specific IO definitions
- 2 <avr/lock.h>: Lockbit Support
- 2 <avr/pgmspace.h>: Program Space Utilities
- 2 <avr/power.h>: Power Reduction Management
- 2 <avr/sfr_defs.h>: Special function registers
- 2 <avr/signature.h>: Signature Support
- 2 <avr/sleep.h>: Power Management and Sleep Modes
- 2 <avr/version.h>: avr-libc version macros
- 2 <avr/wdt.h>: Watchdog timer handling
- 2 <compat/deprecated.h>: Deprecated items
- 2 <compat/ina90.h>: Compatibility with IAR EWB 3.x
- 2 <ctype.h>: Character Operations
- 2 <errno.h>: System Errors
- 2 <inttypes.h>: Integer Type conversions
- 2 <math.h>: Mathematics
- 2 <setjmp.h>: Non-local goto
- 2 <stdint.h>: Standard Integer Types
- 2 <stdio.h>: Standard IO facilities
- 2 <stdlib.h>: General utilities
- 2 <string.h>: Strings
  - 2.1 Defines
  - 2.2 Functions
    - 2.2.1 int ffs
      int ffs(int __val)
    - 2.2.2 int ffsl
      int ffsl(long __val)
    - 2.2.3 int ffsll
      int ffsll(long long __val)
    - 2.2.4 void * memccpy
      void * memccpy(void *, const void *, int, size_t)
    - 2.2.5 void * memchr
      void * memchr(const void *, int, size_t) __ATTR_PURE__
    - 2.2.6 int memcmp
      int memcmp(const void *, const void *, size_t) __ATTR_PURE__
    - 2.2.7 void * memcpy
      void * memcpy(void *, const void *, size_t)
    - 2.2.8 void * memmem
      void * memmem(const void *, size_t, const void *, size_t) __ATTR_PURE__
    - 2.2.9 void * memmove
      void * memmove(void *, const void *, size_t)
    - 2.2.10 void * memrchr
      void * memrchr(const void *, int, size_t) __ATTR_PURE__
    - 2.2.11 void * memset
      void * memset(void *, int, size_t)
    - 2.2.12 char * strcat
      char * strcat(char *, const char *)
    - 2.2.13 char * strchr
      char * strchr(const char *, int) __ATTR_PURE__
    - 2.2.14 char * strchrnul
      char * strchrnul(const char *, int) __ATTR_PURE__
    - 2.2.15 int strcmp
      int strcmp(const char *, const char *) __ATTR_PURE__
    - 2.2.16 char * strcpy
      char * strcpy(char *, const char *)
    - 2.2.17 int strcasecmp
      int strcasecmp(const char *, const char *) __ATTR_PURE__
    - 2.2.18 char * strcasestr
      char * strcasestr(const char *, const char *) __ATTR_PURE__
    - 2.2.19 size_t strcspn
      size_t strcspn(const char *__s, const char *__reject) __ATTR_PURE__
    - 2.2.20 char * strdup
      char * strdup(const char *s1)
    - 2.2.21 size_t strlcat
      size_t strlcat(char *, const char *, size_t)
    - 2.2.22 size_t strlcpy
      size_t strlcpy(char *, const char *, size_t)
    - 2.2.23 size_t strlen
      size_t strlen(const char *) __ATTR_PURE__
    - 2.2.24 char * strlwr
      char * strlwr(char *)
    - 2.2.25 char * strncat
      char * strncat(char *, const char *, size_t)
    - 2.2.26 int strncmp
      int strncmp(const char *, const char *, size_t) __ATTR_PURE__
    - 2.2.27 char * strncpy
      char * strncpy(char *, const char *, size_t)
    - 2.2.28 int strncasecmp
      int strncasecmp(const char *, const char *, size_t) __ATTR_PURE__
    - 2.2.29 size_t strnlen
      size_t strnlen(const char *, size_t) __ATTR_PURE__
    - 2.2.30 char * strpbrk
      char * strpbrk(const char *__s, const char *__accept) __ATTR_PURE__
    - 2.2.31 char * strrchr
      char * strrchr(const char *, int) __ATTR_PURE__
    - 2.2.32 char * strrev
      char * strrev(char *)
    - 2.2.33 char * strsep
      char * strsep(char **, const char *)
    - 2.2.34 size_t strspn
      size_t strspn(const char *__s, const char *__accept) __ATTR_PURE__
    - 2.2.35 char * strstr
      char * strstr(const char *, const char *) __ATTR_PURE__
    - 2.2.36 char * strtok
      char * strtok(char *, const char *)
    - 2.2.37 char * strtok_r
      char * strtok_r(char *, const char *, char **)
    - 2.2.38 char * strupr
      char * strupr(char *)
- 2 <time.h>: Time
- 2 <util/atomic.h> Atomically and Non-Atomically Executed Code Blocks
- 2 <util/crc16.h>: CRC Computations
- 2 <util/delay.h>: Convenience functions for busy-wait delay loops
- 2 <util/delay_basic.h>: Basic busy-wait delay loops
- 2 <util/parity.h>: Parity bit generation
- 2 <util/setbaud.h>: Helper macros for baud rate calculations
- 2 <util/twi.h>: TWI bit mask definitions
- 2.1 Structures
3 Example Projects
4 Files

2.2.5 void * memchr

void * memchr(const void *, int, size_t) __ATTR_PURE__

The memchr() function scans the first len bytes of the memory area pointed to by src for the character val. The first byte to match val (interpreted as an unsigned character) stops the operation.

Remember:

The memchr() function returns a pointer to the matching byte or NULL if the character does not occur in the given memory area.

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.