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Source Code Standard Types div_t jmp_buf ldiv_t ptrdiff_t size_t va_list wchar_t Routines By Category Buffer Manipulation Routines Character Routines Data Conversion Routines Math Routines Memory Allocation Routines Stream I/O Routines String Routines Variable Length Argument Routines Miscellaneous Routines Include Files SFR Definitions assert.h ctype.h float.h inttypes.h limits.h math.h setjmp.h stdarg.h stddef.h stdio.h stdlib.h string.h Reference _chkdouble_ _chkfloat_ _getkey _tolower _toupper abs acos asin assert atan atan2 atof atoi atol calloc ceil cos cosh div exp fabs floor fmod free getchar gets init_mempool isalnum isalpha iscntrl isdigit isgraph islower isprint ispunct isspace isupper isxdigit labs ldiv log log10 longjmp malloc memccpy memchr memcmp memcpy memmove memset modf offsetof pow printf putchar puts rand realloc scanf setjmp sin sinh sprintf sqrt srand sscanf strcat strchr strcmp strcpy strcspn strlen strncat strncmp strncpy strpbrk strpos strrchr strrpbrk strrpos strspn strtod strtol strtoul tan tanh toascii toint tolower toupper ungetchar va_arg va_end va_start vprintf vsprintf AppendixString Routines
| Routine | Attributes | Description |
|---|---|---|
| strcat | Concatenates two strings. | |
| strchr | reentrant | Returns a pointer to the first occurrence of a specified character in a string. |
| strcmp | reentrant | Compares two strings. |
| strcpy | reentrant | Copies one string to another. |
| strcspn | Returns the index of the first character in a string that matches any character in a second string. | |
| strlen | reentrant | Returns the length of a string. |
| strncat | Concatenates up to a specified number of characters from one string to another. | |
| strncmp | Compares two strings up to a specified number of characters. | |
| strncpy | Copies up to a specified number of characters from one string to another. | |
| strpbrk | Returns a pointer to the first character in a string that matches any character in a second string. | |
| strpos | reentrant | Returns the index of the first occurrence of a specified character in a string. |
| strrchr | reentrant | Returns a pointer to the last occurrence of a specified character in a string. |
| strrpbrk | Returns a pointer to the last character in a string that matches any character in a second string. | |
| strrpos | reentrant | Returns the index of the last occurrence of a specified character in a string. |
| strspn | Returns the index of the first character in a string that does not match any character in a second string. |
The string routines are implemented as functions and are prototyped in the string.h include file. They perform the following operations:
- Copying strings
- Appending one string to the end of another
- Comparing two strings
- Locating one or more characters from a specified set in a string
All string functions operate on null-terminated character strings. Use the buffer manipulation routines to work on non-terminated strings.
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