| Name |
Notes
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void *memcpy(void *dest, const void *src, size_t n);
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copies n bytes between two memory areas; if there is overlap, the behavior is undefined
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void *memmove(void *dest, const void *src, size_t n);
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copies n bytes between two memory areas; unlike with memcpy the areas may overlap
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void *memchr(const void *s, char c, size_t n);
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returns a pointer to the first occurrence of c in the first n bytes of s, or NULL if not found
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int memcmp(const void *s1, const void *s2, size_t n);
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compares the first n characters of two memory areas
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void *memset(void *, int, size_t);
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overwrites a memory area with a byte pattern
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char *strcat(char *dest, const char *src);
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appends the string src to dest
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char *strncat(char *dest, const char *src, size_t n);
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appends at most n characters of the string src to dest
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char *strchr(const char *, int);
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locates a character in a string, searching from the beginning
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char *strrchr(const char *, int);
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locates a character in a string, searching from the end
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int strcmp(const char *, const char *);
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compares two strings lexicographically
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int strncmp(const char *, const char *, size_t);
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compares up to the first n bytes of two strings lexicographically
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int strcoll(const char *, const char *);
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compares two strings using the current locale's collating order
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char *strcpy(char *toHere, const char *fromHere);
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copies a string from one location to another
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char *strncpy(char *toHere, const char *fromHere, size_t);
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copies up to n bytes of a string from one location to another
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char *strerror(int);
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returns the string representation of an error number e.g. errno (not thread-safe)
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size_t strlen(const char *);
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finds the length of a C string
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size_t strspn(const char *s, const char *accept);
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determines the length of the maximal initial substring of s consisting entirely of characters in accept
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size_t strcspn(const char *s, const char *reject);
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determines the length of the maximal initial substring of s consisting entirely of characters not in reject
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char *strpbrk(const char *s, const char *accept);
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finds the first occurrence of any character in accept in s
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char *strstr(const char *haystack, const char *needle);
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finds the first occurrence of the string "needle" in the longer string "haystack".
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char *strtok(char *, const char *);
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parses a string into a sequence of tokens; non-thread safe in the spec, non-reentrant
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size_t strxfrm(char *dest, const char *src, size_t n);
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transforms src into a collating form, such that the numerical sort order of the transformed string is equivalent to the collating order of src.
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