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63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
//---
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//
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// standard library module: string
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//
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// String manipulation using NUL-terminated byte arrays, without extended
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// characters.
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//
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//---
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#ifndef _STRING_H
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#define _STRING_H 1
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#include <stddef.h>
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//---
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// Memory manipulation.
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//---
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/*
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memcpy() O(byte_number)
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Copies a memory area. The two areas must not overlap (if they do, use
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memmove()). A smart copy is performed when possible. To enhance
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performance, make sure than destination and source are both 4-aligned.
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*/
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void *memcpy(void *destination, const void *source, size_t byte_number);
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/*
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memset() O(byte_number)
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Sets the contents of a memory area. A smart copy is performed.
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*/
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void *memset(void *destination, int byte, size_t byte_number);
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//---
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// String manipulation.
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//---
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/*
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strlen() O(len(str))
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Returns the length of a string.
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*/
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size_t strlen(const char *str);
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/*
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strcpy() O(len(source))
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Copies a string to another.
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*/
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char *strcpy(char *destination, const char *source);
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/*
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strchr() O(len(str))
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Searches a character in a string.
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*/
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const char *strchr(const char *str, int value);
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/*
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strncpy() O(min(len(source), size))
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Copies part of a string to another.
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*/
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char *strncpy(char *destination, const char *source, size_t size);
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#endif // _STRING_H
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