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54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
#ifndef LIBSTRUTIL_H
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#define LIBSTRUTIL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Reverse a string in-place into the provided buffer.
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* @param input Source string (null-terminated).
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* @param output Buffer for the reversed string (must be at least strlen(input)+1).
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*/
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void strutil_reverse(const char* input, char* output);
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/**
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* Convert a string to uppercase into the provided buffer.
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* @param input Source string (null-terminated).
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* @param output Buffer for the uppercased string (must be at least strlen(input)+1).
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*/
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void strutil_uppercase(const char* input, char* output);
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/**
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* Convert a string to lowercase into the provided buffer.
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* @param input Source string (null-terminated).
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* @param output Buffer for the lowercased string (must be at least strlen(input)+1).
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*/
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void strutil_lowercase(const char* input, char* output);
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/**
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* Count the number of characters in a string.
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* @param input Source string (null-terminated).
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* @return Number of characters (excluding null terminator).
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*/
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int strutil_count_chars(const char* input);
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/**
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* Count occurrences of a character in a string.
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* @param input Source string (null-terminated).
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* @param ch Character to count.
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* @return Number of occurrences.
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*/
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int strutil_count_char(const char* input, char ch);
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/**
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* Return the library version string. Caller must NOT free.
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*/
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const char* strutil_version(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* LIBSTRUTIL_H */
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