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2debf366a7
If the substring is a suffix, use a pointer to the existing string rather than constructing a new string.
27 lines
1.1 KiB
C
27 lines
1.1 KiB
C
#ifndef _IDRIS_UTF8
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#define _IDRIS_UTF8
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/* Various functions for dealing with UTF8 encoding. These are probably
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not very efficient (and I'm (EB) making no guarantees about their
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correctness.) Nevertheless, they mean that we can treat Strings as
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UFT8. Patches welcome :). */
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// Get length of a UTF8 encoded string in characters
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int idris_utf8_strlen(char *s);
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// Get number of bytes the first character takes in a string
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int idris_utf8_charlen(char* s);
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// Return int representation of string at an index.
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// Assumes in bounds.
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unsigned idris_utf8_index(char* s, int j);
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// Convert a char as an integer to a char* as a byte sequence
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// Null terminated; caller responsible for freeing
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char* idris_utf8_fromChar(int x);
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// Reverse a UTF8 encoded string, putting the result in 'result'
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char* idris_utf8_rev(char* s, char* result);
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// Advance a pointer into a string by i UTF8 characters.
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// Return original pointer if i <= 0.
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char* idris_utf8_advance(char* str, int i);
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// Return the offset of the ith UTF8 character in the string
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int idris_utf8_findOffset(char* str, int i);
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#endif
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