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64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
/* this header file comes from libowfat, http://www.fefe.de/libowfat/ */
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#ifndef STR_H
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#define STR_H
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#include <stddef.h>
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#include <libowfat/compiler.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* str_copy copies leading bytes from in to out until \0.
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* return number of copied bytes. */
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att_write(1) att_read(2)
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size_t str_copy(char *out,const char *in) noexcept;
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/* str_diff returns negative, 0, or positive, depending on whether the
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* string a[0], a[1], ..., a[n]=='\0' is lexicographically smaller than,
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* equal to, or greater than the string b[0], b[1], ..., b[m-1]=='\0'.
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* If the strings are different, str_diff does not read bytes past the
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* first difference. */
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att_pure att_read(1) att_read(2)
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int str_diff(const char *a,const char *b) noexcept;
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/* str_diffn returns negative, 0, or positive, depending on whether the
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* string a[0], a[1], ..., a[n]=='\0' is lexicographically smaller than,
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* equal to, or greater than the string b[0], b[1], ..., b[m-1]=='\0'.
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* If the strings are different, str_diffn does not read bytes past the
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* first difference. The strings will be considered equal if the first
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* limit characters match. */
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att_pure att_read(1) att_read(2)
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int str_diffn(const char *a,const char *b,size_t limit) noexcept;
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#ifdef __dietlibc__
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#include <string.h>
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#define str_len(foo) strlen(foo)
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#else
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/* str_len returns the index of \0 in s */
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att_pure att_read(1)
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size_t str_len(const char *s) noexcept;
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#endif
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/* str_chr returns the index of the first occurance of needle or \0 in haystack */
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att_pure att_read(1)
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size_t str_chr(const char *haystack,char needle) noexcept;
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/* str_rchr returns the index of the last occurance of needle or \0 in haystack */
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att_pure att_read(1)
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size_t str_rchr(const char *haystack,char needle) noexcept;
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/* str_start returns 1 if the b is a prefix of a, 0 otherwise */
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att_pure att_read(1) att_read(2)
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int str_start(const char *a,const char *b) noexcept;
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/* convenience shortcut to test for string equality */
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#define str_equal(s,t) (!str_diff((s),(t)))
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#ifdef __cplusplus
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}
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#endif
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#endif
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