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62 lines
1.9 KiB
62 lines
1.9 KiB
#ifndef _VIEW_H
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#define _VIEW_H
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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/// Printf format string for `view_t`
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#define SV_PRINT_FMT "%.*s"
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/// Printf format arguments for `view_t` to match the position of `SV_PRINT_FMT`
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#define SV_PRINT_ARG(view) (int)(view).len, (view).ptr
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typedef struct string_view {
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size_t len;
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char* ptr;
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} view_t;
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struct string_data;
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typedef struct string_data* str_info_t;
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struct string;
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// Functions //
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view_t s_get_str(str_info_t data) __attribute__((pure));
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str_info_t s_get_info(view_t str) __attribute__((pure));
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view_t sv_slice(view_t v, size_t s, size_t n);
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size_t sv_split(view_t p, char on, view_t* restrict first, view_t* restrict second);
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view_t sv_from_cstr(const char* p);
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view_t sv_slice_cstr(const char* p, size_t n);
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__attribute__((__gnu_inline__))
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extern inline size_t sv_split_cstr(const char* p, char on, view_t* restrict first, view_t* restrict second)
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{
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return sv_split(sv_from_cstr(p), on, first, second);
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}
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/// Copy `view` into nul-terminated `buffer`, up to `size` bytes. Return the number of bytes that would've been copied regardless of `sz` (incl. nul-terminator)
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size_t sv_copy_to(size_t sz, char buffer[restrict static sz], view_t view);
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char* sv_to_cstr(view_t view, char* restrict buffer, size_t n);
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// sprintf-like
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size_t sv_svnprintf(view_t* restrict out, size_t sz, view_t fmt, ...);
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size_t sv_svprintf(view_t* restrict out, view_t fmt, ...);
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size_t sv_sprintf(view_t* restrict out, const char* fmt, ...);
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size_t sv_snprintf(view_t* restrict out, size_t sz, const char* fmt, ...);
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__attribute__((__gnu_inline__, malloc))
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extern inline char* sv_dupto_cstr(view_t view)
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{ return sv_to_cstr(view, (char*)0, 0); }
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bool sv_eq_cstr(view_t a, const char* b);
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__attribute__((__gnu_inline__))
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extern inline bool sv_eq(view_t a, view_t b)
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{
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return a.len == b.len && (__builtin_expect(a.ptr == b.ptr, false) || (&sv_eq)(a, b));
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}
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#endif /* _VIEW_H */
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