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/* MIT License
*
* Copyright (c) 2023 Tyge Løvset
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#define i_header // external linkage by default. override with i_static.
#define _i_inc_utf8
#include "utf8.h"
#ifndef CSVIEW_H_INCLUDED
#define CSVIEW_H_INCLUDED
#define csview_init() c_sv_1("")
#define csview_drop(p) c_default_drop(p)
#define csview_clone(sv) c_default_clone(sv)
#define csview_from_n(str, n) c_sv_2(str, n)
STC_API csview_iter csview_advance(csview_iter it, intptr_t pos);
STC_API intptr_t csview_find_sv(csview sv, csview search);
STC_API uint64_t csview_hash(const csview *self);
STC_API csview csview_slice_ex(csview sv, intptr_t p1, intptr_t p2);
STC_API csview csview_substr_ex(csview sv, intptr_t pos, intptr_t n);
STC_API csview csview_token(csview sv, const char* sep, intptr_t* start);
STC_INLINE csview csview_from(const char* str)
{ return c_LITERAL(csview){str, c_strlen(str)}; }
STC_INLINE void csview_clear(csview* self) { *self = csview_init(); }
STC_INLINE intptr_t csview_size(csview sv) { return sv.size; }
STC_INLINE bool csview_empty(csview sv) { return sv.size == 0; }
STC_INLINE bool csview_equals_sv(csview sv1, csview sv2)
{ return sv1.size == sv2.size && !c_memcmp(sv1.buf, sv2.buf, sv1.size); }
STC_INLINE bool csview_equals(csview sv, const char* str)
{ return csview_equals_sv(sv, c_sv_2(str, c_strlen(str))); }
STC_INLINE intptr_t csview_find(csview sv, const char* str)
{ return csview_find_sv(sv, c_sv_2(str, c_strlen(str))); }
STC_INLINE bool csview_contains(csview sv, const char* str)
{ return csview_find(sv, str) != c_NPOS; }
STC_INLINE bool csview_starts_with(csview sv, const char* str) {
intptr_t n = c_strlen(str);
return n > sv.size ? false : !c_memcmp(sv.buf, str, n);
}
STC_INLINE bool csview_ends_with(csview sv, const char* str) {
intptr_t n = c_strlen(str);
return n > sv.size ? false : !c_memcmp(sv.buf + sv.size - n, str, n);
}
STC_INLINE csview csview_substr(csview sv, intptr_t pos, intptr_t n) {
if (pos + n > sv.size) n = sv.size - pos;
sv.buf += pos, sv.size = n;
return sv;
}
STC_INLINE csview csview_slice(csview sv, intptr_t p1, intptr_t p2) {
if (p2 > sv.size) p2 = sv.size;
sv.buf += p1, sv.size = p2 > p1 ? p2 - p1 : 0;
return sv;
}
/* utf8 iterator */
STC_INLINE csview_iter csview_begin(const csview* self) {
if (!self->size) return c_LITERAL(csview_iter){NULL};
return c_LITERAL(csview_iter){.u8 = {{self->buf, utf8_chr_size(self->buf)},
self->buf + self->size}};
}
STC_INLINE csview_iter csview_end(const csview* self) {
return c_LITERAL(csview_iter){.u8 = {{NULL}, self->buf + self->size}};
}
STC_INLINE void csview_next(csview_iter* it) {
it->ref += it->chr.size;
it->chr.size = utf8_chr_size(it->ref);
if (it->ref == it->u8.end) it->ref = NULL;
}
/* utf8 */
STC_INLINE intptr_t csview_u8_size(csview sv)
{ return utf8_size_n(sv.buf, sv.size); }
STC_INLINE csview csview_u8_substr(csview sv, intptr_t bytepos, intptr_t u8len) {
sv.buf += bytepos;
sv.size = utf8_pos(sv.buf, u8len);
return sv;
}
STC_INLINE bool csview_valid_utf8(csview sv) // depends on src/utf8code.c
{ return utf8_valid_n(sv.buf, sv.size); }
#define c_fortoken_sv(it, inputsv, sep) \
for (struct { csview _inp, token, *ref; const char *_sep; intptr_t pos; } \
it = {._inp=inputsv, .token=it._inp, .ref=&it.token, ._sep=sep} \
; it.pos <= it._inp.size && (it.token = csview_token(it._inp, it._sep, &it.pos)).buf ; )
#define c_fortoken(it, input, sep) \
c_fortoken_sv(it, csview_from(input), sep)
/* ---- Container helper functions ---- */
STC_INLINE int csview_cmp(const csview* x, const csview* y) {
intptr_t n = x->size < y->size ? x->size : y->size;
int c = c_memcmp(x->buf, y->buf, n);
return c ? c : (int)(x->size - y->size);
}
STC_INLINE int csview_icmp(const csview* x, const csview* y)
{ return utf8_icmp_sv(*x, *y); }
STC_INLINE bool csview_eq(const csview* x, const csview* y)
{ return x->size == y->size && !c_memcmp(x->buf, y->buf, x->size); }
#endif // CSVIEW_H_INCLUDED
/* csview interaction with cstr: */
#ifdef CSTR_H_INCLUDED
STC_INLINE csview cstr_substr(const cstr* self, intptr_t pos, intptr_t n)
{ return csview_substr(cstr_sv(self), pos, n); }
STC_INLINE csview cstr_slice(const cstr* self, intptr_t p1, intptr_t p2)
{ return csview_slice(cstr_sv(self), p1, p2); }
STC_INLINE csview cstr_substr_ex(const cstr* self, intptr_t pos, intptr_t n)
{ return csview_substr_ex(cstr_sv(self), pos, n); }
STC_INLINE csview cstr_slice_ex(const cstr* self, intptr_t p1, intptr_t p2)
{ return csview_slice_ex(cstr_sv(self), p1, p2); }
STC_INLINE csview cstr_u8_substr(const cstr* self , intptr_t bytepos, intptr_t u8len)
{ return csview_u8_substr(cstr_sv(self), bytepos, u8len); }
#endif
/* -------------------------- IMPLEMENTATION ------------------------- */
#if defined i_implement || defined i_static
#ifndef CSVIEW_C_INCLUDED
#define CSVIEW_C_INCLUDED
STC_DEF csview_iter csview_advance(csview_iter it, intptr_t pos) {
int inc = -1;
if (pos > 0) pos = -pos, inc = 1;
while (pos && it.ref != it.u8.end) pos += (*(it.ref += inc) & 0xC0) != 0x80;
it.chr.size = utf8_chr_size(it.ref);
if (it.ref == it.u8.end) it.ref = NULL;
return it;
}
STC_DEF intptr_t csview_find_sv(csview sv, csview search) {
char* res = cstrnstrn(sv.buf, search.buf, sv.size, search.size);
return res ? (res - sv.buf) : c_NPOS;
}
STC_DEF uint64_t csview_hash(const csview *self)
{ return cbytehash(self->buf, self->size); }
STC_DEF csview csview_substr_ex(csview sv, intptr_t pos, intptr_t n) {
if (pos < 0) {
pos += sv.size;
if (pos < 0) pos = 0;
}
if (pos > sv.size) pos = sv.size;
if (pos + n > sv.size) n = sv.size - pos;
sv.buf += pos, sv.size = n;
return sv;
}
STC_DEF csview csview_slice_ex(csview sv, intptr_t p1, intptr_t p2) {
if (p1 < 0) {
p1 += sv.size;
if (p1 < 0) p1 = 0;
}
if (p2 < 0) p2 += sv.size;
if (p2 > sv.size) p2 = sv.size;
sv.buf += p1, sv.size = (p2 > p1 ? p2 - p1 : 0);
return sv;
}
STC_DEF csview csview_token(csview sv, const char* sep, intptr_t* start) {
intptr_t sep_size = c_strlen(sep);
csview slice = {sv.buf + *start, sv.size - *start};
const char* res = cstrnstrn(slice.buf, sep, slice.size, sep_size);
csview tok = {slice.buf, res ? (res - slice.buf) : slice.size};
*start += tok.size + sep_size;
return tok;
}
#endif // CSVIEW_C_INCLUDED
#endif // i_implement
#undef i_static
#undef i_header
#undef i_implement
#undef i_import
#undef i_opt
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