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/*
* Copyright (c) 2026 Dylan Araps
*
* 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.
*/
#ifndef DYLAN_STR_H
#define DYLAN_STR_H
#include <assert.h>
#include <string.h>
#include "util.h"
struct str;
typedef usize (str_err)(struct str *, void *, usize l);
typedef struct str {
char *m;
usize l;
usize c;
str_err *f;
void *ctx;
} str;
#define STR_ERR ((usize) -1)
#define STR_PUSH(s, p) str_push((s), (p), sizeof(p) - 1)
#define STR_COPY(s, p) str_copy((s), (p), sizeof(p) - 1)
#define STR_INIT(s, m, f, ctx) do { \
static char b[(m)]; \
str_init((s), (b), sizeof(b), (f), (ctx)); \
} while (0)
static inline void
str_init(str *s, char *b, usize c, str_err *f, void *ctx)
{
s->m = b;
s->l = -(!b || !c);
s->c = c;
s->f = f;
s->ctx = ctx;
}
static inline usize
str_cb(str *s, usize l)
{
return s->f ? s->f(s, s->ctx, l) : STR_ERR;
}
static inline int
str_fit(str *s, usize l)
{
if (s->l + l < s->c) return 1;
return str_cb(s, l) != STR_ERR;
}
static inline void
str_copy(str *s, const char *p, usize l)
{
memcpy(&s->m[s->l], p, l);
s->l += l;
}
static inline void
str_copy_c(str *s, char c)
{
s->m[s->l++] = c;
}
static inline cut
str_push(str *s, const char *p, usize l)
{
if (!str_fit(s, l)) return (cut) { 0, 0 };
str_copy(s, p, l);
return (cut){ &s->m[s->l - l], l };
}
static inline void
str_push_c(str *s, char c)
{
if (!str_fit(s, 1)) return;
str_copy_c(s, c);
}
static inline void
str_push_s(str *s, const char *p)
{
str_push(s, p, strlen(p));
}
static inline void
str_memset(str *s, int c, usize n)
{
if (!str_fit(s, n)) return;
memset(&s->m[s->l], c, n);
s->l += n;
}
static inline usize
str_push_u32_b(str *s, u32 v, u32 b, int c, usize l)
{
static const char d[] = "0123456789abcdef";
char o[33];
char *p = &o[sizeof(o)];
assert(b >= 2 && b <= 16);
do {
*--p = d[v % b];
v /= b;
} while (v);
usize n = (usize)(&o[sizeof(o)] - p);
usize g = (n < l) ? l - n : 0;
if (g) str_memset(s, c, g);
str_push(s, p, n);
return g + n;
}
static inline usize
str_push_u32_p(str *s, u32 v, int c, usize l)
{
return str_push_u32_b(s, v, 10, c, l);
}
static inline usize
str_push_u32(str *s, u32 v)
{
return str_push_u32_p(s, v, 0, 0);
}
static inline void
str_push_u64(str *s, u64 v)
{
char b[21];
char *p = &b[sizeof(b)];
do {
*--p = (char)('0' + (v % 10));
v /= 10;
} while (v);
str_push(s, p, (usize)(&b[sizeof(b)] - p));
}
static inline void
str_push_sanitize(str *s, const char *p, usize l)
{
if (!str_fit(s, l)) return;
char *d = s->m + s->l;
const unsigned char *b = (const unsigned char *) p;
for (usize i = 0; i < l; i++) {
unsigned char c = b[i];
d[i] = (char)(c >= 0x20 && c != 0x7F ? c : '?');
}
s->l += l;
}
static inline int
str_cmp(str *a, str *b)
{
return a->l == b->l && *a->m == *b->m && !memcmp(a->m, b->m, b->l);
}
static inline void
str_terminate(str *s)
{
if (str_fit(s, 1)) s->m[s->l] = 0;
}
#endif // DYLAN_STR_H
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