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This commit is contained in:
Kamil Kowalczyk
2026-03-05 16:29:59 +01:00
parent a5f5dbf21f
commit 25b289ccfb
11 changed files with 316 additions and 30 deletions
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40
ce/gapbuffer.c
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@@ -1,11 +1,12 @@
#include "gapbuffer.h"
#include "arena_alloc.h"
#include <arena.h>
#include <liballoc.h>
#include <stddef.h>
#include <string.h>
void gapbuffer_init (struct gapbuffer* gb, size_t capacity) {
gb->buffer = arena_malloc (&arena, capacity);
void gapbuffer_init (gb_malloc_func_t mallocfn, void* ctx, struct gapbuffer* gb, size_t capacity) {
gb->buffer = mallocfn (ctx, capacity);
if (gb->buffer == NULL)
return;
@@ -16,13 +17,16 @@ void gapbuffer_init (struct gapbuffer* gb, size_t capacity) {
gb->gap_end = capacity;
}
void gapbuffer_fini (struct gapbuffer* gb) { memset (gb, 0, sizeof (*gb)); }
void gapbuffer_fini (gb_free_func_t freefn, void* ctx, struct gapbuffer* gb) {
freefn (ctx, gb->buffer);
memset (gb, 0, sizeof (*gb));
}
void gapbuffer_grow (struct gapbuffer* gb) {
void gapbuffer_grow (gb_realloc_func_t reallocfn, void* ctx, struct gapbuffer* gb) {
size_t old_size = gb->size;
size_t new_size = gb->size * 2;
char* new = arena_realloc (&arena, gb->buffer, old_size, new_size);
char* new = reallocfn (ctx, gb->buffer, old_size, new_size);
if (new == NULL)
return;
@@ -55,9 +59,9 @@ void gapbuffer_move (struct gapbuffer* gb, size_t pos) {
}
}
void gapbuffer_insert (struct gapbuffer* gb, char c) {
void gapbuffer_insert (gb_realloc_func_t reallocfn, void* ctx, struct gapbuffer* gb, char c) {
if (gb->gap_start == gb->gap_end)
gapbuffer_grow (gb);
gapbuffer_grow (reallocfn, ctx, gb);
gb->buffer[gb->gap_start] = c;
gb->gap_start++;
@@ -68,10 +72,10 @@ void gapbuffer_backspace (struct gapbuffer* gb) {
gb->gap_start--;
}
char* gapbuffer_get_string (struct gapbuffer* gb) {
char* gapbuffer_get_string (gb_malloc_func_t mallocfn, void* ctx, struct gapbuffer* gb) {
size_t size = gb->size - (gb->gap_end - gb->gap_start);
char* str = arena_malloc (&arena, size + 1);
char* str = mallocfn (ctx, size + 1);
if (str == NULL)
return NULL;
@@ -86,7 +90,7 @@ char* gapbuffer_get_string (struct gapbuffer* gb) {
size_t gapbuffer_length (struct gapbuffer* gb) { return gb->size - (gb->gap_end - gb->gap_start); }
char* gapbuffer_string_at (struct gapbuffer* gb, size_t pos) {
char* gapbuffer_string_at (gb_malloc_func_t mallocfn, void* ctx, struct gapbuffer* gb, size_t pos) {
size_t total_size = gapbuffer_length (gb);
if (pos >= total_size)
@@ -94,7 +98,7 @@ char* gapbuffer_string_at (struct gapbuffer* gb, size_t pos) {
size_t tail_size = total_size - pos;
char* res = arena_malloc (&arena, tail_size + 1);
char* res = mallocfn (ctx, tail_size + 1);
if (res == NULL)
return NULL;
@@ -124,3 +128,17 @@ char* gapbuffer_string_at (struct gapbuffer* gb, size_t pos) {
res[written] = '\0';
return res;
}
char gapbuffer_at (struct gapbuffer* gb, size_t index) {
if (index < gb->gap_start)
return gb->buffer[index];
else
return gb->buffer[index + (gb->gap_end - gb->gap_start)];
}
void gapbuffer_delete_at (struct gapbuffer* gb, size_t index) {
gapbuffer_move (gb, index);
if (gb->gap_end < gb->size)
gb->gap_end++;
}