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-rw-r--r--src/basic/string32.c324
1 files changed, 324 insertions, 0 deletions
diff --git a/src/basic/string32.c b/src/basic/string32.c
new file mode 100644
index 0000000..c88a1a8
--- /dev/null
+++ b/src/basic/string32.c
@@ -0,0 +1,324 @@
+#include "basic/arena.h"
+#include <SDL2/SDL_keycode.h>
+#include <os/os.h>
+#include <string.h>
+
+#include <basic/basic.h>
+#include <basic/string32.h>
+
+
+
+void
+string32_buffer_move_cursor_left(String32Buffer *buffer)
+{
+ if (buffer->cursor > 0) {
+ buffer->cursor -= 1;
+ }
+}
+
+
+void
+string32_buffer_move_cursor_right(String32Buffer *buffer)
+{
+ if (buffer->cursor < buffer->len) {
+ buffer->cursor += 1;
+ }
+}
+
+
+b32
+string32_buffer_del_left(String32Buffer *buffer)
+{
+ if (buffer->cursor > 0){
+ u32 *dest = &buffer->codepoints[buffer->cursor - 1];
+ u32 *src = &buffer->codepoints[buffer->cursor];
+ size_t move_size = (buffer->len - buffer->cursor) * sizeof(u32);
+ memmove(dest, src, move_size);
+
+ buffer->len -= 1;
+ buffer->cursor -= 1;
+
+ return true;
+ }
+
+ return false;
+}
+
+
+b32
+string32_buffer_del_right(String32Buffer *buffer)
+{
+ if (buffer->cursor < buffer->len) {
+ u32 *dest = &buffer->codepoints[buffer->cursor];
+ u32 *src = &buffer->codepoints[buffer->cursor + 1];
+ size_t move_size = (buffer->len - buffer->cursor) * sizeof(u32);
+ memmove(dest, src, move_size);
+
+ buffer->len -= 1;
+
+ return true;
+ }
+
+ return false;
+}
+
+
+b32
+string32_buffer_insert(String32Buffer *buffer, u32 codepoint)
+{
+ if (buffer->len < buffer->max_len &&
+ buffer->cursor <= buffer->len)
+ {
+ u32 *dest = &buffer->codepoints[buffer->cursor + 1];
+ u32 *src = &buffer->codepoints[buffer->cursor];
+ size_t move_size = (buffer->len - buffer->cursor) * sizeof(u32);
+ memmove(dest, src, move_size);
+
+ buffer->codepoints[buffer->cursor] = codepoint;
+ buffer->len += 1;
+ buffer->cursor += 1;
+
+ return true;
+ }
+
+ return false;
+}
+
+
+void
+string32_buffer_edit(String32Buffer *buffer, OSEventKeyPress key_press)
+{
+ if (key_press.is_unicode) {
+ switch (key_press.code) {
+ case '\b': {
+ string32_buffer_del_left(buffer);
+ } break;
+
+ case 127: {
+ string32_buffer_del_right(buffer);
+ } break;
+
+ default: {
+ string32_buffer_insert(buffer, key_press.code);
+ }
+ }
+ }
+ else {
+ if (key_press.code == OS_KEYCODE_LEFT) {
+ string32_buffer_move_cursor_left(buffer);
+ }
+ else if (key_press.code == OS_KEYCODE_RIGHT) {
+ string32_buffer_move_cursor_right(buffer);
+ }
+ }
+}
+
+
+void
+string32_buffer_append_string32_buffer(String32Buffer *buffer, String32Buffer *src_buffer)
+{
+ size_t len_avail = buffer->max_len - buffer->len;
+ size_t copy_count = len_avail >= src_buffer->len ? src_buffer->len : len_avail;
+ u32 *dest = buffer->codepoints + buffer->len;
+ u32 *src = src_buffer->codepoints;
+ for (size_t i = 0; i < copy_count; i++) {
+ *dest++ = *src++;
+ }
+ buffer->len += copy_count;
+}
+
+
+void
+string32_buffer_append_string32(String32Buffer *buffer, String32 *str)
+{
+ size_t len_avail = buffer->max_len - buffer->len;
+ size_t copy_count = str->len >= len_avail ? len_avail : str->len;
+ u32 *dest = buffer->codepoints + buffer->len;
+ u32 *src = str->codepoints;
+ for (size_t i = 0; i < copy_count; i++) {
+ *dest++ = *src++;
+ }
+ buffer->len += copy_count;
+}
+
+
+void
+string32_buffer_append_ascii_cstr(String32Buffer *buffer, char *ascii)
+{
+ while (*ascii) {
+ if (buffer->len >= buffer->max_len) {
+ break;
+ }
+
+ buffer->codepoints[buffer->len] = *ascii;
+ buffer->len += 1;
+ ascii++;
+ }
+}
+
+
+void
+string32_buffer_copy_string32_buffer(String32Buffer *dest, String32Buffer *src)
+{
+ string32_buffer_reset(dest);
+ string32_buffer_append_string32_buffer(dest, src);
+}
+
+
+void
+string32_buffer_copy_string32(String32Buffer *buffer, String32 *str)
+{
+ string32_buffer_reset(buffer);
+ string32_buffer_append_string32(buffer, str);
+}
+
+
+b32 string32_buffer_equal_string32(String32Buffer *buffer, String32 *str)
+{
+ if (buffer->len != str->len) {
+ return false;
+ }
+ for (size_t i = 0; i < buffer->len; i++) {
+ if (buffer->codepoints[i] != str->codepoints[i]) {
+ return false;
+ }
+ }
+ return true;
+}
+
+
+String32 *
+string32_buffer_to_string32_with_len(Arena *arena, String32Buffer *buffer, size_t len)
+{
+ size_t push_size = sizeof(String32) + len * sizeof(u32);
+ String32 *result = arena_push(arena, push_size);
+
+ memcpy(result->codepoints, buffer->codepoints, len * sizeof(u32));
+ result->len = len;
+
+ return result;
+}
+
+
+String32 *
+string32_buffer_to_string32(Arena *arena, String32Buffer *buffer)
+{
+ size_t push_size = sizeof(String32) + buffer->len * sizeof(u32);
+ String32 *result = arena_push(arena, push_size);
+
+ memcpy(result->codepoints, buffer->codepoints, buffer->len * sizeof(u32));
+ result->len = buffer->len;
+
+ return result;
+}
+
+
+void
+string32_buffer_print(String32Buffer *buffer)
+{
+ for (size_t i = 0; i < buffer->len; i++) {
+ putchar(buffer->codepoints[i]);
+ }
+}
+
+
+void
+string32_buffer_reset(String32Buffer *buffer)
+{
+ buffer->len = 0;
+ buffer->cursor = 0;
+}
+
+void
+string32_buffer_init_in_place(String32Buffer *buffer, size_t max_len)
+{
+ buffer->cursor = 0;
+ buffer->len = 0;
+ buffer->max_len = max_len;
+}
+
+
+String32Buffer *
+string32_buffer_create(Arena *arena, size_t max_len)
+{
+ size_t push_size = sizeof(String32Buffer) + max_len * sizeof(u32);
+ String32Buffer *buffer = arena_push(arena, push_size);
+
+ buffer->cursor = 0;
+ buffer->len = 0;
+ buffer->max_len = max_len;
+
+ return buffer;
+}
+
+
+void
+string32_print(String32 *str)
+{
+ for (size_t i = 0; i < str->len; i++) {
+ putchar(str->codepoints[i]);
+ }
+}
+
+
+b32
+string32_equal(String32 *str1, String32 *str2) { if (str1->len != str2->len) {
+ return false;
+ }
+
+ for (size_t i = 0; i < str1->len; i++) {
+ if (str1->codepoints[i] != str2->codepoints[i]) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+
+String32 *
+string32_create_from_u32_array(Arena *arena, u32 *buffer, size_t len)
+{
+ size_t push_size = sizeof(String32) + len * sizeof(u32);
+ String32 *result = arena_push(arena, push_size);
+
+ memcpy(result->codepoints, buffer, len);
+ result->len = len;
+
+ return result;
+}
+
+
+
+String32 *
+string32_create_from_string32(Arena *arena, String32 *src)
+{
+ size_t push_size = sizeof(String32) + src->len * sizeof(u32);
+ String32 *result = arena_push(arena, push_size);
+
+ for (size_t i = 0; i < src->len; i++) {
+ result->codepoints[i] = src->codepoints[i];
+ }
+ result->len = src->len;
+
+ return result;
+}
+
+
+String32 *
+string32_create_from_ascii(Arena *arena, char *ascii)
+{
+ size_t len = strlen(ascii);
+
+ size_t push_size = sizeof(String32) + strlen(ascii) * sizeof(u32);
+ String32 *result = arena_push(arena, push_size);
+
+ u32 *dest = result->codepoints;
+ while (*ascii) {
+ *dest++ = *ascii++;
+ }
+ result->len = len;
+
+ return result;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2025-09-16 07:47:31 +0000