111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
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#include <gint/keyboard.h>
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#include <gint/display.h>
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#include <gint/defs/util.h>
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#include <stdlib.h>
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#include <string.h>
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#include "console.h"
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console_t *console_create(int max_lines)
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{
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console_t *cons = malloc(sizeof *cons);
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cons->max_lines = max_lines;
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cons->lines = calloc(max_lines, sizeof *cons->lines);
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for(int i = 0; i < max_lines; i++)
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cons->lines[i] = NULL;
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console_new_line(cons);
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return cons;
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}
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void console_new_line(console_t *cons)
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{
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int n = cons->max_lines;
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free(cons->lines[0]);
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for(int i = 0; i < n - 1; i++)
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cons->lines[i] = cons->lines[i+1];
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cons->lines[n - 1] = strdup("");
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}
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static void console_append_to_last_line(console_t *cons, void const *buf,
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int size)
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{
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int n = cons->max_lines;
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char *l = cons->lines[n - 1];
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int prev_size = l ? strlen(l) : 0;
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int new_size = prev_size + size + 1;
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l = realloc(l, new_size);
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if(!l)
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return;
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memcpy(l + prev_size, buf, size);
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l[new_size - 1] = 0;
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cons->lines[n - 1] = l;
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}
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void console_append_str(console_t *cons, char const *str)
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{
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console_append_buf(cons, str, strlen(str));
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}
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void console_append_buf(console_t *cons, void const *buf, size_t size_)
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{
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int offset = 0, size = size_;
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while(offset < size) {
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/* Find the first '\n' (or end of buffer) in the segment */
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void const *endline = memchr(buf + offset, '\n', size - offset);
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if(endline == NULL)
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endline = buf + size;
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int line_size = endline - (buf + offset);
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console_append_to_last_line(cons, buf + offset, line_size);
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offset += line_size;
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/* Found a '\n' */
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if(offset < size) {
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console_new_line(cons);
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offset++;
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}
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}
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}
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void console_render(int x, int y, console_t *cons, int w, int h)
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{
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int dy = 13;
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for(int i = 0; i < cons->max_lines; i++) {
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/* Skip initial unallocated lines */
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if(cons->lines[i] == NULL)
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continue;
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char const *p = cons->lines[i];
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char const *endline = p + strlen(p);
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while(p < endline) {
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if(p[0] == '\n') {
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y += dy;
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p++;
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continue;
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}
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char const *endscreen = drsize(p, NULL, w, NULL);
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char const *endline = strchrnul(p, '\n');
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int len = min(endscreen - p, endline - p);
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dtext_opt(x, y, C_BLACK, C_NONE, DTEXT_LEFT, DTEXT_TOP, p, len);
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y += dy;
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p += len + (p[len] == '\n');
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}
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}
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}
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void console_destroy(console_t *cons)
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{
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for(int i = 0; i < cons->max_lines; i++)
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free(cons->lines[i]);
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free(cons);
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}
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