Add set_vmem() and set_vmem_attr() functions to make it easier to manipulate

a struct vmem_cell.

src/conio/ciolib.c

@@ -134,6 +134,8 @@ CIOLIBEXPORT int CIOLIBCALL ciolib_restorescreen(struct ciolib_screen *scrn);
 CIOLIBEXPORT void CIOLIBCALL ciolib_setcolour(uint32_t fg, uint32_t bg);
 CIOLIBEXPORT int CIOLIBCALL ciolib_get_modepalette(uint32_t p[16]);
 CIOLIBEXPORT int CIOLIBCALL ciolib_set_modepalette(uint32_t p[16]);
+CIOLIBEXPORT void CIOLIBCALL ciolib_set_vmem(struct vmem_cell *cell, uint8_t ch, uint8_t attr, uint8_t font);
+CIOLIBEXPORT void CIOLIBCALL ciolib_set_vmem_attr(struct vmem_cell *cell, uint8_t attr);
 
 #if defined(WITH_SDL) || defined(WITH_SDL_AUDIO)
 int sdl_video_initialized = 0;
@@ -1999,3 +2001,26 @@ CIOLIBEXPORT int CIOLIBCALL ciolib_checkfont(int fontnum)
 	return 0;
 
 }
+
+CIOLIBEXPORT void CIOLIBCALL
+ciolib_set_vmem(struct vmem_cell *cell, uint8_t ch, uint8_t attr, uint8_t font)
+{
+	CIOLIB_INIT();
+
+	if (cell == NULL)
+		return;
+	cell->ch = ch;
+	cell->font = font;
+	ciolib_set_vmem_attr(cell, attr);
+}
+
+CIOLIBEXPORT void CIOLIBCALL
+ciolib_set_vmem_attr(struct vmem_cell *cell, uint8_t attr)
+{
+	CIOLIB_INIT();
+
+	if (cell == NULL)
+		return;
+	cell->legacy_attr = attr;
+	ciolib_attr2palette(attr, &cell->fg, &cell->bg);
+}

src/conio/ciolib.h

@@ -452,6 +452,8 @@ CIOLIBEXPORT uint32_t CIOLIBCALL ciolib_map_rgb(uint16_t r, uint16_t g, uint16_t
 CIOLIBEXPORT void CIOLIBCALL ciolib_replace_font(uint8_t id, char *name, void *data, size_t size);
 CIOLIBEXPORT int CIOLIBCALL ciolib_attrfont(uint8_t attr);
 CIOLIBEXPORT int CIOLIBCALL ciolib_checkfont(int font_num);
+CIOLIBEXPORT void CIOLIBCALL ciolib_set_vmem(struct vmem_cell *cell, uint8_t ch, uint8_t attr, uint8_t font);
+CIOLIBEXPORT void CIOLIBCALL ciolib_set_vmem_attr(struct vmem_cell *cell, uint8_t attr);
 
 /* DoorWay specific stuff that's only applicable to ANSI mode. */
 CIOLIBEXPORT void CIOLIBCALL ansi_ciolib_setdoorway(int enable);
@@ -531,6 +533,8 @@ CIOLIBEXPORT void CIOLIBCALL ansi_ciolib_setdoorway(int enable);
 	#define replace_font(a,b,c,d)	ciolib_replace_font(a,b,c,d)
 	#define attrfont(a)				ciolib_attrfont(a)
 	#define checkfont(a)			ciolib_checkfont(a)
+	#define set_vmem(a, b, c, d)		ciolib_set_vmem(a, b, c, d)
+	#define set_vmem_attr(a, b)		ciolib_set_vmem_attr(a, b)
 #endif
 
 #ifdef WITH_SDL