Add framebuffer files

Makefile.am

@@ -49,6 +49,10 @@ libkernaux_a_SOURCES += src/elf.c
 TESTS += tests/test_elf
 endif
 
+if WITH_FRAMEBUFFER
+libkernaux_a_SOURCES += src/framebuffer.c
+endif
+
 if WITH_MULTIBOOT2
 libkernaux_a_SOURCES += \
 	src/multiboot2/helpers.c \

README.md

@@ -39,7 +39,7 @@ API
     * [Guards](/examples/assert_guards.c)
 * Device drivers (for debugging only)
   * [Serial console](/include/kernaux/console.h)
-  * Framebuffer *(planned)*
+  * [Framebuffer](/include/kernaux/framebuffer.h) *(planned)*
 * Algorithms
   * [Simple command line parser](/include/kernaux/cmdline.h)
     * [Example](/examples/cmdline.c)
@@ -94,6 +94,7 @@ are some non-default options:
 * `--with[out]-cmdline`
 * `--with[out]-console`
 * `--with[out]-elf`
+* `--with[out]-framebuffer`
 * `--with[out]-multiboot2`
 * `--with[out]-pfa`
 * `--with[out]-units`

configure.ac

@@ -13,24 +13,25 @@ AC_CANONICAL_HOST
 
 
 dnl Features (disabled by default)
-AC_ARG_ENABLE([assert],      AS_HELP_STRING([--enable-assert],      [enable runtime assertions]))
-AC_ARG_ENABLE([guard],       AS_HELP_STRING([--enable-guard],       [enable argument guards]))
-AC_ARG_ENABLE([guard-cond],  AS_HELP_STRING([--enable-guard-cond],  [enable condition guard]))
-AC_ARG_ENABLE([guard-null],  AS_HELP_STRING([--enable-guard-null],  [enable NULL-guard]))
+AC_ARG_ENABLE([assert],      AS_HELP_STRING([--enable-assert],       [enable runtime assertions]))
+AC_ARG_ENABLE([guard],       AS_HELP_STRING([--enable-guard],        [enable argument guards]))
+AC_ARG_ENABLE([guard-cond],  AS_HELP_STRING([--enable-guard-cond],   [enable condition guard]))
+AC_ARG_ENABLE([guard-null],  AS_HELP_STRING([--enable-guard-null],   [enable NULL-guard]))
 
 dnl Packages (enabled by default)
-AC_ARG_WITH(  [cmdline],     AS_HELP_STRING([--without-cmdline],    [without command line parser]))
-AC_ARG_WITH(  [console],     AS_HELP_STRING([--without-console],    [without serial console]))
-AC_ARG_WITH(  [elf],         AS_HELP_STRING([--without-elf],        [without ELF utils]))
-AC_ARG_WITH(  [multiboot2],  AS_HELP_STRING([--without-multiboot2], [without Multiboot 2 information parser]))
-AC_ARG_WITH(  [pfa],         AS_HELP_STRING([--without-pfa],        [without Page Frame Allocator]))
-AC_ARG_WITH(  [units],       AS_HELP_STRING([--without-units],      [without measurement units utils]))
+AC_ARG_WITH(  [cmdline],     AS_HELP_STRING([--without-cmdline],     [without command line parser]))
+AC_ARG_WITH(  [console],     AS_HELP_STRING([--without-console],     [without serial console]))
+AC_ARG_WITH(  [elf],         AS_HELP_STRING([--without-elf],         [without ELF utils]))
+AC_ARG_WITH(  [framebuffer], AS_HELP_STRING([--without-framebuffer], [without framebuffer]))
+AC_ARG_WITH(  [multiboot2],  AS_HELP_STRING([--without-multiboot2],  [without Multiboot 2 information parser]))
+AC_ARG_WITH(  [pfa],         AS_HELP_STRING([--without-pfa],         [without Page Frame Allocator]))
+AC_ARG_WITH(  [units],       AS_HELP_STRING([--without-units],       [without measurement units utils]))
 
 dnl Packages (disabled by default)
-AC_ARG_WITH(  [libc],        AS_HELP_STRING([--with-libc],          [with libc replacement]))
-AC_ARG_WITH(  [libc-memset], AS_HELP_STRING([--with-libc-memset],   [with memset replacement]))
-AC_ARG_WITH(  [libc-strcpy], AS_HELP_STRING([--with-libc-strcpy],   [with strcpy replacement]))
-AC_ARG_WITH(  [libc-strlen], AS_HELP_STRING([--with-libc-strlen],   [with strlen replacement]))
+AC_ARG_WITH(  [libc],        AS_HELP_STRING([--with-libc],           [with libc replacement]))
+AC_ARG_WITH(  [libc-memset], AS_HELP_STRING([--with-libc-memset],    [with memset replacement]))
+AC_ARG_WITH(  [libc-strcpy], AS_HELP_STRING([--with-libc-strcpy],    [with strcpy replacement]))
+AC_ARG_WITH(  [libc-strlen], AS_HELP_STRING([--with-libc-strlen],    [with strlen replacement]))
 
 
 
@@ -64,6 +65,7 @@ dnl Packages (enabled by default)
 AM_CONDITIONAL([WITH_CMDLINE],      [test "$with_cmdline"      != no])
 AM_CONDITIONAL([WITH_CONSOLE],      [test "$with_console"      != no])
 AM_CONDITIONAL([WITH_ELF],          [test "$with_elf"          != no])
+AM_CONDITIONAL([WITH_FRAMEBUFFER],  [test "$with_framebuffer"  != no])
 AM_CONDITIONAL([WITH_MULTIBOOT2],   [test "$with_multiboot2"   != no])
 AM_CONDITIONAL([WITH_PFA],          [test "$with_pfa"          != no])
 AM_CONDITIONAL([WITH_UNITS],        [test "$with_units"        != no])
@@ -88,6 +90,7 @@ dnl Packages (enabled by default)
 AS_IF([test "$with_cmdline"       != no], [AC_DEFINE([WITH_CMDLINE],              [1], [with command line parser])])
 AS_IF([test "$with_console"       != no], [AC_DEFINE([WITH_CONSOLE],              [1], [with serial console])])
 AS_IF([test "$with_elf"           != no], [AC_DEFINE([WITH_ELF],                  [1], [with ELF utils])])
+AS_IF([test "$with_framebuffer"   != no], [AC_DEFINE([WITH_FRAMEBUFFER],          [1], [with framebuffer])])
 AS_IF([test "$with_multiboot2"    != no], [AC_DEFINE([WITH_MULTIBOOT2],           [1], [with Multiboot 2 information parser])])
 AS_IF([test "$with_pfa"           != no], [AC_DEFINE([WITH_PFA],                  [1], [with Page Frame Allocator])])
 AS_IF([test "$with_units",        != no], [AC_DEFINE([WITH_UNITS],                [1], [with measurement units utils])])

include/Makefile.am

@@ -8,6 +8,7 @@ nobase_include_HEADERS = \
 	kernaux/cmdline.h \
 	kernaux/console.h \
 	kernaux/elf.h \
+	kernaux/framebuffer.h \
 	kernaux/itoa.h \
 	kernaux/libc.h \
 	kernaux/multiboot2.h \

include/kernaux.h

@@ -10,6 +10,7 @@
 #include <kernaux/cmdline.h>
 #include <kernaux/console.h>
 #include <kernaux/elf.h>
+#include <kernaux/framebuffer.h>
 #include <kernaux/itoa.h>
 #include <kernaux/multiboot2.h>
 #include <kernaux/pfa.h>

include/kernaux/framebuffer.h

@@ -0,0 +1,12 @@
+#ifndef KERNAUX_INCLUDED_FRAMEBUFFER
+#define KERNAUX_INCLUDED_FRAMEBUFFER
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/framebuffer.c

@@ -0,0 +1,8 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <kernaux/framebuffer.h>
+
+__attribute__((unused))
+static const int foobar = 0;