Add API <kernaux/console.h>

.gitignore

@@ -21,6 +21,10 @@
 /include/Makefile.in
 /install-sh
 /missing
+/src/config.h
+/src/config.h.in
+/src/config.h.in~
+/src/stamp-h1
 /test-driver
 /test-suite.log
 /tests/test*.log

Makefile.am

@@ -16,6 +16,7 @@ noinst_PROGRAMS = \
 	tests/multiboot2_print2
 
 libkernaux_a_SOURCES = \
+	src/console.c \
 	src/multiboot2/helpers.c \
 	src/multiboot2/is_valid.c \
 	src/multiboot2/print.c \

README.md

@@ -22,7 +22,7 @@ API
 ---
 
 * [Multiboot 2 (GRUB 2) information parser](/include/kernaux/multiboot2.h)
-* Serial console *(planned)*
+* [Serial console](/include/kernaux/console.h)
 * [Page Frame Allocator](/include/kernaux/pfa.h) *(work in progress)*
 * ELF utils *(planned)*
 * [Architecture-specific helpers](/include/kernaux/arch/)

configure.ac

@@ -6,10 +6,14 @@ AC_INIT([libkernaux],
   [https://github.com/kernelmq/libkernaux])
 
 AC_CONFIG_SRCDIR([src/pfa.c])
+AC_CONFIG_HEADERS([src/config.h])
 
 AC_CANONICAL_HOST
 
-AM_CONDITIONAL(ARCH_X86, test "${host_cpu}" = "x86")
+AS_IF([test x"${host_cpu}" = x"x86"],
+  [AC_DEFINE([ARCH_X86],[1],[architecture is x86])])
+
+AM_CONDITIONAL(ARCH_X86, test x"${host_cpu}" = x"x86")
 
 AM_INIT_AUTOMAKE([1.9 subdir-objects -Wall -Werror])
 

include/Makefile.am

@@ -1,5 +1,6 @@
 nobase_include_HEADERS = \
 	kernaux/arch/x86.h \
+	kernaux/console.h \
 	kernaux/multiboot2.h \
 	kernaux/pfa.h \
 	kernaux/stdlib.h

include/kernaux/console.h

@@ -0,0 +1,17 @@
+#ifndef KERNAUX_INCLUDED_CONSOLE
+#define KERNAUX_INCLUDED_CONSOLE 1
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void kernaux_console_print(const char *s);
+void kernaux_console_putc(char c);
+void kernaux_console_puts(const char *s);
+void kernaux_console_write(const char *data, unsigned int size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/console.c

@@ -0,0 +1,29 @@
+#ifdef ARCH_X86
+#include <kernaux/arch/x86.h>
+#endif
+
+#include <kernaux/console.h>
+#include <kernaux/stdlib.h>
+
+void kernaux_console_print(const char *const s)
+{
+    kernaux_console_write(s, kernaux_strlen(s));
+}
+
+void kernaux_console_putc(const char c __attribute__((unused))) {
+#ifdef ARCH_X86
+    kernaux_arch_x86_outportb(0x3F8, c);
+#endif
+}
+
+void kernaux_console_puts(const char *const s)
+{
+    kernaux_console_print(s);
+    kernaux_console_putc('\n');
+}
+
+void kernaux_console_write(const char *const data, const unsigned int size) {
+    for (unsigned int i = 0; i < size; i++) {
+        kernaux_console_putc(data[i]);
+    }
+}