From 1509ed785a0bc06e87ea087c46cc77a1eb700960 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20-rsm-=20Marek?= <rsm@disroot.org>
Date: Thu, 18 Jul 2024 17:54:41 +0200
Subject: [PATCH] Exerc 7_3.

---
 chapter_7.input_output/7_3.minprintf/Makefile |  3 ++
 chapter_7.input_output/7_3.minprintf/main.c   | 10 ++++++
 .../7_3.minprintf/minprintf.c                 | 31 +++++++++++++++++++
 .../7_3.minprintf/minprintf.h                 |  7 +++++
 .../7_3.minprintf/tests/0_internal.tin        |  0
 .../7_3.minprintf/tests/0_internal.tout       |  6 ++++
 6 files changed, 57 insertions(+)
 create mode 100644 chapter_7.input_output/7_3.minprintf/Makefile
 create mode 100644 chapter_7.input_output/7_3.minprintf/main.c
 create mode 100644 chapter_7.input_output/7_3.minprintf/minprintf.c
 create mode 100644 chapter_7.input_output/7_3.minprintf/minprintf.h
 create mode 100644 chapter_7.input_output/7_3.minprintf/tests/0_internal.tin
 create mode 100644 chapter_7.input_output/7_3.minprintf/tests/0_internal.tout

diff --git a/chapter_7.input_output/7_3.minprintf/Makefile b/chapter_7.input_output/7_3.minprintf/Makefile
new file mode 100644
index 0000000..e230801
--- /dev/null
+++ b/chapter_7.input_output/7_3.minprintf/Makefile
@@ -0,0 +1,3 @@
+BINARY=minprintf
+
+include ../../Exercise_incl.mk
diff --git a/chapter_7.input_output/7_3.minprintf/main.c b/chapter_7.input_output/7_3.minprintf/main.c
new file mode 100644
index 0000000..fac74ca
--- /dev/null
+++ b/chapter_7.input_output/7_3.minprintf/main.c
@@ -0,0 +1,10 @@
+# include "minprintf.h"
+
+int main ()
+{
+  minprintf("int -100: %d\nuint 222: %u\nhex 1A: %x\ndouble -5.003: %f\nchar 'X': %c\n"
+            "str \"KnR Solutions\": %s\n",
+            (int) -100, (unsigned int) 222, (int) 26, (double) -5.003, (char) 'X',
+            "KnR Solutions");
+  return 0;
+}
diff --git a/chapter_7.input_output/7_3.minprintf/minprintf.c b/chapter_7.input_output/7_3.minprintf/minprintf.c
new file mode 100644
index 0000000..b0c28b6
--- /dev/null
+++ b/chapter_7.input_output/7_3.minprintf/minprintf.c
@@ -0,0 +1,31 @@
+# include <stdio.h>
+# include <stdarg.h>
+
+/* minprintf: minimal printf with variable argument list */
+void minprintf (char *fmt, ...)
+{
+  va_list ap; /* points to each unnamed arg in turn */
+  char *p, *sval;
+  
+  va_start(ap, fmt); /* make ap point to 1st unnamed arg */
+  for (p = fmt; *p; p++) {
+    if (*p != '%') {
+      putchar(*p);
+      continue;
+    }
+    switch (*++p) {
+    case 'i':
+    case 'd': printf("%d", va_arg(ap, int)); break;
+    case 'u': printf("%u", va_arg(ap, unsigned int)); break;
+    case 'x': printf("%x", va_arg(ap, int)); break;
+    case 'f': printf("%f", va_arg(ap, double)); break;
+    case 'c': printf("%c", va_arg(ap, int)); break;
+    case 's':
+      for (sval = va_arg(ap, char *); *sval; sval++)
+        putchar(*sval);
+      break;
+    default: putchar(*p); break;
+    }
+  }
+  va_end(ap); /* clean up when done */
+}
diff --git a/chapter_7.input_output/7_3.minprintf/minprintf.h b/chapter_7.input_output/7_3.minprintf/minprintf.h
new file mode 100644
index 0000000..1aa98fa
--- /dev/null
+++ b/chapter_7.input_output/7_3.minprintf/minprintf.h
@@ -0,0 +1,7 @@
+# ifndef MINPRINTF_H
+# define MINPRINTF_H
+
+/* minprintf: minimal printf with variable argument list */
+void minprintf (char *fmt, ...);
+
+# endif
diff --git a/chapter_7.input_output/7_3.minprintf/tests/0_internal.tin b/chapter_7.input_output/7_3.minprintf/tests/0_internal.tin
new file mode 100644
index 0000000..e69de29
diff --git a/chapter_7.input_output/7_3.minprintf/tests/0_internal.tout b/chapter_7.input_output/7_3.minprintf/tests/0_internal.tout
new file mode 100644
index 0000000..3645af0
--- /dev/null
+++ b/chapter_7.input_output/7_3.minprintf/tests/0_internal.tout
@@ -0,0 +1,6 @@
+int -100: -100
+uint 222: 222
+hex 1A: 1a
+double -5.003: -5.003000
+char 'X': X
+str "KnR Solutions": KnR Solutions