ex29 extra credit

lcthw-remnants-2/ex29/src/dbg.h

@@ -0,0 +1,30 @@
+#ifndef __dbg_h__
+#define __dbg_h__
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#ifdef NDEBUG
+#define debug(M, ...)
+#else
+#define debug(M, ...) fprintf(stderr, "DEBUG %s:%d:%s: " M "\n", __FILE__, __LINE__, __func__, ##__VA_ARGS__)
+#endif
+
+#define clean_errno() (errno == 0 ? "None" : strerror(errno))
+
+#define log_err(M, ...) fprintf(stderr, "[ERROR] (%s:%d:%s: errno: %s) " M "\n", __FILE__, __LINE__, __func__, clean_errno(), ##__VA_ARGS__)
+
+#define log_warn(M, ...) fprintf(stderr, "[WARN] (%s:%d:%s: errno: %s) " M "\n", __FILE__, __LINE__, __func__, clean_errno(), ##__VA_ARGS__)
+
+#define log_info(M, ...) fprintf(stderr, "[INFO] (%s:%d:%s) " M "\n", __FILE__, __LINE__, __func__, ##__VA_ARGS__)
+
+#define check(A, M, ...) if(!(A)) { log_err(M, ##__VA_ARGS__); errno=0; goto error; }
+
+#define sentinel(M, ...) { log_err(M, ##__VA_ARGS__); errno=0; goto error; }
+
+#define check_mem(A) check((A), "Out of memory.")
+
+#define check_debug(A, M, ...) if(!(A)) { debug(M, ##__VA_ARGS__); errno=0; goto error; }
+
+#endif

lcthw-remnants-2/ex29/src/ex29.c

@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <ctype.h>
+#include "dbg.h"
+
+
+int print_a_message(const char *msg)
+{
+  printf("A STRING: %s\n", msg);
+
+  return 0;
+}
+
+
+int uppercase(const char *msg, int count)
+{
+  int i = 0;
+
+  for(i = 0; i < count; i++) {
+    printf("%c", toupper(msg[i]));
+  }
+
+  printf("\n");
+
+  return 0;
+}
+
+int lowercase(const char *msg, int count)
+{
+  int i = 0;
+
+  for(i = 0; i < count; i++) {
+    printf("%c", tolower(msg[i]));
+  }
+
+  printf("\n");
+
+  return 0;
+}
+
+int fail_on_purpose(const char *msg)
+{
+  return 1;
+}