chore: add basic utilities

common/utils.c

@@ -1,2 +0,0 @@
-
-#include "utils.h"

include/arguments.h

@@ -0,0 +1,83 @@
+
+#ifndef ARGUMENTS_H
+#define ARGUMENTS_H
+
+#include <argp.h>
+#include <stdlib.h>
+
+struct arguments {};
+
+#define USAGE 0x123
+
+static struct argp_option options[] = {
+    {
+        .name = "help",
+        .key = 'h',
+        .arg = 0,
+        .flags = 0,
+        .doc = "Show this help list",
+        .group = -1,
+    },
+    {
+        .name = "usage",
+        .key = USAGE,
+        .arg = 0,
+        .flags = 0,
+        .doc = "Give a short usage message",
+        .group = 0,
+    },
+    {
+        .name = "version",
+        .key = 'v',
+        .arg = 0,
+        .flags = 0,
+        .doc = "Print program version",
+        .group = -1,
+    },
+    {0},
+};
+
+static error_t parser(int key, [[gnu::unused]] char *arg,
+                      struct argp_state *state) {
+
+  [[gnu::unused]]
+  struct arguments *arguments = (struct arguments *)state->input;
+  switch (key) {
+  case USAGE: {
+    argp_state_help(state, state->out_stream,
+                    ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
+    break;
+  }
+#undef USAGE
+  case 'h': {
+    argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
+    break;
+  }
+  case 'v': {
+    fprintf(state->out_stream, "%s\n", argp_program_version);
+    exit(0);
+    break;
+  }
+  case ARGP_KEY_ARG: {
+    return ARGP_ERR_UNKNOWN;
+  }
+  case ARGP_KEY_NO_ARGS: {
+    return 0;
+  }
+  case ARGP_KEY_END: {
+    return 0;
+  }
+  default:
+    return ARGP_ERR_UNKNOWN;
+  }
+  return 0;
+}
+
+static struct argp argp = {
+    .options = options,
+    .parser = parser,
+    .args_doc = "",
+    .doc = "",
+};
+
+#endif

include/utils.h

@@ -2,4 +2,10 @@
 #ifndef UTILS_H
 #define UTILS_H
 
+void print_usage(const char *prog_name);
+
+void log_info(const char *fmt, ...);
+
+void log_error(const char *fmt, ...);
+
 #endif

src/main.c

@@ -1,2 +1,7 @@
+#include "arguments.h"
 
-int main(int argc, char **argv) { return 0; }
+int main(int argc, char **argv) {
+  struct arguments arguments = {};
+  argp_parse(&argp, argc, argv, ARGP_NO_HELP, 0, &arguments);
+  return 0;
+}

src/utils.c

@@ -0,0 +1,20 @@
+
+#include "utils.h"
+#include <stdarg.h>
+#include <stdio.h>
+
+void log_info(const char *fmt, ...) {
+  va_list args;
+  va_start(args, fmt);
+  fprintf(stdout, "[INFO] ");
+  vfprintf(stdout, fmt, args);
+  va_end(args);
+}
+
+void log_error(const char *fmt, ...) {
+  va_list args;
+  va_start(args, fmt);
+  fprintf(stderr, "[ERROR] ");
+  vfprintf(stderr, fmt, args);
+  va_end(args);
+}