Add dummy command line parser

include/kernaux/cmdline.h

@@ -1,10 +1,26 @@
 #ifndef KERNAUX_INCLUDED_CMDLINE
 #define KERNAUX_INCLUDED_CMDLINE 1
 
+#include <kernaux/stdlib.h>
+
+#define KERNAUX_CMDLINE_ERROR_MSG_SIZE_MAX 256
+#define KERNAUX_CMDLINE_ERROR_MSG_SLEN_MAX \
+  (KERNAUX_CMDLINE_ERROR_MSG_SIZE_MAX - 1)
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+kernaux_bool kernaux_cmdline_parse(
+    const char *cmdline,
+    char *error_msg,
+    unsigned int *argc,
+    char **argv,
+    char *buffer,
+    unsigned int argv_count_max,
+    unsigned int arg_size_max
+);
+
 #ifdef __cplusplus
 }
 #endif

src/cmdline.c

@@ -1,3 +1,35 @@
 #include "config.h"
 
 #include <kernaux/cmdline.h>
+
+kernaux_bool kernaux_cmdline_parse(
+    const char *const cmdline,
+    char *error_msg,
+    unsigned int *const argc,
+    char **argv,
+    char *buffer,
+    const unsigned int argv_count_max,
+    const unsigned int arg_size_max
+) {
+    if (
+        cmdline == KERNAUX_NULL ||
+        error_msg == KERNAUX_NULL ||
+        argc == KERNAUX_NULL ||
+        argv == KERNAUX_NULL ||
+        argv_count_max == 0 ||
+        arg_size_max == 0
+    ) {
+        return KERNAUX_FALSE;
+    }
+
+    kernaux_memset(error_msg, '\0', KERNAUX_CMDLINE_ERROR_MSG_SIZE_MAX);
+    *argc = 0;
+
+    for (unsigned int index = 0; index < argv_count_max; ++index) {
+        argv[index] = KERNAUX_NULL;
+    }
+
+    kernaux_memset(buffer, '\0', argv_count_max * arg_size_max);
+
+    return KERNAUX_TRUE;
+}

tests/test_cmdline.c

@@ -1,6 +1,26 @@
 #include <kernaux/cmdline.h>
 
+#include <assert.h>
+
+static const unsigned int ARGV_COUNT_MAX = 1024;
+static const unsigned int ARG_SIZE_MAX = 4096;
+
 int main()
 {
+    char error_msg[KERNAUX_CMDLINE_ERROR_MSG_SIZE_MAX];
+    unsigned int argc;
+    char *argv[ARGV_COUNT_MAX];
+    char buffer[ARGV_COUNT_MAX * ARG_SIZE_MAX];
+
+    assert(kernaux_cmdline_parse(
+        "",
+        error_msg,
+        &argc,
+        argv,
+        buffer,
+        ARGV_COUNT_MAX,
+        ARG_SIZE_MAX
+    ));
+
     return 0;
 }