Interactive tools: Escape control character for Unicode output
[platform/upstream/libxkbcommon.git] / tools / tools-common.c
index 6e397c2..a94466c 100644 (file)
 
 #include "config.h"
 
+#include <ctype.h>
+#include <errno.h>
 #include <limits.h>
 #include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
-#ifdef _MSC_VER
+#ifdef _WIN32
 #include <io.h>
 #include <windows.h>
 #else
@@ -96,7 +100,17 @@ tools_print_keycode_state(struct xkb_state *state,
         xkb_compose_state_get_utf8(compose_state, s, sizeof(s));
     else
         xkb_state_key_get_utf8(state, keycode, s, sizeof(s));
-    printf("unicode [ %s ] ", s);
+    /* HACK: escape single control characters from C0 set using the
+    * Unicode codepoint convention. Ideally we would like to escape
+    * any non-printable character in the string.
+    */
+    if (!*s) {
+        printf("unicode [   ] ");
+    } else if (strlen(s) == 1 && (*s <= 0x1F || *s == 0x7F)) {
+        printf("unicode [ U+%04hX ] ", *s);
+    } else {
+        printf("unicode [ %s ] ", s);
+    }
 
     layout = xkb_state_key_get_layout(state, keycode);
     printf("layout [ %s (%d) ] ",
@@ -157,7 +171,7 @@ tools_print_state_changes(enum xkb_state_component changed)
     printf("]\n");
 }
 
-#ifdef _MSC_VER
+#ifdef _WIN32
 void
 tools_disable_stdin_echo(void)
 {
@@ -197,4 +211,43 @@ tools_enable_stdin_echo(void)
         (void) tcsetattr(STDIN_FILENO, TCSADRAIN, &termios);
     }
 }
+
 #endif
+
+int
+tools_exec_command(const char *prefix, int real_argc, char **real_argv)
+{
+    char *argv[64] = {NULL};
+    char executable[PATH_MAX];
+    const char *command;
+    int rc;
+
+    if (((size_t)real_argc >= ARRAY_SIZE(argv))) {
+        fprintf(stderr, "Too many arguments\n");
+        return EXIT_INVALID_USAGE;
+    }
+
+    command = real_argv[0];
+
+    rc = snprintf(executable, sizeof(executable),
+                  "%s/%s-%s", LIBXKBCOMMON_TOOL_PATH, prefix, command);
+    if (rc < 0 || (size_t) rc >= sizeof(executable)) {
+        fprintf(stderr, "Failed to assemble command\n");
+        return EXIT_FAILURE;
+    }
+
+    argv[0] = executable;
+    for (int i = 1; i < real_argc; i++)
+        argv[i] = real_argv[i];
+
+    execv(executable, argv);
+    if (errno == ENOENT) {
+        fprintf(stderr, "Command '%s' is not available\n", command);
+        return EXIT_INVALID_USAGE;
+    } else {
+        fprintf(stderr, "Failed to execute '%s' (%s)\n",
+                command, strerror(errno));
+    }
+
+    return EXIT_FAILURE;
+}