Add native and cross compiling CMake build support

2 files changed, 74 insertions, 0 deletions

diff --git a/tools/xpcat/CMakeLists.txt b/tools/xpcat/CMakeLists.txt
new file mode 100644
index 000000000..bb4d326f5
--- /dev/null
+++ b/tools/xpcat/CMakeLists.txt
@@ -0,0 +1,5 @@
+# build tools/xpcat internal executable
+
+add_executable(xpcat xpcat.c)
+
+# vim: ts=2 sts=2 sw=2 et
diff --git a/tools/xpcat/xpcat.c b/tools/xpcat/xpcat.c
new file mode 100644
index 000000000..c9d1abe73
--- /dev/null
+++ b/tools/xpcat/xpcat.c
@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void
+usage(const char *program)
+{
+  printf("Usage: %s -o outputfile FILE...\n", program);
+}
+
+int
+main(int argc, char *argv[])
+{
+  int i, ch;
+  const char *output = NULL;
+  FILE *infile = NULL;
+  FILE *outfile = NULL;
+
+  if (argc < 4) {
+    usage(argv[0]);
+    return EXIT_FAILURE;
+  }
+
+  for (i = 1; i < argc; i++) {
+    if (strcmp(argv[i], "-o") == 0) {
+      i++;
+      if (i < argc)
+        output = argv[i];
+      else
+        return EXIT_FAILURE;
+    }
+  }
+
+  if (output) {
+    outfile = fopen(output, "wb");
+    if (!outfile) {
+      fprintf(stderr, "[ERROR] unable to open output file: %s\n", output);
+      return EXIT_FAILURE;
+    }
+    setbuf(outfile, NULL);
+
+    for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-o") == 0) { i++; continue; }
+
+      infile = fopen(argv[i], "rb");
+      if (!infile) {
+        fprintf(stderr, "[ERROR] unable to open input file: %s\n", argv[i]);
+        return EXIT_FAILURE;
+      }
+      setbuf(infile, NULL);
+
+      while ((ch = getc(infile)) != EOF) {
+        if (putc(ch, outfile) == EOF) {
+          fprintf(stderr, "[ERROR] error writing output file: %s\n", output);
+          return EXIT_FAILURE;
+        }
+      }
+
+      fclose(infile);
+    }
+  }
+
+done:
+  fclose(outfile);
+
+  return EXIT_SUCCESS;
+}
+
+/* vim: set ts=2 sts=2 sw=2 et: */