Initial commit

2026-06-06 18:15:42 -05:00
commit 7c1b0ab290
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+/* - | Copyright | ------------------------------------------------------------
+   Copyright (c) 2026 Randy Jordan
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+ * --------------------------------------------------------------------------*/
+#define DEBUG
+#include "../include/ci2.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* Platform-specific verification headers */
+#if defined(CI2_WINDOWS)
+  #include <windows.h> /* GetSystemInfo, SYSTEM_INFO */
+#elif defined(CI2_UNIX)
+  #include <sys/utsname.h>/* uname()                   — POSIX */
+  #include <unistd.h>     /* sysconf, _SC_* constants  — POSIX */
+#endif
+
+int
+main(int argc, char* argv[])
+{
+  (void)argc;
+  (void)argv;
+
+#if defined(CI2_WINDOWS)
+  printf("  Detected platform : Windows\n");
+
+  /*
+   * GetSystemInfo() is a Win32 API that fills SYSTEM_INFO.
+   * If _WIN32 were wrong this wouldn't compile or link.
+   */
+  SYSTEM_INFO si;
+  GetSystemInfo(&si);
+
+  printf("  Page size         : %lu bytes\n", (unsigned long)si.dwPageSize);
+  printf("  Processor count   : %lu\n", (unsigned long)si.dwNumberOfProcessors);
+  printf("  Processor arch    : %u\n", (unsigned)si.wProcessorArchitecture);
+
+  CI2_ASSERT(si.dwPageSize > 0);
+  CI2_ASSERT(si.dwNumberOfProcessors > 0);
+
+#elif defined(CI2_UNIX)
+  /*
+   * uname() fills a struct utsname with kernel name, release, machine, etc.
+   * This is a POSIX function — available on Linux, macOS, and all BSDs.
+   * It won't compile on Windows, proving our platform guard is correct.
+   */
+  struct utsname uts;
+  int ret = uname(&uts);
+  CI2_ASSERT(ret == 0);
+
+  printf("  Detected platform : Unix-like\n");
+  printf("  OS / sysname      : %s\n", uts.sysname);
+  printf("  Kernel release    : %s\n", uts.release);
+  printf("  Machine arch      : %s\n", uts.machine);
+  printf("  Node name         : %s\n", uts.nodename);
+
+  /*
+   * sysconf() is another POSIX function.
+   * _SC_PAGESIZE and _SC_NPROCESSORS_ONLN are available on Linux & macOS.
+   */
+  long page_size = sysconf(_SC_PAGESIZE);
+  long n_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+
+  printf("  Page size         : %ld bytes\n", page_size);
+  printf("  CPUs online       : %ld\n", n_cpus);
+
+  CI2_ASSERT(page_size > 0);
+  CI2_ASSERT(n_cpus > 0);
+
+  /* Sanity: page size is always a power of two */
+  CI2_ASSERT((page_size & (page_size - 1)) == 0);
+
+  #if defined(CI2_LINUX)
+  printf("  Sub-platform      : Linux\n");
+  CI2_ASSERT(strlen(uts.sysname) > 0);
+  #elif defined(CI2_MACOS)
+  printf("  Sub-platform      : macOS\n");
+  CI2_ASSERT(strlen(uts.sysname) > 0);
+  #endif
+
+#else
+  printf("  [FAIL] No platform macro was defined!\n");
+  return EXIT_FAILURE;
+#endif
+
+  return EXIT_SUCCESS;
+}