7 files changed, 166 insertions, 0 deletions
diff --git a/src/detection/libc/libc.h b/src/detection/libc/libc.h
new file mode 100644
index 0000000..f2718e8
--- /dev/null
+++ b/src/detection/libc/libc.h
@@ -0,0 +1,10 @@
+#pragma once
+
+#include "fastfetch.h"
+
+typedef struct FFLibcResult {
+    const char* name;
+    const char* version;
+} FFLibcResult;
+
+const char* ffDetectLibc(FFLibcResult* result);
diff --git a/src/detection/libc/libc_android.c b/src/detection/libc/libc_android.c
new file mode 100644
index 0000000..2aec4ed
--- /dev/null
+++ b/src/detection/libc/libc_android.c
@@ -0,0 +1,24 @@
+#include "libc.h"
+
+#define FF_STR_INDIR(x) #x
+#define FF_STR(x) FF_STR_INDIR(x)
+
+#include <features.h>
+
+const char* ffDetectLibc(FFLibcResult* result) {
+#if __ANDROID_NDK__
+    result->name = "ndk-bionic";
+    result->version = FF_STR(__NDK_MAJOR__) "." FF_STR(__NDK_MINOR__) "." FF_STR(__NDK_BUILD__)
+
+    #if __NDK_BETA__
+        "-beta" FF_STR(__NDK_BETA__)
+    #elif __NDK_CANARY__
+        "-canary"
+    #endif
+
+        ;
+    return NULL;
+#else
+    return "Unknown Android libc";
+#endif
+}
diff --git a/src/detection/libc/libc_apple.c b/src/detection/libc/libc_apple.c
new file mode 100644
index 0000000..07ca2b5
--- /dev/null
+++ b/src/detection/libc/libc_apple.c
@@ -0,0 +1,12 @@
+#include "libc.h"
+
+const char* ffDetectLibc(FFLibcResult* result) {
+    result->name = "libSystem";
+
+#ifdef FF_LIBSYSTEM_VERSION
+    result->version = FF_LIBSYSTEM_VERSION;
+#else
+    result->version = NULL;
+#endif
+    return NULL;
+}
diff --git a/src/detection/libc/libc_bsd.c b/src/detection/libc/libc_bsd.c
new file mode 100644
index 0000000..bd73165
--- /dev/null
+++ b/src/detection/libc/libc_bsd.c
@@ -0,0 +1,20 @@
+#include "libc.h"
+
+const char* ffDetectLibc(FFLibcResult* result) {
+    result->name = "Unknown";
+    result->version = NULL;
+
+#ifdef __DragonFly__ // We define `__FreeBSD__` on DragonFly BSD for simplification
+    result->name = "DF";
+    #ifdef FF_DF_VERSION
+    result->version = FF_DF_VERSION;
+    #endif
+#elif __FreeBSD__
+    result->name = "FBSD";
+    #ifdef FF_FBSD_VERSION
+    result->version = FF_FBSD_VERSION;
+    #endif
+#endif
+
+    return NULL;
+}
diff --git a/src/detection/libc/libc_linux.c b/src/detection/libc/libc_linux.c
new file mode 100644
index 0000000..53186a3
--- /dev/null
+++ b/src/detection/libc/libc_linux.c
@@ -0,0 +1,25 @@
+#include "libc.h"
+
+#define FF_STR_INDIR(x) #x
+#define FF_STR(x) FF_STR_INDIR(x)
+
+#include <features.h>
+
+const char* ffDetectLibc(FFLibcResult* result) {
+#ifdef __UCLIBC__
+    result->name = "uClibc";
+    result->version = FF_STR(__UCLIBC_MAJOR__) "." FF_STR(__UCLIBC_MINOR__) "." FF_STR(__UCLIBC_SUBLEVEL__);
+#elif defined(__GNU_LIBRARY__)
+    result->name = "glibc";
+    result->version = FF_STR(__GLIBC__) "." FF_STR(__GLIBC_MINOR__);
+#else
+    result->name = "musl";
+    #ifdef FF_MUSL_VERSION
+    result->version = FF_MUSL_VERSION;
+    #else
+    result->version = NULL;
+    #endif
+#endif
+
+    return NULL;
+}
diff --git a/src/detection/libc/libc_nosupport.c b/src/detection/libc/libc_nosupport.c
new file mode 100644
index 0000000..e4687b0
--- /dev/null
+++ b/src/detection/libc/libc_nosupport.c
@@ -0,0 +1,7 @@
+#include "libc.h"
+
+const char* ffDetectLibc(FFLibcResult* result) {
+    result->name = "Unknown";
+    result->version = NULL;
+    return NULL;
+}
diff --git a/src/detection/libc/libc_windows.cpp b/src/detection/libc/libc_windows.cpp
new file mode 100644
index 0000000..c94062a
--- /dev/null
+++ b/src/detection/libc/libc_windows.cpp
@@ -0,0 +1,68 @@
+extern "C" {
+#include "libc.h"
+}
+
+#ifdef __MINGW32__
+    #include <_mingw.h>
+#endif
+
+template <uint32_t Major, uint32_t Minor>
+class version_t {
+    constexpr static auto buflen() noexcept {
+        unsigned int len = 2; // "."
+        if (Major == 0) {
+            len++;
+        } else {
+            for (auto n = Major; n; len++, n /= 10);
+        }
+
+        if (Minor == 0) {
+            len++;
+        } else {
+            for (auto n = Minor; n; len++, n /= 10);
+        }
+        return len;
+    }
+
+    char buf[buflen()] = {};
+
+  public:
+    constexpr version_t() noexcept {
+        auto ptr = buf + buflen();
+        *--ptr = '\0';
+
+        if (Minor == 0) {
+            *--ptr = '0';
+        } else {
+            for (auto n = Minor; n; n /= 10) {
+                *--ptr = "0123456789"[n % 10];
+            }
+        }
+        *--ptr = '.';
+        if (Major == 0) {
+            *--ptr = '0';
+        } else {
+            for (auto n = Major; n; n /= 10) {
+                *--ptr = "0123456789"[n % 10];
+            }
+        }
+    }
+
+    constexpr operator const char*() const {
+        return buf;
+    }
+};
+
+template <uint32_t Major, uint32_t Minor>
+constexpr version_t<Major, Minor> version;
+
+extern "C" const char* ffDetectLibc(FFLibcResult* result) {
+#ifdef _UCRT
+    result->name = "ucrt";
+#else
+    result->name = "msvcrt";
+#endif
+
+    result->version = version<(__MSVCRT_VERSION__ >> 8), (__MSVCRT_VERSION__ & 8)>;
+    return NULL;
+}