fpm_os -> fpm_environment to enable single-file build

src/fpm_environment.c

@@ -0,0 +1,38 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+/// @brief Set environment variable using the C standard library
+/// @param envname: points to a string containing the name of an environment variable to be added or altered.
+/// @param envval: points to the value the environment variable is set to
+/// @param overwrite: flag to determine whether an old value should be overwritten
+/// @return success flag, 0 on successful execution
+int c_setenv(const char *envname, const char *envval, int overwrite) {
+#ifndef _WIN32
+   return setenv(envname, envval, overwrite);
+#else
+   int errcode = 0;
+   if(!overwrite) {
+       size_t envsize = 0;
+       errcode = getenv_s(&envsize, NULL, 0, envname);
+       if (errcode || envsize) return errcode;
+   }
+   return _putenv_s(envname, envval);
+#endif
+}
+
+/// @brief Delete environment variable using the C standard library
+/// @param envname: points to a string containing the name of an environment variable.
+/// @return success flag, 0 on successful execution
+int c_unsetenv(const char *envname) {
+#ifndef _WIN32
+   return unsetenv(envname);
+#else
+   char* str = malloc(64*sizeof(char));
+   *str = '\0';
+   int errcode = _putenv_s(envname,str);
+   // Windows returns a non-0 code when setting empty variable
+   if (errcode==-1) errcode=0;
+   free(str);
+   return errcode;
+#endif
+}

src/fpm_os.c

@@ -16,40 +16,5 @@ char* c_realpath(char* path, char* resolved_path, int maxLength) {
 #endif
 }
 
-/// @brief Set environment variable using the C standard library
-/// @param envname: points to a string containing the name of an environment variable to be added or altered.
-/// @param envval: points to the value the environment variable is set to
-/// @param overwrite: flag to determine whether an old value should be overwritten
-/// @return success flag, 0 on successful execution
-int c_setenv(const char *envname, const char *envval, int overwrite) {
-#ifndef _WIN32
-   return setenv(envname, envval, overwrite);
-#else
-   int errcode = 0;
-   if(!overwrite) {
-       size_t envsize = 0;
-       errcode = getenv_s(&envsize, NULL, 0, envname);
-       if (errcode || envsize) return errcode;
-   }
-   return _putenv_s(envname, envval);
-#endif
-}
-
-/// @brief Delete environment variable using the C standard library
-/// @param envname: points to a string containing the name of an environment variable.
-/// @return success flag, 0 on successful execution
-int c_unsetenv(const char *envname) {
-#ifndef _WIN32
-   return unsetenv(envname);
-#else
-   char* str = malloc(64*sizeof(char));
-   *str = '\0';
-   int errcode = _putenv_s(envname,str);
-   // Windows returns a non-0 code when setting empty variable
-   if (errcode==-1) errcode=0;
-   free(str);
-   return errcode;
-#endif
-}