Win32: unify environment function names

Environment helper functions use random naming ('env' prefix or suffix or
both, with or without '_'). Change to POSIX naming scheme ('env' suffix,
no '_').

Env_setenv has more in common with putenv than setenv. Change to do_putenv.

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Stepan Kasal <kasal@ucw.cz>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

compat/mingw.c

@@ -899,7 +899,7 @@ static char *path_lookup(const char *cmd, char **path, int exe_only)
 	return prog;
 }
 
-static int env_compare(const void *a, const void *b)
+static int compareenv(const void *a, const void *b)
 {
 	char *const *ea = a;
 	char *const *eb = b;
@@ -993,7 +993,7 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
 		/* environment must be sorted */
 		sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
 		memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
-		qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
+		qsort(sorted_env, count, sizeof(*sorted_env), compareenv);
 
 		/* create environment block from temporary environment */
 		for (e = sorted_env; *e; e++) {
@@ -1194,7 +1194,7 @@ void free_environ(char **env)
 	free(env);
 }
 
-static int lookup_env(char **env, const char *name, size_t nmln)
+static int lookupenv(char **env, const char *name, size_t nmln)
 {
 	int i;
 
@@ -1209,10 +1209,10 @@ static int lookup_env(char **env, const char *name, size_t nmln)
 /*
  * If name contains '=', then sets the variable, otherwise it unsets it
  */
-static char **env_setenv(char **env, const char *name)
+static char **do_putenv(char **env, const char *name)
 {
 	char *eq = strchrnul(name, '=');
-	int i = lookup_env(env, name, eq-name);
+	int i = lookupenv(env, name, eq-name);
 
 	if (i < 0) {
 		if (*eq) {
@@ -1243,7 +1243,7 @@ char **make_augmented_environ(const char *const *vars)
 
 	while (*vars) {
 		const char *v = *vars++;
-		env = env_setenv(env, strchr(v, '=') ? xstrdup(v) : v);
+		env = do_putenv(env, strchr(v, '=') ? xstrdup(v) : v);
 	}
 	return env;
 }
@@ -1263,7 +1263,7 @@ char *mingw_getenv(const char *name)
 
 int mingw_putenv(const char *namevalue)
 {
-	environ = env_setenv(environ, namevalue);
+	environ = do_putenv(environ, namevalue);
 	return 0;
 }