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/**
* \file path_normalize.c
* \brief Removes any weirdness from a file system path string.
* \author Copyright (c) 2013 Jason Perkins and the Premake project
*/
#include "premake.h"
#include <string.h>
int path_normalize(lua_State* L)
{
char buffer[0x4000];
char* src;
char* dst;
char last;
const char* path = luaL_checkstring(L, 1);
strcpy(buffer, path);
src = buffer;
dst = buffer;
last = '\0';
while (*src != '\0') {
char ch = (*src);
/* make sure we're using '/' for all separators */
if (ch == '\\') {
ch = '/';
}
/* add to the result, filtering out duplicate slashes */
if (ch != '/' || last != '/') {
*(dst++) = ch;
}
/* ...except at the start of a string, for UNC paths */
if (src != buffer) {
last = (*src);
}
++src;
}
/* remove any trailing slashes */
for (--src; src > buffer && *src == '/'; --src) {
*src = '\0';
}
/* remove any leading "./" sequences */
src = buffer;
while (strncmp(src, "./", 2) == 0) {
src += 2;
}
*dst = '\0';
lua_pushstring(L, src);
return 1;
}
/* Call the scripted path.normalize(), to allow for overrides */
void do_normalize(lua_State* L, char* buffer, const char* path)
{
int top = lua_gettop(L);
lua_getglobal(L, "path");
lua_getfield(L, -1, "normalize");
lua_pushstring(L, path);
lua_call(L, 1, 1);
path = luaL_checkstring(L, -1);
strcpy(buffer, path);
lua_settop(L, top);
}
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