/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2023 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/proc/ntspawn.h"

static inline int IsAlpha(int c) {
  return ('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z');
}

textwindows void mungentpath(char *path) {
  char *p;

  // turn colon into semicolon
  // unless it already looks like a dos path
  for (p = path; *p; ++p) {
    if (p[0] == ':' && p[1] != '\\') {
      p[0] = ';';
    }
  }

  // turn /c/... into c:\...
  p = path;
  if (p[0] == '/' && IsAlpha(p[1]) && p[2] == '/') {
    p[0] = p[1];
    p[1] = ':';
  }
  for (; *p; ++p) {
    if (p[0] == ';' && p[1] == '/' && IsAlpha(p[2]) && p[3] == '/') {
      p[1] = p[2];
      p[2] = ':';
    }
  }

  // turn slash into backslash
  for (p = path; *p; ++p) {
    if (*p == '/') {
      *p = '\\';
    }
  }
}