cgiparse.c

来自「ICETEK-DM642-EDUlabv1.3.rar」· C语言 代码 · 共 75 行

//--------------------------------------------------------------------------
// IP Stack CGI Demonstration Program
//--------------------------------------------------------------------------
// cgiparse.c
//
// Basic CGI Functions
//
// Author: Michael A. Denio
//         Adam K. Keys
//
// Copyright 2001 by Texas Instruments Inc.
//-------------------------------------------------------------------------
#include "c:\ti\c6000\ndk\inc\netmain.h"

//
// cgiParseVars()
//
// Reads input from a CGI post operation in pointed to by PostIn and
// returns in sequence a pointer the name and then the value of each
// post entry. This function modifies the data in PostIn. It also
// returns the current parsing position in the variable pParseIndex.
// The parse index must be set to 0 on initial call.
//
char *cgiParseVars(char PostIn[], int *pParseIndex )
{
  int  out;
  int  in;
  char hexch;
  char hexval[3];
  int start;
  char ch;

  // Get the current parse index. On the first call, it
  // must be zero.
  in = *pParseIndex;

  hexval[2] = '\0';
  if( in == 0 )
    out = 0;
  else if( in == -1 )
    return NULL;
  else
    out = ++in;

  start = in;
  while (((ch = PostIn[in]) != '=') && (ch != '&') && (ch != '\0'))
  {
    if (ch == '+')
      PostIn[out++] = ' ';
    else if (ch == '%')
    {
      hexval[0] = PostIn[++in];
      hexval[1] = PostIn[++in];
      hexch = (char) strtol(hexval, NULL, 16);
      PostIn[out++] = hexch;
     }
     else
      PostIn[out++] = ch;
    in++;
  }

  // If we got to the end of the string, set the parse index to -1
  if( ch == '\0' )
      in = -1;

  // Null terminate the result string
  PostIn[out++] = '\0';

  // Save the value of the current parse index
  *pParseIndex = in;

  // Return a pointer to the start of the result string
  return (&PostIn[start]);
}