ictable.c

IBE是一种非对称密码技术

/* Copyright 2003-2006, Voltage Security, all rights reserved.
 */

#include "vibe.h"
#include "environment.h"
#include "base.h"
#include "libctx.h"
#include "icTable.h"
#include "errorctx.h"

int icTableCreate (
   icTable **entry,
   VoltLibCtx *libCtx
   )
{
  VOLT_DECLARE_FNCT_LINE (fnctLine)

  VOLT_SET_FNCT_LINE (fnctLine)
  *entry = (icTable *)Z3Malloc (sizeof (icTable));
  if ((*entry) != (icTable *)0)
  {
    Z2Memset (*entry, 0, sizeof (icTable));
    return (0);
  }

  VOLT_LOG_ERROR (
    (VtLibCtx)libCtx, VT_ERROR_MEMORY, VT_ERROR_TYPE_PRIMARY, fnctLine,
    "icTableCreate", (char *)0)

  return (VT_ERROR_MEMORY);
}

void icTableFree (
   icTable **table,
   VoltLibCtx *libCtx
   )
{
  icTable *currentTable, *nextTable;

  /* Anything to free?
   */
  if (table == (icTable **)0)
    return;

  currentTable = *table;
  while (currentTable != (icTable *)0)
  {
    nextTable = (icTable *)(currentTable->next);
    Z2Free (currentTable->key);
    Z2Free (currentTable->value);
    Z2Free (currentTable);
    currentTable = nextTable;
  }

  *table = (icTable *)0;
}

int icTablePut (
   icTable *table,
   char *key,
   char *value,
   VoltLibCtx *libCtx
   )
{
  int status;
  icTable *currentTable, *lastTable;
  icTable *newTable = (icTable *)0;
  VOLT_DECLARE_FNCT_LINE (fnctLine)

  do
  {
    /* Cycle through the Table looking for the entry. If found just replace
     * the value.
     */
    currentTable = table;
    do
    {
      if (Z2Strcmp (currentTable->key, key) == 0)
      {
        Z2Free (currentTable->value);
        currentTable->value = (char *)0;

        VOLT_SET_FNCT_LINE (fnctLine)
        status = Z2Strdup (value, &(currentTable->value));

        break;
      }

      lastTable = currentTable;
      currentTable = (icTable *)(currentTable->next);
    } while (currentTable != (icTable *)0);

    /* If currentTable is not NULL, either we found a matching key and
     * replaced the value, or there was an error. Either way, we're
     * done. If currentTable is NULL, we went through the list without
     * a match, we need to build a new table and place it at the end of
     * the link list.
     */
    if (currentTable != (icTable *)0)
      break;

    VOLT_SET_FNCT_LINE (fnctLine)
    status = icTableCreate (&newTable, libCtx);
    if (status != 0)
      break;

    VOLT_SET_FNCT_LINE (fnctLine)
    status = Z2Strdup (key, &(newTable->key));
    if (status != 0)
      break;

    VOLT_SET_FNCT_LINE (fnctLine)
    status = Z2Strdup (value, &(newTable->value));
    if (status != 0)
      break;

    lastTable->next = (Pointer)newTable;

  } while (0);

  if (status == 0)
    return (0);

  /* If there was an error, free any memory we allocated.
   */
  icTableFree (&newTable, libCtx);

  VOLT_LOG_ERROR (
    (VtLibCtx)libCtx, status, 0, fnctLine, "icTablePut", (char *)0)

  return (status);
}

void icTableGet (
   icTable *table,
   char *key,
   char **value,
   VoltLibCtx *libCtx
   )
{
  icTable *currentTable = table;

  *value = (char *)0;

  /* Go through the Table checking to see if the keys match.
   */
  while (currentTable != (icTable *)0)
  {
    if (Z2Strcmp (currentTable->key, key) == 0)
    {
      *value = currentTable->value;
      return;
    }
    currentTable = (icTable *)(currentTable->next);
  }
}