/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 *

 */

#include <ctype.h>

#include <string.h>

#include "ioUtils.hpp"

#include "IOBuf.hpp"

bool

scanInt(char** data, int* num) {

  *num = 0;

  // Skip whitespace

  while ((**data != 0) && (isspace(**data))) {

    ++*data;

  }

  if (**data == 0) {

    return false;

  }

  while ((**data != 0) && (!isspace(**data))) {

    char cur = **data;

    if ((cur < '0') || (cur > '9')) {

      return false;

    }

    *num *= 10;

    *num += cur - '0';

    ++*data;

  }

  return true;

}

bool

scanUnsignedLong(char** data, unsigned long* num) {

  *num = 0;

  // Skip whitespace

  while ((**data != 0) && (isspace(**data))) {

    ++*data;

  }

  if (**data == 0) {

    return false;

  }

  while ((**data != 0) && (!isspace(**data))) {

    char cur = **data;

    if ((cur < '0') || (cur > '9')) {

      return false;

    }

    *num *= 10;

    *num += cur - '0';

    ++*data;

  }

  return true;

}

bool

charToNibble(char ascii, int* value) {

  if (ascii >= '0' && ascii <= '9') {

    *value = ascii - '0';

    return true;

  } else if (ascii >= 'A' && ascii <= 'F') {

    *value = 10 + ascii - 'A';

    return true;

  } else if (ascii >= 'a' && ascii <= 'f') {

    *value = 10 + ascii - 'a';

    return true;

  }

  return false;

}

bool

scanAddress(char** data, unsigned long* addr) {

  *addr = 0;

  // Skip whitespace

  while ((**data != 0) && (isspace(**data))) {

    ++*data;

  }

  if (**data == 0) {

    return false;

  }

  if (strncmp(*data, "0x", 2) != 0) {

    return false;

  }

  *data += 2;

  while ((**data != 0) && (!isspace(**data))) {

    int val;

    bool res = charToNibble(**data, &val);

    if (!res) {

      return false;

    }

    *addr <<= 4;

    *addr |= val;

    ++*data;

  }

  return true;

}

bool

scanAndSkipBinEscapeChar(char** data) {

  // Skip whitespace

  while ((**data != 0) && (isspace(**data))) {

    ++*data;

  }

  if (!IOBuf::isBinEscapeChar(**data)) {

    return false;

  }

  ++*data;

  return true;

}

bool

scanBinUnsignedLong(char** data, unsigned long* num) {

  *num = 0;

  for (int i = 0; i < 4; i++) {

    unsigned char val = (unsigned char) **data;

    *num = (*num << 8) | val;

    ++*data;

  }

  return true;

}