/* Shared general utility routines for GDB, the GNU debugger.

  Copyright (C) 1986-2024 Free Software Foundation, Inc.

  This file is part of GDB.

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 3 of the License, or
  (at your option) any later version.

  This program 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 for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "common-utils.h"
#include "host-defs.h"
#include "gdbsupport/gdb-safe-ctype.h"
#include "gdbsupport/gdb-xfree.h"

void *
xzalloc (size_t size)
{
 return xcalloc (1, size);
}

/* Like asprintf/vasprintf but get an internal_error if the call
  fails. */

gdb::unique_xmalloc_ptr<char>
xstrprintf (const char *format, ...)
{
 va_list args;

 va_start (args, format);
 gdb::unique_xmalloc_ptr<char> ret = xstrvprintf (format, args);
 va_end (args);
 return ret;
}

gdb::unique_xmalloc_ptr<char>
xstrvprintf (const char *format, va_list ap)
{
 char *ret = NULL;
 int status = vasprintf (&ret, format, ap);

 /* NULL is returned when there was a memory allocation problem, or
    any other error (for instance, a bad format string).  A negative
    status (the printed length) with a non-NULL buffer should never
    happen, but just to be sure.  */
 if (ret == NULL || status < 0)
   internal_error (_("vasprintf call failed"));
 return gdb::unique_xmalloc_ptr<char> (ret);
}

int
xsnprintf (char *str, size_t size, const char *format, ...)
{
 va_list args;
 int ret;

 va_start (args, format);
 ret = vsnprintf (str, size, format, args);
 gdb_assert (ret < size);
 va_end (args);

 return ret;
}

/* See documentation in common-utils.h.  */

std::string
string_printf (const char* fmt, ...)
{
 va_list vp;
 int size;

 va_start (vp, fmt);
 size = vsnprintf (NULL, 0, fmt, vp);
 va_end (vp);

 std::string str (size, '\0');

 /* C++11 and later guarantee std::string uses contiguous memory and
    always includes the terminating '\0'.  */
 va_start (vp, fmt);
 vsprintf (&str[0], fmt, vp);  /* ARI: vsprintf */
 va_end (vp);

 return str;
}

/* See documentation in common-utils.h.  */

std::string
string_vprintf (const char* fmt, va_list args)
{
 va_list vp;
 size_t size;

 va_copy (vp, args);
 size = vsnprintf (NULL, 0, fmt, vp);
 va_end (vp);

 std::string str (size, '\0');

 /* C++11 and later guarantee std::string uses contiguous memory and
    always includes the terminating '\0'.  */
 vsprintf (&str[0], fmt, args); /* ARI: vsprintf */

 return str;
}


/* See documentation in common-utils.h.  */

std::string &
string_appendf (std::string &str, const char *fmt, ...)
{
 va_list vp;

 va_start (vp, fmt);
 string_vappendf (str, fmt, vp);
 va_end (vp);

 return str;
}


/* See documentation in common-utils.h.  */

std::string &
string_vappendf (std::string &str, const char *fmt, va_list args)
{
 va_list vp;
 int grow_size;

 va_copy (vp, args);
 grow_size = vsnprintf (NULL, 0, fmt, vp);
 va_end (vp);

 size_t curr_size = str.size ();
 str.resize (curr_size + grow_size);

 /* C++11 and later guarantee std::string uses contiguous memory and
    always includes the terminating '\0'.  */
 vsprintf (&str[curr_size], fmt, args); /* ARI: vsprintf */

 return str;
}

char *
savestring (const char *ptr, size_t len)
{
 char *p = (char *) xmalloc (len + 1);

 memcpy (p, ptr, len);
 p[len] = 0;
 return p;
}

/* See documentation in common-utils.h.  */

std::string
extract_string_maybe_quoted (const char **arg)
{
 bool squote = false;
 bool dquote = false;
 bool bsquote = false;
 std::string result;
 const char *p = *arg;

 /* Find the start of the argument.  */
 p = skip_spaces (p);

 /* Parse p similarly to gdb_argv buildargv function.  */
 while (*p != '\0')
   {
     if (ISSPACE (*p) && !squote && !dquote && !bsquote)
       break;
     else
       {
         if (bsquote)
           {
             bsquote = false;
             result += *p;
           }
         else if (*p == '\\')
           bsquote = true;
         else if (squote)
           {
             if (*p == '\'')
               squote = false;
             else
               result += *p;
           }
         else if (dquote)
           {
             if (*p == '"')
               dquote = false;
             else
               result += *p;
           }
         else
           {
             if (*p == '\'')
               squote = true;
             else if (*p == '"')
               dquote = true;
             else
               result += *p;
           }
         p++;
       }
   }

 *arg = p;
 return result;
}

/* See gdbsupport/common-utils.h.  */

std::string
make_quoted_string (const char *str)
{
 gdb_assert (str != nullptr);

 std::string result;

 for (; *str != '\0'; ++str)
   {
     const char ch = *str;

     if (strchr ("\"' \t\n", ch) != nullptr)
      result.push_back ('\\');
     result.push_back (ch);
   }

 return result;
}

/* The bit offset of the highest byte in a ULONGEST, for overflow
  checking.  */

#define HIGH_BYTE_POSN ((sizeof (ULONGEST) - 1) * HOST_CHAR_BIT)

/* True (non-zero) iff DIGIT is a valid digit in radix BASE,
  where 2 <= BASE <= 36.  */

static int
is_digit_in_base (unsigned char digit, int base)
{
 if (!ISALNUM (digit))
   return 0;
 if (base <= 10)
   return (ISDIGIT (digit) && digit < base + '0');
 else
   return (ISDIGIT (digit) || TOLOWER (digit) < base - 10 + 'a');
}

static int
digit_to_int (unsigned char c)
{
 if (ISDIGIT (c))
   return c - '0';
 else
   return TOLOWER (c) - 'a' + 10;
}

/* As for strtoul, but for ULONGEST results.  */

ULONGEST
strtoulst (const char *num, const char **trailer, int base)
{
 unsigned int high_part;
 ULONGEST result;
 int minus = 0;
 int i = 0;

 /* Skip leading whitespace.  */
 while (ISSPACE (num[i]))
   i++;

 /* Handle prefixes.  */
 if (num[i] == '+')
   i++;
 else if (num[i] == '-')
   {
     minus = 1;
     i++;
   }

 if (base == 0 || base == 16)
   {
     if (num[i] == '0' && (num[i + 1] == 'x' || num[i + 1] == 'X'))
       {
         i += 2;
         if (base == 0)
           base = 16;
       }
   }

 if (base == 0 && num[i] == '0')
   base = 8;

 if (base == 0)
   base = 10;

 if (base < 2 || base > 36)
   {
     errno = EINVAL;
     return 0;
   }

 result = high_part = 0;
 for (; is_digit_in_base (num[i], base); i += 1)
   {
     result = result * base + digit_to_int (num[i]);
     high_part = high_part * base + (unsigned int) (result >> HIGH_BYTE_POSN);
     result &= ((ULONGEST) 1 << HIGH_BYTE_POSN) - 1;
     if (high_part > 0xff)
       {
         errno = ERANGE;
         result = ~ (ULONGEST) 0;
         high_part = 0;
         minus = 0;
         break;
       }
   }

 if (trailer != NULL)
   *trailer = &num[i];

 result = result + ((ULONGEST) high_part << HIGH_BYTE_POSN);
 if (minus)
   return -result;
 else
   return result;
}

/* See documentation in common-utils.h.  */

char *
skip_spaces (char *chp)
{
 if (chp == NULL)
   return NULL;
 while (*chp && ISSPACE (*chp))
   chp++;
 return chp;
}

/* A const-correct version of the above.  */

const char *
skip_spaces (const char *chp)
{
 if (chp == NULL)
   return NULL;
 while (*chp && ISSPACE (*chp))
   chp++;
 return chp;
}

/* See documentation in common-utils.h.  */

const char *
skip_to_space (const char *chp)
{
 if (chp == NULL)
   return NULL;
 while (*chp && !ISSPACE (*chp))
   chp++;
 return chp;
}

/* See documentation in common-utils.h.  */

char *
skip_to_space (char *chp)
{
 return (char *) skip_to_space ((const char *) chp);
}

/* See gdbsupport/common-utils.h.  */

void
free_vector_argv (std::vector<char *> &v)
{
 for (char *el : v)
   xfree (el);

 v.clear ();
}

/* See gdbsupport/common-utils.h.  */

ULONGEST
align_up (ULONGEST v, int n)
{
 /* Check that N is really a power of two.  */
 gdb_assert (n && (n & (n-1)) == 0);
 return (v + n - 1) & -n;
}

/* See gdbsupport/common-utils.h.  */

ULONGEST
align_down (ULONGEST v, int n)
{
 /* Check that N is really a power of two.  */
 gdb_assert (n && (n & (n-1)) == 0);
 return (v & -n);
}

/* See gdbsupport/common-utils.h.  */

int
fromhex (int a)
{
 if (a >= '0' && a <= '9')
   return a - '0';
 else if (a >= 'a' && a <= 'f')
   return a - 'a' + 10;
 else if (a >= 'A' && a <= 'F')
   return a - 'A' + 10;
 else
   error (_("Invalid hex digit %d"), a);
}

/* See gdbsupport/common-utils.h.  */

int
hex2bin (const char *hex, gdb_byte *bin, int count)
{
 int i;

 for (i = 0; i < count; i++)
   {
     if (hex[0] == 0 || hex[1] == 0)
       {
         /* Hex string is short, or of uneven length.
            Return the count that has been converted so far.  */
         return i;
       }
     *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
     hex += 2;
   }
 return i;
}

/* See gdbsupport/common-utils.h.  */

gdb::byte_vector
hex2bin (const char *hex)
{
 size_t bin_len = strlen (hex) / 2;
 gdb::byte_vector bin (bin_len);

 hex2bin (hex, bin.data (), bin_len);

 return bin;
}

/* See gdbsupport/common-utils.h.  */

std::string
bytes_to_string (gdb::array_view<const gdb_byte> bytes)
{
 std::string ret;

 for (size_t i = 0; i < bytes.size (); i++)
   {
     if (i == 0)
       ret += string_printf ("%02x", bytes[i]);
     else
       ret += string_printf (" %02x", bytes[i]);
   }

 return ret;
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.