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Sourcecode: maxdb-buildtools version File versions

misc.c

/* misc - miscellaneous flex routines */

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Vern Paxson.
 * 
 * The United States Government has rights in this work pursuant
 * to contract no. DE-AC03-76SF00098 between the United States
 * Department of Energy and the University of California.
 *
 * Redistribution and use in source and binary forms with or without
 * modification are permitted provided that: (1) source distributions retain
 * this entire copyright notice and comment, and (2) distributions including
 * binaries display the following acknowledgement:  ``This product includes
 * software developed by the University of California, Berkeley and its
 * contributors'' in the documentation or other materials provided with the
 * distribution and in all advertising materials mentioning features or use
 * of this software.  Neither the name of the University nor the names of
 * its contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

/* $Header: /home/daffy/u0/vern/flex/RCS/misc.c,v 2.47 95/04/28 11:39:39 vern Exp $ */

#include "flexdef.h"


void action_define( defname, value )
char *defname;
int value;
      {
      char buf[MAXLINE];

      if ( (int) strlen( defname ) > MAXLINE / 2 )
            {
            format_pinpoint_message( _( "name \"%s\" ridiculously long" ), 
                  defname );
            return;
            }

      sprintf( buf, "#define %s %d\n", defname, value );
      add_action( buf );
      }


void add_action( new_text )
char *new_text;
      {
      int len = strlen( new_text );

      while ( len + action_index >= action_size - 10 /* slop */ )
            {
            int new_size = action_size * 2;

            if ( new_size <= 0 )
                  /* Increase just a little, to try to avoid overflow
                   * on 16-bit machines.
                   */
                  action_size += action_size / 8;
            else
                  action_size = new_size;

            action_array =
                  reallocate_character_array( action_array, action_size );
            }

      strcpy( &action_array[action_index], new_text );

      action_index += len;
      }


/* allocate_array - allocate memory for an integer array of the given size */

void *allocate_array( size, element_size )
int size;
size_t element_size;
      {
      register void *mem;
      size_t num_bytes = element_size * size;

      mem = flex_alloc( num_bytes );
      if ( ! mem )
            flexfatal(
                  _( "memory allocation failed in allocate_array()" ) );

      return mem;
      }


/* all_lower - true if a string is all lower-case */

int all_lower( str )
register char *str;
      {
      while ( *str )
            {
            if ( ! isascii( (Char) *str ) || ! islower( *str ) )
                  return 0;
            ++str;
            }

      return 1;
      }


/* all_upper - true if a string is all upper-case */

int all_upper( str )
register char *str;
      {
      while ( *str )
            {
            if ( ! isascii( (Char) *str ) || ! isupper( *str ) )
                  return 0;
            ++str;
            }

      return 1;
      }


/* bubble - bubble sort an integer array in increasing order
 *
 * synopsis
 *   int v[n], n;
 *   void bubble( v, n );
 *
 * description
 *   sorts the first n elements of array v and replaces them in
 *   increasing order.
 *
 * passed
 *   v - the array to be sorted
 *   n - the number of elements of 'v' to be sorted
 */

void bubble( v, n )
int v[], n;
      {
      register int i, j, k;

      for ( i = n; i > 1; --i )
            for ( j = 1; j < i; ++j )
                  if ( v[j] > v[j + 1] )  /* compare */
                        {
                        k = v[j];   /* exchange */
                        v[j] = v[j + 1];
                        v[j + 1] = k;
                        }
      }


/* check_char - checks a character to make sure it's within the range
 *          we're expecting.  If not, generates fatal error message
 *          and exits.
 */

void check_char( c )
int c;
      {
      if ( c >= CSIZE )
            lerrsf( _( "bad character '%s' detected in check_char()" ),
                  readable_form( c ) );

      if ( c >= csize )
            lerrsf(
            _( "scanner requires -8 flag to use the character %s" ),
                  readable_form( c ) );
      }



/* clower - replace upper-case letter to lower-case */

Char clower( c )
register int c;
      {
      return (Char) ((isascii( c ) && isupper( c )) ? tolower( c ) : c);
      }


/* copy_string - returns a dynamically allocated copy of a string */

char *copy_string( str )
register const char *str;
      {
      register const char *c1;
      register char *c2;
      char *copy;
      unsigned int size;

      /* find length */
      for ( c1 = str; *c1; ++c1 )
            ;

      size = (c1 - str + 1) * sizeof( char );
      copy = (char *) flex_alloc( size );

      if ( copy == NULL )
            flexfatal( _( "dynamic memory failure in copy_string()" ) );

      for ( c2 = copy; (*c2++ = *str++) != 0; )
            ;

      return copy;
      }


/* copy_unsigned_string -
 *    returns a dynamically allocated copy of a (potentially) unsigned string
 */

Char *copy_unsigned_string( str )
register Char *str;
      {
      register Char *c;
      Char *copy;

      /* find length */
      for ( c = str; *c; ++c )
            ;

      copy = allocate_Character_array( c - str + 1 );

      for ( c = copy; (*c++ = *str++) != 0; )
            ;

      return copy;
      }


/* cshell - shell sort a character array in increasing order
 *
 * synopsis
 *
 *   Char v[n];
 *   int n, special_case_0;
 *   cshell( v, n, special_case_0 );
 *
 * description
 *   Does a shell sort of the first n elements of array v.
 *   If special_case_0 is true, then any element equal to 0
 *   is instead assumed to have infinite weight.
 *
 * passed
 *   v - array to be sorted
 *   n - number of elements of v to be sorted
 */

void cshell( v, n, special_case_0 )
Char v[];
int n, special_case_0;
      {
      int gap, i, j, jg;
      Char k;

      for ( gap = n / 2; gap > 0; gap = gap / 2 )
            for ( i = gap; i < n; ++i )
                  for ( j = i - gap; j >= 0; j = j - gap )
                        {
                        jg = j + gap;

                        if ( special_case_0 )
                              {
                              if ( v[jg] == 0 )
                                    break;

                              else if ( v[j] != 0 && v[j] <= v[jg] )
                                    break;
                              }

                        else if ( v[j] <= v[jg] )
                              break;

                        k = v[j];
                        v[j] = v[jg];
                        v[jg] = k;
                        }
      }


/* dataend - finish up a block of data declarations */

void dataend()
      {
      if ( datapos > 0 )
            dataflush();

      /* add terminator for initialization; { for vi */
      outn( "    } ;\n" );

      dataline = 0;
      datapos = 0;
      }


/* dataflush - flush generated data statements */

void dataflush()
      {
      outc( '\n' );

      if ( ++dataline >= NUMDATALINES )
            {
            /* Put out a blank line so that the table is grouped into
             * large blocks that enable the user to find elements easily.
             */
            outc( '\n' );
            dataline = 0;
            }

      /* Reset the number of characters written on the current line. */
      datapos = 0;
      }


/* flexerror - report an error message and terminate */

void flexerror( msg )
const char msg[];
      {
      fprintf( stderr, "%s: %s\n", program_name, msg );
      flexend( 1 );
      }


/* flexfatal - report a fatal error message and terminate */

void flexfatal( msg )
const char msg[];
      {
      fprintf( stderr, _( "%s: fatal internal error, %s\n" ),
            program_name, msg );
      exit( 1 );
      }


/* htoi - convert a hexadecimal digit string to an integer value */

int htoi( str )
Char str[];
      {
      unsigned int result;

      (void) sscanf( (char *) str, "%x", &result );

      return result;
      }


/* lerrif - report an error message formatted with one integer argument */

void lerrif( msg, arg )
const char msg[];
int arg;
      {
      char errmsg[MAXLINE];
      (void) sprintf( errmsg, msg, arg );
      flexerror( errmsg );
      }


/* lerrsf - report an error message formatted with one string argument */

void lerrsf( msg, arg )
const char msg[], arg[];
      {
      char errmsg[MAXLINE];

      (void) sprintf( errmsg, msg, arg );
      flexerror( errmsg );
      }


/* line_directive_out - spit out a "#line" statement */

void line_directive_out( output_file, do_infile )
FILE *output_file;
int do_infile;
      {
      char directive[MAXLINE], filename[MAXLINE];
      char *s1, *s2, *s3;
      static char line_fmt[] = "#line %d \"%s\"\n";

      if ( ! gen_line_dirs )
            return;

      if ( (do_infile && ! infilename) || (! do_infile && ! outfilename) )
            /* don't know the filename to use, skip */
            return;

      s1 = do_infile ? infilename : outfilename;
      s2 = filename;
      s3 = &filename[sizeof( filename ) - 2];

      while ( s2 < s3 && *s1 )
            {
            if ( *s1 == '\\' )
                  /* Escape the '\' */
                  *s2++ = '\\';

            *s2++ = *s1++;
            }

      *s2 = '\0';

      if ( do_infile )
            sprintf( directive, line_fmt, linenum, filename );
      else
            {
            if ( output_file == stdout )
                  /* Account for the line directive itself. */
                  ++out_linenum;

            sprintf( directive, line_fmt, out_linenum, filename );
            }

      /* If output_file is nil then we should put the directive in
       * the accumulated actions.
       */
      if ( output_file )
            {
            fputs( directive, output_file );
            }
      else
            add_action( directive );
      }


/* mark_defs1 - mark the current position in the action array as
 *               representing where the user's section 1 definitions end
 *           and the prolog begins
 */
void mark_defs1()
      {
      defs1_offset = 0;
      action_array[action_index++] = '\0';
      action_offset = prolog_offset = action_index;
      action_array[action_index] = '\0';
      }


/* mark_prolog - mark the current position in the action array as
 *               representing the end of the action prolog
 */
void mark_prolog()
      {
      action_array[action_index++] = '\0';
      action_offset = action_index;
      action_array[action_index] = '\0';
      }


/* mk2data - generate a data statement for a two-dimensional array
 *
 * Generates a data statement initializing the current 2-D array to "value".
 */
void mk2data( value )
int value;
      {
      if ( datapos >= NUMDATAITEMS )
            {
            outc( ',' );
            dataflush();
            }

      if ( datapos == 0 )
            /* Indent. */
            out( "    " );

      else
            outc( ',' );

      ++datapos;

      out_dec( "%5d", value );
      }


/* mkdata - generate a data statement
 *
 * Generates a data statement initializing the current array element to
 * "value".
 */
void mkdata( value )
int value;
      {
      if ( datapos >= NUMDATAITEMS )
            {
            outc( ',' );
            dataflush();
            }

      if ( datapos == 0 )
            /* Indent. */
            out( "    " );
      else
            outc( ',' );

      ++datapos;

      out_dec( "%5d", value );
      }


/* myctoi - return the integer represented by a string of digits */

int myctoi( array )
char array[];
      {
      int val = 0;

      (void) sscanf( array, "%d", &val );

      return val;
      }


/* myesc - return character corresponding to escape sequence */

Char myesc( array )
Char array[];
      {
      Char c, esc_char;

      switch ( array[1] )
            {
            case 'b': return '\b';
            case 'f': return '\f';
            case 'n': return '\n';
            case 'r': return '\r';
            case 't': return '\t';

#if __STDC__
            case 'a': return '\a';
            case 'v': return '\v';
#else
            case 'a': return '\007';
            case 'v': return '\013';
#endif

            case '0':
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
                  { /* <octal> */
                  int sptr = 1;

                  while ( isascii( array[sptr] ) &&
                        isdigit( array[sptr] ) )
                        /* Don't increment inside loop control
                         * because if isdigit() is a macro it might
                         * expand into multiple increments ...
                         */
                        ++sptr;

                  c = array[sptr];
                  array[sptr] = '\0';

                  esc_char = otoi( array + 1 );

                  array[sptr] = c;

                  return esc_char;
                  }

            case 'x':
                  { /* \x<hex> */
                  int sptr = 2;

                  while ( isascii( array[sptr] ) &&
                        isxdigit( (char) array[sptr] ) )
                        /* Don't increment inside loop control
                         * because if isdigit() is a macro it might
                         * expand into multiple increments ...
                         */
                        ++sptr;

                  c = array[sptr];
                  array[sptr] = '\0';

                  esc_char = htoi( array + 2 );

                  array[sptr] = c;

                  return esc_char;
                  }

            default:
                  return array[1];
            }
      }


/* otoi - convert an octal digit string to an integer value */

int otoi( str )
Char str[];
      {
      unsigned int result;

      (void) sscanf( (char *) str, "%o", &result );
      return result;
      }


/* out - various flavors of outputing a (possibly formatted) string for the
 *     generated scanner, keeping track of the line count.
 */

void out( str )
const char str[];
      {
      fputs( str, stdout );
      out_line_count( str );
      }

void out_dec( fmt, n )
const char fmt[];
int n;
      {
      printf( fmt, n );
      out_line_count( fmt );
      }

void out_dec2( fmt, n1, n2 )
const char fmt[];
int n1, n2;
      {
      printf( fmt, n1, n2 );
      out_line_count( fmt );
      }

void out_hex( fmt, x )
const char fmt[];
unsigned int x;
      {
      printf( fmt, x );
      out_line_count( fmt );
      }

void out_line_count( str )
const char str[];
      {
      register int i;

      for ( i = 0; str[i]; ++i )
            if ( str[i] == '\n' )
                  ++out_linenum;
      }

void out_str( fmt, str )
const char fmt[], str[];
      {
      printf( fmt, str );
      out_line_count( fmt );
      out_line_count( str );
      }

void out_str3( fmt, s1, s2, s3 )
const char fmt[], s1[], s2[], s3[];
      {
      printf( fmt, s1, s2, s3 );
      out_line_count( fmt );
      out_line_count( s1 );
      out_line_count( s2 );
      out_line_count( s3 );
      }

void out_str_dec( fmt, str, n )
const char fmt[], str[];
int n;
      {
      printf( fmt, str, n );
      out_line_count( fmt );
      out_line_count( str );
      }

void outc( c )
int c;
      {
      putc( c, stdout );

      if ( c == '\n' )
            ++out_linenum;
      }

void outn( str )
const char str[];
      {
      puts( str );
      out_line_count( str );
      ++out_linenum;
      }


/* readable_form - return the the human-readable form of a character
 *
 * The returned string is in static storage.
 */

char *readable_form( c )
register int c;
      {
      static char rform[10];

      if ( (c >= 0 && c < 32) || c >= 127 )
            {
            switch ( c )
                  {
                  case '\b': return "\\b";
                  case '\f': return "\\f";
                  case '\n': return "\\n";
                  case '\r': return "\\r";
                  case '\t': return "\\t";

#if __STDC__
                  case '\a': return "\\a";
                  case '\v': return "\\v";
#endif

                  default:
                        (void) sprintf( rform, "\\%.3o",
                                    (unsigned int) c );
                        return rform;
                  }
            }

      else if ( c == ' ' )
            return "' '";

      else
            {
            rform[0] = c;
            rform[1] = '\0';

            return rform;
            }
      }


/* reallocate_array - increase the size of a dynamic array */

void *reallocate_array( array, size, element_size )
void *array;
int size;
size_t element_size;
      {
      register void *new_array;
      size_t num_bytes = element_size * size;

      new_array = flex_realloc( array, num_bytes );
      if ( ! new_array )
            flexfatal( _( "attempt to increase array size failed" ) );

      return new_array;
      }


/* skelout - write out one section of the skeleton file
 *
 * Description
 *    Copies skelfile or skel array to stdout until a line beginning with
 *    "%%" or EOF is found.
 */
void skelout()
      {
      char buf_storage[MAXLINE];
      char *buf = buf_storage;
      int do_copy = 1;

      /* Loop pulling lines either from the skelfile, if we're using
       * one, or from the skel[] array.
       */
      while ( skelfile ?
            (fgets( buf, MAXLINE, skelfile ) != NULL) :
            ((buf = (char *) skel[skel_ind++]) != 0) )
            { /* copy from skel array */
            if ( buf[0] == '%' )
                  { /* control line */
                  switch ( buf[1] )
                        {
                        case '%':
                              return;

                        case '+':
                              do_copy = C_plus_plus;
                              break;

                        case '-':
                              do_copy = ! C_plus_plus;
                              break;

                        case '*':
                              do_copy = 1;
                              break;

                        default:
                              flexfatal(
                              _( "bad line in skeleton file" ) );
                        }
                  }

            else if ( do_copy )
                  {
                  if ( skelfile )
                        /* Skeleton file reads include final
                         * newline, skel[] array does not.
                         */
                        out( buf );
                  else
                        outn( buf );
                  }
            }
      }


/* transition_struct_out - output a yy_trans_info structure
 *
 * outputs the yy_trans_info structure with the two elements, element_v and
 * element_n.  Formats the output with spaces and carriage returns.
 */

void transition_struct_out( element_v, element_n )
int element_v, element_n;
      {
      out_dec2( " {%4d,%4d },", element_v, element_n );

      datapos += TRANS_STRUCT_PRINT_LENGTH;

      if ( datapos >= 79 - TRANS_STRUCT_PRINT_LENGTH )
            {
            outc( '\n' );

            if ( ++dataline % 10 == 0 )
                  outc( '\n' );

            datapos = 0;
            }
      }


/* The following is only needed when building flex's parser using certain
 * broken versions of bison.
 */
void *yy_flex_xmalloc( size )
int size;
      {
      void *result = flex_alloc( (size_t) size );

      if ( ! result  )
            flexfatal(
                  _( "memory allocation failed in yy_flex_xmalloc()" ) );

      return result;
      }


/* zero_out - set a region of memory to 0
 *
 * Sets region_ptr[0] through region_ptr[size_in_bytes - 1] to zero.
 */

void zero_out( region_ptr, size_in_bytes )
char *region_ptr;
size_t size_in_bytes;
      {
      register char *rp, *rp_end;

      rp = region_ptr;
      rp_end = region_ptr + size_in_bytes;

      while ( rp < rp_end )
            *rp++ = 0;
      }

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