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- /* misc - miscellaneous flex routines */
-
- /*
- * Copyright (c) 1987, the University of California
- *
- * 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.
- *
- * This program may be redistributed. Enhancements and derivative works
- * may be created provided the new works, if made available to the general
- * public, are made available for use by anyone.
- */
-
- #include <ctype.h>
- #include "flexdef.h"
-
- char *malloc(), *realloc();
-
-
- /* action_out - write the actions from the temporary file to lex.yy.c
- *
- * synopsis
- * action_out();
- *
- * Copies the action file up to %% (or end-of-file) to lex.yy.c
- */
-
- action_out()
-
- {
- char buf[MAXLINE];
-
- while ( fgets( buf, MAXLINE, temp_action_file ) != NULL )
- if ( buf[0] == '%' && buf[1] == '%' )
- break;
- else
- fputs( buf, stdout );
- }
-
-
- /* allocate_array - allocate memory for an integer array of the given size */
-
- char *allocate_array( size, element_size )
- int size, element_size;
-
- {
- register char *mem = malloc( (unsigned) (element_size * size) );
-
- if ( mem == NULL )
- flexfatal( "memory allocation failed in allocate_array()" );
-
- return ( mem );
- }
-
-
- /* bubble - bubble sort an integer array in increasing order
- *
- * synopsis
- * int v[n], n;
- * 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 */
-
- 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;
- }
- }
-
-
- /* clower - replace upper-case letter to lower-case
- *
- * synopsis:
- * char clower(), c;
- * c = clower( c );
- */
-
- char clower( c )
- register char c;
-
- {
- return ( isupper(c) ? tolower(c) : c );
- }
-
-
- /* copy_string - returns a dynamically allocated copy of a string
- *
- * synopsis
- * char *str, *copy, *copy_string();
- * copy = copy_string( str );
- */
-
- char *copy_string( str )
- register char *str;
-
- {
- register char *c;
- char *copy;
-
- /* find length */
- for ( c = str; *c; ++c )
- ;
-
- copy = malloc( (unsigned) ((c - str + 1) * sizeof( char )) );
-
- if ( copy == NULL )
- flexfatal( "dynamic memory failure in copy_string()" );
-
- for ( c = copy; (*c++ = *str++); )
- ;
-
- return ( copy );
- }
-
-
- /* cshell - shell sort a character array in increasing order
- *
- * synopsis
- *
- * char v[n];
- * int n;
- * cshell( v, n );
- *
- * description
- * does a shell sort of the first n elements of array v.
- *
- * passed
- * v - array to be sorted
- * n - number of elements of v to be sorted
- */
- cshell( v, n )
- char v[];
- int n;
-
- {
- 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 ( v[j] <= v[jg] )
- break;
-
- k = v[j];
- v[j] = v[jg];
- v[jg] = k;
- }
- }
-
-
- /* dataend - finish up a block of data declarations
- *
- * synopsis
- * dataend();
- */
- dataend()
-
- {
- if ( datapos > 0 )
- dataflush();
-
- /* add terminator for initialization */
- puts( " } ;\n" );
-
- dataline = 0;
- }
-
-
-
- /* dataflush - flush generated data statements
- *
- * synopsis
- * dataflush();
- */
- dataflush()
-
- {
- putchar( '\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
- */
- putchar( '\n' );
- dataline = 0;
- }
-
- /* reset the number of characters written on the current line */
- datapos = 0;
- }
-
- /* gettime - return current time
- *
- * synopsis
- * char *gettime(), *time_str;
- * time_str = gettime();
- */
-
- /* include sys/types.h to use time_t and make lint happy */
-
- #include <sys/types.h>
-
- char *gettime()
-
- {
- time_t t, time();
- char *result, *ctime(), *copy_string();
-
- t = time( (long *) 0 );
-
- result = copy_string( ctime( &t ) );
-
- /* get rid of trailing newline */
- result[24] = '\0';
-
- return ( result );
- }
-
-
- /* lerrif - report an error message formatted with one integer argument
- *
- * synopsis
- * char msg[];
- * int arg;
- * lerrif( msg, arg );
- */
-
- lerrif( msg, arg )
- char msg[];
- int arg;
-
- {
- char errmsg[MAXLINE];
- (void) sprintf( errmsg, msg, arg );
- flexerror( errmsg );
- }
-
-
- /* lerrsf - report an error message formatted with one string argument
- *
- * synopsis
- * char msg[], arg[];
- * lerrsf( msg, arg );
- */
-
- lerrsf( msg, arg )
- char msg[], arg[];
-
- {
- char errmsg[MAXLINE];
-
- (void) sprintf( errmsg, msg, arg );
- flexerror( errmsg );
- }
-
-
- /* flexerror - report an error message and terminate
- *
- * synopsis
- * char msg[];
- * flexerror( msg );
- */
-
- flexerror( msg )
- char msg[];
-
- {
- fprintf( stderr, "flex: %s\n", msg );
- flexend( 1 );
- }
-
-
- /* flexfatal - report a fatal error message and terminate
- *
- * synopsis
- * char msg[];
- * flexfatal( msg );
- */
-
- flexfatal( msg )
- char msg[];
-
- {
- fprintf( stderr, "flex: fatal internal error %s\n", msg );
- flexend( 1 );
- }
-
-
- /* line_directive_out - spit out a "# line" statement */
-
- line_directive_out( output_file_name )
- FILE *output_file_name;
-
- {
- if ( infilename && gen_line_dirs )
- fprintf( output_file_name, "# line %d \"%s\"\n", linenum, infilename );
- }
-
-
- /* mk2data - generate a data statement for a two-dimensional array
- *
- * synopsis
- * int value;
- * mk2data( value );
- *
- * generates a data statement initializing the current 2-D array to "value"
- */
- mk2data( value )
- int value;
-
- {
- if ( datapos >= NUMDATAITEMS )
- {
- putchar( ',' );
- dataflush();
- }
-
- if ( datapos == 0 )
- /* indent */
- fputs( " ", stdout );
-
- else
- putchar( ',' );
-
- ++datapos;
-
- printf( "%5d", value );
- }
-
-
- /* mkdata - generate a data statement
- *
- * synopsis
- * int value;
- * mkdata( value );
- *
- * generates a data statement initializing the current array element to
- * "value"
- */
- mkdata( value )
- int value;
-
- {
- if ( datapos >= NUMDATAITEMS )
- {
- putchar( ',' );
- dataflush();
- }
-
- if ( datapos == 0 )
- /* indent */
- fputs( " ", stdout );
-
- else
- putchar( ',' );
-
- ++datapos;
-
- printf( "%5d", value );
- }
-
-
- /* myctoi - return the integer represented by a string of digits
- *
- * synopsis
- * char array[];
- * int val, myctoi();
- * val = myctoi( array );
- *
- */
-
- int myctoi( array )
- char array[];
-
- {
- int val = 0;
-
- (void) sscanf( array, "%d", &val );
-
- return ( val );
- }
-
-
- /* myesc - return character corresponding to escape sequence
- *
- * synopsis
- * char array[], c, myesc();
- * c = myesc( array );
- *
- */
-
- char myesc( array )
- char array[];
-
- {
- switch ( array[1] )
- {
- case 'n': return ( '\n' );
- case 't': return ( '\t' );
- case 'f': return ( '\f' );
- case 'r': return ( '\r' );
- case 'b': return ( '\b' );
-
- case '0':
- if ( isdigit(array[2]) )
- { /* \0<octal> */
- char c, esc_char;
- register int sptr = 2;
-
- while ( isdigit(array[sptr]) )
- /* don't increment inside loop control because the
- * macro will expand it to two increments! (Not a
- * problem with the C version of the macro)
- */
- ++sptr;
-
- c = array[sptr];
- array[sptr] = '\0';
-
- esc_char = otoi( array + 2 );
- array[sptr] = c;
-
- if ( esc_char == '\0' )
- {
- synerr( "escape sequence for null not allowed" );
- return ( 1 );
- }
-
- return ( esc_char );
- }
-
- else
- {
- synerr( "escape sequence for null not allowed" );
- return ( 1 );
- }
-
- #ifdef NOTDEF
- case '^':
- {
- register char next_char = array[2];
-
- if ( next_char == '?' )
- return ( 0x7f );
-
- else if ( next_char >= 'A' && next_char <= 'Z' )
- return ( next_char - 'A' + 1 );
-
- else if ( next_char >= 'a' && next_char <= 'z' )
- return ( next_char - 'z' + 1 );
-
- synerr( "illegal \\^ escape sequence" );
-
- return ( 1 );
- }
- #endif
- }
-
- return ( array[1] );
- }
-
-
- /* otoi - convert an octal digit string to an integer value
- *
- * synopsis:
- * int val, otoi();
- * char str[];
- * val = otoi( str );
- */
-
- int otoi( str )
- char str[];
-
- {
- #ifdef FTLSOURCE
- fortran int gctoi()
- int dummy = 1;
-
- return ( gctoi( str, dummy, 8 ) );
- #else
- int result;
-
- (void) sscanf( str, "%o", &result );
-
- return ( result );
- #endif
- }
-
-
-
-
- /* reallocate_array - increase the size of a dynamic array */
-
- char *reallocate_array( array, size, element_size )
- char *array;
- int size, element_size;
-
- {
- register char *new_array = realloc( array,
- (unsigned) (size * element_size ));
-
- if ( new_array == NULL )
- flexfatal( "attempt to increase array size failed" );
-
- return ( new_array );
- }
-
-
- /* skelout - write out one section of the skeleton file
- *
- * synopsis
- * skelout();
- *
- * DESCRIPTION
- * Copies from skelfile to stdout until a line beginning with "%%" or
- * EOF is found.
- */
- skelout()
-
- {
- char buf[MAXLINE];
-
- while ( fgets( buf, MAXLINE, skelfile ) != NULL )
- if ( buf[0] == '%' && buf[1] == '%' )
- break;
- else
- fputs( buf, stdout );
- }
-
-
- /* transition_struct_out - output a yy_trans_info structure
- *
- * synopsis
- * int element_v, element_n;
- * transition_struct_out( element_v, element_n );
- *
- * outputs the yy_trans_info structure with the two elements, element_v and
- * element_n. Formats the output with spaces and carriage returns.
- */
-
- transition_struct_out( element_v, element_n )
- int element_v, element_n;
-
- {
- printf( "%7d, %5d,", element_v, element_n );
-
- datapos += TRANS_STRUCT_PRINT_LENGTH;
-
- if ( datapos >= 75 )
- {
- printf( "\n" );
-
- if ( ++dataline % 10 == 0 )
- printf( "\n" );
-
- datapos = 0;
- }
- }
-