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/*
* Miscellaneous support functions for nec2c.c
*/
#include "shared.h"
/*------------------------------------------------------------------------*/
/* usage()
*
* prints usage information
*/
void usage(void)
{
fprintf( stderr,
"usage: nec2c [-i<input-file-name>] [-o<output-file-name>]"
"\n -h: print this usage information and exit."
"\n -v: print nec2c version number and exit.\n");
} /* end of usage() */
/*------------------------------------------------------------------------*/
/* abort_on_error()
*
* prints an error message and exits
*/
void abort_on_error( int why )
{
switch( why )
{
case -1 : /* abort if input file name too long */
fprintf( stderr, "%s\n",
"nec2c: Input file name too long - aborting" );
break;
case -2 : /* abort if output file name too long */
fprintf( stderr, "%s\n",
"nec2c: Output file name too long - aborting" );
break;
case -3 : /* abort on input file read error */
fprintf( stderr, "%s\n",
"nec2c: Error reading input file - aborting" );
break;
case -4 : /* Abort on malloc failure */
fprintf( stderr, "%s\n",
"nec2c: A memory allocation request has failed - aborting" );
break;
case -5 : /* Abort if a GF card is read */
fprintf( stderr, "%s\n",
"nec2c: NGF solution option not supported - aborting" );
break;
case -6: /* No convergence in gshank() */
fprintf( stderr, "%s\n",
"nec2c: No convergence in gshank() - aborting" );
break;
case -7: /* Error in hankel() */
fprintf( stderr, "%s\n",
"nec2c: Hankel not valid for z=0. - aborting" );
} /* switch( why ) */
/* clean up and quit */
stop( why );
} /* end of abort_on_error() */
/*------------------------------------------------------------------------*/
/* Returns process time (user+system) BUT in _msec_ */
void secnds( double *x)
{
struct tms buffer;
double clk_tck;
times(&buffer);
clk_tck = sysconf( _SC_CLK_TCK );
*x = 1000.0 * (double)(buffer.tms_utime + buffer.tms_stime) / clk_tck;
return;
}
/*------------------------------------------------------------------------*/
/* Does the STOP function of fortran but with return value */
int stop( int flag )
{
if( input_fp != NULL )
fclose( input_fp );
if( output_fp != NULL )
fclose( output_fp );
if( plot_fp != NULL )
fclose( plot_fp );
exit( flag );
}
/*------------------------------------------------------------------*/
/* load_line()
*
* loads a line from a file, aborts on failure. lines beginning
* with a '#' are ignored as comments. at the end of file EOF is
* returned.
*/
int load_line( char *buff, FILE *pfile )
{
int
num_chr, /* number of characters read, excluding lf/cr */
eof = 0, /* EOF flag */
chr; /* character read by getc */
num_chr = 0;
/* clear buffer at start */
buff[0] = '\0';
/* ignore commented lines, white spaces and eol/cr */
if( (chr = fgetc(pfile)) == EOF )
return( EOF );
while( (chr == '#') ||
(chr == ' ') ||
(chr == CR ) ||
(chr == LF ) )
{
/* go to the end of line (look for lf or cr) */
while( (chr != CR) && (chr != LF) )
if( (chr = fgetc(pfile)) == EOF )
return( EOF );
/* dump any cr/lf remaining */
while( (chr == CR) || (chr == LF) )
if( (chr = fgetc(pfile)) == EOF )
return( EOF );
} /* end of while( (chr == '#') || ... */
while( num_chr < LINE_LEN )
{
/* if lf/cr reached before filling buffer, return */
if( (chr == CR) || (chr == LF) )
break;
/* enter new char to buffer */
buff[num_chr++] = (char)chr;
/* terminate buffer as a string on EOF */
if( (chr = fgetc(pfile)) == EOF )
{
buff[num_chr] = '\0';
eof = EOF;
}
} /* end of while( num_chr < max_chr ) */
/* Capitalize first two characters (mnemonics) */
if( (buff[0] > 0x60) && (buff[0] < 0x79) )
buff[0] -= 0x20;
if( (buff[1] > 0x60) && (buff[1] < 0x79) )
buff[1] -= 0x20;
/* terminate buffer as a string */
buff[num_chr] = '\0';
return( eof );
} /* end of load_line() */
/*------------------------------------------------------------------------*/
/*** Memory allocation/freeing utils ***/
void mem_alloc( void **ptr, size_t req )
{
free_ptr( ptr );
*ptr = malloc( req );
if( *ptr == NULL )
abort_on_error( -4 );
} /* End of void mem_alloc() */
/*------------------------------------------------------------------------*/
void mem_realloc( void **ptr, size_t req )
{
*ptr = realloc( *ptr, req );
if( *ptr == NULL )
abort_on_error( -4 );
} /* End of void mem_realloc() */
/*------------------------------------------------------------------------*/
void free_ptr( void **ptr )
{
if( *ptr != NULL )
free( *ptr );
*ptr = NULL;
} /* End of void free_ptr() */
/*------------------------------------------------------------------------*/
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