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Bug #1286 » dmpf.cpp

Robin Mills, 05 Apr 2017 18:29

 
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#include <stdio.h>
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#include <string.h>
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static enum
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{	errorOK = 0
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, 	errorSyntax
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,   errorProcessing
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} error = errorOK ;
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void syntax()
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{
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	printf("syntax: dmpf [-option]+ filename\n") ;
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}
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bool printable(unsigned char c) { return c >= 32 && c < 127 && c != '.' ; }
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int main(int argc, char* argv[])
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{
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	char* filename = argv[1] ;
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	FILE* f = NULL ;
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//  GCC_PREFIX_HEADER = dmpf.pch
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//	GCC_PRECOMPILE_PREFIX_HEADER = YES
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//	printf("engineer = %s\n",ENGINEER) ; // compiled in by dmpf.pch
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	if ( argc < 2 ) {
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		syntax() ;
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		error = errorSyntax ;
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	}
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	if ( !error ) {
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		f = strcmp(filename,"-") ? fopen(filename,"rb") : stdin ;
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		if ( !f ) {
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			printf("unable to open file %s\n",filename) ;
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			error = errorProcessing ;
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		}
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	}
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	if ( !error  )
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	{
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		char line[1000] ;
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		char buff[16]   ;
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		int  n          ;
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		int count = 0   ;
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		while ( (n = fread(buff,1,sizeof buff,f)) > 0 )
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		{
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			// line number
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			int l = sprintf(line,"%#8x %8d: ",count,count ) ;
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			count += n ;
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			// ascii print
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			for ( int i = 0 ; i < n ; i++ )
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			{
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				char c = buff[i] ;
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		        l += sprintf(line+l,"%c", printable(c) ? c : '.' ) ;
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			}
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			// blank pad the ascii
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			int save = n ;
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			while ( n++ < sizeof(buff) ) l += sprintf(line+l," ") ;
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			n = save     ;
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		    // hex code
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		    l += sprintf(line+l,"  -> ") ;
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			for ( int i = 0 ; i < n ; i++ )
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			{
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				unsigned char c = buff[i] ;
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				l += sprintf(line+l,printable(c) ? "  %c" : " %02x" ,c) ;
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			}
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			line[l] = 0 ;
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			printf("%s\n",line) ;
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		}
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	}
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	return error ;
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}
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