Looking for microe book

demonkiddo — Sat, 04 Dec 2010 08:58:54 +0800

Hi all,

I'm looking for book as below.Second hand is fine for me.

Digital Design Principle & Practices by John F Wakerly
Advanced Microprocessor by Daniel Tabak

Please reply in this topic if you have and want to sell it. Thank you

rgds
Lim

[Help] Lexical Analyser using Knoppix

demonkiddo — Sat, 02 Dec 2006 14:54:13 +0800

i have a lexical tester like below

/* Sample start code for lexical analyser.
* You will have to write yylex() and code to insert things into the
* symbol table yourself.
*
* Note: yylex should read from the FILE *inputfile instead of stdin
* in order for the file opening to work. I.e. use
* fgetc(inputfile) instead of getchar().
*/
#include <stdio.h>
#include "lex.h"

int main(int argc, char *argv[])
{ if (argc>=2)
{ inputfile = fopen(argv[1],"r");
if (inputfile==NULL)
{ perror("opening input file");
exit(1);
}
if (argc>=3)
{ outputfile = fopen(argv[2],"w");
if (outputfile==NULL)
{ perror("opening output file");
exit(1);
}
}
else
outputfile=stdout;
}
else
{ inputfile = stdin;
outputfile = stdout;
}

/* Code to test yylex */
do
{ nextsymb = yylex();
printToken(nextsymb);
} while (nextsymb!=T_EOF);
}

char tokenNames[36][20] = {
"T_INVALID",
"T_START",
"T_END",
"T_FUN",
"T_NUF",
"T_VAR",
"T_IF",
"T_THEN",
"T_ELSE",
"T_FI",
"T_PRINT",
"T_GETCHAR",
"T_PUTCHAR",
"T_RETURN",
"T_FOR",
"T_DO",
"T_TIMES",
"T_ROF",
"T_BRA",
"T_KET",
"T_COMMA",
"T_PERIOD",
"T_LESS",
"T_MORE",
"T_EQUAL",
"T_PLUS",
"T_MINUS",
"T_MULTIPLY",
"T_DIVIDE",
"T_MODULUS",
"T_ASSIGN",
"T_IDENTIFIER",
"T_NUMBER",
"T_CHAR",
"T_STRING",
"T_EOF"
};

int printToken(int nextsymb)
{ fprintf(stderr,"%s ",tokenNames[nextsymb]);
switch (nextsymb)
{ case T_NUMBER:
fprintf(stderr,"%d\n", nextvalue);
break;
case T_CHAR:
fprintf(stderr,"'%c'\n",nextvalue);
break;
case T_IDENTIFIER:
fprintf(stderr,"%d %s\n", nextvalue, symtab[nextvalue].name);
break;
case T_INVALID:
fprintf(stderr, "'%c'\n", nextvalue);
break;
case T_STRING:
fprintf(stderr,"\"%s\"", nexttext);
default:
putc('\n',stderr);
}
}

above is a uncomplete lexical analyser.....i need to add in the scanner part to scan the 36 T_integer, creat a symbol table and add in source code so that the lexical analyser can recognize character, integer, number, brackets etc..

anyone that has been went through this lexical analyser please give me some hint of how to start doing it.....thank you

below are the 6 of the results that produce by complete lexical analyser after compling

Lowyat.NET: Latest topics by demonkiddo

Looking for microe book

[Help] Lexical Analyser using Knoppix