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资源说明：simple source code scanner written with flex
Description
===========
sourcecode-scanner project aims to provide a lexical analyser for C-like programming language
source code which is automatically generated by flex (fast lexical analyser generator).
Instructions
============
To generate the actual scanner program use flex (in linux):
$ flex scanner.l
flex will output a file names 'lex.yy.c'. Still need to compile this:
$ gcc lex.yy.l
Note: Keep in mind... If gcc gives a yywrap error (about linkage to libfl.a), you need to add -lfl
parameter while compiling. Probably this will not happen, because it is already ignored to link
that library in the source code.
To run:
$ a.out [input-file]
---------------------------------------
The output will be the tokens with token numbers line by line. An example of running:
Input file: test.c
int main ( )
{
/* comment */
/* First comment
first comment—line two*/
/* Second comment */
int sum ; // comment
char w_12hat___is_me122_ = "This is a string_____";
sum = 0 ;
int i ;
for ( i = 0 ; i < 25 ; i = i + 1 ) {
sum = sum + i ;
}
for(i=0;i<=16;i++){ /* do
* something
* here
*/
}
return 0 ;
}
Output: stdout
269
258 main
40
41
123
269
258 sum
59
268
258 w_12hat___is_me122_
61
260 This is a string_____
59
258 sum
61
259 0x00000000
59
269
258 i
59
274
40
258 i
61
259 0x00000000
59
258 i
60
259 0x00000019
59
258 i
61
258 i
43
259 0x00000001
41
123
258 sum
61
258 sum
43
258 i
59
125
274
40
258 i
61
259 0x00000000
59
258 i
261
259 0x00000010
59
258 i
43
43
41
123
125
277
259 0x00000000
59
125
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