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25 /* A file to build "scanner.c". */
26 /* This tests that we can use "yyextra".
27 We buffer all input into a growable array, then print it.
28 We run diff on the input and output.
36 /* We'll store the entire input in this buffer, growing as necessary. */
43 #define YY_EXTRA_TYPE struct Buffer *
45 /* Save char into junk array at next position. */
46 static void append_char (char c, yyscan_t scanner );
50 %option 8bit outfile="scanner.c" prefix="test"
51 %option nounput nomain noyywrap nodefault
58 .|\r|\n { append_char (yytext[0],yyscanner); }
71 buf = (struct Buffer*) malloc(sizeof(struct Buffer));
75 buf->data = (char*)malloc(buf->max_len);
77 testlex_init(&scanner);
78 testset_in( stdin, scanner);
79 testset_out( stdout, scanner);
80 testset_extra( buf, scanner );
83 buf = testget_extra(scanner);
84 for(i=0; i < buf->curr_len; i++)
85 fputc( buf->data[i], stdout );
89 testlex_destroy(scanner);
93 /* Save char into junk array at next position. */
94 static void append_char (char c, yyscan_t scanner )
96 struct Buffer *buf, *new_buf;
97 buf = testget_extra(scanner);
99 /* Grow buffer if necessary. */
101 if( buf->curr_len >= buf->max_len )
103 new_buf = (struct Buffer*) malloc(sizeof(struct Buffer));
104 new_buf->max_len = buf->max_len + buf->grow_len;
105 new_buf->grow_len = buf->grow_len;
106 new_buf->data = (char*)malloc(new_buf->max_len);
107 for( new_buf->curr_len = 0;
108 new_buf->curr_len < buf->curr_len;
109 new_buf->curr_len++ )
111 new_buf->data[ new_buf->curr_len] = buf->data [ new_buf->curr_len];
116 testset_extra( buf, scanner );
120 buf->data[ buf->curr_len++ ] = c;