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testlang_conf.l revision 1.6 
      1 %{
      2 /*	$NetBSD: testlang_conf.l,v 1.6 2011/10/07 13:39:33 joerg Exp $ 	*/
      3 
      4 /*-
      5  * Copyright 2009 Brett Lymn <blymn (at) NetBSD.org>
      6  *
      7  * All rights reserved.
      8  *
      9  * This code has been donated to The NetBSD Foundation by the Author.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. The name of the author may not be used to endorse or promote products
     17  *    derived from this software withough specific prior written permission
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  *
     30  *
     31  */
     32 
     33 #include <curses.h>
     34 #include <ctype.h>
     35 #include <stdio.h>
     36 #include <stdlib.h>
     37 #include <string.h>
     38 #include <sys/param.h>
     39 #include <err.h>
     40 #include "returns.h"
     41 #include "testlang_parse.h"
     42 
     43 #define MAX_INCLUDES 32 /* limit for the number of nested includes */
     44 
     45 int yylex(void);
     46 
     47 extern size_t line;
     48 extern char *include_path; 	/* from director.c */
     49 extern char *cur_file;		/* from director.c */
     50 
     51 static int include_stack[MAX_INCLUDES];
     52 static char *include_files[MAX_INCLUDES];
     53 static int include_ptr = 0;
     54 
     55 static char *
     56 dequote(const char *s, size_t *len)
     57 {
     58 	const unsigned char *p;
     59 	char *buf, *q;
     60 
     61 	*len = 0;
     62 	p = (const unsigned char *)s;
     63 	while (*p) {
     64 		if (*p == '\\' && *(p+1)) {
     65 			if (isdigit(*(p+1)) && *(p+2) && isdigit(*(p+2)) &&
     66 			    *(p+3) && isdigit(*(p+3)))
     67 				p += 3;
     68 			else
     69 				++p;
     70 		}
     71 		++(*len);
     72 		++p;
     73 	}
     74 
     75 	buf = malloc(*len + 1);
     76 	if (buf == NULL)
     77 		return NULL;
     78 
     79 	p = (const unsigned char *)s;
     80 	q = buf;
     81 	while (*p) {
     82 		if (*p == '\\' && *(p+1)) {
     83 			++p;
     84 			if (isdigit(*p)) {
     85 				if (*(p+1) && isdigit(*(p+1)) && *(p+2) &&
     86 				    isdigit(*(p+2))) {
     87 					*q++ = ((*p - '0') * 8 + (*(p+1) - '0')) * 8 + (*(p+2) - '0');
     88 					p += 3;
     89 				} else {
     90 					*q++ = *p++;
     91 				}
     92 			} else {
     93 				switch (*p) {
     94 				case 'e':
     95 					/* escape */
     96 					*q++ = '\e';
     97 					p++;
     98 					break;
     99 
    100 				case 'n':
    101 					/* newline */
    102 					*q++ = '\n';
    103 					p++;
    104 					break;
    105 
    106 				case 't':
    107 					/* tab */
    108 					*q++ = '\t';
    109 					p++;
    110 					break;
    111 
    112 				case '\\':
    113 					/* backslash */
    114 					*q++ = '\\';
    115 					p++;
    116 					break;
    117 
    118 				default:
    119 					*q++ = *p++;
    120 				}
    121 			}
    122 		} else
    123 			*q++ = *p++;
    124 	}
    125 	*q++ = '\0';
    126 
    127 	return buf;
    128 }
    129 %}
    130 
    131 HEX		0[xX][0-9a-zA-Z]+
    132 STRING		[0-9a-z!#-&(-^ \t%._\\]+
    133 numeric		[-0-9]+
    134 PCHAR           (\\.|[^ \t\n])
    135 ASSIGN		[aA][sS][sS][iI][gG][nN]
    136 CALL2		[cC][aA][lL][lL]2
    137 CALL3		[cC][aA][lL][lL]3
    138 CALL4		[cC][aA][lL][lL]4
    139 CALL		[cC][aA][lL][lL]
    140 CHECK		[cC][hH][eE][cC][kK]
    141 DELAY		[dD][eE][lL][aA][yY]
    142 INPUT		[iI][nN][pP][uU][tT]
    143 NOINPUT		[nN][oO][iI][nN][pP][uU][tT]
    144 OK_RET		[oO][kK]
    145 ERR_RET		[eE][rR][rR]
    146 COMPARE		[cC][oO][mM][pP][aA][rR][eE]
    147 COMPAREND	[cC][oO][mM][pP][aA][rR][eE][Nn][Dd]
    148 FILENAME	[A-Za-z0-9.][A-Za-z0-9./_-]+
    149 VARNAME		[A-Za-z][A-Za-z0-9_-]+
    150 NULL_RET	NULL
    151 NON_NULL	NON_NULL
    152 BYTE		BYTE
    153 OR		\|
    154 LHB		\(
    155 RHB		\)
    156 
    157 %x incl
    158 %option noinput nounput
    159 
    160 %%
    161 
    162 include		BEGIN(incl);
    163 
    164 <incl>[ \t]*      /* eat the whitespace */
    165 <incl>[^ \t\n]+   { /* got the include file name */
    166 		char inc_file[MAXPATHLEN];
    167 
    168 		if (include_ptr > MAX_INCLUDES) {
    169 			fprintf(stderr,
    170 				"Maximum number of nested includes exceeded "
    171 				"at line %zu of file %s\n", line, cur_file);
    172 				exit(2);
    173 		}
    174 
    175 		if (yytext[0] != '/') {
    176 			if (strlcpy(inc_file, include_path, sizeof(inc_file))
    177 			    >= sizeof(inc_file))
    178 				err(2, "CHECK_PATH too long");
    179 			if ((include_path[strlen(include_path) - 1] != '/') &&
    180 			    ((strlcat(inc_file, "/", sizeof(inc_file))
    181 			    >= sizeof(inc_file))))
    182 				err(2, "Could not append / to include file path");
    183 		} else {
    184 			inc_file[0] = '\0';
    185 		}
    186 
    187 		if (strlcat(inc_file, yytext, sizeof(inc_file))
    188 		    >= sizeof(inc_file))
    189 			err(2, "Path to include file path overflowed");
    190 
    191 		yyin = fopen(inc_file, "r" );
    192 
    193 		if (!yyin)
    194 			err(1, "Error opening %s", inc_file);
    195 
    196 		yypush_buffer_state(yy_create_buffer(yyin, YY_BUF_SIZE));
    197 
    198 		include_stack[include_ptr] = line;
    199 		include_files[include_ptr++] = cur_file;
    200 		cur_file = strdup(inc_file);
    201 		if (cur_file == NULL)
    202 			err(2, "Cannot allocate new include file string");
    203 		line = 0;
    204 		BEGIN(INITIAL);
    205 	}
    206 
    207 <<EOF>>	{
    208 		yypop_buffer_state();
    209 
    210 		if ( !YY_CURRENT_BUFFER )
    211 		{
    212 			yyterminate();
    213 		}
    214 
    215 		if (--include_ptr < 0)
    216 			err(2, "Include stack underflow");
    217 
    218 		free(cur_file);
    219 		cur_file = include_files[include_ptr];
    220 		line = include_stack[include_ptr];
    221 	}
    222 
    223 {ASSIGN}	{
    224 			return ASSIGN;
    225 		}
    226 
    227 {CALL2}		{
    228 			return CALL2;
    229 		}
    230 
    231 {CALL3}		{
    232 			return CALL3;
    233 		}
    234 
    235 {CALL4}		{
    236 			return CALL4;
    237 		}
    238 
    239 {CALL}		{
    240 			return CALL;
    241 		}
    242 
    243 {CHECK}		{
    244 			return CHECK;
    245 		}
    246 
    247 {DELAY}		{
    248 			return DELAY;
    249 		}
    250 
    251 {INPUT}		{
    252 			return INPUT;
    253 		}
    254 
    255 {NOINPUT}		{
    256 			return NOINPUT;
    257 		}
    258 
    259 {COMPARE}	{
    260 			return COMPARE;
    261 		}
    262 
    263 {COMPAREND}	{
    264 			return COMPAREND;
    265 		}
    266 
    267 {NON_NULL}	{
    268 			return NON_NULL;
    269 		}
    270 
    271 {NULL_RET}		{
    272 			return NULL_RET;
    273 		}
    274 
    275 {OK_RET}		{
    276 			return OK_RET;
    277 		}
    278 
    279 {ERR_RET}		{
    280 			return ERR_RET;
    281 		}
    282 
    283 {OR}		{
    284 			return OR;
    285 		}
    286 
    287 {LHB}		{
    288 			return LHB;
    289 		}
    290 
    291 {RHB}		{
    292 			return RHB;
    293 		}
    294 
    295 {HEX}		{
    296 			/* Hex value, convert to decimal and return numeric */
    297 			unsigned long val;
    298 
    299 			if (sscanf(yytext, "%lx", &val) != 1)
    300 				err(1, "Bad hex conversion");
    301 
    302 			asprintf(&yylval.string, "%ld", val);
    303 			return numeric;
    304 		}
    305 
    306 
    307 {numeric}		{
    308 			if ((yylval.string = strdup(yytext)) == NULL)
    309 				err(1, "Cannot allocate numeric string");
    310 			return numeric;
    311 }
    312 
    313 {VARNAME}	{
    314 			if ((yylval.string = strdup(yytext)) == NULL)
    315 				err(1, "Cannot allocate string for varname");
    316 			return VARNAME;
    317 		}
    318 
    319 {FILENAME}	{
    320 			size_t len;
    321 
    322 			if ((yylval.string = dequote(yytext, &len)) == NULL)
    323 				err(1, "Cannot allocate filename string");
    324 			return FILENAME;
    325 		}
    326 
    327 	/* path */
    328 \/{PCHAR}+	{
    329 			size_t len;
    330 			if ((yylval.string = dequote(yytext, &len)) == NULL)
    331 				err(1, "Cannot allocate string");
    332 			return PATH;
    333 		}
    334 
    335 \'{STRING}\' 	{
    336 			char *p;
    337 			size_t len;
    338 
    339 			if ((yylval.retval = malloc(sizeof(returns_t))) == NULL)
    340 				err(1, "Cannot allocate return struct");
    341 			p = yytext;
    342 			p++; /* skip the leading ' */
    343 			if ((yylval.retval->return_value = dequote(p, &len))
    344 			     == NULL)
    345 				err(1, "Cannot allocate string");
    346 
    347 			yylval.retval->return_type = ret_byte;
    348 			/* trim trailing ' */
    349 			yylval.retval->return_len = len - 1;
    350 			return BYTE;
    351 		}
    352 
    353 \`{STRING}\` 	{
    354 			char *p, *str;
    355 			size_t len, chlen;
    356 			size_t i;
    357 			chtype *rv;
    358 
    359 			if ((yylval.retval = malloc(sizeof(returns_t))) == NULL)
    360 				err(1, "Cannot allocate return struct");
    361 			p = yytext;
    362 			p++; /* skip the leading ' */
    363 			if ((str = dequote(p, &len)) == NULL)
    364 				err(1, "Cannot allocate string");
    365 			len--; /* trim trailing ` */
    366 			if ((len % 2) != 0)
    367 				len--;
    368 
    369 			chlen = ((len / 2) + 1) * sizeof(chtype);
    370 			if ((yylval.retval->return_value = malloc(chlen))
    371 			    == NULL)
    372 				err(1, "Cannot allocate chtype array");
    373 
    374 			rv = yylval.retval->return_value;
    375 			for (i = 0; i < len; i += 2)
    376 				*rv++ = (str[i] << 8) | str[i+1];
    377 			*rv = __NORMAL | '\0'; /* terminates chtype array */
    378 			yylval.retval->return_type = ret_byte;
    379 			yylval.retval->return_len = chlen;
    380 			return BYTE;
    381 		}
    382 
    383 \"{STRING}\" 	{
    384 			char *p;
    385 			size_t len;
    386 
    387 			p = yytext;
    388 			p++; /* skip the leading " */
    389 			if ((yylval.string = dequote(p, &len)) == NULL)
    390 				err(1, "Cannot allocate string");
    391 
    392 			/* remove trailing " */
    393 			yylval.string[len - 1] = '\0';
    394 			return STRING;
    395 		}
    396 
    397 \${VARNAME}	{
    398 			char *p;
    399 
    400 			p = yytext;
    401 			p++; /* skip $ before var name */
    402 			if ((yylval.string = strdup(p)) == NULL)
    403 				err(1, "Cannot allocate string for varname");
    404 			return VARIABLE;
    405 		}
    406 
    407 	/* comments, white-outs */
    408 [ \t\r]		|
    409 #.*		;
    410 ^#.*\n		|
    411 #.*\n		|
    412 \\\n		|
    413 ^\n		{
    414 line++; }
    415 
    416 	/* eol on a line with data. need to process, return eol */
    417 \n		{
    418 			line++;
    419 			return EOL;
    420 		}
    421 
    422 .		{
    423 		}
    424 
    425 %%
    426 
    427 int
    428 yywrap(void)
    429 {
    430 	return 1;
    431 }
    432