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testlang_conf.l revision 1.26 
      1 %{
      2 /*	$NetBSD: testlang_conf.l,v 1.26 2021/11/15 21:45:46 blymn Exp $ 	*/
      3 
      4 /*-
      5  * Copyright 2009 Brett Lymn <blymn (at) NetBSD.org>
      6  * Copyright 2021 Roland Illig <rillig (at) NetBSD.org>
      7  *
      8  * All rights reserved.
      9  *
     10  * This code has been donated to The NetBSD Foundation by the Author.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <curses.h>
     33 #include <ctype.h>
     34 #include <stdio.h>
     35 #include <stdlib.h>
     36 #include <string.h>
     37 #include <sys/param.h>
     38 #include <err.h>
     39 #include "returns.h"
     40 #include "testlang_parse.h"
     41 
     42 #define MAX_INCLUDES 32 /* limit for the number of nested includes */
     43 
     44 int yylex(void);
     45 
     46 extern size_t line;
     47 extern char *cur_file;		/* from director.c */
     48 
     49 static int include_stack[MAX_INCLUDES];
     50 static char *include_files[MAX_INCLUDES];
     51 static int include_ptr = 0;
     52 
     53 static char *
     54 dequote(const char *s, size_t *len)
     55 {
     56 	const unsigned char *p;
     57 	char *buf, *q;
     58 
     59 	*len = 0;
     60 	p = (const unsigned char *)s;
     61 	while (*p) {
     62 		if (*p == '\\' && p[1]) {
     63 			if (isdigit(p[1]) && isdigit(p[2]) && isdigit(p[3]))
     64 				p += 3;
     65 			else
     66 				++p;
     67 		}
     68 		++(*len);
     69 		++p;
     70 	}
     71 
     72 	buf = malloc(*len + 1);
     73 	if (buf == NULL)
     74 		return NULL;
     75 
     76 	p = (const unsigned char *)s;
     77 	q = buf;
     78 	while (*p) {
     79 		if (*p == '\\' && p[1]) {
     80 			++p;
     81 
     82 			if (isdigit(p[0])) {
     83 				if (isdigit(p[1]) && isdigit(p[2])) {
     84 					*q++ = (p[0] - '0') * 64 +
     85 					    (p[1] - '0') * 8 +
     86 					    (p[2] - '0');
     87 					p += 3;
     88 				} else {
     89 					*q++ = *p++;
     90 				}
     91 				continue;
     92 			}
     93 
     94 			switch (*p) {
     95 			case 'b':
     96 				/* backspace */
     97 				*q++ = '\b';
     98 				p++;
     99 				break;
    100 
    101 			case 'e':
    102 				/* escape */
    103 				*q++ = '\e';
    104 				p++;
    105 				break;
    106 
    107 			case 'n':
    108 				/* newline */
    109 				*q++ = '\n';
    110 				p++;
    111 				break;
    112 
    113 			case 'r':
    114 				/* carriage return */
    115 				*q++ = '\r';
    116 				p++;
    117 				break;
    118 
    119 			case 't':
    120 				/* tab */
    121 				*q++ = '\t';
    122 				p++;
    123 				break;
    124 
    125 			case '\\':
    126 				/* backslash */
    127 				*q++ = '\\';
    128 				p++;
    129 				break;
    130 
    131 			default:
    132 				if (isalpha(*p))
    133 					errx(2,
    134 					    "%s:%zu: Invalid escape sequence "
    135 					    "'\\%c' in string literal",
    136 					    cur_file, line, *p);
    137 				*q++ = *p++;
    138 			}
    139 		} else
    140 			*q++ = *p++;
    141 	}
    142 	*q++ = '\0';
    143 
    144 	return buf;
    145 }
    146 %}
    147 
    148 HEX		0[xX][0-9a-zA-Z]+
    149 STRING		[0-9a-z!#-&(-^ \t%._\\]+
    150 numeric		[-0-9]+
    151 PCHAR           (\\.|[!-~])
    152 ASSIGN		assign
    153 CALL2		call2
    154 CALL3		call3
    155 CALL4		call4
    156 CALL		call
    157 CHECK		check
    158 DELAY		delay
    159 INPUT		input
    160 NOINPUT		noinput
    161 OK_RET		OK
    162 ERR_RET		ERR
    163 COMPARE		compare
    164 COMPAREND	comparend
    165 FILENAME	[A-Za-z0-9.][A-Za-z0-9./_-]+
    166 VARNAME		[A-Za-z][A-Za-z0-9_-]+
    167 NULL_RET	NULL
    168 NON_NULL	NON_NULL
    169 CCHAR		cchar
    170 WCHAR		wchar
    171 BYTE		BYTE
    172 OR		\|
    173 LPAREN		\(
    174 RPAREN		\)
    175 LBRACK		\[
    176 RBRACK		\]
    177 MULTIPLIER	\*
    178 COMMA		,
    179 
    180 %x incl
    181 %option noinput nounput
    182 
    183 %%
    184 
    185 include		BEGIN(incl);
    186 
    187 <incl>[ \t]*	/* eat the whitespace */
    188 <incl>[^ \t\n]+ { /* got the include file name */
    189 		char *inc_file;
    190 
    191 		if (include_ptr > MAX_INCLUDES) {
    192 			errx(2,
    193 			    "%s:%zu: Maximum number of nested includes "
    194 			    "exceeded", cur_file, line);
    195 		}
    196 
    197 		const char *dir_begin;
    198 		int dir_len;
    199 		if (yytext[0] == '/') {
    200 			dir_begin = "";
    201 			dir_len = 0;
    202 		} else {
    203 			dir_begin = cur_file;
    204 			const char *dir_end = strrchr(cur_file, '/');
    205 			if (dir_end != NULL) {
    206 				dir_len = (int)(dir_end + 1 - dir_begin);
    207 			} else {
    208 				dir_begin = ".";
    209 				dir_len = 1;
    210 			}
    211 		}
    212 
    213 		if (asprintf(&inc_file, "%.*s%s",
    214 		    dir_len, dir_begin, yytext) == -1)
    215 			err(2, "Cannot construct include path");
    216 
    217 		yyin = fopen(inc_file, "r");
    218 
    219 		if (!yyin)
    220 			err(1, "Error opening %s", inc_file);
    221 
    222 		yypush_buffer_state(yy_create_buffer(yyin, YY_BUF_SIZE));
    223 
    224 		include_stack[include_ptr] = line;
    225 		include_files[include_ptr++] = cur_file;
    226 		cur_file = inc_file;
    227 		line = 1;
    228 		BEGIN(INITIAL);
    229 	}
    230 
    231 <<EOF>>	{
    232 		yypop_buffer_state();
    233 
    234 		if (!YY_CURRENT_BUFFER)
    235 			yyterminate();
    236 
    237 		if (--include_ptr < 0)
    238 			errx(2, "Include stack underflow");
    239 
    240 		free(cur_file);
    241 		cur_file = include_files[include_ptr];
    242 		line = include_stack[include_ptr];
    243 	}
    244 
    245 {ASSIGN}	return ASSIGN;
    246 {CALL2}		return CALL2;
    247 {CALL3}		return CALL3;
    248 {CALL4}		return CALL4;
    249 {CALL}		return CALL;
    250 {CHECK}		return CHECK;
    251 {DELAY}		return DELAY;
    252 {INPUT}		return INPUT;
    253 {NOINPUT}	return NOINPUT;
    254 {COMPARE}	return COMPARE;
    255 {COMPAREND}	return COMPAREND;
    256 {NON_NULL}	return NON_NULL;
    257 {NULL_RET}	return NULL_RET;
    258 {OK_RET}	return OK_RET;
    259 {ERR_RET}	return ERR_RET;
    260 {MULTIPLIER}	return MULTIPLIER;
    261 {COMMA}		return COMMA;
    262 {CCHAR}		return CCHAR;
    263 {WCHAR}		return WCHAR;
    264 {OR}		return OR;
    265 {LPAREN}	return LPAREN;
    266 {RPAREN}	return RPAREN;
    267 {LBRACK}	return LBRACK;
    268 {RBRACK}	return RBRACK;
    269 
    270 {HEX}		{
    271 			/* Hex value, convert to decimal and return numeric */
    272 			unsigned long val;
    273 
    274 			if (sscanf(yytext, "%lx", &val) != 1)
    275 				errx(1, "Bad hex conversion");
    276 
    277 			asprintf(&yylval.string, "%ld", val);
    278 			return numeric;
    279 		}
    280 
    281 {numeric}	{
    282 			if ((yylval.string = strdup(yytext)) == NULL)
    283 				err(1, "Cannot allocate numeric string");
    284 			return numeric;
    285 		}
    286 
    287 {VARNAME}	{
    288 			if ((yylval.string = strdup(yytext)) == NULL)
    289 				err(1, "Cannot allocate string for varname");
    290 			return VARNAME;
    291 		}
    292 
    293 {FILENAME}	{
    294 			size_t len;
    295 
    296 			if ((yylval.string = dequote(yytext, &len)) == NULL)
    297 				err(1, "Cannot allocate filename string");
    298 			return FILENAME;
    299 		}
    300 
    301 	/* path */
    302 \/{PCHAR}+	{
    303 			size_t len;
    304 			if ((yylval.string = dequote(yytext, &len)) == NULL)
    305 				err(1, "Cannot allocate string");
    306 			return PATH;
    307 		}
    308 
    309 \'{STRING}\' 	{
    310 			char *p;
    311 			size_t len;
    312 
    313 			if ((yylval.retval = malloc(sizeof(ct_data_t))) == NULL)
    314 				err(1, "Cannot allocate return struct");
    315 			p = yytext;
    316 			p++; /* skip the leading ' */
    317 			if ((yylval.retval->data_value = dequote(p, &len))
    318 			     == NULL)
    319 				err(1, "Cannot allocate string");
    320 
    321 			yylval.retval->data_type = data_byte;
    322 			/* trim trailing ' */
    323 			yylval.retval->data_len = len - 1;
    324 			return BYTE;
    325 		}
    326 
    327 \`{STRING}\` 	{
    328 			char *p, *str;
    329 			size_t len, chlen;
    330 			size_t i;
    331 			chtype *rv;
    332 
    333 			if ((yylval.retval = malloc(sizeof(ct_data_t))) == NULL)
    334 				err(1, "Cannot allocate return struct");
    335 			p = yytext;
    336 			p++; /* skip the leading ` */
    337 			if ((str = dequote(p, &len)) == NULL)
    338 				err(1, "Cannot allocate string");
    339 			len--; /* trim trailing ` */
    340 			if ((len % 2) != 0)
    341 				len--;
    342 
    343 			chlen = ((len / 2) + 1) * sizeof(chtype);
    344 			if ((yylval.retval->data_value = malloc(chlen))
    345 			    == NULL)
    346 				err(1, "Cannot allocate chtype array");
    347 
    348 			rv = yylval.retval->data_value;
    349 			for (i = 0; i < len; i += 2)
    350 				*rv++ = (str[i] << 8) | str[i+1];
    351 			*rv = __NORMAL | '\0'; /* terminates chtype array */
    352 			yylval.retval->data_type = data_byte;
    353 			yylval.retval->data_len = chlen;
    354 			return BYTE;
    355 		}
    356 
    357 \"{STRING}\" 	{
    358 			char *p;
    359 			size_t len;
    360 
    361 			p = yytext;
    362 			p++; /* skip the leading " */
    363 			if ((yylval.string = dequote(p, &len)) == NULL)
    364 				err(1, "Cannot allocate string");
    365 
    366 			/* remove trailing " */
    367 			yylval.string[len - 1] = '\0';
    368 			return STRING;
    369 		}
    370 
    371 \${VARNAME}	{
    372 			char *p;
    373 
    374 			p = yytext;
    375 			p++; /* skip $ before var name */
    376 			if ((yylval.string = strdup(p)) == NULL)
    377 				err(1, "Cannot allocate string for varname");
    378 			return VARIABLE;
    379 		}
    380 
    381 	/* whitespace, comments */
    382 [ \t\r]		|
    383 #.*		;
    384 
    385 ^[ \t\r]*#.*\n	|
    386 \\\n		|
    387 ^\n		line++;
    388 
    389 	/* eol on a line with data. need to process, return eol */
    390 #.*\n		|
    391 \n		{
    392 			line++;
    393 			return EOL;
    394 		}
    395 
    396 .		{
    397 			if (isprint((unsigned char)yytext[0]))
    398 				errx(1, "%s:%zu: Invalid character '%c'",
    399 				    cur_file, line + 1, yytext[0]);
    400 			else
    401 				errx(1, "%s:%zu: Invalid character '0x%02x'",
    402 				    cur_file, line + 1, yytext[0]);
    403 		}
    404 
    405 %%
    406 
    407 int
    408 yywrap(void)
    409 {
    410 	return 1;
    411 }
    412