mirror of
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
synced 2024-11-16 06:25:35 +08:00
7ac29190db
The lexer will go with the longest match, so previously the starting double quotes of a string would be swallowed by the [^ \t\r\n()]+ pattern leaving the user no way to actually use strings with escape sequences. Fix this by not allowing this case to start with double quotes. Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
147 lines
3.4 KiB
Plaintext
147 lines
3.4 KiB
Plaintext
/* SPDX-License-Identifier: GPL-2.0 */
|
|
%{
|
|
#include "emp_ematch.yacc.h"
|
|
#include "m_ematch.h"
|
|
|
|
extern int ematch_argc;
|
|
extern char **ematch_argv;
|
|
|
|
#define yylval ematch_lval
|
|
|
|
#define NEXT_EM_ARG() do { ematch_argc--; ematch_argv++; } while(0);
|
|
|
|
#define YY_INPUT(buf, result, max_size) \
|
|
{ \
|
|
next: \
|
|
if (ematch_argc <= 0) \
|
|
result = YY_NULL; \
|
|
else if (**ematch_argv == '\0') { \
|
|
NEXT_EM_ARG(); \
|
|
goto next; \
|
|
} else { \
|
|
if (max_size <= strlen(*ematch_argv) + 1) { \
|
|
fprintf(stderr, "match argument too long.\n"); \
|
|
result = YY_NULL; \
|
|
} else { \
|
|
strcpy(buf, *ematch_argv); \
|
|
result = strlen(*ematch_argv) + 1; \
|
|
buf[result-1] = ' '; \
|
|
buf[result] = '\0'; \
|
|
NEXT_EM_ARG(); \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
static void __attribute__ ((unused)) yyunput (int c,char *buf_ptr );
|
|
static void __attribute__ ((unused)) yy_push_state (int new_state );
|
|
static void __attribute__ ((unused)) yy_pop_state (void);
|
|
static int __attribute__ ((unused)) yy_top_state (void );
|
|
|
|
static char *strbuf;
|
|
static unsigned int strbuf_size;
|
|
static unsigned int strbuf_index;
|
|
|
|
static void strbuf_enlarge(void)
|
|
{
|
|
strbuf_size += 512;
|
|
strbuf = realloc(strbuf, strbuf_size);
|
|
}
|
|
|
|
static void strbuf_append_char(char c)
|
|
{
|
|
while (strbuf_index >= strbuf_size)
|
|
strbuf_enlarge();
|
|
strbuf[strbuf_index++] = c;
|
|
}
|
|
|
|
static void strbuf_append_charp(char *s)
|
|
{
|
|
while (strbuf_index >= strbuf_size)
|
|
strbuf_enlarge();
|
|
memcpy(strbuf + strbuf_index, s, strlen(s));
|
|
strbuf_index += strlen(s);
|
|
}
|
|
|
|
%}
|
|
|
|
%x lexstr
|
|
|
|
%option 8bit stack warn noyywrap prefix="ematch_"
|
|
%%
|
|
[ \t\r\n]+
|
|
|
|
\" {
|
|
if (strbuf == NULL) {
|
|
strbuf_size = 512;
|
|
strbuf = calloc(1, strbuf_size);
|
|
if (strbuf == NULL)
|
|
return ERROR;
|
|
}
|
|
strbuf_index = 0;
|
|
|
|
BEGIN(lexstr);
|
|
}
|
|
|
|
<lexstr>\" {
|
|
BEGIN(INITIAL);
|
|
yylval.b = bstr_new(strbuf, strbuf_index);
|
|
yylval.b->quoted = 1;
|
|
return ATTRIBUTE;
|
|
}
|
|
|
|
<lexstr>\\[0-7]{1,3} { /* octal escape sequence */
|
|
int res;
|
|
|
|
sscanf(yytext + 1, "%o", &res);
|
|
if (res > 0xFF) {
|
|
fprintf(stderr, "error: octal escape sequence" \
|
|
" out of range\n");
|
|
return ERROR;
|
|
}
|
|
strbuf_append_char((unsigned char) res);
|
|
}
|
|
|
|
<lexstr>\\[0-9]+ { /* catch wrong octal escape seq. */
|
|
fprintf(stderr, "error: invalid octale escape sequence\n");
|
|
return ERROR;
|
|
}
|
|
|
|
<lexstr>\\x[0-9a-fA-F]{1,2} {
|
|
int res;
|
|
|
|
sscanf(yytext + 2, "%x", &res);
|
|
|
|
if (res > 0xFF) {
|
|
fprintf(stderr, "error: hexadecimal escape " \
|
|
"sequence out of range\n");
|
|
return ERROR;
|
|
}
|
|
strbuf_append_char((unsigned char) res);
|
|
}
|
|
|
|
<lexstr>\\n strbuf_append_char('\n');
|
|
<lexstr>\\r strbuf_append_char('\r');
|
|
<lexstr>\\t strbuf_append_char('\t');
|
|
<lexstr>\\v strbuf_append_char('\v');
|
|
<lexstr>\\b strbuf_append_char('\b');
|
|
<lexstr>\\f strbuf_append_char('\f');
|
|
<lexstr>\\a strbuf_append_char('\a');
|
|
|
|
<lexstr>\\(.|\n) strbuf_append_char(yytext[1]);
|
|
<lexstr>[^\\\n\"]+ strbuf_append_charp(yytext);
|
|
|
|
[aA][nN][dD] return AND;
|
|
[oO][rR] return OR;
|
|
[nN][oO][tT] return NOT;
|
|
"(" |
|
|
")" {
|
|
return yylval.i = *yytext;
|
|
}
|
|
[^" \t\r\n()][^ \t\r\n()]* {
|
|
yylval.b = bstr_alloc(yytext);
|
|
if (yylval.b == NULL)
|
|
return ERROR;
|
|
return ATTRIBUTE;
|
|
}
|
|
%%
|