forked from Minki/linux
59a08b4b3b
Copy/paste leftover from recent refactor.
Fixes: 26226a9772 ("perf expr: Move expr lexer to flex")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200315155609.603948-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
115 lines
1.9 KiB
Plaintext
115 lines
1.9 KiB
Plaintext
%option prefix="expr_"
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%option reentrant
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%option bison-bridge
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%{
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#include <linux/compiler.h>
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#include "expr.h"
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#include "expr-bison.h"
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char *expr_get_text(yyscan_t yyscanner);
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YYSTYPE *expr_get_lval(yyscan_t yyscanner);
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static int __value(YYSTYPE *yylval, char *str, int base, int token)
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{
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u64 num;
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errno = 0;
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num = strtoull(str, NULL, base);
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if (errno)
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return EXPR_ERROR;
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yylval->num = num;
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return token;
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}
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static int value(yyscan_t scanner, int base)
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{
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YYSTYPE *yylval = expr_get_lval(scanner);
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char *text = expr_get_text(scanner);
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return __value(yylval, text, base, NUMBER);
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}
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/*
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* Allow @ instead of / to be able to specify pmu/event/ without
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* conflicts with normal division.
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*/
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static char *normalize(char *str)
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{
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char *ret = str;
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char *dst = str;
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while (*str) {
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if (*str == '@')
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*dst++ = '/';
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else if (*str == '\\')
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*dst++ = *++str;
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else
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*dst++ = *str;
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str++;
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}
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*dst = 0x0;
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return ret;
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}
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static int str(yyscan_t scanner, int token)
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{
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YYSTYPE *yylval = expr_get_lval(scanner);
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char *text = expr_get_text(scanner);
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yylval->str = normalize(strdup(text));
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if (!yylval->str)
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return EXPR_ERROR;
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yylval->str = normalize(yylval->str);
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return token;
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}
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%}
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number [0-9]+
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sch [-,=]
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spec \\{sch}
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sym [0-9a-zA-Z_\.:@]+
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symbol {spec}*{sym}*{spec}*{sym}*
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%%
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{
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int start_token;
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start_token = expr_get_extra(yyscanner);
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if (start_token) {
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expr_set_extra(NULL, yyscanner);
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return start_token;
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}
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}
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max { return MAX; }
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min { return MIN; }
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if { return IF; }
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else { return ELSE; }
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#smt_on { return SMT_ON; }
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{number} { return value(yyscanner, 10); }
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{symbol} { return str(yyscanner, ID); }
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"|" { return '|'; }
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"^" { return '^'; }
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"&" { return '&'; }
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"-" { return '-'; }
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"+" { return '+'; }
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"*" { return '*'; }
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"/" { return '/'; }
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"%" { return '%'; }
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"(" { return '('; }
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")" { return ')'; }
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"," { return ','; }
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. { }
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%%
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int expr_wrap(void *scanner __maybe_unused)
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{
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return 1;
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}
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