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871f9f599d
Add the expr_scanner_ctx object to hold user data for the expr scanner. Currently it holds only start_token, Kajol Jain will use it to hold 24x7 runtime param. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Anju T Sudhakar <anju@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Joe Mario <jmario@redhat.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Cc: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lore.kernel.org/lkml/20200401203340.31402-3-kjain@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
115 lines
2 KiB
Plaintext
115 lines
2 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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struct expr_scanner_ctx *sctx = expr_get_extra(yyscanner);
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{
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int start_token = sctx->start_token;
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if (sctx->start_token) {
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sctx->start_token = 0;
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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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