diff options
Diffstat (limited to 'tools/perf/util/expr.y')
| -rw-r--r-- | tools/perf/util/expr.y | 185 |
1 files changed, 31 insertions, 154 deletions
diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y index 7d226241f1d7..4720cbe79357 100644 --- a/tools/perf/util/expr.y +++ b/tools/perf/util/expr.y @@ -1,31 +1,32 @@ /* Simple expression parser */ %{ +#define YYDEBUG 1 +#include <stdio.h> #include "util.h" #include "util/debug.h" #include <stdlib.h> // strtod() #define IN_EXPR_Y 1 #include "expr.h" #include "smt.h" -#include <assert.h> #include <string.h> -#define MAXIDLEN 256 %} %define api.pure full %parse-param { double *final_val } %parse-param { struct parse_ctx *ctx } -%parse-param { const char **pp } -%lex-param { const char **pp } +%parse-param {void *scanner} +%lex-param {void* scanner} %union { - double num; - char id[MAXIDLEN+1]; + double num; + char *str; } +%token EXPR_PARSE EXPR_OTHER EXPR_ERROR %token <num> NUMBER -%token <id> ID +%token <str> ID %token MIN MAX IF ELSE SMT_ON %left MIN MAX IF %left '|' @@ -37,11 +38,9 @@ %type <num> expr if_expr %{ -static int expr__lex(YYSTYPE *res, const char **pp); - -static void expr__error(double *final_val __maybe_unused, +static void expr_error(double *final_val __maybe_unused, struct parse_ctx *ctx __maybe_unused, - const char **pp __maybe_unused, + void *scanner, const char *s) { pr_debug("%s\n", s); @@ -63,6 +62,27 @@ static int lookup_id(struct parse_ctx *ctx, char *id, double *val) %} %% +start: +EXPR_PARSE all_expr +| +EXPR_OTHER all_other + +all_other: all_other other +| + +other: ID +{ + if (ctx->num_ids + 1 >= EXPR_MAX_OTHER) { + pr_err("failed: way too many variables"); + YYABORT; + } + + ctx->ids[ctx->num_ids++].name = $1; +} +| +MIN | MAX | IF | ELSE | SMT_ON | NUMBER | '|' | '^' | '&' | '-' | '+' | '*' | '/' | '%' | '(' | ')' + + all_expr: if_expr { *final_val = $1; } ; @@ -93,146 +113,3 @@ expr: NUMBER ; %% - -static int expr__symbol(YYSTYPE *res, const char *p, const char **pp) -{ - char *dst = res->id; - const char *s = p; - - if (*p == '#') - *dst++ = *p++; - - while (isalnum(*p) || *p == '_' || *p == '.' || *p == ':' || *p == '@' || *p == '\\') { - if (p - s >= MAXIDLEN) - return -1; - /* - * Allow @ instead of / to be able to specify pmu/event/ without - * conflicts with normal division. - */ - if (*p == '@') - *dst++ = '/'; - else if (*p == '\\') - *dst++ = *++p; - else - *dst++ = *p; - p++; - } - *dst = 0; - *pp = p; - dst = res->id; - switch (dst[0]) { - case 'm': - if (!strcmp(dst, "min")) - return MIN; - if (!strcmp(dst, "max")) - return MAX; - break; - case 'i': - if (!strcmp(dst, "if")) - return IF; - break; - case 'e': - if (!strcmp(dst, "else")) - return ELSE; - break; - case '#': - if (!strcasecmp(dst, "#smt_on")) - return SMT_ON; - break; - } - return ID; -} - -static int expr__lex(YYSTYPE *res, const char **pp) -{ - int tok; - const char *s; - const char *p = *pp; - - while (isspace(*p)) - p++; - s = p; - switch (*p++) { - case '#': - case 'a' ... 'z': - case 'A' ... 'Z': - return expr__symbol(res, p - 1, pp); - case '0' ... '9': case '.': - res->num = strtod(s, (char **)&p); - tok = NUMBER; - break; - default: - tok = *s; - break; - } - *pp = p; - return tok; -} - -/* Caller must make sure id is allocated */ -void expr__add_id(struct parse_ctx *ctx, const char *name, double val) -{ - int idx; - assert(ctx->num_ids < MAX_PARSE_ID); - idx = ctx->num_ids++; - ctx->ids[idx].name = name; - ctx->ids[idx].val = val; -} - -void expr__ctx_init(struct parse_ctx *ctx) -{ - ctx->num_ids = 0; -} - -static bool already_seen(const char *val, const char *one, const char **other, - int num_other) -{ - int i; - - if (one && !strcasecmp(one, val)) - return true; - for (i = 0; i < num_other; i++) - if (!strcasecmp(other[i], val)) - return true; - return false; -} - -int expr__find_other(const char *p, const char *one, const char ***other, - int *num_otherp) -{ - const char *orig = p; - int err = -1; - int num_other; - - *other = malloc((EXPR_MAX_OTHER + 1) * sizeof(char *)); - if (!*other) - return -1; - - num_other = 0; - for (;;) { - YYSTYPE val; - int tok = expr__lex(&val, &p); - if (tok == 0) { - err = 0; - break; - } - if (tok == ID && !already_seen(val.id, one, *other, num_other)) { - if (num_other >= EXPR_MAX_OTHER - 1) { - pr_debug("Too many extra events in %s\n", orig); - break; - } - (*other)[num_other] = strdup(val.id); - if (!(*other)[num_other]) - return -1; - num_other++; - } - } - (*other)[num_other] = NULL; - *num_otherp = num_other; - if (err) { - *num_otherp = 0; - free(*other); - *other = NULL; - } - return err; -} |