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authorStefan Eßer <se@FreeBSD.org>2011-07-09 12:20:15 +0000
committerStefan Eßer <se@FreeBSD.org>2011-07-09 12:20:15 +0000
commit69759f0829c3274f38a92f0a956b324c5bc9e908 (patch)
tree7e870cf206459013dff931da3e2732a647f331e0 /bin/expr/expr.y
parent6fbe7bf4f28203afb9f07af23d6beb21c3db34a4 (diff)
downloadsrc-69759f0829c3274f38a92f0a956b324c5bc9e908.tar.gz
src-69759f0829c3274f38a92f0a956b324c5bc9e908.zip
Fix style, since this file has just been touched in a major way.
No actual code changes.
Notes
Notes: svn path=/head/; revision=223883
Diffstat (limited to 'bin/expr/expr.y')
-rw-r--r--bin/expr/expr.y171
1 files changed, 75 insertions, 96 deletions
diff --git a/bin/expr/expr.y b/bin/expr/expr.y
index f2053634e7e5..89f8cced337c 100644
--- a/bin/expr/expr.y
+++ b/bin/expr/expr.y
@@ -1,6 +1,6 @@
%{
/*-
- * Written by Pace Willisson (pace@blitz.com)
+ * Written by Pace Willisson (pace@blitz.com)
* and placed in the public domain.
*
* Largely rewritten by J.T. Conklin (jtc@wimsey.com)
@@ -21,7 +21,7 @@
#include <string.h>
#include <regex.h>
#include <unistd.h>
-
+
/*
* POSIX specifies a specific error code for syntax errors. We exit
* with this code for all errors.
@@ -42,7 +42,7 @@ struct val {
char **av;
int nonposix;
-struct val *result;
+struct val *result;
void assert_to_integer(struct val *);
void assert_div(intmax_t, intmax_t);
@@ -52,7 +52,7 @@ void assert_times(intmax_t, intmax_t, intmax_t);
int compare_vals(struct val *, struct val *);
void free_value(struct val *);
int is_integer(const char *);
-int isstring(struct val *);
+int is_string(struct val *);
int is_zero_or_null(struct val *);
struct val *make_integer(intmax_t);
struct val *make_str(const char *);
@@ -99,23 +99,22 @@ start: expr { result = $$; }
expr: TOKEN
| '(' expr ')' { $$ = $2; }
- | expr '|' expr { $$ = op_or ($1, $3); }
- | expr '&' expr { $$ = op_and ($1, $3); }
- | expr '=' expr { $$ = op_eq ($1, $3); }
- | expr '>' expr { $$ = op_gt ($1, $3); }
- | expr '<' expr { $$ = op_lt ($1, $3); }
- | expr GE expr { $$ = op_ge ($1, $3); }
- | expr LE expr { $$ = op_le ($1, $3); }
- | expr NE expr { $$ = op_ne ($1, $3); }
- | expr '+' expr { $$ = op_plus ($1, $3); }
- | expr '-' expr { $$ = op_minus ($1, $3); }
- | expr '*' expr { $$ = op_times ($1, $3); }
- | expr '/' expr { $$ = op_div ($1, $3); }
- | expr '%' expr { $$ = op_rem ($1, $3); }
- | expr ':' expr { $$ = op_colon ($1, $3); }
+ | expr '|' expr { $$ = op_or($1, $3); }
+ | expr '&' expr { $$ = op_and($1, $3); }
+ | expr '=' expr { $$ = op_eq($1, $3); }
+ | expr '>' expr { $$ = op_gt($1, $3); }
+ | expr '<' expr { $$ = op_lt($1, $3); }
+ | expr GE expr { $$ = op_ge($1, $3); }
+ | expr LE expr { $$ = op_le($1, $3); }
+ | expr NE expr { $$ = op_ne($1, $3); }
+ | expr '+' expr { $$ = op_plus($1, $3); }
+ | expr '-' expr { $$ = op_minus($1, $3); }
+ | expr '*' expr { $$ = op_times($1, $3); }
+ | expr '/' expr { $$ = op_div($1, $3); }
+ | expr '%' expr { $$ = op_rem($1, $3); }
+ | expr ':' expr { $$ = op_colon($1, $3); }
;
-
%%
struct val *
@@ -123,14 +122,13 @@ make_integer(intmax_t i)
{
struct val *vp;
- vp = (struct val *) malloc (sizeof (*vp));
- if (vp == NULL) {
+ vp = (struct val *)malloc(sizeof(*vp));
+ if (vp == NULL)
errx(ERR_EXIT, "malloc() failed");
- }
vp->type = integer;
vp->u.i = i;
- return vp;
+ return (vp);
}
struct val *
@@ -138,28 +136,25 @@ make_str(const char *s)
{
struct val *vp;
- vp = (struct val *) malloc (sizeof (*vp));
- if (vp == NULL || ((vp->u.s = strdup (s)) == NULL)) {
+ vp = (struct val *)malloc(sizeof(*vp));
+ if (vp == NULL || ((vp->u.s = strdup(s)) == NULL))
errx(ERR_EXIT, "malloc() failed");
- }
if (is_integer(s))
vp->type = numeric_string;
else
vp->type = string;
- return vp;
+ return (vp);
}
-
void
free_value(struct val *vp)
{
if (vp->type == string || vp->type == numeric_string)
- free (vp->u.s);
+ free(vp->u.s);
}
-
int
to_integer(struct val *vp)
{
@@ -171,7 +166,7 @@ to_integer(struct val *vp)
i = strtoimax(vp->u.s, (char **)NULL, 10);
/* just keep as numeric_string, if the conversion fails */
if (errno != ERANGE) {
- free (vp->u.s);
+ free(vp->u.s);
vp->u.i = i;
vp->type = integer;
}
@@ -179,7 +174,6 @@ to_integer(struct val *vp)
return (vp->type == integer);
}
-
void
assert_to_integer(struct val *vp)
{
@@ -212,7 +206,6 @@ to_string(struct val *vp)
vp->u.s = tmp;
}
-
int
is_integer(const char *s)
{
@@ -231,15 +224,13 @@ is_integer(const char *s)
return (*s == '\0');
}
-
int
-isstring(struct val *vp)
+is_string(struct val *vp)
{
/* only TRUE if this string is not a valid integer */
return (vp->type == string);
}
-
int
yylex(void)
{
@@ -250,10 +241,10 @@ yylex(void)
p = *av++;
- if (strlen (p) == 1) {
- if (strchr ("|&=<>+-*/%:()", *p))
+ if (strlen(p) == 1) {
+ if (strchr("|&=<>+-*/%:()", *p))
return (*p);
- } else if (strlen (p) == 2 && p[1] == '=') {
+ } else if (strlen(p) == 2 && p[1] == '=') {
switch (*p) {
case '>': return (GE);
case '<': return (LE);
@@ -261,19 +252,17 @@ yylex(void)
}
}
- yylval.val = make_str (p);
+ yylval.val = make_str(p);
return (TOKEN);
}
int
is_zero_or_null(struct val *vp)
{
- if (vp->type == integer) {
+ if (vp->type == integer)
return (vp->u.i == 0);
- } else {
- return (*vp->u.s == 0 || (to_integer (vp) && vp->u.i == 0));
- }
- /* NOTREACHED */
+
+ return (*vp->u.s == 0 || (to_integer(vp) && vp->u.i == 0));
}
int
@@ -281,23 +270,22 @@ main(int argc, char *argv[])
{
int c;
- setlocale (LC_ALL, "");
+ setlocale(LC_ALL, "");
if (getenv("EXPR_COMPAT") != NULL
|| check_utility_compat("expr")) {
av = argv + 1;
nonposix = 1;
} else {
- while ((c = getopt(argc, argv, "e")) != -1)
+ while ((c = getopt(argc, argv, "e")) != -1) {
switch (c) {
case 'e':
nonposix = 1;
break;
-
default:
- fprintf(stderr,
+ errx(ERR_EXIT,
"usage: expr [-e] expression\n");
- exit(ERR_EXIT);
}
+ }
av = argv + optind;
}
@@ -317,7 +305,6 @@ yyerror(const char *s __unused)
errx(ERR_EXIT, "syntax error");
}
-
struct val *
op_or(struct val *a, struct val *b)
{
@@ -335,12 +322,12 @@ op_or(struct val *a, struct val *b)
struct val *
op_and(struct val *a, struct val *b)
{
- if (is_zero_or_null (a) || is_zero_or_null (b)) {
- free_value (a);
- free_value (b);
- return (make_integer ((intmax_t)0));
+ if (is_zero_or_null(a) || is_zero_or_null(b)) {
+ free_value(a);
+ free_value(b);
+ return (make_integer((intmax_t)0));
} else {
- free_value (b);
+ free_value(b);
return (a);
}
}
@@ -350,7 +337,7 @@ compare_vals(struct val *a, struct val *b)
{
int r;
- if (isstring(a) || isstring(b)) {
+ if (is_string(a) || is_string(b)) {
to_string(a);
to_string(b);
r = strcoll(a->u.s, b->u.s);
@@ -425,19 +412,17 @@ op_plus(struct val *a, struct val *b)
assert_to_integer(a);
assert_to_integer(b);
-
r = make_integer(a->u.i + b->u.i);
assert_plus(a->u.i, b->u.i, r->u.i);
- free_value (a);
- free_value (b);
- return r;
+ free_value(a);
+ free_value(b);
+ return (r);
}
void
assert_minus(intmax_t a, intmax_t b, intmax_t r)
{
-
/* special case subtraction of INTMAX_MIN */
if (b == INTMAX_MIN && a < 0)
errx(ERR_EXIT, "overflow");
@@ -452,13 +437,12 @@ op_minus(struct val *a, struct val *b)
assert_to_integer(a);
assert_to_integer(b);
-
r = make_integer(a->u.i - b->u.i);
assert_minus(a->u.i, b->u.i, r->u.i);
- free_value (a);
- free_value (b);
- return r;
+ free_value(a);
+ free_value(b);
+ return (r);
}
void
@@ -479,12 +463,11 @@ op_times(struct val *a, struct val *b)
assert_to_integer(a);
assert_to_integer(b);
-
r = make_integer(a->u.i * b->u.i);
assert_times(a->u.i, b->u.i, r->u.i);
- free_value (a);
- free_value (b);
+ free_value(a);
+ free_value(b);
return (r);
}
@@ -505,16 +488,15 @@ op_div(struct val *a, struct val *b)
assert_to_integer(a);
assert_to_integer(b);
-
/* assert based on operands only, not on result */
assert_div(a->u.i, b->u.i);
r = make_integer(a->u.i / b->u.i);
- free_value (a);
- free_value (b);
- return r;
+ free_value(a);
+ free_value(b);
+ return (r);
}
-
+
struct val *
op_rem(struct val *a, struct val *b)
{
@@ -526,11 +508,11 @@ op_rem(struct val *a, struct val *b)
assert_div(1, b->u.i);
r = make_integer(a->u.i % b->u.i);
- free_value (a);
- free_value (b);
- return r;
+ free_value(a);
+ free_value(b);
+ return (r);
}
-
+
struct val *
op_colon(struct val *a, struct val *b)
{
@@ -545,33 +527,30 @@ op_colon(struct val *a, struct val *b)
to_string(b);
/* compile regular expression */
- if ((eval = regcomp (&rp, b->u.s, 0)) != 0) {
- regerror (eval, &rp, errbuf, sizeof(errbuf));
+ if ((eval = regcomp(&rp, b->u.s, 0)) != 0) {
+ regerror(eval, &rp, errbuf, sizeof(errbuf));
errx(ERR_EXIT, "%s", errbuf);
}
/* compare string against pattern */
/* remember that patterns are anchored to the beginning of the line */
- if (regexec(&rp, a->u.s, (size_t)2, rm, 0) == 0 && rm[0].rm_so == 0) {
+ if (regexec(&rp, a->u.s, (size_t)2, rm, 0) == 0 && rm[0].rm_so == 0)
if (rm[1].rm_so >= 0) {
*(a->u.s + rm[1].rm_eo) = '\0';
- v = make_str (a->u.s + rm[1].rm_so);
+ v = make_str(a->u.s + rm[1].rm_so);
- } else {
- v = make_integer ((intmax_t)(rm[0].rm_eo - rm[0].rm_so));
- }
- } else {
- if (rp.re_nsub == 0) {
- v = make_integer ((intmax_t)0);
- } else {
- v = make_str ("");
- }
- }
+ } else
+ v = make_integer((intmax_t)(rm[0].rm_eo - rm[0].rm_so));
+ else
+ if (rp.re_nsub == 0)
+ v = make_integer((intmax_t)0);
+ else
+ v = make_str("");
/* free arguments and pattern buffer */
- free_value (a);
- free_value (b);
- regfree (&rp);
+ free_value(a);
+ free_value(b);
+ regfree(&rp);
- return v;
+ return (v);
}