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-rw-r--r--grep.c70
1 files changed, 36 insertions, 34 deletions
diff --git a/grep.c b/grep.c
index 7bb0360869..5bec7fd793 100644
--- a/grep.c
+++ b/grep.c
@@ -595,6 +595,35 @@ static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
}
}
+static struct grep_expr *grep_not_expr(struct grep_expr *expr)
+{
+ struct grep_expr *z = xcalloc(1, sizeof(*z));
+ z->node = GREP_NODE_NOT;
+ z->u.unary = expr;
+ return z;
+}
+
+static struct grep_expr *grep_binexp(enum grep_expr_node kind,
+ struct grep_expr *left,
+ struct grep_expr *right)
+{
+ struct grep_expr *z = xcalloc(1, sizeof(*z));
+ z->node = kind;
+ z->u.binary.left = left;
+ z->u.binary.right = right;
+ return z;
+}
+
+static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right)
+{
+ return grep_binexp(GREP_NODE_OR, left, right);
+}
+
+static struct grep_expr *grep_and_expr(struct grep_expr *left, struct grep_expr *right)
+{
+ return grep_binexp(GREP_NODE_AND, left, right);
+}
+
static struct grep_expr *compile_pattern_or(struct grep_pat **);
static struct grep_expr *compile_pattern_atom(struct grep_pat **list)
{
@@ -638,12 +667,10 @@ static struct grep_expr *compile_pattern_not(struct grep_pat **list)
if (!p->next)
die("--not not followed by pattern expression");
*list = p->next;
- CALLOC_ARRAY(x, 1);
- x->node = GREP_NODE_NOT;
- x->u.unary = compile_pattern_not(list);
- if (!x->u.unary)
+ x = compile_pattern_not(list);
+ if (!x)
die("--not followed by non pattern expression");
- return x;
+ return grep_not_expr(x);
default:
return compile_pattern_atom(list);
}
@@ -652,7 +679,7 @@ static struct grep_expr *compile_pattern_not(struct grep_pat **list)
static struct grep_expr *compile_pattern_and(struct grep_pat **list)
{
struct grep_pat *p;
- struct grep_expr *x, *y, *z;
+ struct grep_expr *x, *y;
x = compile_pattern_not(list);
p = *list;
@@ -665,11 +692,7 @@ static struct grep_expr *compile_pattern_and(struct grep_pat **list)
y = compile_pattern_and(list);
if (!y)
die("--and not followed by pattern expression");
- CALLOC_ARRAY(z, 1);
- z->node = GREP_NODE_AND;
- z->u.binary.left = x;
- z->u.binary.right = y;
- return z;
+ return grep_and_expr(x, y);
}
return x;
}
@@ -677,7 +700,7 @@ static struct grep_expr *compile_pattern_and(struct grep_pat **list)
static struct grep_expr *compile_pattern_or(struct grep_pat **list)
{
struct grep_pat *p;
- struct grep_expr *x, *y, *z;
+ struct grep_expr *x, *y;
x = compile_pattern_and(list);
p = *list;
@@ -685,11 +708,7 @@ static struct grep_expr *compile_pattern_or(struct grep_pat **list)
y = compile_pattern_or(list);
if (!y)
die("not a pattern expression %s", p->pattern);
- CALLOC_ARRAY(z, 1);
- z->node = GREP_NODE_OR;
- z->u.binary.left = x;
- z->u.binary.right = y;
- return z;
+ return grep_or_expr(x, y);
}
return x;
}
@@ -699,14 +718,6 @@ static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
return compile_pattern_or(list);
}
-static struct grep_expr *grep_not_expr(struct grep_expr *expr)
-{
- struct grep_expr *z = xcalloc(1, sizeof(*z));
- z->node = GREP_NODE_NOT;
- z->u.unary = expr;
- return z;
-}
-
static struct grep_expr *grep_true_expr(void)
{
struct grep_expr *z = xcalloc(1, sizeof(*z));
@@ -714,15 +725,6 @@ static struct grep_expr *grep_true_expr(void)
return z;
}
-static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right)
-{
- struct grep_expr *z = xcalloc(1, sizeof(*z));
- z->node = GREP_NODE_OR;
- z->u.binary.left = left;
- z->u.binary.right = right;
- return z;
-}
-
static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
{
struct grep_pat *p;