test: allow running the tests under "prove"

[git.git] / grep.c

diff --git a/grep.c b/grep.c
index 718a3c234698d8435e1489660eeb3a1a7afa1254..63c4280cac9a87f867451c0d9787d1fe21ea9c2d 100644 (file)
--- a/grep.c
+++ b/grep.c
@@ -189,17 +189,32 @@ static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
        return compile_pattern_or(list);
 }
 
+static struct grep_expr *grep_true_expr(void)
+{
+       struct grep_expr *z = xcalloc(1, sizeof(*z));
+       z->node = GREP_NODE_TRUE;
+       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;
        struct grep_expr *header_expr;
+       struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]);
+       enum grep_header_field fld;
 
        if (!opt->header_list)
                return NULL;
        p = opt->header_list;
-       header_expr = compile_pattern_expr(&p);
-       if (p)
-               die("incomplete pattern expression: %s", p->pattern);
        for (p = opt->header_list; p; p = p->next) {
                if (p->token != GREP_PATTERN_HEAD)
                        die("bug: a non-header pattern in grep header list.");
@@ -207,6 +222,33 @@ static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
                        die("bug: unknown header field %d", p->field);
                compile_regexp(p, opt);
        }
+
+       for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++)
+               header_group[fld] = NULL;
+
+       for (p = opt->header_list; p; p = p->next) {
+               struct grep_expr *h;
+               struct grep_pat *pp = p;
+
+               h = compile_pattern_atom(&pp);
+               if (!h || pp != p->next)
+                       die("bug: malformed header expr");
+               if (!header_group[p->field]) {
+                       header_group[p->field] = h;
+                       continue;
+               }
+               header_group[p->field] = grep_or_expr(h, header_group[p->field]);
+       }
+
+       header_expr = NULL;
+
+       for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) {
+               if (!header_group[fld])
+                       continue;
+               if (!header_expr)
+                       header_expr = grep_true_expr();
+               header_expr = grep_or_expr(header_group[fld], header_expr);
+       }
        return header_expr;
 }
 
@@ -242,22 +284,18 @@ void compile_grep_patterns(struct grep_opt *opt)
        if (!header_expr)
                return;
 
-       if (opt->pattern_expression) {
-               struct grep_expr *z;
-               z = xcalloc(1, sizeof(*z));
-               z->node = GREP_NODE_OR;
-               z->u.binary.left = opt->pattern_expression;
-               z->u.binary.right = header_expr;
-               opt->pattern_expression = z;
-       } else {
+       if (!opt->pattern_expression)
                opt->pattern_expression = header_expr;
-       }
+       else
+               opt->pattern_expression = grep_or_expr(opt->pattern_expression,
+                                                      header_expr);
        opt->all_match = 1;
 }
 
 static void free_pattern_expr(struct grep_expr *x)
 {
        switch (x->node) {
+       case GREP_NODE_TRUE:
        case GREP_NODE_ATOM:
                break;
        case GREP_NODE_NOT:
@@ -486,6 +524,9 @@ static int match_expr_eval(struct grep_expr *x, char *bol, char *eol,
        if (!x)
                die("Not a valid grep expression");
        switch (x->node) {
+       case GREP_NODE_TRUE:
+               h = 1;
+               break;
        case GREP_NODE_ATOM:
                h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0);
                break;