filter: split filter functions into their own file

A first step for more interesting things.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

5 files changed, 90 insertions, 71 deletions

diff --git a/cgit.c b/cgit.c
index d74b0f3..0be41b8 100644
--- a/cgit.c
+++ b/cgit.c
@@ -27,36 +27,6 @@ static void add_mimetype(const char *name, const char *value)
 	item->util = xstrdup(value);
 }
 
-static struct cgit_filter *new_filter(const char *cmd, filter_type filtertype)
-{
-	struct cgit_filter *f;
-	int args_size = 0;
-	int extra_args;
-
-	if (!cmd || !cmd[0])
-		return NULL;
-
-	switch (filtertype) {
-		case SOURCE:
-		case ABOUT:
-			extra_args = 1;
-			break;
-
-		case COMMIT:
-		default:
-			extra_args = 0;
-			break;
-	}
-
-	f = xmalloc(sizeof(struct cgit_filter));
-	f->cmd = xstrdup(cmd);
-	args_size = (2 + extra_args) * sizeof(char *);
-	f->argv = xmalloc(args_size);
-	memset(f->argv, 0, args_size);
-	f->argv[0] = f->cmd;
-	return f;
-}
-
 static void process_cached_repolist(const char *path);
 
 static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
@@ -114,11 +84,11 @@ static void repo_config(struct cgit_repo *repo, const char *name, const char *va
 		repo->logo_link = xstrdup(value);
 	else if (ctx.cfg.enable_filter_overrides) {
 		if (!strcmp(name, "about-filter"))
-			repo->about_filter = new_filter(value, ABOUT);
+			repo->about_filter = cgit_new_filter(value, ABOUT);
 		else if (!strcmp(name, "commit-filter"))
-			repo->commit_filter = new_filter(value, COMMIT);
+			repo->commit_filter = cgit_new_filter(value, COMMIT);
 		else if (!strcmp(name, "source-filter"))
-			repo->source_filter = new_filter(value, SOURCE);
+			repo->source_filter = cgit_new_filter(value, SOURCE);
 	}
 }
 
@@ -215,9 +185,9 @@ static void config_cb(const char *name, const char *value)
 	else if (!strcmp(name, "case-sensitive-sort"))
 		ctx.cfg.case_sensitive_sort = atoi(value);
 	else if (!strcmp(name, "about-filter"))
-		ctx.cfg.about_filter = new_filter(value, ABOUT);
+		ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
 	else if (!strcmp(name, "commit-filter"))
-		ctx.cfg.commit_filter = new_filter(value, COMMIT);
+		ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
 	else if (!strcmp(name, "embedded"))
 		ctx.cfg.embedded = atoi(value);
 	else if (!strcmp(name, "max-atom-items"))
@@ -251,7 +221,7 @@ static void config_cb(const char *name, const char *value)
 	else if (!strcmp(name, "section-sort"))
 		ctx.cfg.section_sort = atoi(value);
 	else if (!strcmp(name, "source-filter"))
-		ctx.cfg.source_filter = new_filter(value, SOURCE);
+		ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
 	else if (!strcmp(name, "summary-log"))
 		ctx.cfg.summary_log = atoi(value);
 	else if (!strcmp(name, "summary-branches"))
diff --git a/cgit.h b/cgit.h
index f7b606c..a72c503 100644
--- a/cgit.h
+++ b/cgit.h
@@ -344,6 +344,7 @@ extern int cgit_parse_snapshots_mask(const char *str);
 
 extern int cgit_open_filter(struct cgit_filter *filter);
 extern int cgit_close_filter(struct cgit_filter *filter);
+extern struct cgit_filter *cgit_new_filter(const char *cmd, filter_type filtertype);
 
 extern void cgit_prepare_repo_env(struct cgit_repo * repo);
 
diff --git a/cgit.mk b/cgit.mk
index b5cc7a2..19a76e7 100644
--- a/cgit.mk
+++ b/cgit.mk
@@ -29,6 +29,7 @@ CGIT_OBJ_NAMES += cgit.o
 CGIT_OBJ_NAMES += cache.o
 CGIT_OBJ_NAMES += cmd.o
 CGIT_OBJ_NAMES += configfile.o
+CGIT_OBJ_NAMES += filter.o
 CGIT_OBJ_NAMES += html.o
 CGIT_OBJ_NAMES += parsing.o
 CGIT_OBJ_NAMES += scan-tree.o
diff --git a/filter.c b/filter.c
new file mode 100644
index 0000000..f4ee9ac
--- /dev/null
+++ b/filter.c
@@ -0,0 +1,82 @@
+/* filter.c: filter framework functions
+ *
+ * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
+ *
+ * Licensed under GNU General Public License v2
+ *   (see COPYING for full license text)
+ */
+
+#include "cgit.h"
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+int cgit_open_filter(struct cgit_filter *filter)
+{
+	filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
+		"Unable to duplicate STDOUT");
+	chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
+	filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
+	if (filter->pid == 0) {
+		close(filter->pipe_fh[1]);
+		chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
+			"Unable to use pipe as STDIN");
+		execvp(filter->cmd, filter->argv);
+		die_errno("Unable to exec subprocess %s", filter->cmd);
+	}
+	close(filter->pipe_fh[0]);
+	chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
+		"Unable to use pipe as STDOUT");
+	close(filter->pipe_fh[1]);
+	return 0;
+}
+
+
+int cgit_close_filter(struct cgit_filter *filter)
+{
+	int exit_status;
+
+	chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
+		"Unable to restore STDOUT");
+	close(filter->old_stdout);
+	if (filter->pid < 0)
+		return 0;
+	waitpid(filter->pid, &exit_status, 0);
+	if (WIFEXITED(exit_status) && !WEXITSTATUS(exit_status))
+		return 0;
+	die("Subprocess %s exited abnormally", filter->cmd);
+}
+
+struct cgit_filter *cgit_new_filter(const char *cmd, filter_type filtertype)
+{
+	struct cgit_filter *f;
+	int args_size = 0;
+	int extra_args;
+
+	if (!cmd || !cmd[0])
+		return NULL;
+
+	switch (filtertype) {
+		case SOURCE:
+		case ABOUT:
+			extra_args = 1;
+			break;
+
+		case COMMIT:
+		default:
+			extra_args = 0;
+			break;
+	}
+	
+	f = xmalloc(sizeof(struct cgit_filter));
+	memset(f, 0, sizeof(struct cgit_filter));
+
+	f->cmd = xstrdup(cmd);
+	args_size = (2 + extra_args) * sizeof(char *);
+	f->argv = xmalloc(args_size);
+	memset(f->argv, 0, args_size);
+	f->argv[0] = f->cmd;
+	return f;
+}
diff --git a/shared.c b/shared.c
index 6259d75..4626148 100644
--- a/shared.c
+++ b/shared.c
@@ -457,41 +457,6 @@ void cgit_prepare_repo_env(struct cgit_repo * repo)
 			fprintf(stderr, warn, p->name, p->value);
 }
 
-int cgit_open_filter(struct cgit_filter *filter)
-{
-	filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
-		"Unable to duplicate STDOUT");
-	chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
-	filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
-	if (filter->pid == 0) {
-		close(filter->pipe_fh[1]);
-		chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
-			"Unable to use pipe as STDIN");
-		execvp(filter->cmd, filter->argv);
-		die_errno("Unable to exec subprocess %s", filter->cmd);
-	}
-	close(filter->pipe_fh[0]);
-	chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
-		"Unable to use pipe as STDOUT");
-	close(filter->pipe_fh[1]);
-	return 0;
-}
-
-int cgit_close_filter(struct cgit_filter *filter)
-{
-	int exit_status;
-
-	chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
-		"Unable to restore STDOUT");
-	close(filter->old_stdout);
-	if (filter->pid < 0)
-		return 0;
-	waitpid(filter->pid, &exit_status, 0);
-	if (WIFEXITED(exit_status) && !WEXITSTATUS(exit_status))
-		return 0;
-	die("Subprocess %s exited abnormally", filter->cmd);
-}
-
 /* Read the content of the specified file into a newly allocated buffer,
  * zeroterminate the buffer and return 0 on success, errno otherwise.
  */