pack cmd: seperate file line reader from file list parser

Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>

Makefile.am

@@ -25,6 +25,7 @@ EXTRA_DIST = autogen.sh
 pkg_SOURCES += main/cmd/pack/filelist.c main/cmd/pack/filelist_read.c
 pkg_SOURCES += main/cmd/pack/write_toc.c main/cmd/pack/write_files.c
 pkg_SOURCES += main/cmd/pack/pack.h main/cmd/pack/pack.c
+pkg_SOURCES += main/cmd/pack/input_file.c
 
 # dump command
 pkg_SOURCES += main/cmd/dump/dump.c main/cmd/dump/dump.h main/cmd/dump/dump_toc.c

main/cmd/pack/filelist_read.c

@@ -11,59 +11,6 @@ static const struct {
 
 #define NUM_LINE_HOOKS (sizeof(line_hooks) / sizeof(line_hooks[0]))
 
-static int prefetch_line(input_file_t *f)
-{
-	char *line = NULL;
-	size_t n = 0;
-	ssize_t ret;
-
-	free(f->line);
-	f->line = NULL;
-
-	errno = 0;
-	ret = getline(&line, &n, f->f);
-
-	if (ret < 0) {
-		if (errno != 0) {
-			perror(f->filename);
-			free(line);
-			return -1;
-		}
-		free(line);
-		return 1;
-	}
-
-	n = strlen(line);
-	while (n >0 && isspace(line[n - 1]))
-		--n;
-	line[n] = '\0';
-
-	f->line = line;
-	f->linenum += 1;
-	return 0;
-}
-
-static void cleanup_file(input_file_t *f)
-{
-	fclose(f->f);
-	free(f->line);
-}
-
-static int open_file(input_file_t *f, const char *filename)
-{
-	memset(f, 0, sizeof(*f));
-
-	f->filename = filename;
-	f->f = fopen(filename, "r");
-
-	if (f->f == NULL) {
-		perror(f->filename);
-		return -1;
-	}
-
-	return 0;
-}
-
 image_entry_t *filelist_read(const char *filename)
 {
 	image_entry_t *ent, *list = NULL;
@@ -82,11 +29,7 @@ image_entry_t *filelist_read(const char *filename)
 		if (ret > 0)
 			break;
 
-		for (ptr = f.line; isspace(*ptr); ++ptr)
-			;
-
-		if (*ptr == '\0' || *ptr == '#')
-			continue;
+		ptr = f.line;
 
 		for (i = 0; i < NUM_LINE_HOOKS; ++i) {
 			len = strlen(line_hooks[i].name);

main/cmd/pack/input_file.c

@@ -0,0 +1,65 @@
+#include "pack.h"
+
+int prefetch_line(input_file_t *f)
+{
+	char *line, *ptr;
+	ssize_t ret;
+	size_t n;
+retry:
+	free(f->line);
+	f->line = NULL;
+
+	errno = 0;
+	line = NULL;
+	n = 0;
+	ret = getline(&line, &n, f->f);
+
+	if (ret < 0) {
+		if (errno != 0) {
+			perror(f->filename);
+			free(line);
+			return -1;
+		}
+		free(line);
+		return 1;
+	}
+
+	n = strlen(line);
+	while (n >0 && isspace(line[n - 1]))
+		--n;
+	line[n] = '\0';
+
+	f->line = line;
+	f->linenum += 1;
+
+	for (ptr = f->line; isspace(*ptr); ++ptr)
+		;
+
+	if (*ptr == '\0' || *ptr == '#')
+		goto retry;
+
+	if (ptr != f->line)
+		memmove(f->line, ptr, strlen(ptr) + 1);
+	return 0;
+}
+
+void cleanup_file(input_file_t *f)
+{
+	fclose(f->f);
+	free(f->line);
+}
+
+int open_file(input_file_t *f, const char *filename)
+{
+	memset(f, 0, sizeof(*f));
+
+	f->filename = filename;
+	f->f = fopen(filename, "r");
+
+	if (f->f == NULL) {
+		perror(f->filename);
+		return -1;
+	}
+
+	return 0;
+}

main/cmd/pack/pack.h

@@ -40,4 +40,10 @@ int write_toc(pkg_writer_t *wr, image_entry_t *list, compressor_t *cmp);
 
 int write_files(pkg_writer_t *wr, image_entry_t *list, compressor_t *cmp);
 
+int prefetch_line(input_file_t *f);
+
+void cleanup_file(input_file_t *f);
+
+int open_file(input_file_t *f, const char *filename);
+
 #endif /* PACK_H */