Import cgit prototype from git tree

This enables basic cgit functionality, using libgit.a and xdiff/lib.a from
git + a custom "git.h" + openssl for sha1 routines.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 399 insertions, 0 deletions

diff --git a/git.h b/git.h
new file mode 100644
index 0000000..443f216
--- /dev/null
+++ b/git.h
@@ -0,0 +1,399 @@
+#ifndef GIT_H
+#define GIT_H
+
+
+/*
+ * from git:git-compat-util.h 
+ */
+
+
+#ifndef FLEX_ARRAY
+#if defined(__GNUC__) && (__GNUC__ < 3)
+#define FLEX_ARRAY 0
+#else
+#define FLEX_ARRAY /* empty */
+#endif
+#endif
+
+
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+#include <limits.h>
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <time.h>
+
+
+static inline char* xstrdup(const char *str)
+{
+	char *ret = strdup(str);
+	if (!ret)
+		die("Out of memory, strdup failed");
+	return ret;
+}
+
+static inline void *xmalloc(size_t size)
+{
+	void *ret = malloc(size);
+	if (!ret && !size)
+		ret = malloc(1);
+	if (!ret)
+		die("Out of memory, malloc failed");
+#ifdef XMALLOC_POISON
+	memset(ret, 0xA5, size);
+#endif
+	return ret;
+}
+
+static inline void *xrealloc(void *ptr, size_t size)
+{
+	void *ret = realloc(ptr, size);
+	if (!ret && !size)
+		ret = realloc(ptr, 1);
+	if (!ret)
+		die("Out of memory, realloc failed");
+	return ret;
+}
+
+static inline void *xcalloc(size_t nmemb, size_t size)
+{
+	void *ret = calloc(nmemb, size);
+	if (!ret && (!nmemb || !size))
+		ret = calloc(1, 1);
+	if (!ret)
+		die("Out of memory, calloc failed");
+	return ret;
+}
+
+static inline ssize_t xread(int fd, void *buf, size_t len)
+{
+	ssize_t nr;
+	while (1) {
+		nr = read(fd, buf, len);
+		if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
+			continue;
+		return nr;
+	}
+}
+
+static inline ssize_t xwrite(int fd, const void *buf, size_t len)
+{
+	ssize_t nr;
+	while (1) {
+		nr = write(fd, buf, len);
+		if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
+			continue;
+		return nr;
+	}
+}
+
+
+
+
+/*
+ * from git:cache.h
+ */
+
+
+/* Convert to/from hex/sha1 representation */
+#define MINIMUM_ABBREV 4
+#define DEFAULT_ABBREV 7
+
+
+extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size);
+
+
+
+
+/*
+ * from git:object.h 
+ */
+
+struct object_list {
+	struct object *item;
+	struct object_list *next;
+};
+
+struct object_refs {
+	unsigned count;
+	struct object *base;
+	struct object *ref[FLEX_ARRAY]; /* more */
+};
+
+struct object_array {
+	unsigned int nr;
+	unsigned int alloc;
+	struct object_array_entry {
+		struct object *item;
+		const char *name;
+	} *objects;
+};
+
+#define TYPE_BITS   3
+#define FLAG_BITS  27
+
+/*
+ * The object type is stored in 3 bits.
+ */
+struct object {
+	unsigned parsed : 1;
+	unsigned used : 1;
+	unsigned type : TYPE_BITS;
+	unsigned flags : FLAG_BITS;
+	unsigned char sha1[20];
+};
+
+
+/*
+ * from git:tree.h
+ */
+
+struct tree {
+	struct object object;
+	void *buffer;
+	unsigned long size;
+};
+
+
+
+
+/* from git:commit.h */
+
+struct commit_list {
+	struct commit *item;
+	struct commit_list *next;
+};
+
+struct commit {
+	struct object object;
+	void *util;
+	unsigned long date;
+	struct commit_list *parents;
+	struct tree *tree;
+	char *buffer;
+};
+
+
+/* Commit formats */
+enum cmit_fmt {
+	CMIT_FMT_RAW,
+	CMIT_FMT_MEDIUM,
+	CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM,
+	CMIT_FMT_SHORT,
+	CMIT_FMT_FULL,
+	CMIT_FMT_FULLER,
+	CMIT_FMT_ONELINE,
+	CMIT_FMT_EMAIL,
+
+	CMIT_FMT_UNSPECIFIED,
+};
+
+
+
+struct commit *lookup_commit(const unsigned char *sha1);
+struct commit *lookup_commit_reference(const unsigned char *sha1);
+struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
+					      int quiet);
+
+typedef void (*topo_sort_set_fn_t)(struct commit*, void *data);
+typedef void* (*topo_sort_get_fn_t)(struct commit*);
+
+
+
+
+/*
+ *  from git:diff.h
+ */
+
+
+struct rev_info;
+struct diff_options;
+struct diff_queue_struct;
+
+typedef void (*change_fn_t)(struct diff_options *options,
+		 unsigned old_mode, unsigned new_mode,
+		 const unsigned char *old_sha1,
+		 const unsigned char *new_sha1,
+		 const char *base, const char *path);
+
+typedef void (*add_remove_fn_t)(struct diff_options *options,
+		    int addremove, unsigned mode,
+		    const unsigned char *sha1,
+		    const char *base, const char *path);
+
+typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
+		struct diff_options *options, void *data);
+
+#define DIFF_FORMAT_RAW		0x0001
+#define DIFF_FORMAT_DIFFSTAT	0x0002
+#define DIFF_FORMAT_NUMSTAT	0x0004
+#define DIFF_FORMAT_SUMMARY	0x0008
+#define DIFF_FORMAT_PATCH	0x0010
+
+/* These override all above */
+#define DIFF_FORMAT_NAME	0x0100
+#define DIFF_FORMAT_NAME_STATUS	0x0200
+#define DIFF_FORMAT_CHECKDIFF	0x0400
+
+/* Same as output_format = 0 but we know that -s flag was given
+ * and we should not give default value to output_format.
+ */
+#define DIFF_FORMAT_NO_OUTPUT	0x0800
+
+#define DIFF_FORMAT_CALLBACK	0x1000
+
+struct diff_options {
+	const char *filter;
+	const char *orderfile;
+	const char *pickaxe;
+	const char *single_follow;
+	unsigned recursive:1,
+		 tree_in_recursive:1,
+		 binary:1,
+		 text:1,
+		 full_index:1,
+		 silent_on_remove:1,
+		 find_copies_harder:1,
+		 color_diff:1,
+		 color_diff_words:1;
+	int context;
+	int break_opt;
+	int detect_rename;
+	int line_termination;
+	int output_format;
+	int pickaxe_opts;
+	int rename_score;
+	int reverse_diff;
+	int rename_limit;
+	int setup;
+	int abbrev;
+	const char *msg_sep;
+	const char *stat_sep;
+	long xdl_opts;
+
+	int stat_width;
+	int stat_name_width;
+
+	int nr_paths;
+	const char **paths;
+	int *pathlens;
+	change_fn_t change;
+	add_remove_fn_t add_remove;
+	diff_format_fn_t format_callback;
+	void *format_callback_data;
+};
+
+enum color_diff {
+	DIFF_RESET = 0,
+	DIFF_PLAIN = 1,
+	DIFF_METAINFO = 2,
+	DIFF_FRAGINFO = 3,
+	DIFF_FILE_OLD = 4,
+	DIFF_FILE_NEW = 5,
+	DIFF_COMMIT = 6,
+	DIFF_WHITESPACE = 7,
+};
+
+
+
+
+
+
+
+/*
+ * from git:revision.h
+ */
+
+struct rev_info;
+struct log_info;
+
+typedef void (prune_fn_t)(struct rev_info *revs, struct commit *commit);
+
+struct rev_info {
+	/* Starting list */
+	struct commit_list *commits;
+	struct object_array pending;
+
+	/* Basic information */
+	const char *prefix;
+	void *prune_data;
+	prune_fn_t *prune_fn;
+
+	/* Traversal flags */
+	unsigned int	dense:1,
+			no_merges:1,
+			no_walk:1,
+			remove_empty_trees:1,
+			simplify_history:1,
+			lifo:1,
+			topo_order:1,
+			tag_objects:1,
+			tree_objects:1,
+			blob_objects:1,
+			edge_hint:1,
+			limited:1,
+			unpacked:1, /* see also ignore_packed below */
+			boundary:1,
+			parents:1;
+
+	/* Diff flags */
+	unsigned int	diff:1,
+			full_diff:1,
+			show_root_diff:1,
+			no_commit_id:1,
+			verbose_header:1,
+			ignore_merges:1,
+			combine_merges:1,
+			dense_combined_merges:1,
+			always_show_header:1;
+
+	/* Format info */
+	unsigned int	shown_one:1,
+			abbrev_commit:1,
+			relative_date:1;
+
+	const char **ignore_packed; /* pretend objects in these are unpacked */
+	int num_ignore_packed;
+
+	unsigned int	abbrev;
+	enum cmit_fmt	commit_format;
+	struct log_info *loginfo;
+	int		nr, total;
+	const char	*mime_boundary;
+	const char	*message_id;
+	const char	*ref_message_id;
+	const char	*add_signoff;
+	const char	*extra_headers;
+
+	/* Filter by commit log message */
+	struct grep_opt	*grep_filter;
+
+	/* special limits */
+	int max_count;
+	unsigned long max_age;
+	unsigned long min_age;
+
+	/* diff info for patches and for paths limiting */
+	struct diff_options diffopt;
+	struct diff_options pruning;
+
+	topo_sort_set_fn_t topo_setter;
+	topo_sort_get_fn_t topo_getter;
+};
+
+
+extern struct commit *get_revision(struct rev_info *revs);
+
+
+
+
+#endif /* GIT_H */