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 */