Merge branch 'esr/maint-doc-fast-import'
[git.git] / resolve-undo.c
blob72b46125b719861641a55ee8fd534e0d1f47a94f
1 #include "cache.h"
2 #include "dir.h"
3 #include "resolve-undo.h"
4 #include "string-list.h"
6 /* The only error case is to run out of memory in string-list */
7 void record_resolve_undo(struct index_state *istate, struct cache_entry *ce)
9 struct string_list_item *lost;
10 struct resolve_undo_info *ui;
11 struct string_list *resolve_undo;
12 int stage = ce_stage(ce);
14 if (!stage)
15 return;
17 if (!istate->resolve_undo) {
18 resolve_undo = xcalloc(1, sizeof(*resolve_undo));
19 resolve_undo->strdup_strings = 1;
20 istate->resolve_undo = resolve_undo;
22 resolve_undo = istate->resolve_undo;
23 lost = string_list_insert(resolve_undo, ce->name);
24 if (!lost->util)
25 lost->util = xcalloc(1, sizeof(*ui));
26 ui = lost->util;
27 hashcpy(ui->sha1[stage - 1], ce->sha1);
28 ui->mode[stage - 1] = ce->ce_mode;
31 void resolve_undo_write(struct strbuf *sb, struct string_list *resolve_undo)
33 struct string_list_item *item;
34 for_each_string_list_item(item, resolve_undo) {
35 struct resolve_undo_info *ui = item->util;
36 int i;
38 if (!ui)
39 continue;
40 strbuf_addstr(sb, item->string);
41 strbuf_addch(sb, 0);
42 for (i = 0; i < 3; i++)
43 strbuf_addf(sb, "%o%c", ui->mode[i], 0);
44 for (i = 0; i < 3; i++) {
45 if (!ui->mode[i])
46 continue;
47 strbuf_add(sb, ui->sha1[i], 20);
52 struct string_list *resolve_undo_read(const char *data, unsigned long size)
54 struct string_list *resolve_undo;
55 size_t len;
56 char *endptr;
57 int i;
59 resolve_undo = xcalloc(1, sizeof(*resolve_undo));
60 resolve_undo->strdup_strings = 1;
62 while (size) {
63 struct string_list_item *lost;
64 struct resolve_undo_info *ui;
66 len = strlen(data) + 1;
67 if (size <= len)
68 goto error;
69 lost = string_list_insert(resolve_undo, data);
70 if (!lost->util)
71 lost->util = xcalloc(1, sizeof(*ui));
72 ui = lost->util;
73 size -= len;
74 data += len;
76 for (i = 0; i < 3; i++) {
77 ui->mode[i] = strtoul(data, &endptr, 8);
78 if (!endptr || endptr == data || *endptr)
79 goto error;
80 len = (endptr + 1) - (char*)data;
81 if (size <= len)
82 goto error;
83 size -= len;
84 data += len;
87 for (i = 0; i < 3; i++) {
88 if (!ui->mode[i])
89 continue;
90 if (size < 20)
91 goto error;
92 hashcpy(ui->sha1[i], (const unsigned char *)data);
93 size -= 20;
94 data += 20;
97 return resolve_undo;
99 error:
100 string_list_clear(resolve_undo, 1);
101 error("Index records invalid resolve-undo information");
102 return NULL;
105 void resolve_undo_clear_index(struct index_state *istate)
107 struct string_list *resolve_undo = istate->resolve_undo;
108 if (!resolve_undo)
109 return;
110 string_list_clear(resolve_undo, 1);
111 free(resolve_undo);
112 istate->resolve_undo = NULL;
113 istate->cache_changed = 1;
116 int unmerge_index_entry_at(struct index_state *istate, int pos)
118 struct cache_entry *ce;
119 struct string_list_item *item;
120 struct resolve_undo_info *ru;
121 int i, err = 0;
123 if (!istate->resolve_undo)
124 return pos;
126 ce = istate->cache[pos];
127 if (ce_stage(ce)) {
128 /* already unmerged */
129 while ((pos < istate->cache_nr) &&
130 ! strcmp(istate->cache[pos]->name, ce->name))
131 pos++;
132 return pos - 1; /* return the last entry processed */
134 item = string_list_lookup(istate->resolve_undo, ce->name);
135 if (!item)
136 return pos;
137 ru = item->util;
138 if (!ru)
139 return pos;
140 remove_index_entry_at(istate, pos);
141 for (i = 0; i < 3; i++) {
142 struct cache_entry *nce;
143 if (!ru->mode[i])
144 continue;
145 nce = make_cache_entry(ru->mode[i], ru->sha1[i],
146 ce->name, i + 1, 0);
147 if (add_index_entry(istate, nce, ADD_CACHE_OK_TO_ADD)) {
148 err = 1;
149 error("cannot unmerge '%s'", ce->name);
152 if (err)
153 return pos;
154 free(ru);
155 item->util = NULL;
156 return unmerge_index_entry_at(istate, pos);
159 void unmerge_index(struct index_state *istate, const char **pathspec)
161 int i;
163 if (!istate->resolve_undo)
164 return;
166 for (i = 0; i < istate->cache_nr; i++) {
167 struct cache_entry *ce = istate->cache[i];
168 if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, NULL))
169 continue;
170 i = unmerge_index_entry_at(istate, i);