-/* $Id: mdoc_macro.c,v 1.173 2015/02/04 18:03:47 schwarze Exp $ */
+/* $Id: mdoc_macro.c,v 1.185 2015/04/02 22:48:17 schwarze Exp $ */
/*
* Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2010, 2012-2015 Ingo Schwarze <schwarze@openbsd.org>
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
#include <string.h>
#include <time.h>
-#include "mdoc.h"
#include "mandoc.h"
-#include "libmdoc.h"
+#include "roff.h"
+#include "mdoc.h"
#include "libmandoc.h"
+#include "libmdoc.h"
static void blk_full(MACRO_PROT_ARGS);
static void blk_exp_close(MACRO_PROT_ARGS);
static void dword(struct mdoc *, int, int, const char *,
enum mdelim, int);
static void append_delims(struct mdoc *, int, int *, char *);
-static enum mdoct lookup(struct mdoc *, enum mdoct,
- int, int, const char *);
+static int lookup(struct mdoc *, int, int, int, const char *);
static int macro_or_word(MACRO_PROT_ARGS, int);
-static void make_pending(struct mdoc *, struct mdoc_node *,
- struct mdoc_node *, int, int);
-static int parse_rest(struct mdoc *, enum mdoct,
- int, int *, char *);
-static enum mdoct rew_alt(enum mdoct);
-static void rew_elem(struct mdoc *, enum mdoct);
-static void rew_last(struct mdoc *, const struct mdoc_node *);
-static void rew_pending(struct mdoc *, const struct mdoc_node *);
+static int parse_rest(struct mdoc *, int, int, int *, char *);
+static int rew_alt(int);
+static void rew_elem(struct mdoc *, int);
+static void rew_last(struct mdoc *, const struct roff_node *);
+static void rew_pending(struct mdoc *, const struct roff_node *);
const struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ap */
void
mdoc_macroend(struct mdoc *mdoc)
{
- struct mdoc_node *n;
+ struct roff_node *n;
/* Scan for open explicit scopes. */
mdoc->last->parent : mdoc->last;
for ( ; n; n = n->parent)
- if (n->type == MDOC_BLOCK &&
+ if (n->type == ROFFT_BLOCK &&
mdoc_macros[n->tok].flags & MDOC_EXPLICIT)
mandoc_msg(MANDOCERR_BLK_NOEND, mdoc->parse,
n->line, n->pos, mdoc_macronames[n->tok]);
* Look up the macro at *p called by "from",
* or as a line macro if from == MDOC_MAX.
*/
-static enum mdoct
-lookup(struct mdoc *mdoc, enum mdoct from, int line, int ppos, const char *p)
+static int
+lookup(struct mdoc *mdoc, int from, int line, int ppos, const char *p)
{
- enum mdoct res;
+ int res;
if (from == MDOC_MAX || mdoc_macros[from].flags & MDOC_PARSED) {
res = mdoc_hash_find(p);
* Rewind up to and including a specific node.
*/
static void
-rew_last(struct mdoc *mdoc, const struct mdoc_node *to)
+rew_last(struct mdoc *mdoc, const struct roff_node *to)
{
- struct mdoc_node *n, *np;
+ struct roff_node *n, *np;
assert(to);
mdoc->next = MDOC_NEXT_SIBLING;
while (mdoc->last != to) {
- if ( ! (mdoc->last->flags & MDOC_VALID))
- mdoc->last->lastline = to->lastline -
- (mdoc->flags & MDOC_NEWLINE ? 1 : 0);
/*
* Save the parent here, because we may delete the
* mdoc->last node in the post-validation phase and reset
* Rewind up to a specific block, including all blocks that broke it.
*/
static void
-rew_pending(struct mdoc *mdoc, const struct mdoc_node *n)
+rew_pending(struct mdoc *mdoc, const struct roff_node *n)
{
- rew_last(mdoc, n);
-
- if (n->type != MDOC_BLOCK)
- return;
-
- while ((n = n->pending) != NULL) {
+ for (;;) {
rew_last(mdoc, n);
- if (n->type == MDOC_HEAD)
+
+ switch (n->type) {
+ case ROFFT_HEAD:
mdoc_body_alloc(mdoc, n->line, n->pos, n->tok);
+ return;
+ case ROFFT_BLOCK:
+ break;
+ default:
+ return;
+ }
+
+ if ( ! (n->flags & MDOC_BROKEN))
+ return;
+
+ for (;;) {
+ if ((n = n->parent) == NULL)
+ return;
+
+ if (n->type == ROFFT_BLOCK ||
+ n->type == ROFFT_HEAD) {
+ if (n->flags & MDOC_ENDED)
+ break;
+ else
+ return;
+ }
+ }
}
}
* For a block closing macro, return the corresponding opening one.
* Otherwise, return the macro itself.
*/
-static enum mdoct
-rew_alt(enum mdoct tok)
+static int
+rew_alt(int tok)
{
switch (tok) {
case MDOC_Ac:
}
static void
-rew_elem(struct mdoc *mdoc, enum mdoct tok)
+rew_elem(struct mdoc *mdoc, int tok)
{
- struct mdoc_node *n;
+ struct roff_node *n;
n = mdoc->last;
- if (MDOC_ELEM != n->type)
+ if (n->type != ROFFT_ELEM)
n = n->parent;
- assert(MDOC_ELEM == n->type);
+ assert(n->type == ROFFT_ELEM);
assert(tok == n->tok);
rew_last(mdoc, n);
}
-/*
- * We are trying to close the block *breaker,
- * but the child block *broken is still open.
- * Thus, postpone closing the *breaker
- * until the rew_pending() call closing *broken.
- */
-static void
-make_pending(struct mdoc *mdoc, struct mdoc_node *breaker,
- struct mdoc_node *broken, int line, int ppos)
-{
- struct mdoc_node *n;
-
- mandoc_vmsg(MANDOCERR_BLK_NEST, mdoc->parse, line, ppos,
- "%s breaks %s", mdoc_macronames[breaker->tok],
- mdoc_macronames[broken->tok]);
-
- /*
- * If the *broken block (Z) is already broken by a block (B)
- * contained in the breaker (A), make the breaker pending
- * on that inner breaker (B). Graphically,
- *
- * breaker=[A! broken=n=[B!->A (old broken=)[Z->B B] A] Z]
- *
- * In these graphics, "->" indicates the "pending" pointer and
- * "!" indicates the MDOC_BREAK flag. Each of the cases gets
- * one additional pointer (B->A) and one additional flag (A!).
- */
-
- for (n = broken->parent; ; n = n->parent)
- if (n == broken->pending)
- broken = n;
- else if (n == breaker)
- break;
-
- /*
- * Found the breaker.
- *
- * If another, outer breaker (X) is already pending on
- * the *broken block (B), we must not clobber the link
- * to the outer breaker, but make it pending on the new,
- * now inner breaker (A). Graphically,
- *
- * [X! n=breaker=[A!->X broken=[B(->X)->A X] A] B].
- */
-
- if (broken->pending != NULL) {
- n = breaker;
-
- /*
- * If the inner breaker (A) is already broken, too,
- * it cannot take on the outer breaker (X) but must
- * hand it on to its own breakers (Y). Graphically,
- *
- * [X! n=[Y!->X breaker=[A!->Y Y] broken=[B(->X)->A X] A] B]
- */
-
- while (n->pending)
- n = n->pending;
- n->pending = broken->pending;
- }
-
- /*
- * Now we have reduced the situation to the simplest case:
- * breaker=[A! broken=[B->A A] B].
- */
-
- broken->pending = breaker;
- breaker->flags |= MDOC_BREAK;
- if (breaker->body != NULL)
- breaker->body->flags |= MDOC_BREAK;
-}
-
/*
* Allocate a word and check whether it's punctuation or not.
* Punctuation consists of those tokens found in mdoc_isdelim().
if (may_append &&
! (mdoc->flags & (MDOC_SYNOPSIS | MDOC_KEEP | MDOC_SMOFF)) &&
- d == DELIM_NONE && mdoc->last->type == MDOC_TEXT &&
+ d == DELIM_NONE && mdoc->last->type == ROFFT_TEXT &&
mdoc_isdelim(mdoc->last->string) == DELIM_NONE) {
mdoc_word_append(mdoc, p);
return;
macro_or_word(MACRO_PROT_ARGS, int parsed)
{
char *p;
- enum mdoct ntok;
+ int ntok;
p = buf + ppos;
ntok = MDOC_MAX;
static void
blk_exp_close(MACRO_PROT_ARGS)
{
- struct mdoc_node *body; /* Our own body. */
- struct mdoc_node *endbody; /* Our own end marker. */
- struct mdoc_node *itblk; /* An It block starting later. */
- struct mdoc_node *later; /* A sub-block starting later. */
- struct mdoc_node *n; /* Search back to our block. */
+ struct roff_node *body; /* Our own body. */
+ struct roff_node *endbody; /* Our own end marker. */
+ struct roff_node *itblk; /* An It block starting later. */
+ struct roff_node *later; /* A sub-block starting later. */
+ struct roff_node *n; /* Search back to our block. */
int j, lastarg, maxargs, nl;
enum margserr ac;
- enum mdoct atok, ntok;
+ int atok, ntok;
char *p;
nl = MDOC_NEWLINE & mdoc->flags;
atok = rew_alt(tok);
body = endbody = itblk = later = NULL;
for (n = mdoc->last; n; n = n->parent) {
- if (n->flags & (MDOC_VALID | MDOC_BREAK))
+ if (n->flags & MDOC_ENDED) {
+ if ( ! (n->flags & MDOC_VALID))
+ n->flags |= MDOC_BROKEN;
continue;
+ }
/* Remember the start of our own body. */
- if (n->type == MDOC_BODY && atok == n->tok) {
- if (n->end == ENDBODY_NOT) {
+ if (n->type == ROFFT_BODY && atok == n->tok) {
+ if (n->end == ENDBODY_NOT)
body = n;
- n->lastline = line;
- }
continue;
}
- if (n->type != MDOC_BLOCK || n->tok == MDOC_Nm)
+ if (n->type != ROFFT_BLOCK || n->tok == MDOC_Nm)
continue;
if (n->tok == MDOC_It) {
}
if (atok == n->tok) {
- n->lastline = line;
assert(body);
/*
* When there is a pending sub block, postpone
* closing out the current block until the
* rew_pending() closing out the sub-block.
- */
-
- make_pending(mdoc, n, later, line, ppos);
- if (tok == MDOC_El)
- itblk->flags |= MDOC_BREAK;
-
- /*
* Mark the place where the formatting - but not
* the scope - of the current block ends.
*/
+ mandoc_vmsg(MANDOCERR_BLK_NEST, mdoc->parse,
+ line, ppos, "%s breaks %s",
+ mdoc_macronames[atok],
+ mdoc_macronames[later->tok]);
+
endbody = mdoc_endbody_alloc(mdoc, line, ppos,
atok, body, ENDBODY_SPACE);
+ if (tok == MDOC_El)
+ itblk->flags |= MDOC_ENDED | MDOC_BROKEN;
+
/*
* If a block closing macro taking arguments
* breaks another block, put the arguments
break;
}
- /*
- * When finding an open sub block, remember the last
- * open explicit block, or, in case there are only
- * implicit ones, the first open implicit block.
- */
+ /* Explicit blocks close out description lines. */
+
+ if (n->tok == MDOC_Nd) {
+ rew_last(mdoc, n);
+ continue;
+ }
- if (later == NULL ||
- ! (mdoc_macros[later->tok].flags & MDOC_EXPLICIT))
+ /* Breaking an open sub block. */
+
+ n->flags |= MDOC_BROKEN;
+ if (later == NULL)
later = n;
}
in_line(MACRO_PROT_ARGS)
{
int la, scope, cnt, firstarg, mayopen, nc, nl;
- enum mdoct ntok;
+ int ntok;
enum margserr ac;
enum mdelim d;
struct mdoc_arg *arg;
*/
if (ac == ARGS_PUNCT) {
- if (cnt == 0 && nc == 0)
+ if (cnt == 0 && (nc == 0 || tok == MDOC_An))
mdoc->flags |= MDOC_NODELIMC;
break;
}
{
int la, nl, parsed;
struct mdoc_arg *arg;
- struct mdoc_node *blk; /* Our own or a broken block. */
- struct mdoc_node *head; /* Our own head. */
- struct mdoc_node *body; /* Our own body. */
- struct mdoc_node *n;
+ struct roff_node *blk; /* Our own or a broken block. */
+ struct roff_node *head; /* Our own head. */
+ struct roff_node *body; /* Our own body. */
+ struct roff_node *n;
enum margserr ac, lac;
char *p;
nl = MDOC_NEWLINE & mdoc->flags;
+ if (buf[*pos] == '\0' && (tok == MDOC_Sh || tok == MDOC_Ss)) {
+ mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
+ line, ppos, mdoc_macronames[tok]);
+ return;
+ }
+
if ( ! (mdoc_macros[tok].flags & MDOC_EXPLICIT)) {
/* Here, tok is one of Sh Ss Nm Nd It. */
blk = NULL;
for (n = mdoc->last; n != NULL; n = n->parent) {
- if (n->flags & (MDOC_VALID | MDOC_BREAK) ||
- n->type != MDOC_BLOCK)
+ if (n->flags & MDOC_ENDED) {
+ if ( ! (n->flags & MDOC_VALID))
+ n->flags |= MDOC_BROKEN;
continue;
+ }
+ if (n->type != ROFFT_BLOCK)
+ continue;
+
if (tok == MDOC_It && n->tok == MDOC_Bl) {
if (blk != NULL) {
mandoc_vmsg(MANDOCERR_BLK_BROKEN,
mdoc_macronames[tok],
mdoc_macronames[n->tok]);
rew_pending(mdoc, n);
+ n = mdoc->last;
continue;
case MDOC_It:
/* Delay in case it's astray. */
body = mdoc_body_alloc(mdoc, line, ppos, tok);
break;
}
+ if (tok == MDOC_Bd || tok == MDOC_Bk) {
+ mandoc_vmsg(MANDOCERR_ARG_EXCESS,
+ mdoc->parse, line, la, "%s ... %s",
+ mdoc_macronames[tok], buf + la);
+ break;
+ }
if (tok == MDOC_Rs) {
mandoc_vmsg(MANDOCERR_ARG_SKIP, mdoc->parse,
line, la, "Rs %s", buf + la);
/*
* Emit leading punctuation (i.e., punctuation before
- * the MDOC_HEAD) for non-phrase types.
+ * the ROFFT_HEAD) for non-phrase types.
*/
if (head == NULL &&
return;
if (head == NULL)
head = mdoc_head_alloc(mdoc, line, ppos, tok);
- if (nl && tok != MDOC_Rs)
+ if (nl && tok != MDOC_Bd && tok != MDOC_Bl && tok != MDOC_Rs)
append_delims(mdoc, line, pos, buf);
if (body != NULL)
goto out;
* sub-block.
*/
for (n = mdoc->last; n && n != head; n = n->parent) {
- if (n->type == MDOC_BLOCK &&
- mdoc_macros[n->tok].flags & MDOC_EXPLICIT &&
- ! (n->flags & MDOC_VALID)) {
- n->pending = head;
- return;
+ if (n->flags & MDOC_ENDED) {
+ if ( ! (n->flags & MDOC_VALID))
+ n->flags |= MDOC_BROKEN;
+ continue;
+ }
+ if (n->type == ROFFT_BLOCK &&
+ mdoc_macros[n->tok].flags & MDOC_EXPLICIT) {
+ n->flags = MDOC_BROKEN;
+ head->flags = MDOC_ENDED;
}
}
+ if (head->flags & MDOC_ENDED)
+ return;
/* Close out scopes to remain in a consistent state. */
int la, nl;
enum margserr ac;
char *p;
- struct mdoc_node *blk; /* saved block context */
- struct mdoc_node *body; /* saved body context */
- struct mdoc_node *n;
+ struct roff_node *blk; /* saved block context */
+ struct roff_node *body; /* saved body context */
+ struct roff_node *n;
nl = MDOC_NEWLINE & mdoc->flags;
for (n = mdoc->last; n && n != body && n != blk->parent;
n = n->parent) {
- if (n->type == MDOC_BLOCK &&
- mdoc_macros[n->tok].flags & MDOC_EXPLICIT &&
- ! (n->flags & MDOC_VALID)) {
- make_pending(mdoc, blk, n, line, ppos);
- mdoc_endbody_alloc(mdoc, line, ppos,
- tok, body, ENDBODY_NOSPACE);
- return;
+ if (n->flags & MDOC_ENDED) {
+ if ( ! (n->flags & MDOC_VALID))
+ n->flags |= MDOC_BROKEN;
+ continue;
+ }
+ if (n->type == ROFFT_BLOCK &&
+ mdoc_macros[n->tok].flags & MDOC_EXPLICIT) {
+ n->flags |= MDOC_BROKEN;
+ if ( ! (body->flags & MDOC_ENDED)) {
+ mandoc_vmsg(MANDOCERR_BLK_NEST,
+ mdoc->parse, line, ppos,
+ "%s breaks %s", mdoc_macronames[tok],
+ mdoc_macronames[n->tok]);
+ mdoc_endbody_alloc(mdoc, line, ppos,
+ tok, body, ENDBODY_NOSPACE);
+ }
}
}
assert(n == body);
+ if (body->flags & MDOC_ENDED)
+ return;
+
rew_last(mdoc, body);
if (nl)
append_delims(mdoc, line, pos, buf);
{
int la, nl;
enum margserr ac;
- struct mdoc_node *head; /* keep track of head */
+ struct roff_node *head; /* keep track of head */
char *p;
nl = MDOC_NEWLINE & mdoc->flags;
static void
in_line_argn(MACRO_PROT_ARGS)
{
- int la, flushed, j, maxargs, nl;
- enum margserr ac;
struct mdoc_arg *arg;
char *p;
- enum mdoct ntok;
+ enum margserr ac;
+ int ntok;
+ int state; /* arg#; -1: not yet open; -2: closed */
+ int la, maxargs, nl;
nl = mdoc->flags & MDOC_NEWLINE;
mdoc_argv(mdoc, line, tok, &arg, pos, buf);
+ state = -1;
p = NULL;
- flushed = j = 0;
for (;;) {
la = *pos;
ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
+
+ if (ac == ARGS_WORD && state == -1 &&
+ ! (mdoc_macros[tok].flags & MDOC_IGNDELIM) &&
+ mdoc_isdelim(p) == DELIM_OPEN) {
+ dword(mdoc, line, la, p, DELIM_OPEN, 0);
+ continue;
+ }
+
+ if (state == -1 && tok != MDOC_In &&
+ tok != MDOC_St && tok != MDOC_Xr) {
+ mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
+ state = 0;
+ }
+
if (ac == ARGS_PUNCT || ac == ARGS_EOLN) {
- if (j < 2 && tok == MDOC_Pf)
+ if (abs(state) < 2 && tok == MDOC_Pf)
mandoc_vmsg(MANDOCERR_PF_SKIP,
mdoc->parse, line, ppos, "Pf %s",
p == NULL ? "at eol" : p);
break;
}
- if ( ! (mdoc_macros[tok].flags & MDOC_IGNDELIM) &&
- ac != ARGS_QWORD && j == 0 &&
- mdoc_isdelim(p) == DELIM_OPEN) {
- dword(mdoc, line, la, p, DELIM_OPEN, 0);
- continue;
- } else if (j == 0)
- mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
-
- if (j == maxargs && ! flushed) {
+ if (state == maxargs) {
rew_elem(mdoc, tok);
- flushed = 1;
+ state = -2;
}
- ntok = (ac == ARGS_QWORD || (tok == MDOC_Pf && j == 0)) ?
+ ntok = (ac == ARGS_QWORD || (tok == MDOC_Pf && state == 0)) ?
MDOC_MAX : lookup(mdoc, tok, line, la, p);
if (ntok != MDOC_MAX) {
- if ( ! flushed)
+ if (state >= 0) {
rew_elem(mdoc, tok);
- flushed = 1;
+ state = -2;
+ }
mdoc_macro(mdoc, ntok, line, la, pos, buf);
- j++;
break;
}
- if ( ! (mdoc_macros[tok].flags & MDOC_IGNDELIM) &&
- ac != ARGS_QWORD && ! flushed &&
- mdoc_isdelim(p) != DELIM_NONE) {
+ if (ac == ARGS_QWORD ||
+ mdoc_macros[tok].flags & MDOC_IGNDELIM ||
+ mdoc_isdelim(p) == DELIM_NONE) {
+ if (state == -1) {
+ mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
+ state = 1;
+ } else if (state >= 0)
+ state++;
+ } else if (state >= 0) {
rew_elem(mdoc, tok);
- flushed = 1;
+ state = -2;
}
dword(mdoc, line, la, p, DELIM_MAX,
MDOC_JOIN & mdoc_macros[tok].flags);
- j++;
}
- if (j == 0) {
- mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
- if (ac == ARGS_PUNCT && tok == MDOC_Pf)
- append_delims(mdoc, line, pos, buf);
+ if (state == -1) {
+ mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
+ line, ppos, mdoc_macronames[tok]);
+ return;
}
- if ( ! flushed)
+
+ if (state == 0 && tok == MDOC_Pf)
+ append_delims(mdoc, line, pos, buf);
+ if (state >= 0)
rew_elem(mdoc, tok);
if (nl)
append_delims(mdoc, line, pos, buf);
static void
in_line_eoln(MACRO_PROT_ARGS)
{
- struct mdoc_node *n;
+ struct roff_node *n;
struct mdoc_arg *arg;
if ((tok == MDOC_Pp || tok == MDOC_Lp) &&
rew_last(mdoc, mdoc->last->parent);
}
+ if (buf[*pos] == '\0' &&
+ (tok == MDOC_Fd || mdoc_macronames[tok][0] == '%')) {
+ mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
+ line, ppos, mdoc_macronames[tok]);
+ return;
+ }
+
mdoc_argv(mdoc, line, tok, &arg, pos, buf);
mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
if (parse_rest(mdoc, tok, line, pos, buf))
* or until the next macro, call that macro, and return 1.
*/
static int
-parse_rest(struct mdoc *mdoc, enum mdoct tok, int line, int *pos, char *buf)
+parse_rest(struct mdoc *mdoc, int tok, int line, int *pos, char *buf)
{
int la;
static void
phrase_ta(MACRO_PROT_ARGS)
{
- struct mdoc_node *body, *n;
+ struct roff_node *body, *n;
/* Make sure we are in a column list or ignore this macro. */
body = NULL;
for (n = mdoc->last; n != NULL; n = n->parent) {
- if (n->flags & (MDOC_VALID | MDOC_BREAK))
+ if (n->flags & MDOC_ENDED)
continue;
- if (n->tok == MDOC_It && n->type == MDOC_BODY)
+ if (n->tok == MDOC_It && n->type == ROFFT_BODY)
body = n;
if (n->tok == MDOC_Bl)
break;
git.ckatri.com / mandoc.git / blobdiff