diff options
Diffstat (limited to 'xdiff/xemit.c')
| -rw-r--r-- | xdiff/xemit.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/xdiff/xemit.c b/xdiff/xemit.c index 2e5d54cfcf..ad5bfb1910 100644 --- a/xdiff/xemit.c +++ b/xdiff/xemit.c @@ -69,10 +69,43 @@ static xdchange_t *xdl_get_hunk(xdchange_t *xscr, xdemitconf_t const *xecfg) { } +static void xdl_find_func(xdfile_t *xf, long i, char *buf, long sz, long *ll) { + + /* + * Be quite stupid about this for now. Find a line in the old file + * before the start of the hunk (and context) which starts with a + * plausible character. + */ + + const char *rec; + long len; + + *ll = 0; + while (i-- > 0) { + len = xdl_get_rec(xf, i, &rec); + if (len > 0 && + (isalpha((unsigned char)*rec) || /* identifier? */ + *rec == '_' || /* also identifier? */ + *rec == '(' || /* lisp defun? */ + *rec == '#')) { /* #define? */ + if (len > sz) + len = sz; + if (len && rec[len - 1] == '\n') + len--; + memcpy(buf, rec, len); + *ll = len; + return; + } + } +} + + int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, xdemitconf_t const *xecfg) { long s1, s2, e1, e2, lctx; xdchange_t *xch, *xche; + char funcbuf[40]; + long funclen = 0; for (xch = xche = xscr; xch; xch = xche->next) { xche = xdl_get_hunk(xch, xecfg); @@ -90,7 +123,13 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, /* * Emit current hunk header. */ - if (xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2, ecb) < 0) + + if (xecfg->flags & XDL_EMIT_FUNCNAMES) { + xdl_find_func(&xe->xdf1, s1, funcbuf, + sizeof(funcbuf), &funclen); + } + if (xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2, + funcbuf, funclen, ecb) < 0) return -1; /* |