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diff.c
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diff.c
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/*
* Copyright (C) 2005 Junio C Hamano
*/
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include "cache.h"
#include "quote.h"
#include "diff.h"
#include "diffcore.h"
#include "delta.h"
#include "xdiff-interface.h"
static int use_size_cache;
static int diff_detect_rename_default;
static int diff_rename_limit_default = -1;
static int diff_use_color_default;
/* "\033[1;38;5;2xx;48;5;2xxm\0" is 23 bytes */
static char diff_colors[][24] = {
"\033[m", /* reset */
"", /* normal */
"\033[1m", /* bold */
"\033[36m", /* cyan */
"\033[31m", /* red */
"\033[32m", /* green */
"\033[33m" /* yellow */
};
static int parse_diff_color_slot(const char *var, int ofs)
{
if (!strcasecmp(var+ofs, "plain"))
return DIFF_PLAIN;
if (!strcasecmp(var+ofs, "meta"))
return DIFF_METAINFO;
if (!strcasecmp(var+ofs, "frag"))
return DIFF_FRAGINFO;
if (!strcasecmp(var+ofs, "old"))
return DIFF_FILE_OLD;
if (!strcasecmp(var+ofs, "new"))
return DIFF_FILE_NEW;
if (!strcasecmp(var+ofs, "commit"))
return DIFF_COMMIT;
die("bad config variable '%s'", var);
}
static int parse_color(const char *name, int len)
{
static const char * const color_names[] = {
"normal", "black", "red", "green", "yellow",
"blue", "magenta", "cyan", "white"
};
char *end;
int i;
for (i = 0; i < ARRAY_SIZE(color_names); i++) {
const char *str = color_names[i];
if (!strncasecmp(name, str, len) && !str[len])
return i - 1;
}
i = strtol(name, &end, 10);
if (*name && !*end && i >= -1 && i <= 255)
return i;
return -2;
}
static int parse_attr(const char *name, int len)
{
static const int attr_values[] = { 1, 2, 4, 5, 7 };
static const char * const attr_names[] = {
"bold", "dim", "ul", "blink", "reverse"
};
int i;
for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
const char *str = attr_names[i];
if (!strncasecmp(name, str, len) && !str[len])
return attr_values[i];
}
return -1;
}
static void parse_diff_color_value(const char *value, const char *var, char *dst)
{
const char *ptr = value;
int attr = -1;
int fg = -2;
int bg = -2;
if (!strcasecmp(value, "reset")) {
strcpy(dst, "\033[m");
return;
}
/* [fg [bg]] [attr] */
while (*ptr) {
const char *word = ptr;
int val, len = 0;
while (word[len] && !isspace(word[len]))
len++;
ptr = word + len;
while (*ptr && isspace(*ptr))
ptr++;
val = parse_color(word, len);
if (val >= -1) {
if (fg == -2) {
fg = val;
continue;
}
if (bg == -2) {
bg = val;
continue;
}
goto bad;
}
val = parse_attr(word, len);
if (val < 0 || attr != -1)
goto bad;
attr = val;
}
if (attr >= 0 || fg >= 0 || bg >= 0) {
int sep = 0;
*dst++ = '\033';
*dst++ = '[';
if (attr >= 0) {
*dst++ = '0' + attr;
sep++;
}
if (fg >= 0) {
if (sep++)
*dst++ = ';';
if (fg < 8) {
*dst++ = '3';
*dst++ = '0' + fg;
} else {
dst += sprintf(dst, "38;5;%d", fg);
}
}
if (bg >= 0) {
if (sep++)
*dst++ = ';';
if (bg < 8) {
*dst++ = '4';
*dst++ = '0' + bg;
} else {
dst += sprintf(dst, "48;5;%d", bg);
}
}
*dst++ = 'm';
}
*dst = 0;
return;
bad:
die("bad config value '%s' for variable '%s'", value, var);
}
/*
* These are to give UI layer defaults.
* The core-level commands such as git-diff-files should
* never be affected by the setting of diff.renames
* the user happens to have in the configuration file.
*/
int git_diff_ui_config(const char *var, const char *value)
{
if (!strcmp(var, "diff.renamelimit")) {
diff_rename_limit_default = git_config_int(var, value);
return 0;
}
if (!strcmp(var, "diff.color")) {
if (!value)
diff_use_color_default = 1; /* bool */
else if (!strcasecmp(value, "auto")) {
diff_use_color_default = 0;
if (isatty(1) || (pager_in_use && pager_use_color)) {
char *term = getenv("TERM");
if (term && strcmp(term, "dumb"))
diff_use_color_default = 1;
}
}
else if (!strcasecmp(value, "never"))
diff_use_color_default = 0;
else if (!strcasecmp(value, "always"))
diff_use_color_default = 1;
else
diff_use_color_default = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "diff.renames")) {
if (!value)
diff_detect_rename_default = DIFF_DETECT_RENAME;
else if (!strcasecmp(value, "copies") ||
!strcasecmp(value, "copy"))
diff_detect_rename_default = DIFF_DETECT_COPY;
else if (git_config_bool(var,value))
diff_detect_rename_default = DIFF_DETECT_RENAME;
return 0;
}
if (!strncmp(var, "diff.color.", 11)) {
int slot = parse_diff_color_slot(var, 11);
parse_diff_color_value(value, var, diff_colors[slot]);
return 0;
}
return git_default_config(var, value);
}
static char *quote_one(const char *str)
{
int needlen;
char *xp;
if (!str)
return NULL;
needlen = quote_c_style(str, NULL, NULL, 0);
if (!needlen)
return xstrdup(str);
xp = xmalloc(needlen + 1);
quote_c_style(str, xp, NULL, 0);
return xp;
}
static char *quote_two(const char *one, const char *two)
{
int need_one = quote_c_style(one, NULL, NULL, 1);
int need_two = quote_c_style(two, NULL, NULL, 1);
char *xp;
if (need_one + need_two) {
if (!need_one) need_one = strlen(one);
if (!need_two) need_one = strlen(two);
xp = xmalloc(need_one + need_two + 3);
xp[0] = '"';
quote_c_style(one, xp + 1, NULL, 1);
quote_c_style(two, xp + need_one + 1, NULL, 1);
strcpy(xp + need_one + need_two + 1, "\"");
return xp;
}
need_one = strlen(one);
need_two = strlen(two);
xp = xmalloc(need_one + need_two + 1);
strcpy(xp, one);
strcpy(xp + need_one, two);
return xp;
}
static const char *external_diff(void)
{
static const char *external_diff_cmd = NULL;
static int done_preparing = 0;
if (done_preparing)
return external_diff_cmd;
external_diff_cmd = getenv("GIT_EXTERNAL_DIFF");
done_preparing = 1;
return external_diff_cmd;
}
#define TEMPFILE_PATH_LEN 50
static struct diff_tempfile {
const char *name; /* filename external diff should read from */
char hex[41];
char mode[10];
char tmp_path[TEMPFILE_PATH_LEN];
} diff_temp[2];
static int count_lines(const char *data, int size)
{
int count, ch, completely_empty = 1, nl_just_seen = 0;
count = 0;
while (0 < size--) {
ch = *data++;
if (ch == '\n') {
count++;
nl_just_seen = 1;
completely_empty = 0;
}
else {
nl_just_seen = 0;
completely_empty = 0;
}
}
if (completely_empty)
return 0;
if (!nl_just_seen)
count++; /* no trailing newline */
return count;
}
static void print_line_count(int count)
{
switch (count) {
case 0:
printf("0,0");
break;
case 1:
printf("1");
break;
default:
printf("1,%d", count);
break;
}
}
static void copy_file(int prefix, const char *data, int size)
{
int ch, nl_just_seen = 1;
while (0 < size--) {
ch = *data++;
if (nl_just_seen)
putchar(prefix);
putchar(ch);
if (ch == '\n')
nl_just_seen = 1;
else
nl_just_seen = 0;
}
if (!nl_just_seen)
printf("\n\\ No newline at end of file\n");
}
static void emit_rewrite_diff(const char *name_a,
const char *name_b,
struct diff_filespec *one,
struct diff_filespec *two)
{
int lc_a, lc_b;
diff_populate_filespec(one, 0);
diff_populate_filespec(two, 0);
lc_a = count_lines(one->data, one->size);
lc_b = count_lines(two->data, two->size);
printf("--- %s\n+++ %s\n@@ -", name_a, name_b);
print_line_count(lc_a);
printf(" +");
print_line_count(lc_b);
printf(" @@\n");
if (lc_a)
copy_file('-', one->data, one->size);
if (lc_b)
copy_file('+', two->data, two->size);
}
static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one)
{
if (!DIFF_FILE_VALID(one)) {
mf->ptr = (char *)""; /* does not matter */
mf->size = 0;
return 0;
}
else if (diff_populate_filespec(one, 0))
return -1;
mf->ptr = one->data;
mf->size = one->size;
return 0;
}
struct diff_words_buffer {
mmfile_t text;
long alloc;
long current; /* output pointer */
int suppressed_newline;
};
static void diff_words_append(char *line, unsigned long len,
struct diff_words_buffer *buffer)
{
if (buffer->text.size + len > buffer->alloc) {
buffer->alloc = (buffer->text.size + len) * 3 / 2;
buffer->text.ptr = xrealloc(buffer->text.ptr, buffer->alloc);
}
line++;
len--;
memcpy(buffer->text.ptr + buffer->text.size, line, len);
buffer->text.size += len;
}
struct diff_words_data {
struct xdiff_emit_state xm;
struct diff_words_buffer minus, plus;
};
static void print_word(struct diff_words_buffer *buffer, int len, int color,
int suppress_newline)
{
const char *ptr;
int eol = 0;
if (len == 0)
return;
ptr = buffer->text.ptr + buffer->current;
buffer->current += len;
if (ptr[len - 1] == '\n') {
eol = 1;
len--;
}
fputs(diff_get_color(1, color), stdout);
fwrite(ptr, len, 1, stdout);
fputs(diff_get_color(1, DIFF_RESET), stdout);
if (eol) {
if (suppress_newline)
buffer->suppressed_newline = 1;
else
putchar('\n');
}
}
static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len)
{
struct diff_words_data *diff_words = priv;
if (diff_words->minus.suppressed_newline) {
if (line[0] != '+')
putchar('\n');
diff_words->minus.suppressed_newline = 0;
}
len--;
switch (line[0]) {
case '-':
print_word(&diff_words->minus, len, DIFF_FILE_OLD, 1);
break;
case '+':
print_word(&diff_words->plus, len, DIFF_FILE_NEW, 0);
break;
case ' ':
print_word(&diff_words->plus, len, DIFF_PLAIN, 0);
diff_words->minus.current += len;
break;
}
}
/* this executes the word diff on the accumulated buffers */
static void diff_words_show(struct diff_words_data *diff_words)
{
xpparam_t xpp;
xdemitconf_t xecfg;
xdemitcb_t ecb;
mmfile_t minus, plus;
int i;
minus.size = diff_words->minus.text.size;
minus.ptr = xmalloc(minus.size);
memcpy(minus.ptr, diff_words->minus.text.ptr, minus.size);
for (i = 0; i < minus.size; i++)
if (isspace(minus.ptr[i]))
minus.ptr[i] = '\n';
diff_words->minus.current = 0;
plus.size = diff_words->plus.text.size;
plus.ptr = xmalloc(plus.size);
memcpy(plus.ptr, diff_words->plus.text.ptr, plus.size);
for (i = 0; i < plus.size; i++)
if (isspace(plus.ptr[i]))
plus.ptr[i] = '\n';
diff_words->plus.current = 0;
xpp.flags = XDF_NEED_MINIMAL;
xecfg.ctxlen = diff_words->minus.alloc + diff_words->plus.alloc;
xecfg.flags = 0;
ecb.outf = xdiff_outf;
ecb.priv = diff_words;
diff_words->xm.consume = fn_out_diff_words_aux;
xdl_diff(&minus, &plus, &xpp, &xecfg, &ecb);
free(minus.ptr);
free(plus.ptr);
diff_words->minus.text.size = diff_words->plus.text.size = 0;
if (diff_words->minus.suppressed_newline) {
putchar('\n');
diff_words->minus.suppressed_newline = 0;
}
}
struct emit_callback {
struct xdiff_emit_state xm;
int nparents, color_diff;
const char **label_path;
struct diff_words_data *diff_words;
};
static void free_diff_words_data(struct emit_callback *ecbdata)
{
if (ecbdata->diff_words) {
/* flush buffers */
if (ecbdata->diff_words->minus.text.size ||
ecbdata->diff_words->plus.text.size)
diff_words_show(ecbdata->diff_words);
if (ecbdata->diff_words->minus.text.ptr)
free (ecbdata->diff_words->minus.text.ptr);
if (ecbdata->diff_words->plus.text.ptr)
free (ecbdata->diff_words->plus.text.ptr);
free(ecbdata->diff_words);
ecbdata->diff_words = NULL;
}
}
const char *diff_get_color(int diff_use_color, enum color_diff ix)
{
if (diff_use_color)
return diff_colors[ix];
return "";
}
static void fn_out_consume(void *priv, char *line, unsigned long len)
{
int i;
struct emit_callback *ecbdata = priv;
const char *set = diff_get_color(ecbdata->color_diff, DIFF_METAINFO);
const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET);
if (ecbdata->label_path[0]) {
printf("%s--- %s%s\n", set, ecbdata->label_path[0], reset);
printf("%s+++ %s%s\n", set, ecbdata->label_path[1], reset);
ecbdata->label_path[0] = ecbdata->label_path[1] = NULL;
}
/* This is not really necessary for now because
* this codepath only deals with two-way diffs.
*/
for (i = 0; i < len && line[i] == '@'; i++)
;
if (2 <= i && i < len && line[i] == ' ') {
ecbdata->nparents = i - 1;
set = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO);
}
else if (len < ecbdata->nparents)
set = reset;
else {
int nparents = ecbdata->nparents;
int color = DIFF_PLAIN;
if (ecbdata->diff_words && nparents != 1)
/* fall back to normal diff */
free_diff_words_data(ecbdata);
if (ecbdata->diff_words) {
if (line[0] == '-') {
diff_words_append(line, len,
&ecbdata->diff_words->minus);
return;
} else if (line[0] == '+') {
diff_words_append(line, len,
&ecbdata->diff_words->plus);
return;
}
if (ecbdata->diff_words->minus.text.size ||
ecbdata->diff_words->plus.text.size)
diff_words_show(ecbdata->diff_words);
line++;
len--;
} else
for (i = 0; i < nparents && len; i++) {
if (line[i] == '-')
color = DIFF_FILE_OLD;
else if (line[i] == '+')
color = DIFF_FILE_NEW;
}
set = diff_get_color(ecbdata->color_diff, color);
}
if (len > 0 && line[len-1] == '\n')
len--;
fputs (set, stdout);
fwrite (line, len, 1, stdout);
puts (reset);
}
static char *pprint_rename(const char *a, const char *b)
{
const char *old = a;
const char *new = b;
char *name = NULL;
int pfx_length, sfx_length;
int len_a = strlen(a);
int len_b = strlen(b);
/* Find common prefix */
pfx_length = 0;
while (*old && *new && *old == *new) {
if (*old == '/')
pfx_length = old - a + 1;
old++;
new++;
}
/* Find common suffix */
old = a + len_a;
new = b + len_b;
sfx_length = 0;
while (a <= old && b <= new && *old == *new) {
if (*old == '/')
sfx_length = len_a - (old - a);
old--;
new--;
}
/*
* pfx{mid-a => mid-b}sfx
* {pfx-a => pfx-b}sfx
* pfx{sfx-a => sfx-b}
* name-a => name-b
*/
if (pfx_length + sfx_length) {
int a_midlen = len_a - pfx_length - sfx_length;
int b_midlen = len_b - pfx_length - sfx_length;
if (a_midlen < 0) a_midlen = 0;
if (b_midlen < 0) b_midlen = 0;
name = xmalloc(pfx_length + a_midlen + b_midlen + sfx_length + 7);
sprintf(name, "%.*s{%.*s => %.*s}%s",
pfx_length, a,
a_midlen, a + pfx_length,
b_midlen, b + pfx_length,
a + len_a - sfx_length);
}
else {
name = xmalloc(len_a + len_b + 5);
sprintf(name, "%s => %s", a, b);
}
return name;
}
struct diffstat_t {
struct xdiff_emit_state xm;
int nr;
int alloc;
struct diffstat_file {
char *name;
unsigned is_unmerged:1;
unsigned is_binary:1;
unsigned is_renamed:1;
unsigned int added, deleted;
} **files;
};
static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat,
const char *name_a,
const char *name_b)
{
struct diffstat_file *x;
x = xcalloc(sizeof (*x), 1);
if (diffstat->nr == diffstat->alloc) {
diffstat->alloc = alloc_nr(diffstat->alloc);
diffstat->files = xrealloc(diffstat->files,
diffstat->alloc * sizeof(x));
}
diffstat->files[diffstat->nr++] = x;
if (name_b) {
x->name = pprint_rename(name_a, name_b);
x->is_renamed = 1;
}
else
x->name = xstrdup(name_a);
return x;
}
static void diffstat_consume(void *priv, char *line, unsigned long len)
{
struct diffstat_t *diffstat = priv;
struct diffstat_file *x = diffstat->files[diffstat->nr - 1];
if (line[0] == '+')
x->added++;
else if (line[0] == '-')
x->deleted++;
}
static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
static const char minuses[]= "----------------------------------------------------------------------";
const char mime_boundary_leader[] = "------------";
static void show_stats(struct diffstat_t* data)
{
int i, len, add, del, total, adds = 0, dels = 0;
int max, max_change = 0, max_len = 0;
int total_files = data->nr;
if (data->nr == 0)
return;
for (i = 0; i < data->nr; i++) {
struct diffstat_file *file = data->files[i];
len = strlen(file->name);
if (max_len < len)
max_len = len;
if (file->is_binary || file->is_unmerged)
continue;
if (max_change < file->added + file->deleted)
max_change = file->added + file->deleted;
}
for (i = 0; i < data->nr; i++) {
const char *prefix = "";
char *name = data->files[i]->name;
int added = data->files[i]->added;
int deleted = data->files[i]->deleted;
if (0 < (len = quote_c_style(name, NULL, NULL, 0))) {
char *qname = xmalloc(len + 1);
quote_c_style(name, qname, NULL, 0);
free(name);
data->files[i]->name = name = qname;
}
/*
* "scale" the filename
*/
len = strlen(name);
max = max_len;
if (max > 50)
max = 50;
if (len > max) {
char *slash;
prefix = "...";
max -= 3;
name += len - max;
slash = strchr(name, '/');
if (slash)
name = slash;
}
len = max;
/*
* scale the add/delete
*/
max = max_change;
if (max + len > 70)
max = 70 - len;
if (data->files[i]->is_binary) {
printf(" %s%-*s | Bin\n", prefix, len, name);
goto free_diffstat_file;
}
else if (data->files[i]->is_unmerged) {
printf(" %s%-*s | Unmerged\n", prefix, len, name);
goto free_diffstat_file;
}
else if (!data->files[i]->is_renamed &&
(added + deleted == 0)) {
total_files--;
goto free_diffstat_file;
}
add = added;
del = deleted;
total = add + del;
adds += add;
dels += del;
if (max_change > 0) {
total = (total * max + max_change / 2) / max_change;
add = (add * max + max_change / 2) / max_change;
del = total - add;
}
printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
len, name, added + deleted,
add, pluses, del, minuses);
free_diffstat_file:
free(data->files[i]->name);
free(data->files[i]);
}
free(data->files);
printf(" %d files changed, %d insertions(+), %d deletions(-)\n",
total_files, adds, dels);
}
struct checkdiff_t {
struct xdiff_emit_state xm;
const char *filename;
int lineno;
};
static void checkdiff_consume(void *priv, char *line, unsigned long len)
{
struct checkdiff_t *data = priv;
if (line[0] == '+') {
int i, spaces = 0;
data->lineno++;
/* check space before tab */
for (i = 1; i < len && (line[i] == ' ' || line[i] == '\t'); i++)
if (line[i] == ' ')
spaces++;
if (line[i - 1] == '\t' && spaces)
printf("%s:%d: space before tab:%.*s\n",
data->filename, data->lineno, (int)len, line);
/* check white space at line end */
if (line[len - 1] == '\n')
len--;
if (isspace(line[len - 1]))
printf("%s:%d: white space at end: %.*s\n",
data->filename, data->lineno, (int)len, line);
} else if (line[0] == ' ')
data->lineno++;
else if (line[0] == '@') {
char *plus = strchr(line, '+');
if (plus)
data->lineno = strtol(plus, NULL, 10);
else
die("invalid diff");
}
}
static unsigned char *deflate_it(char *data,
unsigned long size,
unsigned long *result_size)
{
int bound;
unsigned char *deflated;
z_stream stream;
memset(&stream, 0, sizeof(stream));
deflateInit(&stream, zlib_compression_level);
bound = deflateBound(&stream, size);
deflated = xmalloc(bound);
stream.next_out = deflated;
stream.avail_out = bound;
stream.next_in = (unsigned char *)data;
stream.avail_in = size;
while (deflate(&stream, Z_FINISH) == Z_OK)
; /* nothing */
deflateEnd(&stream);
*result_size = stream.total_out;
return deflated;
}
static void emit_binary_diff_body(mmfile_t *one, mmfile_t *two)
{
void *cp;
void *delta;
void *deflated;
void *data;
unsigned long orig_size;
unsigned long delta_size;
unsigned long deflate_size;
unsigned long data_size;
/* We could do deflated delta, or we could do just deflated two,
* whichever is smaller.
*/
delta = NULL;
deflated = deflate_it(two->ptr, two->size, &deflate_size);
if (one->size && two->size) {
delta = diff_delta(one->ptr, one->size,
two->ptr, two->size,
&delta_size, deflate_size);
if (delta) {
void *to_free = delta;
orig_size = delta_size;
delta = deflate_it(delta, delta_size, &delta_size);
free(to_free);
}
}
if (delta && delta_size < deflate_size) {
printf("delta %lu\n", orig_size);
free(deflated);
data = delta;
data_size = delta_size;
}
else {
printf("literal %lu\n", two->size);
free(delta);
data = deflated;
data_size = deflate_size;
}
/* emit data encoded in base85 */
cp = data;
while (data_size) {
int bytes = (52 < data_size) ? 52 : data_size;
char line[70];
data_size -= bytes;
if (bytes <= 26)
line[0] = bytes + 'A' - 1;
else
line[0] = bytes - 26 + 'a' - 1;
encode_85(line + 1, cp, bytes);
cp = (char *) cp + bytes;
puts(line);
}
printf("\n");
free(data);
}
static void emit_binary_diff(mmfile_t *one, mmfile_t *two)
{
printf("GIT binary patch\n");
emit_binary_diff_body(one, two);
emit_binary_diff_body(two, one);
}
#define FIRST_FEW_BYTES 8000
static int mmfile_is_binary(mmfile_t *mf)
{
long sz = mf->size;
if (FIRST_FEW_BYTES < sz)
sz = FIRST_FEW_BYTES;
return !!memchr(mf->ptr, 0, sz);
}
static void builtin_diff(const char *name_a,
const char *name_b,
struct diff_filespec *one,
struct diff_filespec *two,
const char *xfrm_msg,
struct diff_options *o,
int complete_rewrite)
{
mmfile_t mf1, mf2;
const char *lbl[2];
char *a_one, *b_two;
const char *set = diff_get_color(o->color_diff, DIFF_METAINFO);
const char *reset = diff_get_color(o->color_diff, DIFF_RESET);
a_one = quote_two("a/", name_a);
b_two = quote_two("b/", name_b);
lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null";
lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null";
printf("%sdiff --git %s %s%s\n", set, a_one, b_two, reset);
if (lbl[0][0] == '/') {
/* /dev/null */
printf("%snew file mode %06o%s\n", set, two->mode, reset);
if (xfrm_msg && xfrm_msg[0])
printf("%s%s%s\n", set, xfrm_msg, reset);
}
else if (lbl[1][0] == '/') {
printf("%sdeleted file mode %06o%s\n", set, one->mode, reset);
if (xfrm_msg && xfrm_msg[0])
printf("%s%s%s\n", set, xfrm_msg, reset);
}
else {
if (one->mode != two->mode) {
printf("%sold mode %06o%s\n", set, one->mode, reset);
printf("%snew mode %06o%s\n", set, two->mode, reset);
}
if (xfrm_msg && xfrm_msg[0])
printf("%s%s%s\n", set, xfrm_msg, reset);
/*
* we do not run diff between different kind
* of objects.
*/
if ((one->mode ^ two->mode) & S_IFMT)
goto free_ab_and_return;
if (complete_rewrite) {
emit_rewrite_diff(name_a, name_b, one, two);
goto free_ab_and_return;
}
}
if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
die("unable to read files to diff");
if (!o->text && (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2))) {
/* Quite common confusing case */
if (mf1.size == mf2.size &&
!memcmp(mf1.ptr, mf2.ptr, mf1.size))
goto free_ab_and_return;
if (o->binary)
emit_binary_diff(&mf1, &mf2);
else
printf("Binary files %s and %s differ\n",
lbl[0], lbl[1]);
}
else {
/* Crazy xdl interfaces.. */
const char *diffopts = getenv("GIT_DIFF_OPTS");
xpparam_t xpp;
xdemitconf_t xecfg;
xdemitcb_t ecb;
struct emit_callback ecbdata;
memset(&ecbdata, 0, sizeof(ecbdata));
ecbdata.label_path = lbl;
ecbdata.color_diff = o->color_diff;
xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts;
xecfg.ctxlen = o->context;
xecfg.flags = XDL_EMIT_FUNCNAMES;
if (!diffopts)
;
else if (!strncmp(diffopts, "--unified=", 10))
xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10);
else if (!strncmp(diffopts, "-u", 2))
xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10);
ecb.outf = xdiff_outf;
ecb.priv = &ecbdata;