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Merge branch 'jc/maint-1.6.0-blank-at-eof' (early part) into jc/maint-blank-at-eof

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* 'jc/maint-1.6.0-blank-at-eof' (early part):
  diff.c: shuffling code around
This commit is contained in:
Junio C Hamano 2009-09-15 03:38:30 -07:00
commit bb35fefbc9
1 changed files with 148 additions and 148 deletions
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296
diff.c
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@ -174,6 +174,154 @@ static struct diff_tempfile {
char tmp_path[PATH_MAX]; char tmp_path[PATH_MAX];
} diff_temp[2]; } diff_temp[2];
typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len);
struct emit_callback {
int color_diff;
unsigned ws_rule;
int blank_at_eof_in_preimage;
int blank_at_eof_in_postimage;
int lno_in_preimage;
int lno_in_postimage;
sane_truncate_fn truncate;
const char **label_path;
struct diff_words_data *diff_words;
int *found_changesp;
FILE *file;
};
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 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;
}
static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule)
{
char *ptr = mf->ptr;
long size = mf->size;
int cnt = 0;
if (!size)
return cnt;
ptr += size - 1; /* pointing at the very end */
if (*ptr != '\n')
; /* incomplete line */
else
ptr--; /* skip the last LF */
while (mf->ptr < ptr) {
char *prev_eol;
for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--)
if (*prev_eol == '\n')
break;
if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule))
break;
cnt++;
ptr = prev_eol - 1;
}
return cnt;
}
static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2,
struct emit_callback *ecbdata)
{
int l1, l2, at;
unsigned ws_rule = ecbdata->ws_rule;
l1 = count_trailing_blank(mf1, ws_rule);
l2 = count_trailing_blank(mf2, ws_rule);
if (l2 <= l1) {
ecbdata->blank_at_eof_in_preimage = 0;
ecbdata->blank_at_eof_in_postimage = 0;
return;
}
at = count_lines(mf1->ptr, mf1->size);
ecbdata->blank_at_eof_in_preimage = (at - l1) + 1;
at = count_lines(mf2->ptr, mf2->size);
ecbdata->blank_at_eof_in_postimage = (at - l2) + 1;
}
static void emit_line(FILE *file, const char *set, const char *reset, const char *line, int len)
{
int has_trailing_newline, has_trailing_carriage_return;
has_trailing_newline = (len > 0 && line[len-1] == '\n');
if (has_trailing_newline)
len--;
has_trailing_carriage_return = (len > 0 && line[len-1] == '\r');
if (has_trailing_carriage_return)
len--;
fputs(set, file);
fwrite(line, len, 1, file);
fputs(reset, file);
if (has_trailing_carriage_return)
fputc('\r', file);
if (has_trailing_newline)
fputc('\n', file);
}
static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len)
{
if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) &&
ecbdata->blank_at_eof_in_preimage &&
ecbdata->blank_at_eof_in_postimage &&
ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage &&
ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage))
return 0;
return ws_blank_line(line + 1, len - 1, ecbdata->ws_rule);
}
static void emit_add_line(const char *reset, struct emit_callback *ecbdata, const char *line, int len)
{
const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE);
const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW);
if (!*ws)
emit_line(ecbdata->file, set, reset, line, len);
else if (new_blank_line_at_eof(ecbdata, line, len))
/* Blank line at EOF - paint '+' as well */
emit_line(ecbdata->file, ws, reset, line, len);
else {
/* Emit just the prefix, then the rest. */
emit_line(ecbdata->file, set, reset, line, 1);
ws_check_emit(line + 1, len - 1, ecbdata->ws_rule,
ecbdata->file, set, reset, ws);
}
}
static struct diff_tempfile *claim_diff_tempfile(void) { static struct diff_tempfile *claim_diff_tempfile(void) {
int i; int i;
for (i = 0; i < ARRAY_SIZE(diff_temp); i++) for (i = 0; i < ARRAY_SIZE(diff_temp); i++)
@ -201,29 +349,6 @@ static void remove_tempfile_on_signal(int signo)
raise(signo); raise(signo);
} }
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(FILE *file, int count) static void print_line_count(FILE *file, int count)
{ {
switch (count) { switch (count) {
@ -337,21 +462,6 @@ static void emit_rewrite_diff(const char *name_a,
copy_file_with_prefix(o->file, '+', data_two, size_two, new, reset); copy_file_with_prefix(o->file, '+', data_two, size_two, new, reset);
} }
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 { struct diff_words_buffer {
mmfile_t text; mmfile_t text;
long alloc; long alloc;
@ -529,22 +639,6 @@ static void diff_words_show(struct diff_words_data *diff_words)
diff_words->minus.text.size = diff_words->plus.text.size = 0; diff_words->minus.text.size = diff_words->plus.text.size = 0;
} }
typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len);
struct emit_callback {
int color_diff;
unsigned ws_rule;
int blank_at_eof_in_preimage;
int blank_at_eof_in_postimage;
int lno_in_preimage;
int lno_in_postimage;
sane_truncate_fn truncate;
const char **label_path;
struct diff_words_data *diff_words;
int *found_changesp;
FILE *file;
};
static void free_diff_words_data(struct emit_callback *ecbdata) static void free_diff_words_data(struct emit_callback *ecbdata)
{ {
if (ecbdata->diff_words) { if (ecbdata->diff_words) {
@ -570,55 +664,6 @@ const char *diff_get_color(int diff_use_color, enum color_diff ix)
return ""; return "";
} }
static void emit_line(FILE *file, const char *set, const char *reset, const char *line, int len)
{
int has_trailing_newline, has_trailing_carriage_return;
has_trailing_newline = (len > 0 && line[len-1] == '\n');
if (has_trailing_newline)
len--;
has_trailing_carriage_return = (len > 0 && line[len-1] == '\r');
if (has_trailing_carriage_return)
len--;
fputs(set, file);
fwrite(line, len, 1, file);
fputs(reset, file);
if (has_trailing_carriage_return)
fputc('\r', file);
if (has_trailing_newline)
fputc('\n', file);
}
static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len)
{
if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) &&
ecbdata->blank_at_eof_in_preimage &&
ecbdata->blank_at_eof_in_postimage &&
ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage &&
ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage))
return 0;
return ws_blank_line(line + 1, len - 1, ecbdata->ws_rule);
}
static void emit_add_line(const char *reset, struct emit_callback *ecbdata, const char *line, int len)
{
const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE);
const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW);
if (!*ws)
emit_line(ecbdata->file, set, reset, line, len);
else if (new_blank_line_at_eof(ecbdata, line, len))
/* Blank line at EOF - paint '+' as well */
emit_line(ecbdata->file, ws, reset, line, len);
else {
/* Emit just the prefix, then the rest. */
emit_line(ecbdata->file, set, reset, line, 1);
ws_check_emit(line + 1, len - 1, ecbdata->ws_rule,
ecbdata->file, set, reset, ws);
}
}
static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len)
{ {
const char *cp; const char *cp;
@ -1450,51 +1495,6 @@ static const char *get_textconv(struct diff_filespec *one)
return one->driver->textconv; return one->driver->textconv;
} }
static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule)
{
char *ptr = mf->ptr;
long size = mf->size;
int cnt = 0;
if (!size)
return cnt;
ptr += size - 1; /* pointing at the very end */
if (*ptr != '\n')
; /* incomplete line */
else
ptr--; /* skip the last LF */
while (mf->ptr < ptr) {
char *prev_eol;
for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--)
if (*prev_eol == '\n')
break;
if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule))
break;
cnt++;
ptr = prev_eol - 1;
}
return cnt;
}
static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2,
struct emit_callback *ecbdata)
{
int l1, l2, at;
unsigned ws_rule = ecbdata->ws_rule;
l1 = count_trailing_blank(mf1, ws_rule);
l2 = count_trailing_blank(mf2, ws_rule);
if (l2 <= l1) {
ecbdata->blank_at_eof_in_preimage = 0;
ecbdata->blank_at_eof_in_postimage = 0;
return;
}
at = count_lines(mf1->ptr, mf1->size);
ecbdata->blank_at_eof_in_preimage = (at - l1) + 1;
at = count_lines(mf2->ptr, mf2->size);
ecbdata->blank_at_eof_in_postimage = (at - l2) + 1;
}
static void builtin_diff(const char *name_a, static void builtin_diff(const char *name_a,
const char *name_b, const char *name_b,
struct diff_filespec *one, struct diff_filespec *one,