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freebsd-dev/gnu/usr.bin/patch/pch.c
Garance A Drosehn d77254e807 Change parts of the source code to make it closer to style(9), mainly 
changing indentation and some comments.  Main goal is not perfect style,
but just to reduce differences with NetBSD.  The object code is exactly
the same after this change as before it (except for assert() statements
which have moved).

Reviewed by:	/sbin/md5 on i386
Obtained from:	NetBSD
2002-05-21 00:44:18 +00:00

1405 lines
33 KiB
C
Raw Blame History

/* $FreeBSD$
*
* $Log: pch.c,v $
* Revision 2.0.2.0 90/05/01 22:17:51 davison
* patch12u: unidiff support added
*
* Revision 2.0.1.7 88/06/03 15:13:28 lwall
* patch10: Can now find patches in shar scripts.
* patch10: Hunks that swapped and then swapped back could core dump.
*
* Revision 2.0.1.6 87/06/04 16:18:13 lwall
* pch_swap didn't swap p_bfake and p_efake.
*
* Revision 2.0.1.5 87/01/30 22:47:42 lwall
* Improved responses to mangled patches.
*
* Revision 2.0.1.4 87/01/05 16:59:53 lwall
* New-style context diffs caused double call to free().
*
* Revision 2.0.1.3 86/11/14 10:08:33 lwall
* Fixed problem where a long pattern wouldn't grow the hunk.
* Also restored p_input_line when backtracking so error messages are right.
*
* Revision 2.0.1.2 86/11/03 17:49:52 lwall
* New-style delete triggers spurious assertion error.
*
* Revision 2.0.1.1 86/10/29 15:52:08 lwall
* Could falsely report new-style context diff.
*
* Revision 2.0 86/09/17 15:39:37 lwall
* Baseline for netwide release.
*
*/
#include "EXTERN.h"
#include "common.h"
#include "util.h"
#include "INTERN.h"
#include "pch.h"
/* Patch (diff listing) abstract type. */
static long p_filesize; /* size of the patch file */
static LINENUM p_first; /* 1st line number */
static LINENUM p_newfirst; /* 1st line number of replacement */
static LINENUM p_ptrn_lines; /* # lines in pattern */
static LINENUM p_repl_lines; /* # lines in replacement text */
static LINENUM p_end = -1; /* last line in hunk */
static LINENUM p_max; /* max allowed value of p_end */
static LINENUM p_context = 3; /* # of context lines */
static LINENUM p_input_line = 0; /* current line # from patch file */
static char **p_line = Null(char**); /* the text of the hunk */
static short *p_len = Null(short*); /* length of each line */
static char *p_Char = Nullch; /* +, -, and ! */
static int hunkmax = INITHUNKMAX; /* size of above arrays to begin with */
static int p_indent; /* indent to patch */
static LINENUM p_base; /* where to intuit this time */
static LINENUM p_bline; /* line # of p_base */
static LINENUM p_start; /* where intuit found a patch */
static LINENUM p_sline; /* and the line number for it */
static LINENUM p_hunk_beg; /* line number of current hunk */
static LINENUM p_efake = -1; /* end of faked up lines--don't free */
static LINENUM p_bfake = -1; /* beg of faked up lines */
/*
* Prepare to look for the next patch in the patch file.
*/
void
re_patch(void)
{
p_first = Nulline;
p_newfirst = Nulline;
p_ptrn_lines = Nulline;
p_repl_lines = Nulline;
p_end = (LINENUM)-1;
p_max = Nulline;
p_indent = 0;
}
/*
* Open the patch file at the beginning of time.
*/
void
open_patch_file(char *filename)
{
if (filename == Nullch || !*filename || strEQ(filename, "-")) {
pfp = fopen(TMPPATNAME, "w");
if (pfp == Nullfp)
pfatal2("can't create %s", TMPPATNAME);
while (fgets(buf, sizeof buf, stdin) != Nullch)
fputs(buf, pfp);
Fclose(pfp);
filename = TMPPATNAME;
}
pfp = fopen(filename, "r");
if (pfp == Nullfp)
pfatal2("patch file %s not found", filename);
Fstat(fileno(pfp), &filestat);
p_filesize = filestat.st_size;
next_intuit_at(0L,1L); /* start at the beginning */
set_hunkmax();
}
/*
* Make sure our dynamically realloced tables are malloced to begin with.
*/
void
set_hunkmax(void)
{
#ifndef lint
if (p_line == Null(char**))
p_line = (char**) malloc((MEM)hunkmax * sizeof(char *));
if (p_len == Null(short*))
p_len = (short*) malloc((MEM)hunkmax * sizeof(short));
#endif
if (p_Char == Nullch)
p_Char = (char*) malloc((MEM)hunkmax * sizeof(char));
}
/*
* Enlarge the arrays containing the current hunk of patch.
*/
void
grow_hunkmax(void)
{
hunkmax *= 2;
/*
* Note that on most systems, only the p_line array ever gets
* fresh memory since p_len can move into p_line's old space,
* and p_Char can move into p_len's old space. Not on PDP-11's
* however. But it doesn't matter.
*/
assert(p_line != Null(char**) && p_len != Null(short*) &&
p_Char != Nullch);
#ifndef lint
p_line = (char**) realloc((char*)p_line, (MEM)hunkmax * sizeof(char *));
p_len = (short*) realloc((char*)p_len, (MEM)hunkmax * sizeof(short));
p_Char = (char*) realloc((char*)p_Char, (MEM)hunkmax * sizeof(char));
#endif
if (p_line != Null(char**) && p_len != Null(short*) && p_Char != Nullch)
return;
if (!using_plan_a)
fatal1("out of memory\n");
out_of_mem = TRUE; /* whatever is null will be allocated again */
/* from within plan_a(), of all places */
}
/*
* True if the remainder of the patch file contains a diff of some sort.
*/
bool
there_is_another_patch(void)
{
if (p_base != 0L && p_base >= p_filesize) {
if (verbose)
say1("done\n");
return FALSE;
}
if (verbose)
say1("Hmm...");
diff_type = intuit_diff_type();
if (!diff_type) {
if (p_base != 0L) {
if (verbose)
say1(" Ignoring the trailing garbage.\ndone\n");
}
else
say1(" I can't seem to find a patch in there anywhere.\n");
return FALSE;
}
if (verbose)
say3(" %sooks like %s to me...\n",
(p_base == 0L ? "L" : "The next patch l"),
diff_type == UNI_DIFF ? "a unified diff" :
diff_type == CONTEXT_DIFF ? "a context diff" :
diff_type == NEW_CONTEXT_DIFF ?
"a new-style context diff" :
diff_type == NORMAL_DIFF ? "a normal diff" :
"an ed script" );
if (p_indent && verbose)
say3("(Patch is indented %d space%s.)\n",
p_indent, p_indent==1?"":"s");
skip_to(p_start,p_sline);
while (filearg[0] == Nullch) {
if (force || batch || skip_rest_of_patch) {
say1("No file to patch. Skipping...\n");
filearg[0] = savestr(bestguess);
skip_rest_of_patch = TRUE;
return TRUE;
}
(void) ask1("File to patch: ");
if (*buf != '\n') {
if (bestguess)
free(bestguess);
bestguess = savestr(buf);
filearg[0] = fetchname(buf, 0, FALSE);
}
if (filearg[0] == Nullch) {
if (ask1("No file found--skip this patch? [n] ")) {
if (*buf != 'y') {
continue;
}
}
if (verbose)
say1("Skipping patch...\n");
filearg[0] = fetchname(bestguess, 0, TRUE);
skip_rest_of_patch = TRUE;
return TRUE;
}
}
return TRUE;
}
/*
* Determine what kind of diff is in the remaining part of the patch file.
*/
int
intuit_diff_type(void)
{
Reg4 long this_line = 0;
Reg5 long previous_line;
Reg6 long first_command_line = -1;
long fcl_line;
Reg7 bool last_line_was_command = FALSE;
Reg8 bool this_is_a_command = FALSE;
Reg9 bool stars_last_line = FALSE;
Reg10 bool stars_this_line = FALSE;
Reg3 int indent;
Reg1 char *s;
Reg2 char *t;
char *indtmp = Nullch;
char *oldtmp = Nullch;
char *newtmp = Nullch;
char *indname = Nullch;
char *oldname = Nullch;
char *newname = Nullch;
Reg11 int retval;
bool no_filearg = (filearg[0] == Nullch);
extern int index_first;
ok_to_create_file = FALSE;
Fseek(pfp, p_base, 0);
p_input_line = p_bline - 1;
for (;;) {
previous_line = this_line;
last_line_was_command = this_is_a_command;
stars_last_line = stars_this_line;
this_line = ftell(pfp);
indent = 0;
p_input_line++;
if (fgets(buf, sizeof buf, pfp) == Nullch) {
if (first_command_line >= 0L) {
/* nothing but deletes!? */
p_start = first_command_line;
p_sline = fcl_line;
retval = ED_DIFF;
goto scan_exit;
}
else {
p_start = this_line;
p_sline = p_input_line;
retval = 0;
goto scan_exit;
}
}
for (s = buf; *s == ' ' || *s == '\t' || *s == 'X'; s++) {
if (*s == '\t')
indent += 8 - (indent % 8);
else
indent++;
}
for (t=s; isdigit((unsigned char)*t) || *t == ','; t++)
;
this_is_a_command = (isdigit((unsigned char)*s) &&
(*t == 'd' || *t == 'c' || *t == 'a') );
if (first_command_line < 0L && this_is_a_command) {
first_command_line = this_line;
fcl_line = p_input_line;
p_indent = indent; /* assume this for now */
}
if (!stars_last_line && strnEQ(s, "*** ", 4))
oldtmp = savestr(s+4);
else if (strnEQ(s, "--- ", 4))
newtmp = savestr(s+4);
else if (strnEQ(s, "+++ ", 4))
oldtmp = savestr(s+4); /* pretend it is the old name */
else if (strnEQ(s, "Index:", 6))
indtmp = savestr(s+6);
else if (strnEQ(s, "Prereq:", 7)) {
for (t = s + 7; isspace((unsigned char)*t); t++)
;
revision = savestr(t);
for (t = revision; *t && !isspace((unsigned char)*t);
t++)
;
*t = '\0';
if (!*revision) {
free(revision);
revision = Nullch;
}
}
if ((!diff_type || diff_type == ED_DIFF) &&
first_command_line >= 0L &&
strEQ(s, ".\n") ) {
p_indent = indent;
p_start = first_command_line;
p_sline = fcl_line;
retval = ED_DIFF;
goto scan_exit;
}
if ((!diff_type || diff_type == UNI_DIFF) &&
strnEQ(s, "@@ -", 4)) {
if (!atol(s+3))
ok_to_create_file = TRUE;
p_indent = indent;
p_start = this_line;
p_sline = p_input_line;
retval = UNI_DIFF;
goto scan_exit;
}
stars_this_line = strnEQ(s, "********", 8);
if ((!diff_type || diff_type == CONTEXT_DIFF) &&
stars_last_line &&
strnEQ(s, "*** ", 4)) {
if (!atol(s+4))
ok_to_create_file = TRUE;
/*
* If this is a new context diff the character just
* before the newline is a '*'.
*/
while (*s != '\n')
s++;
p_indent = indent;
p_start = previous_line;
p_sline = p_input_line - 1;
retval = (*(s-1) == '*' ?
NEW_CONTEXT_DIFF : CONTEXT_DIFF);
goto scan_exit;
}
if ((!diff_type || diff_type == NORMAL_DIFF) &&
last_line_was_command &&
(strnEQ(s, "< ", 2) || strnEQ(s, "> ", 2)) ) {
p_start = previous_line;
p_sline = p_input_line - 1;
p_indent = indent;
retval = NORMAL_DIFF;
goto scan_exit;
}
}
scan_exit:
if (no_filearg) {
if (indtmp != Nullch)
indname = fetchname(indtmp, strippath,
ok_to_create_file);
if (oldtmp != Nullch)
oldname = fetchname(oldtmp, strippath,
ok_to_create_file);
if (newtmp != Nullch)
newname = fetchname(newtmp, strippath,
ok_to_create_file);
if (index_first && indname)
filearg[0] = savestr(indname);
else if (oldname && newname) {
if (strlen(oldname) < strlen(newname))
filearg[0] = savestr(oldname);
else
filearg[0] = savestr(newname);
} else if (indname)
filearg[0] = savestr(indname);
else if (oldname)
filearg[0] = savestr(oldname);
else if (newname)
filearg[0] = savestr(newname);
}
if (bestguess) {
free(bestguess);
bestguess = Nullch;
}
if (filearg[0] != Nullch)
bestguess = savestr(filearg[0]);
else if (indtmp != Nullch)
bestguess = fetchname(indtmp, strippath, TRUE);
else {
if (oldtmp != Nullch)
oldname = fetchname(oldtmp, strippath, TRUE);
if (newtmp != Nullch)
newname = fetchname(newtmp, strippath, TRUE);
if (oldname && newname) {
if (strlen(oldname) < strlen(newname))
bestguess = savestr(oldname);
else
bestguess = savestr(newname);
}
else if (oldname)
bestguess = savestr(oldname);
else if (newname)
bestguess = savestr(newname);
}
if (indtmp != Nullch)
free(indtmp);
if (oldtmp != Nullch)
free(oldtmp);
if (newtmp != Nullch)
free(newtmp);
if (indname != Nullch)
free(indname);
if (oldname != Nullch)
free(oldname);
if (newname != Nullch)
free(newname);
return retval;
}
/*
* Remember where this patch ends so we know where to start up again.
*/
void
next_intuit_at(long file_pos, long file_line)
{
p_base = file_pos;
p_bline = file_line;
}
/*
* Basically a verbose fseek() to the actual diff listing.
*/
void
skip_to(long file_pos, long file_line)
{
char *ret;
assert(p_base <= file_pos);
if (verbose && p_base < file_pos) {
Fseek(pfp, p_base, 0);
say1("The text leading up to this was:\n--------------------------\n");
while (ftell(pfp) < file_pos) {
ret = fgets(buf, sizeof buf, pfp);
assert(ret != Nullch);
say2("|%s", buf);
}
say1("--------------------------\n");
}
else
Fseek(pfp, file_pos, 0);
p_input_line = file_line - 1;
}
/*
* Make this a function for better debugging.
*/
static void
malformed(void)
{
fatal3("malformed patch at line %ld: %s", p_input_line, buf);
/* about as informative as "Syntax error" in C */
}
/*
* True if the line has been discarded (i.e. it is a line saying
* "\ No newline at end of file".)
*/
static bool
remove_special_line(void)
{
int c;
c = fgetc(pfp);
if (c == '\\') {
do {
c = fgetc(pfp);
} while (c != EOF && c != '\n');
return TRUE;
}
if (c != EOF)
fseek(pfp, -1, SEEK_CUR);
return FALSE;
}
/*
* True if there is more of the current diff listing to process.
*/
bool
another_hunk(void)
{
Reg1 char *s;
Reg8 char *ret;
Reg2 int context = 0;
while (p_end >= 0) {
if (p_end == p_efake)
p_end = p_bfake; /* don't free twice */
else
free(p_line[p_end]);
p_end--;
}
assert(p_end == -1);
p_efake = -1;
p_max = hunkmax; /* gets reduced when --- found */
if (diff_type == CONTEXT_DIFF || diff_type == NEW_CONTEXT_DIFF) {
long line_beginning = ftell(pfp);
/* file pos of the current line */
LINENUM repl_beginning = 0; /* index of --- line */
Reg4 LINENUM fillcnt = 0; /* #lines of missing ptrn or repl */
Reg5 LINENUM fillsrc; /* index of first line to copy */
Reg6 LINENUM filldst; /* index of first missing line */
bool ptrn_spaces_eaten = FALSE; /* ptrn was slightly misformed */
Reg9 bool repl_could_be_missing = TRUE;
/* no + or ! lines in this hunk */
bool repl_missing = FALSE; /* we are now backtracking */
long repl_backtrack_position = 0;
/* file pos of first repl line */
LINENUM repl_patch_line; /* input line number for same */
Reg7 LINENUM ptrn_copiable = 0;
/* # of copiable lines in ptrn */
ret = pgets(buf, sizeof buf, pfp);
p_input_line++;
if (ret == Nullch || strnNE(buf, "********", 8)) {
next_intuit_at(line_beginning,p_input_line);
return FALSE;
}
p_context = 100;
p_hunk_beg = p_input_line + 1;
while (p_end < p_max) {
line_beginning = ftell(pfp);
ret = pgets(buf, sizeof buf, pfp);
p_input_line++;
if (ret == Nullch) {
if (p_max - p_end < 4)
Strcpy(buf, " \n"); /* assume blank lines got chopped */
else {
if (repl_beginning && repl_could_be_missing) {
repl_missing = TRUE;
goto hunk_done;
}
fatal1("unexpected end of file in patch\n");
}
}
p_end++;
assert(p_end < hunkmax);
p_Char[p_end] = *buf;
#ifdef zilog
p_line[(short)p_end] = Nullch;
#else
p_line[p_end] = Nullch;
#endif
switch (*buf) {
case '*':
if (strnEQ(buf, "********", 8)) {
if (repl_beginning && repl_could_be_missing) {
repl_missing = TRUE;
goto hunk_done;
}
else
fatal2("unexpected end of hunk at line %ld\n",
p_input_line);
}
if (p_end != 0) {
if (repl_beginning && repl_could_be_missing) {
repl_missing = TRUE;
goto hunk_done;
}
fatal3("unexpected *** at line %ld: %s", p_input_line, buf);
}
context = 0;
p_line[p_end] = savestr(buf);
if (out_of_mem) {
p_end--;
return FALSE;
}
for (s=buf; *s && !isdigit((unsigned char)*s); s++) ;
if (!*s)
malformed ();
if (strnEQ(s,"0,0",3))
strcpy(s,s+2);
p_first = (LINENUM) atol(s);
while (isdigit((unsigned char)*s)) s++;
if (*s == ',') {
for (; *s && !isdigit((unsigned char)*s); s++) ;
if (!*s)
malformed ();
p_ptrn_lines = ((LINENUM)atol(s)) - p_first + 1;
}
else if (p_first)
p_ptrn_lines = 1;
else {
p_ptrn_lines = 0;
p_first = 1;
}
p_max = p_ptrn_lines + 6; /* we need this much at least */
while (p_max >= hunkmax)
grow_hunkmax();
p_max = hunkmax;
break;
case '-':
if (buf[1] == '-') {
if (repl_beginning ||
(p_end != p_ptrn_lines + 1 + (p_Char[p_end-1] == '\n')))
{
if (p_end == 1) {
/* `old' lines were omitted - set up to fill */
/* them in from 'new' context lines. */
p_end = p_ptrn_lines + 1;
fillsrc = p_end + 1;
filldst = 1;
fillcnt = p_ptrn_lines;
}
else {
if (repl_beginning) {
if (repl_could_be_missing){
repl_missing = TRUE;
goto hunk_done;
}
fatal3(
"duplicate \"---\" at line %ld--check line numbers at line %ld\n",
p_input_line, p_hunk_beg + repl_beginning);
}
else {
fatal4(
"%s \"---\" at line %ld--check line numbers at line %ld\n",
(p_end <= p_ptrn_lines
? "Premature"
: "Overdue" ),
p_input_line, p_hunk_beg);
}
}
}
repl_beginning = p_end;
repl_backtrack_position = ftell(pfp);
repl_patch_line = p_input_line;
p_line[p_end] = savestr(buf);
if (out_of_mem) {
p_end--;
return FALSE;
}
p_Char[p_end] = '=';
for (s=buf; *s && !isdigit((unsigned char)*s); s++) ;
if (!*s)
malformed ();
p_newfirst = (LINENUM) atol(s);
while (isdigit((unsigned char)*s)) s++;
if (*s == ',') {
for (; *s && !isdigit((unsigned char)*s); s++) ;
if (!*s)
malformed ();
p_repl_lines = ((LINENUM)atol(s)) - p_newfirst + 1;
}
else if (p_newfirst)
p_repl_lines = 1;
else {
p_repl_lines = 0;
p_newfirst = 1;
}
p_max = p_repl_lines + p_end;
if (p_max > MAXHUNKSIZE)
fatal4("hunk too large (%ld lines) at line %ld: %s",
p_max, p_input_line, buf);
while (p_max >= hunkmax)
grow_hunkmax();
if (p_repl_lines != ptrn_copiable
&& (p_context != 0 || p_repl_lines != 1))
repl_could_be_missing = FALSE;
break;
}
goto change_line;
case '+': case '!':
repl_could_be_missing = FALSE;
change_line:
if (buf[1] == '\n' && canonicalize)
strcpy(buf+1," \n");
if (!isspace((unsigned char)buf[1]) && buf[1] != '>' && buf[1] != '<' &&
repl_beginning && repl_could_be_missing) {
repl_missing = TRUE;
goto hunk_done;
}
if (context >= 0) {
if (context < p_context)
p_context = context;
context = -1000;
}
p_line[p_end] = savestr(buf+2);
if (out_of_mem) {
p_end--;
return FALSE;
}
if (p_end == p_ptrn_lines)
{
if (remove_special_line()) {
int len;
len = strlen(p_line[p_end]) - 1;
(p_line[p_end])[len] = 0;
}
}
break;
case '\t': case '\n': /* assume the 2 spaces got eaten */
if (repl_beginning && repl_could_be_missing &&
(!ptrn_spaces_eaten || diff_type == NEW_CONTEXT_DIFF) ) {
repl_missing = TRUE;
goto hunk_done;
}
p_line[p_end] = savestr(buf);
if (out_of_mem) {
p_end--;
return FALSE;
}
if (p_end != p_ptrn_lines + 1) {
ptrn_spaces_eaten |= (repl_beginning != 0);
context++;
if (!repl_beginning)
ptrn_copiable++;
p_Char[p_end] = ' ';
}
break;
case ' ':
if (!isspace((unsigned char)buf[1]) &&
repl_beginning && repl_could_be_missing) {
repl_missing = TRUE;
goto hunk_done;
}
context++;
if (!repl_beginning)
ptrn_copiable++;
p_line[p_end] = savestr(buf+2);
if (out_of_mem) {
p_end--;
return FALSE;
}
break;
default:
if (repl_beginning && repl_could_be_missing) {
repl_missing = TRUE;
goto hunk_done;
}
malformed ();
}
/* set up p_len for strncmp() so we don't have to */
/* assume null termination */
if (p_line[p_end])
p_len[p_end] = strlen(p_line[p_end]);
else
p_len[p_end] = 0;
}
hunk_done:
if (p_end >=0 && !repl_beginning)
fatal2("no --- found in patch at line %ld\n", pch_hunk_beg());
if (repl_missing) {
/* reset state back to just after --- */
p_input_line = repl_patch_line;
for (p_end--; p_end > repl_beginning; p_end--)
free(p_line[p_end]);
Fseek(pfp, repl_backtrack_position, 0);
/* redundant 'new' context lines were omitted - set */
/* up to fill them in from the old file context */
if (!p_context && p_repl_lines == 1) {
p_repl_lines = 0;
p_max--;
}
fillsrc = 1;
filldst = repl_beginning+1;
fillcnt = p_repl_lines;
p_end = p_max;
}
else if (!p_context && fillcnt == 1) {
/* the first hunk was a null hunk with no context */
/* and we were expecting one line -- fix it up. */
while (filldst < p_end) {
p_line[filldst] = p_line[filldst+1];
p_Char[filldst] = p_Char[filldst+1];
p_len[filldst] = p_len[filldst+1];
filldst++;
}
#if 0
repl_beginning--; /* this doesn't need to be fixed */
#endif
p_end--;
p_first++; /* do append rather than insert */
fillcnt = 0;
p_ptrn_lines = 0;
}
if (diff_type == CONTEXT_DIFF &&
(fillcnt || (p_first > 1 && ptrn_copiable > 2*p_context)) ) {
if (verbose)
say4("%s\n%s\n%s\n",
"(Fascinating--this is really a new-style context diff but without",
"the telltale extra asterisks on the *** line that usually indicate",
"the new style...)");
diff_type = NEW_CONTEXT_DIFF;
}
/* if there were omitted context lines, fill them in now */
if (fillcnt) {
p_bfake = filldst; /* remember where not to free() */
p_efake = filldst + fillcnt - 1;
while (fillcnt-- > 0) {
while (fillsrc <= p_end && p_Char[fillsrc] != ' ')
fillsrc++;
if (fillsrc > p_end)
fatal2("replacement text or line numbers mangled in hunk at line %ld\n",
p_hunk_beg);
p_line[filldst] = p_line[fillsrc];
p_Char[filldst] = p_Char[fillsrc];
p_len[filldst] = p_len[fillsrc];
fillsrc++; filldst++;
}
while (fillsrc <= p_end && fillsrc != repl_beginning &&
p_Char[fillsrc] != ' ')
fillsrc++;
#ifdef DEBUGGING
if (debug & 64)
printf("fillsrc %ld, filldst %ld, rb %ld, e+1 %ld\n",
fillsrc,filldst,repl_beginning,p_end+1);
#endif
assert(fillsrc==p_end+1 || fillsrc==repl_beginning);
assert(filldst==p_end+1 || filldst==repl_beginning);
}
if (p_line[p_end] != NULL)
{
if (remove_special_line()) {
p_len[p_end] -= 1;
(p_line[p_end])[p_len[p_end]] = 0;
}
}
}
else if (diff_type == UNI_DIFF) {
long line_beginning = ftell(pfp);
/* file pos of the current line */
Reg4 LINENUM fillsrc; /* index of old lines */
Reg5 LINENUM filldst; /* index of new lines */
char ch;
ret = pgets(buf, sizeof buf, pfp);
p_input_line++;
if (ret == Nullch || strnNE(buf, "@@ -", 4)) {
next_intuit_at(line_beginning,p_input_line);
return FALSE;
}
s = buf+4;
if (!*s)
malformed ();
p_first = (LINENUM) atol(s);
while (isdigit((unsigned char)*s)) s++;
if (*s == ',') {
p_ptrn_lines = (LINENUM) atol(++s);
while (isdigit((unsigned char)*s)) s++;
} else
p_ptrn_lines = 1;
if (*s == ' ') s++;
if (*s != '+' || !*++s)
malformed ();
p_newfirst = (LINENUM) atol(s);
while (isdigit((unsigned char)*s)) s++;
if (*s == ',') {
p_repl_lines = (LINENUM) atol(++s);
while (isdigit((unsigned char)*s)) s++;
} else
p_repl_lines = 1;
if (*s == ' ') s++;
if (*s != '@')
malformed ();
if (!p_ptrn_lines)
p_first++; /* do append rather than insert */
p_max = p_ptrn_lines + p_repl_lines + 1;
while (p_max >= hunkmax)
grow_hunkmax();
fillsrc = 1;
filldst = fillsrc + p_ptrn_lines;
p_end = filldst + p_repl_lines;
Sprintf(buf,"*** %ld,%ld ****\n",p_first,p_first + p_ptrn_lines - 1);
p_line[0] = savestr(buf);
if (out_of_mem) {
p_end = -1;
return FALSE;
}
p_Char[0] = '*';
Sprintf(buf,"--- %ld,%ld ----\n",p_newfirst,p_newfirst+p_repl_lines-1);
p_line[filldst] = savestr(buf);
if (out_of_mem) {
p_end = 0;
return FALSE;
}
p_Char[filldst++] = '=';
p_context = 100;
context = 0;
p_hunk_beg = p_input_line + 1;
while (fillsrc <= p_ptrn_lines || filldst <= p_end) {
line_beginning = ftell(pfp);
ret = pgets(buf, sizeof buf, pfp);
p_input_line++;
if (ret == Nullch) {
if (p_max - filldst < 3)
Strcpy(buf, " \n"); /* assume blank lines got chopped */
else {
fatal1("unexpected end of file in patch\n");
}
}
if (*buf == '\t' || *buf == '\n') {
ch = ' '; /* assume the space got eaten */
s = savestr(buf);
}
else {
ch = *buf;
s = savestr(buf+1);
}
if (out_of_mem) {
while (--filldst > p_ptrn_lines)
free(p_line[filldst]);
p_end = fillsrc-1;
return FALSE;
}
switch (ch) {
case '-':
if (fillsrc > p_ptrn_lines) {
free(s);
p_end = filldst-1;
malformed ();
}
p_Char[fillsrc] = ch;
p_line[fillsrc] = s;
p_len[fillsrc++] = strlen(s);
if (fillsrc > p_ptrn_lines) {
if (remove_special_line()) {
p_len[fillsrc - 1] -= 1;
s[p_len[fillsrc - 1]] = 0;
}
}
break;
case '=':
ch = ' ';
/* FALLTHROUGH */
case ' ':
if (fillsrc > p_ptrn_lines) {
free(s);
while (--filldst > p_ptrn_lines)
free(p_line[filldst]);
p_end = fillsrc-1;
malformed ();
}
context++;
p_Char[fillsrc] = ch;
p_line[fillsrc] = s;
p_len[fillsrc++] = strlen(s);
s = savestr(s);
if (out_of_mem) {
while (--filldst > p_ptrn_lines)
free(p_line[filldst]);
p_end = fillsrc-1;
return FALSE;
}
/* FALLTHROUGH */
case '+':
if (filldst > p_end) {
free(s);
while (--filldst > p_ptrn_lines)
free(p_line[filldst]);
p_end = fillsrc-1;
malformed ();
}
p_Char[filldst] = ch;
p_line[filldst] = s;
p_len[filldst++] = strlen(s);
if (fillsrc > p_ptrn_lines) {
if (remove_special_line()) {
p_len[filldst - 1] -= 1;
s[p_len[filldst - 1]] = 0;
}
}
break;
default:
p_end = filldst;
malformed ();
}
if (ch != ' ' && context > 0) {
if (context < p_context)
p_context = context;
context = -1000;
}
}/* while */
}
else { /* normal diff--fake it up */
char hunk_type;
Reg3 int i;
LINENUM min, max;
long line_beginning = ftell(pfp);
p_context = 0;
ret = pgets(buf, sizeof buf, pfp);
p_input_line++;
if (ret == Nullch || !isdigit((unsigned char)*buf)) {
next_intuit_at(line_beginning,p_input_line);
return FALSE;
}
p_first = (LINENUM)atol(buf);
for (s=buf; isdigit((unsigned char)*s); s++) ;
if (*s == ',') {
p_ptrn_lines = (LINENUM)atol(++s) - p_first + 1;
while (isdigit((unsigned char)*s)) s++;
}
else
p_ptrn_lines = (*s != 'a');
hunk_type = *s;
if (hunk_type == 'a')
p_first++; /* do append rather than insert */
min = (LINENUM)atol(++s);
for (; isdigit((unsigned char)*s); s++) ;
if (*s == ',')
max = (LINENUM)atol(++s);
else
max = min;
if (hunk_type == 'd')
min++;
p_end = p_ptrn_lines + 1 + max - min + 1;
if (p_end > MAXHUNKSIZE)
fatal4("hunk too large (%ld lines) at line %ld: %s",
p_end, p_input_line, buf);
while (p_end >= hunkmax)
grow_hunkmax();
p_newfirst = min;
p_repl_lines = max - min + 1;
Sprintf(buf, "*** %ld,%ld\n", p_first, p_first + p_ptrn_lines - 1);
p_line[0] = savestr(buf);
if (out_of_mem) {
p_end = -1;
return FALSE;
}
p_Char[0] = '*';
for (i=1; i<=p_ptrn_lines; i++) {
ret = pgets(buf, sizeof buf, pfp);
p_input_line++;
if (ret == Nullch)
fatal2("unexpected end of file in patch at line %ld\n",
p_input_line);
if (*buf != '<')
fatal2("< expected at line %ld of patch\n", p_input_line);
p_line[i] = savestr(buf+2);
if (out_of_mem) {
p_end = i-1;
return FALSE;
}
p_len[i] = strlen(p_line[i]);
p_Char[i] = '-';
}
if (remove_special_line()) {
p_len[i-1] -= 1;
(p_line[i-1])[p_len[i-1]] = 0;
}
if (hunk_type == 'c') {
ret = pgets(buf, sizeof buf, pfp);
p_input_line++;
if (ret == Nullch)
fatal2("unexpected end of file in patch at line %ld\n",
p_input_line);
if (*buf != '-')
fatal2("--- expected at line %ld of patch\n", p_input_line);
}
Sprintf(buf, "--- %ld,%ld\n", min, max);
p_line[i] = savestr(buf);
if (out_of_mem) {
p_end = i-1;
return FALSE;
}
p_Char[i] = '=';
for (i++; i<=p_end; i++) {
ret = pgets(buf, sizeof buf, pfp);
p_input_line++;
if (ret == Nullch)
fatal2("unexpected end of file in patch at line %ld\n",
p_input_line);
if (*buf != '>')
fatal2("> expected at line %ld of patch\n", p_input_line);
p_line[i] = savestr(buf+2);
if (out_of_mem) {
p_end = i-1;
return FALSE;
}
p_len[i] = strlen(p_line[i]);
p_Char[i] = '+';
}
if (remove_special_line()) {
p_len[i-1] -= 1;
(p_line[i-1])[p_len[i-1]] = 0;
}
}
if (reverse) /* backwards patch? */
if (!pch_swap())
say1("Not enough memory to swap next hunk!\n");
#ifdef DEBUGGING
if (debug & 2) {
int i;
char special;
for (i=0; i <= p_end; i++) {
if (i == p_ptrn_lines)
special = '^';
else
special = ' ';
fprintf(stderr, "%3d %c %c %s", i, p_Char[i], special, p_line[i]);
Fflush(stderr);
}
}
#endif
if (p_end+1 < hunkmax) /* paranoia reigns supreme... */
p_Char[p_end+1] = '^'; /* add a stopper for apply_hunk */
return TRUE;
}
/*
* Input a line from the patch file, worrying about indentation.
*/
char *
pgets(char *bf, int sz, FILE *fp)
{
char *ret = fgets(bf, sz, fp);
Reg1 char *s;
Reg2 int indent = 0;
if (p_indent && ret != Nullch) {
for (s=buf;
indent < p_indent && (*s == ' ' || *s == '\t' || *s == 'X');
s++) {
if (*s == '\t')
indent += 8 - (indent % 7);
else
indent++;
}
if (buf != s)
Strcpy(buf, s);
}
return ret;
}
/*
* Reverse the old and new portions of the current hunk.
*/
bool
pch_swap(void)
{
char **tp_line; /* the text of the hunk */
short *tp_len; /* length of each line */
char *tp_char; /* +, -, and ! */
Reg1 LINENUM i;
Reg2 LINENUM n;
bool blankline = FALSE;
Reg3 char *s;
i = p_first;
p_first = p_newfirst;
p_newfirst = i;
/* make a scratch copy */
tp_line = p_line;
tp_len = p_len;
tp_char = p_Char;
p_line = Null(char**); /* force set_hunkmax to allocate again */
p_len = Null(short*);
p_Char = Nullch;
set_hunkmax();
if (p_line == Null(char**) || p_len == Null(short*) || p_Char == Nullch) {
#ifndef lint
if (p_line == Null(char**))
free((char*)p_line);
p_line = tp_line;
if (p_len == Null(short*))
free((char*)p_len);
p_len = tp_len;
#endif
if (p_Char == Nullch)
free((char*)p_Char);
p_Char = tp_char;
return FALSE; /* not enough memory to swap hunk! */
}
/* now turn the new into the old */
i = p_ptrn_lines + 1;
if (tp_char[i] == '\n') { /* account for possible blank line */
blankline = TRUE;
i++;
}
if (p_efake >= 0) { /* fix non-freeable ptr range */
if (p_efake <= i)
n = p_end - i + 1;
else
n = -i;
p_efake += n;
p_bfake += n;
}
for (n=0; i <= p_end; i++,n++) {
p_line[n] = tp_line[i];
p_Char[n] = tp_char[i];
if (p_Char[n] == '+')
p_Char[n] = '-';
p_len[n] = tp_len[i];
}
if (blankline) {
i = p_ptrn_lines + 1;
p_line[n] = tp_line[i];
p_Char[n] = tp_char[i];
p_len[n] = tp_len[i];
n++;
}
assert(p_Char[0] == '=');
p_Char[0] = '*';
for (s=p_line[0]; *s; s++)
if (*s == '-')
*s = '*';
/* now turn the old into the new */
assert(tp_char[0] == '*');
tp_char[0] = '=';
for (s=tp_line[0]; *s; s++)
if (*s == '*')
*s = '-';
for (i=0; n <= p_end; i++,n++) {
p_line[n] = tp_line[i];
p_Char[n] = tp_char[i];
if (p_Char[n] == '-')
p_Char[n] = '+';
p_len[n] = tp_len[i];
}
assert(i == p_ptrn_lines + 1);
i = p_ptrn_lines;
p_ptrn_lines = p_repl_lines;
p_repl_lines = i;
#ifndef lint
if (tp_line == Null(char**))
free((char*)tp_line);
if (tp_len == Null(short*))
free((char*)tp_len);
#endif
if (tp_char == Nullch)
free((char*)tp_char);
return TRUE;
}
/*
* Return the specified line position in the old file of the old context.
*/
LINENUM
pch_first(void)
{
return p_first;
}
/*
* Return the number of lines of old context.
*/
LINENUM
pch_ptrn_lines(void)
{
return p_ptrn_lines;
}
/*
* Return the probable line position in the new file of the first line.
*/
LINENUM
pch_newfirst(void)
{
return p_newfirst;
}
/*
* Return the number of lines in the replacement text including context.
*/
LINENUM
pch_repl_lines(void)
{
return p_repl_lines;
}
/*
* Return the number of lines in the whole hunk.
*/
LINENUM
pch_end(void)
{
return p_end;
}
/*
* Return the number of context lines before the first changed line.
*/
LINENUM
pch_context(void)
{
return p_context;
}
/*
* Return the length of a particular patch line.
*/
short
pch_line_len(LINENUM line)
{
return p_len[line];
}
/*
* Return the control character (+, -, *, !, etc) for a patch line.
*/
char
pch_char(LINENUM line)
{
return p_Char[line];
}
/*
* Return a pointer to a particular patch line.
*/
char *
pfetch(LINENUM line)
{
return p_line[line];
}
/*
* Return where in the patch file this hunk began, for error messages.
*/
LINENUM
pch_hunk_beg(void)
{
return p_hunk_beg;
}
/*
* Apply an ed script by feeding ed itself.
*/
void
do_ed_script(void)
{
Reg1 char *t;
Reg2 long beginning_of_this_line;
Reg3 bool this_line_is_command = FALSE;
Reg4 FILE *pipefp;
if (!skip_rest_of_patch) {
Unlink(TMPOUTNAME);
copy_file(filearg[0], TMPOUTNAME);
if (verbose)
Sprintf(buf, "/bin/ed %s", TMPOUTNAME);
else
Sprintf(buf, "/bin/ed - %s", TMPOUTNAME);
pipefp = popen(buf, "w");
}
for (;;) {
beginning_of_this_line = ftell(pfp);
if (pgets(buf, sizeof buf, pfp) == Nullch) {
next_intuit_at(beginning_of_this_line, p_input_line);
break;
}
p_input_line++;
for (t=buf; isdigit((unsigned char)*t) || *t == ','; t++)
;
this_line_is_command = (isdigit((unsigned char)*buf) &&
(*t == 'd' || *t == 'c' || *t == 'a') );
if (this_line_is_command) {
if (!skip_rest_of_patch)
fputs(buf, pipefp);
if (*t != 'd') {
while (pgets(buf, sizeof buf, pfp) != Nullch) {
p_input_line++;
if (!skip_rest_of_patch)
fputs(buf, pipefp);
if (strEQ(buf, ".\n"))
break;
}
}
}
else {
next_intuit_at(beginning_of_this_line,p_input_line);
break;
}
}
if (skip_rest_of_patch)
return;
fprintf(pipefp, "w\n");
fprintf(pipefp, "q\n");
Fflush(pipefp);
Pclose(pipefp);
ignore_signals();
if (move_file(TMPOUTNAME, outname) < 0) {
toutkeep = TRUE;
chmod(TMPOUTNAME, filemode);
}
else
chmod(outname, filemode);
set_signals(1);
}
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