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Change the internal buffer used to store input lines from a static buffer

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to a dynamically allocated one in order to support input lines of
arbitrary length.

Approved by:	kan (mentor)
MFC after:	1 month
This commit is contained in:
Stephane E. Potvin 2009-05-08 02:18:46 +00:00
parent b4307a77d2
commit 9ab20e104c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=191910
7 changed files with 75 additions and 54 deletions
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5
gnu/usr.bin/patch/common.h
View File

@ -63,7 +63,7 @@
#define MAXHUNKSIZE 200000 /* is this enough lines? */
#define INITHUNKMAX 125 /* initial dynamic allocation size */
#define MAXLINELEN 4096
#define INITLINELEN 4096
#define BUFFERSIZE 4096
#define SCCSPREFIX "s."
@ -105,7 +105,8 @@ EXT int optind_last; /* for restarting plan_b */
EXT struct stat filestat; /* file statistics area */
EXT int filemode INIT(0644);
EXT char buf[MAXLINELEN]; /* general purpose buffer */
EXT char *buf; /* general purpose buffer */
EXT size_t buf_size; /* size of the general purpose buffer */
EXT FILE *ofp INIT(Nullfp); /* output file pointer */
EXT FILE *rejfp INIT(Nullfp); /* reject file pointer */

4
gnu/usr.bin/patch/inp.c
View File

@ -79,7 +79,7 @@ plan_a(char *filename)
int ifd, statfailed;
Reg1 char *s;
Reg2 LINENUM iline;
char lbuf[MAXLINELEN];
char lbuf[INITLINELEN];
int output_elsewhere = strcmp(filename, outname);
extern int check_patch;
@ -284,7 +284,7 @@ plan_b(char *filename)
pfatal2("can't open file %s", filename);
if ((tifd = creat(TMPINNAME, 0666)) < 0)
pfatal2("can't open file %s", TMPINNAME);
while (fgets(buf, sizeof buf, ifp) != Nullch) {
while (fgets(buf, buf_size, ifp) != Nullch) {
if (revision != Nullch && !found_revision && rev_in_string(buf))
found_revision = TRUE;
if ((i = strlen(buf)) > maxlen)

5
gnu/usr.bin/patch/patch.c
View File

@ -155,6 +155,11 @@ char **argv;
for (i = 0; i<MAXFILEC; i++)
filearg[i] = Nullch;
buf_size = INITLINELEN;
buf = malloc((MEM)(buf_size));
if (buf == Nullch)
fatal1("out of memory\n");
myuid = getuid();
index_first = getenv ("PATCH_INDEX_FIRST") != 0;

97
gnu/usr.bin/patch/pch.c
View File

@ -87,7 +87,7 @@ open_patch_file(char *filename)
pfp = fopen(TMPPATNAME, "w");
if (pfp == Nullfp)
pfatal2("can't create %s", TMPPATNAME);
while (fgets(buf, sizeof buf, stdin) != Nullch)
while (fgets(buf, buf_size, stdin) != Nullch)
fputs(buf, pfp);
Fclose(pfp);
filename = TMPPATNAME;
@ -248,7 +248,7 @@ intuit_diff_type(void)
this_line = ftell(pfp);
indent = 0;
p_input_line++;
if (fgets(buf, sizeof buf, pfp) == Nullch) {
if (pgets(FALSE) == 0) {
if (first_command_line >= 0L) {
/* nothing but deletes!? */
p_start = first_command_line;
@ -427,15 +427,15 @@ next_intuit_at(long file_pos, long file_line)
void
skip_to(long file_pos, long file_line)
{
char *ret;
size_t len;
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);
len = pgets(FALSE);
assert(len != 0);
say2("|%s", buf);
}
say1("--------------------------\n");
@ -486,7 +486,7 @@ bool
another_hunk(void)
{
Reg1 char *s;
Reg8 char *ret;
size_t len;
Reg2 int context = 0;
while (p_end >= 0) {
@ -517,9 +517,9 @@ another_hunk(void)
Reg7 LINENUM ptrn_copiable = 0;
/* # of copiable lines in ptrn */
ret = pgets(buf, sizeof buf, pfp);
len = pgets(TRUE);
p_input_line++;
if (ret == Nullch || strnNE(buf, "********", 8)) {
if (len == 0 || strnNE(buf, "********", 8)) {
next_intuit_at(line_beginning,p_input_line);
return FALSE;
}
@ -527,9 +527,9 @@ another_hunk(void)
p_hunk_beg = p_input_line + 1;
while (p_end < p_max) {
line_beginning = ftell(pfp);
ret = pgets(buf, sizeof buf, pfp);
len = pgets(TRUE);
p_input_line++;
if (ret == Nullch) {
if (len == 0) {
if (p_max - p_end < 4)
Strcpy(buf, " \n"); /* assume blank lines got chopped */
else {
@ -839,9 +839,9 @@ another_hunk(void)
Reg5 LINENUM filldst; /* index of new lines */
char ch;
ret = pgets(buf, sizeof buf, pfp);
len = pgets(TRUE);
p_input_line++;
if (ret == Nullch || strnNE(buf, "@@ -", 4)) {
if (len == 0 || strnNE(buf, "@@ -", 4)) {
next_intuit_at(line_beginning,p_input_line);
return FALSE;
}
@ -895,9 +895,9 @@ another_hunk(void)
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);
len = pgets(TRUE);
p_input_line++;
if (ret == Nullch) {
if (len == 0) {
if (p_max - filldst < 3)
Strcpy(buf, " \n"); /* assume blank lines got chopped */
else {
@ -994,9 +994,9 @@ another_hunk(void)
long line_beginning = ftell(pfp);
p_context = 0;
ret = pgets(buf, sizeof buf, pfp);
len = pgets(TRUE);
p_input_line++;
if (ret == Nullch || !isdigit((unsigned char)*buf)) {
if (len == 0 || !isdigit((unsigned char)*buf)) {
next_intuit_at(line_beginning,p_input_line);
return FALSE;
}
@ -1035,9 +1035,9 @@ another_hunk(void)
}
p_Char[0] = '*';
for (i=1; i<=p_ptrn_lines; i++) {
ret = pgets(buf, sizeof buf, pfp);
len = pgets(TRUE);
p_input_line++;
if (ret == Nullch)
if (len == 0)
fatal2("unexpected end of file in patch at line %ld\n",
p_input_line);
if (*buf != '<')
@ -1057,9 +1057,9 @@ another_hunk(void)
}
if (hunk_type == 'c') {
ret = pgets(buf, sizeof buf, pfp);
len = pgets(TRUE);
p_input_line++;
if (ret == Nullch)
if (len == 0)
fatal2("unexpected end of file in patch at line %ld\n",
p_input_line);
if (*buf != '-')
@ -1073,9 +1073,9 @@ another_hunk(void)
}
p_Char[i] = '=';
for (i++; i<=p_end; i++) {
ret = pgets(buf, sizeof buf, pfp);
len = pgets(TRUE);
p_input_line++;
if (ret == Nullch)
if (len == 0)
fatal2("unexpected end of file in patch at line %ld\n",
p_input_line);
if (*buf != '>')
@ -1118,28 +1118,43 @@ another_hunk(void)
}
/*
* Input a line from the patch file, worrying about indentation.
* Input a line from the patch file.
* Worry about indentation if do_indent is true.
* The line is read directly into the buf global variable which
* is resized if necessary in order to hold the complete line.
* Returns the number of characters read including the terminating
* '\n', if any.
*/
char *
pgets(char *bf, int sz, FILE *fp)
size_t
pgets(bool do_indent)
{
char *ret = fgets(bf, sz, fp);
Reg1 char *s;
Reg2 int indent = 0;
char *line;
size_t len;
int indent = 0, skipped = 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++;
line = fgetln(pfp, &len);
if (line != Nullch) {
if (len + 1 > buf_size) {
while (len + 1 > buf_size)
buf_size *= 2;
free(buf);
buf = malloc(buf_size);
if (buf == Nullch)
fatal1("out of memory\n");
}
if (buf != s)
Strcpy(buf, s);
if (do_indent == TRUE && p_indent) {
for (;
indent < p_indent && (*line == ' ' || *line == '\t' || *line == 'X');
line++, skipped++) {
if (*line == '\t')
indent += 8 - (indent %7);
else
indent++;
}
}
Strlcpy(buf, line, len + 1 - skipped);
}
return ret;
return len;
}
/*
@ -1360,7 +1375,7 @@ do_ed_script(void)
}
for (;;) {
beginning_of_this_line = ftell(pfp);
if (pgets(buf, sizeof buf, pfp) == Nullch) {
if (pgets(TRUE) == 0) {
next_intuit_at(beginning_of_this_line, p_input_line);
break;
}
@ -1373,7 +1388,7 @@ do_ed_script(void)
if (!skip_rest_of_patch)
fputs(buf, pipefp);
if (*t != 'd') {
while (pgets(buf, sizeof buf, pfp) != Nullch) {
while (pgets(TRUE) != 0) {
p_input_line++;
if (!skip_rest_of_patch)
fputs(buf, pipefp);

2
gnu/usr.bin/patch/pch.h
View File

@ -32,5 +32,5 @@ LINENUM pch_context(void);
LINENUM pch_hunk_beg(void);
char pch_char(LINENUM _line);
char *pfetch(LINENUM _line);
char *pgets(char *_bf, int _sz, FILE *_fp);
size_t pgets(bool _do_indent);
void do_ed_script(void);

14
gnu/usr.bin/patch/util.c
View File

@ -46,7 +46,7 @@ move_file(char *from, char *to)
fromfd = open(from, 0);
if (fromfd < 0)
pfatal2("internal error, can't reopen %s", from);
while ((i = read(fromfd, buf, sizeof buf)) > 0)
while ((i = read(fromfd, buf, buf_size)) > 0)
if (write(1, buf, i) != 1)
pfatal1("write failed");
Close(fromfd);
@ -126,7 +126,7 @@ move_file(char *from, char *to)
fromfd = open(from, 0);
if (fromfd < 0)
pfatal2("internal error, can't reopen %s", from);
while ((i = read(fromfd, buf, sizeof buf)) > 0)
while ((i = read(fromfd, buf, buf_size)) > 0)
if (write(tofd, buf, i) != i)
pfatal1("write failed");
Close(fromfd);
@ -152,7 +152,7 @@ copy_file(char *from, char *to)
fromfd = open(from, 0);
if (fromfd < 0)
pfatal2("internal error, can't reopen %s", from);
while ((i = read(fromfd, buf, sizeof buf)) > 0)
while ((i = read(fromfd, buf, buf_size)) > 0)
if (write(tofd, buf, i) != i)
pfatal2("write to %s failed", to);
Close(fromfd);
@ -256,20 +256,20 @@ long arg1,arg2,arg3;
Fflush(stderr);
write(2, buf, strlen(buf));
if (tty2) { /* might be redirected to a file */
r = read(2, buf, sizeof buf);
r = read(2, buf, buf_size);
} else if (isatty(1)) { /* this may be new file output */
Fflush(stdout);
write(1, buf, strlen(buf));
r = read(1, buf, sizeof buf);
r = read(1, buf, buf_size);
} else if ((ttyfd = open(_PATH_TTY, 2)) >= 0 && isatty(ttyfd)) {
/* might be deleted or unwriteable */
write(ttyfd, buf, strlen(buf));
r = read(ttyfd, buf, sizeof buf);
r = read(ttyfd, buf, buf_size);
Close(ttyfd);
} else if (isatty(0)) { /* this is probably patch input */
Fflush(stdin);
write(0, buf, strlen(buf));
r = read(0, buf, sizeof buf);
r = read(0, buf, buf_size);
} else { /* no terminal at all--default it */
buf[0] = '\n';
buf[1] = 0;

2
sys/sys/param.h
View File

@ -57,7 +57,7 @@
* is created, otherwise 1.
*/
#undef __FreeBSD_version
#define __FreeBSD_version 800085 /* Master, propagated to newvers */
#define __FreeBSD_version 800086 /* Master, propagated to newvers */
#ifndef LOCORE
#include <sys/types.h>