add directory study
This commit is contained in:
gohigh
319
study/linux-travel/MINIX-1.5/1.5/Source/commands/patch/inp.c
Normal file
319
study/linux-travel/MINIX-1.5/1.5/Source/commands/patch/inp.c
Normal file
@@ -0,0 +1,319 @@
|
||||
/* $Header: inp.c,v 2.0.1.1 88/06/03 15:06:13 lwall Locked $
|
||||
*
|
||||
* $Log: inp.c,v $
|
||||
* Revision 2.0.1.1 88/06/03 15:06:13 lwall
|
||||
* patch10: made a little smarter about sccs files
|
||||
*
|
||||
* Revision 2.0 86/09/17 15:37:02 lwall
|
||||
* Baseline for netwide release.
|
||||
*
|
||||
*/
|
||||
|
||||
#include "EXTERN.h"
|
||||
#include "common.h"
|
||||
#include "util.h"
|
||||
#include "pch.h"
|
||||
#include "INTERN.h"
|
||||
#include "inp.h"
|
||||
|
||||
/* Input-file-with-indexable-lines abstract type */
|
||||
|
||||
static long i_size; /* size of the input file */
|
||||
static char *i_womp; /* plan a buffer for entire file */
|
||||
static char **i_ptr; /* pointers to lines in i_womp */
|
||||
|
||||
static int tifd = -1; /* plan b virtual string array */
|
||||
static char *tibuf[2]; /* plan b buffers */
|
||||
static LINENUM tiline[2] = {-1, -1}; /* 1st line in each buffer */
|
||||
static LINENUM lines_per_buf; /* how many lines per buffer */
|
||||
static int tireclen; /* length of records in tmp file */
|
||||
|
||||
/* New patch--prepare to edit another file. */
|
||||
|
||||
void
|
||||
re_input()
|
||||
{
|
||||
if (using_plan_a) {
|
||||
i_size = 0;
|
||||
#ifndef lint
|
||||
if (i_ptr != Null(char**))
|
||||
free((char *)i_ptr);
|
||||
#endif
|
||||
if (i_womp != Nullch)
|
||||
free(i_womp);
|
||||
i_womp = Nullch;
|
||||
i_ptr = Null(char **);
|
||||
}
|
||||
else {
|
||||
using_plan_a = TRUE; /* maybe the next one is smaller */
|
||||
Close(tifd);
|
||||
tifd = -1;
|
||||
free(tibuf[0]);
|
||||
free(tibuf[1]);
|
||||
tibuf[0] = tibuf[1] = Nullch;
|
||||
tiline[0] = tiline[1] = -1;
|
||||
tireclen = 0;
|
||||
}
|
||||
}
|
||||
|
||||
/* Constuct the line index, somehow or other. */
|
||||
|
||||
void
|
||||
scan_input(filename)
|
||||
char *filename;
|
||||
{
|
||||
if (!plan_a(filename))
|
||||
plan_b(filename);
|
||||
if (verbose) {
|
||||
say3("Patching file %s using Plan %s...\n", filename,
|
||||
(using_plan_a ? "A" : "B") );
|
||||
}
|
||||
}
|
||||
|
||||
/* Try keeping everything in memory. */
|
||||
|
||||
bool
|
||||
plan_a(filename)
|
||||
char *filename;
|
||||
{
|
||||
int ifd;
|
||||
Reg1 char *s;
|
||||
Reg2 LINENUM iline;
|
||||
|
||||
if (ok_to_create_file && stat(filename, &filestat) < 0) {
|
||||
if (verbose)
|
||||
say2("(Creating file %s...)\n",filename);
|
||||
makedirs(filename, TRUE);
|
||||
close(creat(filename, 0666));
|
||||
}
|
||||
if (stat(filename, &filestat) < 0) {
|
||||
Sprintf(buf, "RCS/%s%s", filename, RCSSUFFIX);
|
||||
if (stat(buf, &filestat) >= 0 || stat(buf+4, &filestat) >= 0) {
|
||||
Sprintf(buf, CHECKOUT, filename);
|
||||
if (verbose)
|
||||
say2("Can't find %s--attempting to check it out from RCS.\n",
|
||||
filename);
|
||||
if (system(buf) || stat(filename, &filestat))
|
||||
fatal2("Can't check out %s.\n", filename);
|
||||
}
|
||||
else {
|
||||
Sprintf(buf+20, "SCCS/%s%s", SCCSPREFIX, filename);
|
||||
if (stat(s=buf+20, &filestat) >= 0 ||
|
||||
stat(s=buf+25, &filestat) >= 0) {
|
||||
Sprintf(buf, GET, s);
|
||||
if (verbose)
|
||||
say2("Can't find %s--attempting to get it from SCCS.\n",
|
||||
filename);
|
||||
if (system(buf) || stat(filename, &filestat))
|
||||
fatal2("Can't get %s.\n", filename);
|
||||
}
|
||||
else
|
||||
fatal2("Can't find %s.\n", filename);
|
||||
}
|
||||
}
|
||||
filemode = filestat.st_mode;
|
||||
if ((filemode & S_IFMT) & ~S_IFREG)
|
||||
fatal2("%s is not a normal file--can't patch.\n", filename);
|
||||
i_size = filestat.st_size;
|
||||
if (out_of_mem) {
|
||||
set_hunkmax(); /* make sure dynamic arrays are allocated */
|
||||
out_of_mem = FALSE;
|
||||
return FALSE; /* force plan b because plan a bombed */
|
||||
}
|
||||
#ifdef lint
|
||||
i_womp = Nullch;
|
||||
#else
|
||||
i_womp = malloc((MEM)(i_size+2)); /* lint says this may alloc less than */
|
||||
/* i_size, but that's okay, I think. */
|
||||
#endif
|
||||
if (i_womp == Nullch)
|
||||
return FALSE;
|
||||
if ((ifd = open(filename, 0)) < 0)
|
||||
fatal2("Can't open file %s\n", filename);
|
||||
#ifndef lint
|
||||
if (read(ifd, i_womp, (int)i_size) != i_size) {
|
||||
Close(ifd); /* probably means i_size > 15 or 16 bits worth */
|
||||
free(i_womp); /* at this point it doesn't matter if i_womp was */
|
||||
return FALSE; /* undersized. */
|
||||
}
|
||||
#endif
|
||||
Close(ifd);
|
||||
if (i_size && i_womp[i_size-1] != '\n')
|
||||
i_womp[i_size++] = '\n';
|
||||
i_womp[i_size] = '\0';
|
||||
|
||||
/* count the lines in the buffer so we know how many pointers we need */
|
||||
|
||||
iline = 0;
|
||||
for (s=i_womp; *s; s++) {
|
||||
if (*s == '\n')
|
||||
iline++;
|
||||
}
|
||||
#ifdef lint
|
||||
i_ptr = Null(char**);
|
||||
#else
|
||||
i_ptr = (char **)malloc((MEM)((iline + 2) * sizeof(char *)));
|
||||
#endif
|
||||
if (i_ptr == Null(char **)) { /* shucks, it was a near thing */
|
||||
free((char *)i_womp);
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
/* now scan the buffer and build pointer array */
|
||||
|
||||
iline = 1;
|
||||
i_ptr[iline] = i_womp;
|
||||
for (s=i_womp; *s; s++) {
|
||||
if (*s == '\n')
|
||||
i_ptr[++iline] = s+1; /* these are NOT null terminated */
|
||||
}
|
||||
input_lines = iline - 1;
|
||||
|
||||
/* now check for revision, if any */
|
||||
|
||||
if (revision != Nullch) {
|
||||
if (!rev_in_string(i_womp)) {
|
||||
if (force) {
|
||||
if (verbose)
|
||||
say2(
|
||||
"Warning: this file doesn't appear to be the %s version--patching anyway.\n",
|
||||
revision);
|
||||
}
|
||||
else {
|
||||
ask2(
|
||||
"This file doesn't appear to be the %s version--patch anyway? [n] ",
|
||||
revision);
|
||||
if (*buf != 'y')
|
||||
fatal1("Aborted.\n");
|
||||
}
|
||||
}
|
||||
else if (verbose)
|
||||
say2("Good. This file appears to be the %s version.\n",
|
||||
revision);
|
||||
}
|
||||
return TRUE; /* plan a will work */
|
||||
}
|
||||
|
||||
/* Keep (virtually) nothing in memory. */
|
||||
|
||||
void
|
||||
plan_b(filename)
|
||||
char *filename;
|
||||
{
|
||||
Reg3 FILE *ifp;
|
||||
Reg1 int i = 0;
|
||||
Reg2 int maxlen = 1;
|
||||
Reg4 bool found_revision = (revision == Nullch);
|
||||
|
||||
using_plan_a = FALSE;
|
||||
if ((ifp = fopen(filename, "r")) == Nullfp)
|
||||
fatal2("Can't open file %s\n", filename);
|
||||
if ((tifd = creat(TMPINNAME, 0666)) < 0)
|
||||
fatal2("Can't open file %s\n", TMPINNAME);
|
||||
while (fgets(buf, sizeof buf, ifp) != Nullch) {
|
||||
if (revision != Nullch && !found_revision && rev_in_string(buf))
|
||||
found_revision = TRUE;
|
||||
if ((i = strlen(buf)) > maxlen)
|
||||
maxlen = i; /* find longest line */
|
||||
}
|
||||
if (revision != Nullch) {
|
||||
if (!found_revision) {
|
||||
if (force) {
|
||||
if (verbose)
|
||||
say2(
|
||||
"Warning: this file doesn't appear to be the %s version--patching anyway.\n",
|
||||
revision);
|
||||
}
|
||||
else {
|
||||
ask2(
|
||||
"This file doesn't appear to be the %s version--patch anyway? [n] ",
|
||||
revision);
|
||||
if (*buf != 'y')
|
||||
fatal1("Aborted.\n");
|
||||
}
|
||||
}
|
||||
else if (verbose)
|
||||
say2("Good. This file appears to be the %s version.\n",
|
||||
revision);
|
||||
}
|
||||
Fseek(ifp, 0L, 0); /* rewind file */
|
||||
lines_per_buf = BUFFERSIZE / maxlen;
|
||||
tireclen = maxlen;
|
||||
tibuf[0] = malloc((MEM)(BUFFERSIZE + 1));
|
||||
tibuf[1] = malloc((MEM)(BUFFERSIZE + 1));
|
||||
if (tibuf[1] == Nullch)
|
||||
fatal1("Can't seem to get enough memory.\n");
|
||||
for (i=1; ; i++) {
|
||||
if (! (i % lines_per_buf)) /* new block */
|
||||
if (write(tifd, tibuf[0], BUFFERSIZE) < BUFFERSIZE)
|
||||
fatal1("patch: can't write temp file.\n");
|
||||
if (fgets(tibuf[0] + maxlen * (i%lines_per_buf), maxlen + 1, ifp)
|
||||
== Nullch) {
|
||||
input_lines = i - 1;
|
||||
if (i % lines_per_buf)
|
||||
if (write(tifd, tibuf[0], BUFFERSIZE) < BUFFERSIZE)
|
||||
fatal1("patch: can't write temp file.\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
Fclose(ifp);
|
||||
Close(tifd);
|
||||
if ((tifd = open(TMPINNAME, 0)) < 0) {
|
||||
fatal2("Can't reopen file %s\n", TMPINNAME);
|
||||
}
|
||||
}
|
||||
|
||||
/* Fetch a line from the input file, \n terminated, not necessarily \0. */
|
||||
|
||||
char *
|
||||
ifetch(line,whichbuf)
|
||||
Reg1 LINENUM line;
|
||||
int whichbuf; /* ignored when file in memory */
|
||||
{
|
||||
if (line < 1 || line > input_lines)
|
||||
return "";
|
||||
if (using_plan_a)
|
||||
return i_ptr[line];
|
||||
else {
|
||||
LINENUM offline = line % lines_per_buf;
|
||||
LINENUM baseline = line - offline;
|
||||
|
||||
if (tiline[0] == baseline)
|
||||
whichbuf = 0;
|
||||
else if (tiline[1] == baseline)
|
||||
whichbuf = 1;
|
||||
else {
|
||||
tiline[whichbuf] = baseline;
|
||||
#ifndef lint /* complains of long accuracy */
|
||||
Lseek(tifd, (long)baseline / lines_per_buf * BUFFERSIZE, 0);
|
||||
#endif
|
||||
if (read(tifd, tibuf[whichbuf], BUFFERSIZE) < 0)
|
||||
fatal2("Error reading tmp file %s.\n", TMPINNAME);
|
||||
}
|
||||
return tibuf[whichbuf] + (tireclen*offline);
|
||||
}
|
||||
}
|
||||
|
||||
/* True if the string argument contains the revision number we want. */
|
||||
|
||||
bool
|
||||
rev_in_string(string)
|
||||
char *string;
|
||||
{
|
||||
Reg1 char *s;
|
||||
Reg2 int patlen;
|
||||
|
||||
if (revision == Nullch)
|
||||
return TRUE;
|
||||
patlen = strlen(revision);
|
||||
if (strnEQ(string,revision,patlen) && isspace(s[patlen]))
|
||||
return TRUE;
|
||||
for (s = string; *s; s++) {
|
||||
if (isspace(*s) && strnEQ(s+1, revision, patlen) &&
|
||||
isspace(s[patlen+1] )) {
|
||||
return TRUE;
|
||||
}
|
||||
}
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user