Category : C Source Code
Archive   : PATCH12.ZIP
Filename : INP.C

 
Output of file : INP.C contained in archive : PATCH12.ZIP
/* $Header: inp.c,v 2.0.1.3 90/07/15 13:52:00 aas $
*
* $Log: inp.c,v $
* Revision 2.0.1.3 90/07/15 13:52:00 aas
* include bugfix reported by [email protected] in rev_in_string()
* regarding parameter string[] typo in first strnEQ() line
*
* Revision 2.0.1.2 90/05/30 11:30:00 mward
* if TURBOC20 have plan_a check against MAXMEMBLK before mallocs
* if TURBOC20 have plan_b use binary mode io for tmp file
* modified plan_a to allow for translation shrinkage on text reads
* modify calls to read, write to detect error on return value of -1
*
* 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 */
}
i_womp = Nullch;
#ifndef lint
#ifdef TURBOC20
if (i_size < MAXMEMBLK)
#endif
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 ((i_size=(unsigned)read(ifd, i_womp, (int)i_size)) == (unsigned)-1) {
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++;
}
i_ptr = Null(char**);
#ifndef lint
#ifdef TURBOC20
if (iline+2 #endif
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);
#ifdef TURBOC20
setmode(tifd, O_BINARY);
#endif
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) == -1)
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) == -1)
fatal1("patch: can't write temp file.\n");
break;
}
}
Fclose(ifp);
Close(tifd);
#ifdef TURBOC20
if ((tifd = open(TMPINNAME, O_BINARY)) < 0) {
#else
if ((tifd = open(TMPINNAME, 0)) < 0) {
#endif
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) == -1)
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(string[patlen]))
return TRUE;
for (s = string; *s; s++) {
if (isspace(*s) && strnEQ(s+1, revision, patlen) &&
isspace(s[patlen+1] )) {
return TRUE;
}
}
return FALSE;
}



  3 Responses to “Category : C Source Code
Archive   : PATCH12.ZIP
Filename : INP.C

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/