diff options
Diffstat (limited to 'usr.bin/patch/inp.c')
-rw-r--r-- | usr.bin/patch/inp.c | 313 |
1 files changed, 0 insertions, 313 deletions
diff --git a/usr.bin/patch/inp.c b/usr.bin/patch/inp.c deleted file mode 100644 index a3eeb90..0000000 --- a/usr.bin/patch/inp.c +++ /dev/null @@ -1,313 +0,0 @@ -/* $Header: inp.c,v 2.0 86/09/17 15:37:02 lwall Exp $ - * - * $Log: inp.c,v $ - * 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, "SCCS/%s%s", SCCSPREFIX, filename); - if (stat(buf, &filestat) >= 0 || stat(buf+5, &filestat) >= 0) { - Sprintf(buf, GET, filename); - 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, (off_t)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); - for (s = string; *s; s++) { - if (isspace(*s) && strnEQ(s+1, revision, patlen) && - isspace(s[patlen+1] )) { - return TRUE; - } - } - return FALSE; -} - |