diff options
Diffstat (limited to 'contrib/patch/pch.c')
| -rw-r--r-- | contrib/patch/pch.c | 1823 |
1 files changed, 1823 insertions, 0 deletions
diff --git a/contrib/patch/pch.c b/contrib/patch/pch.c new file mode 100644 index 0000000..64a627a --- /dev/null +++ b/contrib/patch/pch.c @@ -0,0 +1,1823 @@ +/* reading patches */ + +/* $Id: pch.c,v 1.23 1997/06/17 06:52:12 eggert Exp $ */ + +/* +Copyright 1986, 1987, 1988 Larry Wall +Copyright 1990, 1991, 1992, 1993, 1997 Free Software Foundation, Inc. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; see the file COPYING. +If not, write to the Free Software Foundation, +59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +*/ + +#define XTERN extern +#include <common.h> +#include <backupfile.h> +#include <inp.h> +#include <util.h> +#undef XTERN +#define XTERN +#include <pch.h> + +#define INITHUNKMAX 125 /* initial dynamic allocation size */ + +/* Patch (diff listing) abstract type. */ + +static FILE *pfp; /* patch file pointer */ +static int p_says_nonexistent[2]; /* [0] for old file, [1] for new; + value is 0 for nonempty, 1 for empty, 2 for nonexistent */ +static time_t p_timestamp[2]; /* timestamps in patch headers */ +static off_t 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_prefix_context; /* # of prefix context lines */ +static LINENUM p_suffix_context; /* # of suffix context lines */ +static LINENUM p_input_line; /* current line # from patch file */ +static char **p_line; /* the text of the hunk */ +static size_t *p_len; /* line length including \n if any */ +static char *p_Char; /* +, -, and ! */ +static LINENUM hunkmax = INITHUNKMAX; /* size of above arrays */ +static int p_indent; /* indent to patch */ +static file_offset p_base; /* where to intuit this time */ +static LINENUM p_bline; /* line # of p_base */ +static file_offset 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 */ + +enum nametype { OLD, NEW, INDEX, NONE }; + +static enum diff intuit_diff_type PARAMS ((void)); +static enum nametype best_name PARAMS ((char * const *, int const *)); +static int prefix_components PARAMS ((char *, int)); +static size_t pget_line PARAMS ((int)); +static size_t get_line PARAMS ((void)); +static bool incomplete_line PARAMS ((void)); +static bool grow_hunkmax PARAMS ((void)); +static void malformed PARAMS ((void)); +static void next_intuit_at PARAMS ((file_offset, LINENUM)); +static void skip_to PARAMS ((file_offset, LINENUM)); + +/* Prepare to look for the next patch in the patch file. */ + +void +re_patch() +{ + p_first = 0; + p_newfirst = 0; + p_ptrn_lines = 0; + p_repl_lines = 0; + p_end = -1; + p_max = 0; + p_indent = 0; +} + +/* Open the patch file at the beginning of time. */ + +void +open_patch_file(filename) + char const *filename; +{ + file_offset file_pos = 0; + struct stat st; + if (!filename || !*filename || strEQ (filename, "-")) + { + file_offset stdin_pos; +#if HAVE_SETMODE + if (binary_transput) + { + if (isatty (STDIN_FILENO)) + fatal ("cannot read binary data from tty on this platform"); + setmode (STDIN_FILENO, O_BINARY); + } +#endif + if (fstat (STDIN_FILENO, &st) != 0) + pfatal ("fstat"); + if (S_ISREG (st.st_mode) && (stdin_pos = file_tell (stdin)) != -1) + { + pfp = stdin; + file_pos = stdin_pos; + } + else + { + size_t charsread; + pfp = fopen (TMPPATNAME, "w+b"); + if (!pfp) + pfatal ("can't create `%s'", TMPPATNAME); + for (st.st_size = 0; + (charsread = fread (buf, 1, bufsize, stdin)) != 0; + st.st_size += charsread) + if (fwrite (buf, 1, charsread, pfp) != charsread) + write_fatal (); + if (ferror (stdin) || fclose (stdin) != 0) + read_fatal (); + if (fflush (pfp) != 0 + || file_seek (pfp, (file_offset) 0, SEEK_SET) != 0) + write_fatal (); + } + } + else + { + pfp = fopen (filename, binary_transput ? "rb" : "r"); + if (!pfp) + pfatal ("can't open patch file `%s'", filename); + if (fstat (fileno (pfp), &st) != 0) + pfatal ("fstat"); + } + p_filesize = st.st_size; + next_intuit_at (file_pos, (LINENUM) 1); + set_hunkmax(); +} + +/* Make sure our dynamically realloced tables are malloced to begin with. */ + +void +set_hunkmax() +{ + if (!p_line) + p_line = (char **) malloc (hunkmax * sizeof *p_line); + if (!p_len) + p_len = (size_t *) malloc (hunkmax * sizeof *p_len); + if (!p_Char) + p_Char = malloc (hunkmax * sizeof *p_Char); +} + +/* Enlarge the arrays containing the current hunk of patch. */ + +static bool +grow_hunkmax() +{ + hunkmax *= 2; + assert (p_line && p_len && p_Char); + if ((p_line = (char **) realloc (p_line, hunkmax * sizeof (*p_line))) + && (p_len = (size_t *) realloc (p_len, hunkmax * sizeof (*p_len))) + && (p_Char = realloc (p_Char, hunkmax * sizeof (*p_Char)))) + return TRUE; + if (!using_plan_a) + memory_fatal (); + /* Don't free previous values of p_line etc., + since some broken implementations free them for us. + Whatever is null will be allocated again from within plan_a (), + of all places. */ + return FALSE; +} + +/* True if the remainder of the patch file contains a diff of some sort. */ + +bool +there_is_another_patch() +{ + if (p_base != 0 && p_base >= p_filesize) { + if (verbosity == VERBOSE) + say ("done\n"); + return FALSE; + } + if (verbosity == VERBOSE) + say ("Hmm..."); + diff_type = intuit_diff_type(); + if (diff_type == NO_DIFF) { + if (verbosity == VERBOSE) + say (p_base + ? " Ignoring the trailing garbage.\ndone\n" + : " I can't seem to find a patch in there anywhere.\n"); + return FALSE; + } + if (skip_rest_of_patch) + { + Fseek (pfp, p_start, SEEK_SET); + p_input_line = p_sline - 1; + return TRUE; + } + if (verbosity == VERBOSE) + say (" %sooks like %s to me...\n", + (p_base == 0 ? "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 (verbosity != SILENT) + { + if (p_indent) + say ("(Patch is indented %d space%s.)\n", p_indent, p_indent==1?"":"s"); + if (! inname) + say ("can't find file to patch at input line %ld\n", + p_sline); + } + + skip_to(p_start,p_sline); + while (!inname) { + if (force || batch) { + say ("No file to patch. Skipping patch.\n"); + skip_rest_of_patch = TRUE; + return TRUE; + } + ask ("File to patch: "); + inname = fetchname (buf, 0, (time_t *) 0); + if (inname) + { + if (stat (inname, &instat) == 0) + { + inerrno = 0; + invc = -1; + } + else + { + perror (inname); + free (inname); + inname = 0; + } + } + if (!inname) { + ask ("Skip this patch? [y] "); + if (*buf != 'n') { + if (verbosity != SILENT) + say ("Skipping patch.\n"); + skip_rest_of_patch = TRUE; + return TRUE; + } + } + } + return TRUE; +} + +/* Determine what kind of diff is in the remaining part of the patch file. */ + +static enum diff +intuit_diff_type() +{ + register char *s; + register char *t; + register int indent; + register file_offset this_line = 0; + register file_offset previous_line; + register file_offset first_command_line = -1; + LINENUM fcl_line = 0; /* Pacify `gcc -W'. */ + register bool last_line_was_command = FALSE; + register bool this_is_a_command = FALSE; + register bool stars_last_line = FALSE; + register bool stars_this_line = FALSE; + enum nametype i; + char *name[3]; + struct stat st[3]; + int stat_errno[3]; + int version_controlled[3]; + register enum diff retval; + + name[OLD] = name[NEW] = name[INDEX] = 0; + version_controlled[OLD] = -1; + version_controlled[NEW] = -1; + version_controlled[INDEX] = -1; + p_timestamp[OLD] = p_timestamp[NEW] = (time_t) -1; + p_says_nonexistent[OLD] = p_says_nonexistent[NEW] = 0; + Fseek (pfp, p_base, SEEK_SET); + 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 = file_tell (pfp); + indent = 0; + if (! pget_line (0)) { + if (first_command_line >= 0) { + /* 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 = NO_DIFF; + goto scan_exit; + } + } + for (s = buf; *s == ' ' || *s == '\t' || *s == 'X'; s++) { + if (*s == '\t') + indent = (indent + 8) & ~7; + else + indent++; + } + for (t = s; ISDIGIT (*t) || *t == ','; t++) + continue; + this_is_a_command = (ISDIGIT (*s) && + (*t == 'd' || *t == 'c' || *t == 'a') ); + if (first_command_line < 0 && 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)) + name[OLD] = fetchname (s+4, strippath, &p_timestamp[OLD]); + else if (strnEQ(s, "--- ", 4)) + name[NEW] = fetchname (s+4, strippath, &p_timestamp[NEW]); + else if (strnEQ(s, "+++ ", 4)) + /* Swap with NEW below. */ + name[OLD] = fetchname (s+4, strippath, &p_timestamp[OLD]); + else if (strnEQ(s, "Index:", 6)) + name[INDEX] = fetchname (s+6, strippath, (time_t *) 0); + else if (strnEQ(s, "Prereq:", 7)) { + for (t = s + 7; ISSPACE ((unsigned char) *t); t++) + continue; + revision = t; + for (t = revision; *t && !ISSPACE ((unsigned char) *t); t++) + continue; + if (t == revision) + revision = 0; + else { + char oldc = *t; + *t = '\0'; + revision = savestr (revision); + *t = oldc; + } + } + if ((diff_type == NO_DIFF || diff_type == ED_DIFF) && + first_command_line >= 0 && + strEQ(s, ".\n") ) { + p_indent = indent; + p_start = first_command_line; + p_sline = fcl_line; + retval = ED_DIFF; + goto scan_exit; + } + if ((diff_type == NO_DIFF || diff_type == UNI_DIFF) + && strnEQ(s, "@@ -", 4)) { + + /* `name' and `p_timestamp' are backwards; swap them. */ + time_t ti = p_timestamp[OLD]; + p_timestamp[OLD] = p_timestamp[NEW]; + p_timestamp[NEW] = ti; + t = name[OLD]; + name[OLD] = name[NEW]; + name[NEW] = t; + + s += 4; + if (! atol (s)) + p_says_nonexistent[OLD] = 1 + ! p_timestamp[OLD]; + while (*s != ' ' && *s != '\n') + s++; + while (*s == ' ') + s++; + if (! atol (s)) + p_says_nonexistent[NEW] = 1 + ! p_timestamp[NEW]; + p_indent = indent; + p_start = this_line; + p_sline = p_input_line; + retval = UNI_DIFF; + if (! ((name[OLD] || ! p_timestamp[OLD]) + && (name[NEW] || ! p_timestamp[NEW]))) + say ("missing header for unified diff at line %ld of patch\n", + p_sline); + goto scan_exit; + } + stars_this_line = strnEQ(s, "********", 8); + if ((diff_type == NO_DIFF + || diff_type == CONTEXT_DIFF + || diff_type == NEW_CONTEXT_DIFF) + && stars_last_line && strnEQ (s, "*** ", 4)) { + s += 4; + if (! atol (s)) + p_says_nonexistent[OLD] = 1 + ! p_timestamp[OLD]; + /* 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); + + { + /* Scan the first hunk to see whether the file contents + appear to have been deleted. */ + file_offset saved_p_base = p_base; + LINENUM saved_p_bline = p_bline; + Fseek (pfp, previous_line, SEEK_SET); + p_input_line -= 2; + if (another_hunk (retval, 0) + && ! p_repl_lines && p_newfirst == 1) + p_says_nonexistent[NEW] = 1 + ! p_timestamp[NEW]; + next_intuit_at (saved_p_base, saved_p_bline); + } + + if (! ((name[OLD] || ! p_timestamp[OLD]) + && (name[NEW] || ! p_timestamp[NEW]))) + say ("missing header for context diff at line %ld of patch\n", + p_sline); + goto scan_exit; + } + if ((diff_type == NO_DIFF || 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: + + /* To intuit `inname', the name of the file to patch, + use the algorithm specified by POSIX 1003.2b/D11 section 5.22.7.2 + (with some modifications if posixly_correct is zero): + + - Take the old and new names from the context header if present, + and take the index name from the `Index:' line if present and + if either the old and new names are both absent + or posixly_correct is nonzero. + Consider the file names to be in the order (old, new, index). + - If some named files exist, use the first one if posixly_correct + is nonzero, the best one otherwise. + - If patch_get is nonzero, and no named files exist, + but an RCS or SCCS master file exists, + use the first named file with an RCS or SCCS master. + - If no named files exist, no RCS or SCCS master was found, + some names are given, posixly_correct is zero, + and the patch appears to create a file, then use the best name + requiring the creation of the fewest directories. + - Otherwise, report failure by setting `inname' to 0; + this causes our invoker to ask the user for a file name. */ + + i = NONE; + + if (!inname) + { + enum nametype i0 = NONE; + + if (! posixly_correct && (name[OLD] || name[NEW]) && name[INDEX]) + { + free (name[INDEX]); + name[INDEX] = 0; + } + + for (i = OLD; i <= INDEX; i++) + if (name[i]) + { + if (i0 != NONE && strcmp (name[i0], name[i]) == 0) + { + /* It's the same name as before; reuse stat results. */ + stat_errno[i] = stat_errno[i0]; + if (! stat_errno[i]) + st[i] = st[i0]; + } + else if (stat (name[i], &st[i]) != 0) + stat_errno[i] = errno; + else + { + stat_errno[i] = 0; + if (posixly_correct) + break; + } + i0 = i; + } + + if (! posixly_correct) + { + i = best_name (name, stat_errno); + + if (i == NONE && patch_get) + { + enum nametype nope = NONE; + + for (i = OLD; i <= INDEX; i++) + if (name[i]) + { + char const *cs; + char *getbuf; + char *diffbuf; + int readonly = outfile && strcmp (outfile, name[i]) != 0; + + if (nope == NONE || strcmp (name[nope], name[i]) != 0) + { + cs = (version_controller + (name[i], readonly, (struct stat *) 0, + &getbuf, &diffbuf)); + version_controlled[i] = !! cs; + if (cs) + { + if (version_get (name[i], cs, 0, readonly, + getbuf, &st[i])) + stat_errno[i] = 0; + else + version_controlled[i] = 0; + + free (getbuf); + free (diffbuf); + + if (! stat_errno[i]) + break; + } + } + + nope = i; + } + } + + if (p_says_nonexistent[reverse ^ (i == NONE || st[i].st_size == 0)]) + { + assert (i0 != NONE); + if (ok_to_reverse + ("The next patch%s would %s the file `%s',\nwhich %s!", + reverse ? ", when reversed," : "", + (i == NONE ? "delete" + : st[i].st_size == 0 ? "empty out" + : "create"), + name[i == NONE || st[i].st_size == 0 ? i0 : i], + (i == NONE ? "does not exist" + : st[i].st_size == 0 ? "is already empty" + : "already exists"))) + reverse ^= 1; + } + + if (i == NONE && p_says_nonexistent[reverse]) + { + int newdirs[3]; + int newdirs_min = INT_MAX; + int distance_from_minimum[3]; + + for (i = OLD; i <= INDEX; i++) + if (name[i]) + { + newdirs[i] = (prefix_components (name[i], 0) + - prefix_components (name[i], 1)); + if (newdirs[i] < newdirs_min) + newdirs_min = newdirs[i]; + } + + for (i = OLD; i <= INDEX; i++) + if (name[i]) + distance_from_minimum[i] = newdirs[i] - newdirs_min; + + i = best_name (name, distance_from_minimum); + } + } + } + + if (i == NONE) + inerrno = -1; + else + { + inname = name[i]; + name[i] = 0; + inerrno = stat_errno[i]; + invc = version_controlled[i]; + instat = st[i]; + } + + for (i = OLD; i <= INDEX; i++) + if (name[i]) + free (name[i]); + + return retval; +} + +/* Count the path name components in FILENAME's prefix. + If CHECKDIRS is nonzero, count only existing directories. */ +static int +prefix_components (filename, checkdirs) + char *filename; + int checkdirs; +{ + int count = 0; + struct stat stat_buf; + int stat_result; + char *f = filename + FILESYSTEM_PREFIX_LEN (filename); + + if (*f) + while (*++f) + if (ISSLASH (f[0]) && ! ISSLASH (f[-1])) + { + if (checkdirs) + { + *f = '\0'; + stat_result = stat (filename, &stat_buf); + *f = '/'; + if (! (stat_result == 0 && S_ISDIR (stat_buf.st_mode))) + break; + } + + count++; + } + + return count; +} + +/* Return the index of the best of NAME[OLD], NAME[NEW], and NAME[INDEX]. + Ignore null names, and ignore NAME[i] if IGNORE[i] is nonzero. + Return NONE if all names are ignored. */ +static enum nametype +best_name (name, ignore) + char *const *name; + int const *ignore; +{ + enum nametype i; + int components[3]; + int components_min = INT_MAX; + size_t basename_len[3]; + size_t basename_len_min = (size_t) -1; + size_t len[3]; + size_t len_min = (size_t) -1; + + for (i = OLD; i <= INDEX; i++) + if (name[i] && !ignore[i]) + { + /* Take the names with the fewest prefix components. */ + components[i] = prefix_components (name[i], 0); + if (components_min < components[i]) + continue; + components_min = components[i]; + + /* Of those, take the names with the shortest basename. */ + basename_len[i] = strlen (base_name (name[i])); + if (basename_len_min < basename_len[i]) + continue; + basename_len_min = basename_len[i]; + + /* Of those, take the shortest names. */ + len[i] = strlen (name[i]); + if (len_min < len[i]) + continue; + len_min = len[i]; + } + + /* Of those, take the first name. */ + for (i = OLD; i <= INDEX; i++) + if (name[i] && !ignore[i] + && components[i] == components_min + && basename_len[i] == basename_len_min + && len[i] == len_min) + break; + + return i; +} + +/* Remember where this patch ends so we know where to start up again. */ + +static void +next_intuit_at(file_pos,file_line) +file_offset file_pos; +LINENUM file_line; +{ + p_base = file_pos; + p_bline = file_line; +} + +/* Basically a verbose fseek() to the actual diff listing. */ + +static void +skip_to(file_pos,file_line) +file_offset file_pos; +LINENUM file_line; +{ + register FILE *i = pfp; + register FILE *o = stdout; + register int c; + + assert(p_base <= file_pos); + if ((verbosity == VERBOSE || !inname) && p_base < file_pos) { + Fseek (i, p_base, SEEK_SET); + say ("The text leading up to this was:\n--------------------------\n"); + + while (file_tell (i) < file_pos) + { + putc ('|', o); + do + { + if ((c = getc (i)) == EOF) + read_fatal (); + putc (c, o); + } + while (c != '\n'); + } + + say ("--------------------------\n"); + } + else + Fseek (i, file_pos, SEEK_SET); + p_input_line = file_line - 1; +} + +/* Make this a function for better debugging. */ +static void +malformed () +{ + fatal ("malformed patch at line %ld: %s", p_input_line, buf); + /* about as informative as "Syntax error" in C */ +} + +/* 1 if there is more of the current diff listing to process; + 0 if not; -1 if ran out of memory. */ + +int +another_hunk (difftype, rev) + enum diff difftype; + int rev; +{ + register char *s; + register LINENUM context = 0; + register size_t chars_read; + + 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 (difftype == CONTEXT_DIFF || difftype == NEW_CONTEXT_DIFF) { + file_offset line_beginning = file_tell (pfp); + /* file pos of the current line */ + LINENUM repl_beginning = 0; /* index of --- line */ + register LINENUM fillcnt = 0; /* #lines of missing ptrn or repl */ + register LINENUM fillsrc; /* index of first line to copy */ + register LINENUM filldst; /* index of first missing line */ + bool ptrn_spaces_eaten = FALSE; /* ptrn was slightly misformed */ + bool some_context = FALSE; /* (perhaps internal) context seen */ + register bool repl_could_be_missing = TRUE; + bool repl_missing = FALSE; /* we are now backtracking */ + file_offset repl_backtrack_position = 0; + /* file pos of first repl line */ + LINENUM repl_patch_line; /* input line number for same */ + LINENUM repl_context; /* context for same */ + LINENUM ptrn_prefix_context = -1; /* lines in pattern prefix context */ + LINENUM ptrn_suffix_context = -1; /* lines in pattern suffix context */ + LINENUM repl_prefix_context = -1; /* lines in replac. prefix context */ + register LINENUM ptrn_copiable = 0; + /* # of copiable lines in ptrn */ + + /* Pacify `gcc -Wall'. */ + fillsrc = filldst = repl_patch_line = repl_context = 0; + + chars_read = get_line (); + if (chars_read == (size_t) -1 + || chars_read <= 8 + || strncmp (buf, "********", 8) != 0) { + next_intuit_at(line_beginning,p_input_line); + return chars_read == (size_t) -1 ? -1 : 0; + } + p_hunk_beg = p_input_line + 1; + while (p_end < p_max) { + chars_read = get_line (); + if (chars_read == (size_t) -1) + return -1; + if (!chars_read) { + if (repl_beginning && repl_could_be_missing) { + repl_missing = TRUE; + goto hunk_done; + } + if (p_max - p_end < 4) { + strcpy (buf, " \n"); /* assume blank lines got chopped */ + chars_read = 3; + } else { + fatal ("unexpected end of file in patch"); + } + } + p_end++; + if (p_end == hunkmax) + fatal ("unterminated hunk starting at line %ld; giving up at line %ld: %s", + pch_hunk_beg (), p_input_line, buf); + assert(p_end < hunkmax); + p_Char[p_end] = *buf; + p_len[p_end] = 0; + p_line[p_end] = 0; + switch (*buf) { + case '*': + if (strnEQ(buf, "********", 8)) { + if (repl_beginning && repl_could_be_missing) { + repl_missing = TRUE; + goto hunk_done; + } + else + fatal ("unexpected end of hunk at line %ld", + p_input_line); + } + if (p_end != 0) { + if (repl_beginning && repl_could_be_missing) { + repl_missing = TRUE; + goto hunk_done; + } + fatal ("unexpected `***' at line %ld: %s", + p_input_line, buf); + } + context = 0; + p_len[p_end] = strlen (buf); + if (! (p_line[p_end] = savestr (buf))) { + p_end--; + return -1; + } + for (s = buf; *s && !ISDIGIT (*s); s++) + continue; + if (!*s) + malformed (); + if (strnEQ(s,"0,0",3)) + remove_prefix (s, 2); + p_first = (LINENUM) atol(s); + while (ISDIGIT (*s)) + s++; + if (*s == ',') { + while (*s && !ISDIGIT (*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) + if (! grow_hunkmax ()) + return -1; + p_max = hunkmax; + break; + case '-': + if (buf[1] != '-') + goto change_line; + if (ptrn_prefix_context == -1) + ptrn_prefix_context = context; + ptrn_suffix_context = context; + 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; + ptrn_prefix_context = ptrn_suffix_context = -1; + fillsrc = p_end + 1; + filldst = 1; + fillcnt = p_ptrn_lines; + } + else if (! repl_beginning) + fatal ("%s `---' at line %ld; check line numbers at line %ld", + (p_end <= p_ptrn_lines + ? "Premature" + : "Overdue"), + p_input_line, p_hunk_beg); + else if (! repl_could_be_missing) + fatal ("duplicate `---' at line %ld; check line numbers at line %ld", + p_input_line, p_hunk_beg + repl_beginning); + else + { + repl_missing = TRUE; + goto hunk_done; + } + } + repl_beginning = p_end; + repl_backtrack_position = file_tell (pfp); + repl_patch_line = p_input_line; + repl_context = context; + p_len[p_end] = strlen (buf); + if (! (p_line[p_end] = savestr (buf))) + { + p_end--; + return -1; + } + p_Char[p_end] = '='; + for (s = buf; *s && ! ISDIGIT (*s); s++) + continue; + if (!*s) + malformed (); + p_newfirst = (LINENUM) atol (s); + while (ISDIGIT (*s)) + s++; + if (*s == ',') + { + do + { + if (!*++s) + malformed (); + } + while (! ISDIGIT (*s)); + 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; + while (p_max >= hunkmax) + if (! grow_hunkmax ()) + return -1; + if (p_repl_lines != ptrn_copiable + && (p_prefix_context != 0 + || context != 0 + || p_repl_lines != 1)) + repl_could_be_missing = FALSE; + context = 0; + break; + case '+': case '!': + repl_could_be_missing = FALSE; + change_line: + s = buf + 1; + chars_read--; + if (*s == '\n' && canonicalize) { + strcpy (s, " \n"); + chars_read = 2; + } + if (*s == ' ' || *s == '\t') { + s++; + chars_read--; + } else if (repl_beginning && repl_could_be_missing) { + repl_missing = TRUE; + goto hunk_done; + } + if (! repl_beginning) + { + if (ptrn_prefix_context == -1) + ptrn_prefix_context = context; + } + else + { + if (repl_prefix_context == -1) + repl_prefix_context = context; + } + chars_read -= + (1 < chars_read + && p_end == (repl_beginning ? p_max : p_ptrn_lines) + && incomplete_line ()); + p_len[p_end] = chars_read; + if (! (p_line[p_end] = savebuf (s, chars_read))) { + p_end--; + return -1; + } + context = 0; + break; + case '\t': case '\n': /* assume spaces got eaten */ + s = buf; + if (*buf == '\t') { + s++; + chars_read--; + } + if (repl_beginning && repl_could_be_missing && + (!ptrn_spaces_eaten || difftype == NEW_CONTEXT_DIFF) ) { + repl_missing = TRUE; + goto hunk_done; + } + chars_read -= + (1 < chars_read + && p_end == (repl_beginning ? p_max : p_ptrn_lines) + && incomplete_line ()); + p_len[p_end] = chars_read; + if (! (p_line[p_end] = savebuf (buf, chars_read))) { + p_end--; + return -1; + } + if (p_end != p_ptrn_lines + 1) { + ptrn_spaces_eaten |= (repl_beginning != 0); + some_context = TRUE; + context++; + if (!repl_beginning) + ptrn_copiable++; + p_Char[p_end] = ' '; + } + break; + case ' ': + s = buf + 1; + chars_read--; + if (*s == '\n' && canonicalize) { + strcpy (s, "\n"); + chars_read = 2; + } + if (*s == ' ' || *s == '\t') { + s++; + chars_read--; + } else if (repl_beginning && repl_could_be_missing) { + repl_missing = TRUE; + goto hunk_done; + } + some_context = TRUE; + context++; + if (!repl_beginning) + ptrn_copiable++; + chars_read -= + (1 < chars_read + && p_end == (repl_beginning ? p_max : p_ptrn_lines) + && incomplete_line ()); + p_len[p_end] = chars_read; + if (! (p_line[p_end] = savebuf (buf + 2, chars_read))) { + p_end--; + return -1; + } + break; + default: + if (repl_beginning && repl_could_be_missing) { + repl_missing = TRUE; + goto hunk_done; + } + malformed (); + } + } + + hunk_done: + if (p_end >=0 && !repl_beginning) + fatal ("no `---' found in patch at line %ld", pch_hunk_beg ()); + + if (repl_missing) { + + /* reset state back to just after --- */ + p_input_line = repl_patch_line; + context = repl_context; + for (p_end--; p_end > repl_beginning; p_end--) + free(p_line[p_end]); + Fseek (pfp, repl_backtrack_position, SEEK_SET); + + /* redundant 'new' context lines were omitted - set */ + /* up to fill them in from the old file context */ + fillsrc = 1; + filldst = repl_beginning+1; + fillcnt = p_repl_lines; + p_end = p_max; + } + else if (!some_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; + } + + p_prefix_context = ((repl_prefix_context == -1 + || (ptrn_prefix_context != -1 + && ptrn_prefix_context < repl_prefix_context)) + ? ptrn_prefix_context : repl_prefix_context); + p_suffix_context = ((ptrn_suffix_context != -1 + && ptrn_suffix_context < context) + ? ptrn_suffix_context : context); + assert (p_prefix_context != -1 && p_suffix_context != -1); + + if (difftype == CONTEXT_DIFF + && (fillcnt + || (p_first > 1 + && p_prefix_context + p_suffix_context < ptrn_copiable))) { + if (verbosity == VERBOSE) + say ("%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 = difftype = 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 && fillsrc != repl_beginning + && p_Char[fillsrc] != ' ') + fillsrc++; + if (p_end < fillsrc || fillsrc == repl_beginning) + fatal ("replacement text or line numbers mangled in hunk at line %ld", + 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) + { + if (p_Char[fillsrc] == ' ') + fatal ("replacement text or line numbers mangled in hunk at line %ld", + p_hunk_beg); + fillsrc++; + } + if (debug & 64) + printf("fillsrc %ld, filldst %ld, rb %ld, e+1 %ld\n", + fillsrc,filldst,repl_beginning,p_end+1); + assert(fillsrc==p_end+1 || fillsrc==repl_beginning); + assert(filldst==p_end+1 || filldst==repl_beginning); + } + } + else if (difftype == UNI_DIFF) { + file_offset line_beginning = file_tell (pfp); + /* file pos of the current line */ + register LINENUM fillsrc; /* index of old lines */ + register LINENUM filldst; /* index of new lines */ + char ch = '\0'; + + chars_read = get_line (); + if (chars_read == (size_t) -1 + || chars_read <= 4 + || strncmp (buf, "@@ -", 4) != 0) { + next_intuit_at(line_beginning,p_input_line); + return chars_read == (size_t) -1 ? -1 : 0; + } + s = buf+4; + if (!*s) + malformed (); + p_first = (LINENUM) atol(s); + while (ISDIGIT (*s)) + s++; + if (*s == ',') { + p_ptrn_lines = (LINENUM) atol(++s); + while (ISDIGIT (*s)) + s++; + } else + p_ptrn_lines = 1; + if (*s == ' ') s++; + if (*s != '+' || !*++s) + malformed (); + p_newfirst = (LINENUM) atol(s); + while (ISDIGIT (*s)) + s++; + if (*s == ',') { + p_repl_lines = (LINENUM) atol(++s); + while (ISDIGIT (*s)) + s++; + } else + p_repl_lines = 1; + if (*s == ' ') s++; + if (*s != '@') + malformed (); + if (!p_ptrn_lines) + p_first++; /* do append rather than insert */ + if (!p_repl_lines) + p_newfirst++; + p_max = p_ptrn_lines + p_repl_lines + 1; + while (p_max >= hunkmax) + if (! grow_hunkmax ()) + return -1; + 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_len[0] = strlen (buf); + if (! (p_line[0] = savestr (buf))) { + p_end = -1; + return -1; + } + p_Char[0] = '*'; + sprintf (buf,"--- %ld,%ld ----\n",p_newfirst,p_newfirst+p_repl_lines-1); + p_len[filldst] = strlen (buf); + if (! (p_line[filldst] = savestr (buf))) { + p_end = 0; + return -1; + } + p_Char[filldst++] = '='; + p_prefix_context = -1; + p_hunk_beg = p_input_line + 1; + while (fillsrc <= p_ptrn_lines || filldst <= p_end) { + chars_read = get_line (); + if (!chars_read) { + if (p_max - filldst < 3) { + strcpy (buf, " \n"); /* assume blank lines got chopped */ + chars_read = 2; + } else { + fatal ("unexpected end of file in patch"); + } + } + if (chars_read == (size_t) -1) + s = 0; + else if (*buf == '\t' || *buf == '\n') { + ch = ' '; /* assume the space got eaten */ + s = savebuf (buf, chars_read); + } + else { + ch = *buf; + s = savebuf (buf+1, --chars_read); + } + if (!s) { + while (--filldst > p_ptrn_lines) + free(p_line[filldst]); + p_end = fillsrc-1; + return -1; + } + switch (ch) { + case '-': + if (fillsrc > p_ptrn_lines) { + free(s); + p_end = filldst-1; + malformed (); + } + chars_read -= fillsrc == p_ptrn_lines && incomplete_line (); + p_Char[fillsrc] = ch; + p_line[fillsrc] = s; + p_len[fillsrc++] = chars_read; + break; + case '=': + ch = ' '; + /* FALL THROUGH */ + case ' ': + if (fillsrc > p_ptrn_lines) { + free(s); + while (--filldst > p_ptrn_lines) + free(p_line[filldst]); + p_end = fillsrc-1; + malformed (); + } + context++; + chars_read -= fillsrc == p_ptrn_lines && incomplete_line (); + p_Char[fillsrc] = ch; + p_line[fillsrc] = s; + p_len[fillsrc++] = chars_read; + s = savebuf (s, chars_read); + if (!s) { + while (--filldst > p_ptrn_lines) + free(p_line[filldst]); + p_end = fillsrc-1; + return -1; + } + /* FALL THROUGH */ + case '+': + if (filldst > p_end) { + free(s); + while (--filldst > p_ptrn_lines) + free(p_line[filldst]); + p_end = fillsrc-1; + malformed (); + } + chars_read -= filldst == p_end && incomplete_line (); + p_Char[filldst] = ch; + p_line[filldst] = s; + p_len[filldst++] = chars_read; + break; + default: + p_end = filldst; + malformed (); + } + if (ch != ' ') { + if (p_prefix_context == -1) + p_prefix_context = context; + context = 0; + } + }/* while */ + if (p_prefix_context == -1) + malformed (); + p_suffix_context = context; + } + else { /* normal diff--fake it up */ + char hunk_type; + register int i; + LINENUM min, max; + file_offset line_beginning = file_tell (pfp); + + p_prefix_context = p_suffix_context = 0; + chars_read = get_line (); + if (chars_read == (size_t) -1 || !chars_read || !ISDIGIT (*buf)) { + next_intuit_at(line_beginning,p_input_line); + return chars_read == (size_t) -1 ? -1 : 0; + } + p_first = (LINENUM)atol(buf); + for (s = buf; ISDIGIT (*s); s++) + continue; + if (*s == ',') { + p_ptrn_lines = (LINENUM)atol(++s) - p_first + 1; + while (ISDIGIT (*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); + while (ISDIGIT (*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; + while (p_end >= hunkmax) + if (! grow_hunkmax ()) + { + p_end = -1; + return -1; + } + p_newfirst = min; + p_repl_lines = max - min + 1; + sprintf (buf, "*** %ld,%ld\n", p_first, p_first + p_ptrn_lines - 1); + p_len[0] = strlen (buf); + if (! (p_line[0] = savestr (buf))) { + p_end = -1; + return -1; + } + p_Char[0] = '*'; + for (i=1; i<=p_ptrn_lines; i++) { + chars_read = get_line (); + if (chars_read == (size_t) -1) + { + p_end = i - 1; + return -1; + } + if (!chars_read) + fatal ("unexpected end of file in patch at line %ld", + p_input_line); + if (buf[0] != '<' || (buf[1] != ' ' && buf[1] != '\t')) + fatal ("`<' expected at line %ld of patch", p_input_line); + chars_read -= 2 + (i == p_ptrn_lines && incomplete_line ()); + p_len[i] = chars_read; + if (! (p_line[i] = savebuf (buf + 2, chars_read))) { + p_end = i-1; + return -1; + } + p_Char[i] = '-'; + } + if (hunk_type == 'c') { + chars_read = get_line (); + if (chars_read == (size_t) -1) + { + p_end = i - 1; + return -1; + } + if (! chars_read) + fatal ("unexpected end of file in patch at line %ld", + p_input_line); + if (*buf != '-') + fatal ("`---' expected at line %ld of patch", p_input_line); + } + sprintf (buf, "--- %ld,%ld\n", min, max); + p_len[i] = strlen (buf); + if (! (p_line[i] = savestr (buf))) { + p_end = i-1; + return -1; + } + p_Char[i] = '='; + for (i++; i<=p_end; i++) { + chars_read = get_line (); + if (chars_read == (size_t) -1) + { + p_end = i - 1; + return -1; + } + if (!chars_read) + fatal ("unexpected end of file in patch at line %ld", + p_input_line); + if (buf[0] != '>' || (buf[1] != ' ' && buf[1] != '\t')) + fatal ("`>' expected at line %ld of patch", p_input_line); + chars_read -= 2 + (i == p_end && incomplete_line ()); + p_len[i] = chars_read; + if (! (p_line[i] = savebuf (buf + 2, chars_read))) { + p_end = i-1; + return -1; + } + p_Char[i] = '+'; + } + } + if (rev) /* backwards patch? */ + if (!pch_swap()) + say ("Not enough memory to swap next hunk!\n"); + if (debug & 2) { + LINENUM i; + char special; + + for (i=0; i <= p_end; i++) { + if (i == p_ptrn_lines) + special = '^'; + else + special = ' '; + fprintf (stderr, "%3ld %c %c ", i, p_Char[i], special); + pch_write_line (i, stderr); + fflush (stderr); + } + } + if (p_end+1 < hunkmax) /* paranoia reigns supreme... */ + p_Char[p_end+1] = '^'; /* add a stopper for apply_hunk */ + return 1; +} + +static size_t +get_line () +{ + return pget_line (p_indent); +} + +/* Input a line from the patch file, worrying about indentation. + Strip up to INDENT characters' worth of leading indentation. + Ignore any partial lines at end of input, but warn about them. + Succeed if a line was read; it is terminated by "\n\0" for convenience. + Return the number of characters read, including '\n' but not '\0'. + Return -1 if we ran out of memory. */ + +static size_t +pget_line (indent) + int indent; +{ + register FILE *fp = pfp; + register int c; + register int i = 0; + register char *b; + register size_t s; + + for (;;) + { + c = getc (fp); + if (c == EOF) + { + if (ferror (fp)) + read_fatal (); + return 0; + } + if (indent <= i) + break; + if (c == ' ' || c == 'X') + i++; + else if (c == '\t') + i = (i + 8) & ~7; + else + break; + } + + i = 0; + b = buf; + s = bufsize; + + for (;;) + { + if (i == s - 1) + { + s *= 2; + b = realloc (b, s); + if (!b) + { + if (!using_plan_a) + memory_fatal (); + return (size_t) -1; + } + buf = b; + bufsize = s; + } + b[i++] = c; + if (c == '\n') + break; + c = getc (fp); + if (c == EOF) + { + if (ferror (fp)) + read_fatal (); + say ("patch unexpectedly ends in middle of line\n"); + return 0; + } + } + + b[i] = '\0'; + p_input_line++; + return i; +} + +static bool +incomplete_line () +{ + register FILE *fp = pfp; + register int c; + register file_offset line_beginning = file_tell (fp); + + if (getc (fp) == '\\') + { + while ((c = getc (fp)) != '\n' && c != EOF) + continue; + return TRUE; + } + else + { + /* We don't trust ungetc. */ + Fseek (pfp, line_beginning, SEEK_SET); + return FALSE; + } +} + +/* Reverse the old and new portions of the current hunk. */ + +bool +pch_swap() +{ + char **tp_line; /* the text of the hunk */ + size_t *tp_len; /* length of each line */ + char *tp_char; /* +, -, and ! */ + register LINENUM i; + register LINENUM n; + bool blankline = FALSE; + register 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 = 0; /* force set_hunkmax to allocate again */ + p_len = 0; + p_Char = 0; + set_hunkmax(); + if (!p_line || !p_len || !p_Char) { + if (p_line) + free (p_line); + p_line = tp_line; + if (p_len) + free (p_len); + p_len = tp_len; + if (p_Char) + free (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; + if (tp_line) + free (tp_line); + if (tp_len) + free (tp_len); + if (tp_char) + free (tp_char); + return TRUE; +} + +/* Return whether file WHICH (0 = old, 1 = new) appears to nonexistent. + Return 1 for empty, 2 for nonexistent. */ + +bool +pch_says_nonexistent (which) + int which; +{ + return p_says_nonexistent[which]; +} + +/* Return timestamp of patch header for file WHICH (0 = old, 1 = new), + or -1 if there was no timestamp or an error in the timestamp. */ + +time_t +pch_timestamp (which) + int which; +{ + return p_timestamp[which]; +} + +/* Return the specified line position in the old file of the old context. */ + +LINENUM +pch_first() +{ + return p_first; +} + +/* Return the number of lines of old context. */ + +LINENUM +pch_ptrn_lines() +{ + return p_ptrn_lines; +} + +/* Return the probable line position in the new file of the first line. */ + +LINENUM +pch_newfirst() +{ + return p_newfirst; +} + +/* Return the number of lines in the replacement text including context. */ + +LINENUM +pch_repl_lines() +{ + return p_repl_lines; +} + +/* Return the number of lines in the whole hunk. */ + +LINENUM +pch_end() +{ + return p_end; +} + +/* Return the number of context lines before the first changed line. */ + +LINENUM +pch_prefix_context () +{ + return p_prefix_context; +} + +/* Return the number of context lines after the last changed line. */ + +LINENUM +pch_suffix_context () +{ + return p_suffix_context; +} + +/* Return the length of a particular patch line. */ + +size_t +pch_line_len(line) +LINENUM line; +{ + return p_len[line]; +} + +/* Return the control character (+, -, *, !, etc) for a patch line. */ + +char +pch_char(line) +LINENUM line; +{ + return p_Char[line]; +} + +/* Return a pointer to a particular patch line. */ + +char * +pfetch(line) +LINENUM line; +{ + return p_line[line]; +} + +/* Output a patch line. */ + +bool +pch_write_line (line, file) + LINENUM line; + FILE *file; +{ + bool after_newline = p_line[line][p_len[line] - 1] == '\n'; + if (! fwrite (p_line[line], sizeof (*p_line[line]), p_len[line], file)) + write_fatal (); + return after_newline; +} + +/* Return where in the patch file this hunk began, for error messages. */ + +LINENUM +pch_hunk_beg() +{ + return p_hunk_beg; +} + +/* Apply an ed script by feeding ed itself. */ + +void +do_ed_script (ofp) + FILE *ofp; +{ + static char const ed_program[] = ed_PROGRAM; + + register char *t; + register file_offset beginning_of_this_line; + register bool this_line_is_command = FALSE; + register FILE *pipefp = 0; + register size_t chars_read; + + if (!skip_rest_of_patch) { + assert (! inerrno); + copy_file (inname, TMPOUTNAME, instat.st_mode); + sprintf (buf, "%s %s%s", ed_program, verbosity == VERBOSE ? "" : "- ", + TMPOUTNAME); + fflush (stdout); + pipefp = popen(buf, binary_transput ? "wb" : "w"); + if (!pipefp) + pfatal ("can't open pipe to `%s'", buf); + } + for (;;) { + beginning_of_this_line = file_tell (pfp); + chars_read = get_line (); + if (! chars_read) { + next_intuit_at(beginning_of_this_line,p_input_line); + break; + } + for (t = buf; ISDIGIT (*t) || *t == ','; t++) + continue; + this_line_is_command = (ISDIGIT (*buf) && + (*t == 'd' || *t == 'c' || *t == 'a' || *t == 'i' || *t == 's') ); + if (this_line_is_command) { + if (pipefp) + if (! fwrite (buf, sizeof *buf, chars_read, pipefp)) + write_fatal (); + if (*t != 'd' && *t != 's') { + while ((chars_read = get_line ()) != 0) { + if (pipefp) + if (! fwrite (buf, sizeof *buf, chars_read, pipefp)) + write_fatal (); + if (chars_read == 2 && strEQ (buf, ".\n")) + break; + } + } + } + else { + next_intuit_at(beginning_of_this_line,p_input_line); + break; + } + } + if (!pipefp) + return; + if (fwrite ("w\nq\n", sizeof (char), (size_t) 4, pipefp) == 0 + || fflush (pipefp) != 0) + write_fatal (); + if (pclose (pipefp) != 0) + fatal ("%s FAILED", ed_program); + + if (ofp) + { + FILE *ifp = fopen (TMPOUTNAME, binary_transput ? "rb" : "r"); + int c; + if (!ifp) + pfatal ("can't open `%s'", TMPOUTNAME); + while ((c = getc (ifp)) != EOF) + if (putc (c, ofp) == EOF) + write_fatal (); + if (ferror (ifp) || fclose (ifp) != 0) + read_fatal (); + } +} |
