/* $NetBSD: pch.c,v 1.22 2006/09/26 16:36:07 christos Exp $ */ /* * Copyright (c) 1988, Larry Wall * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following condition * is met: * 1. Redistributions of source code must retain the above copyright * notice, this condition and the following disclaimer. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifndef lint __RCSID("$NetBSD: pch.c,v 1.22 2006/09/26 16:36:07 christos Exp $"); #endif /* not lint */ #include "EXTERN.h" #include "common.h" #include "util.h" #include "INTERN.h" #include "pch.h" #include #include /* Patch (diff listing) abstract type. */ static long 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_context = 3; /* # of context lines */ static LINENUM p_input_line = 0; /* current line # from patch file */ static char **p_line = NULL; /* the text of the hunk */ static size_t *p_len = NULL; /* length of each line */ static char *p_char = NULL; /* +, -, and ! */ static int hunkmax = INITHUNKMAX; /* size of above arrays */ static int p_indent; /* indent to patch */ static long p_base; /* where to intuit this time */ static LINENUM p_bline; /* line # of p_base */ static long 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 */ static FILE *pfp = NULL; /* patch file pointer */ /* Prepare to look for the next patch in the patch file. */ static void malformed(void); void re_patch(void) { p_first = Nulline; p_newfirst = Nulline; p_ptrn_lines = Nulline; p_repl_lines = Nulline; p_end = -1; p_max = Nulline; p_indent = 0; } /* * Open the patch file at the beginning of time. */ void open_patch_file(char *filename) { if (filename == NULL || !*filename || strEQ(filename, "-")) { pfp = fopen(TMPPATNAME, "w"); if (pfp == NULL) pfatal("can't create %s", TMPPATNAME); while (fgets(buf, sizeof buf, stdin) != NULL) fputs(buf, pfp); Fclose(pfp); filename = TMPPATNAME; } pfp = fopen(filename, "r"); if (pfp == NULL) pfatal("patch file %s not found", filename); Fstat(fileno(pfp), &filestat); p_filesize = filestat.st_size; next_intuit_at(0L, 1); /* start at the beginning */ set_hunkmax(); } /* * Make sure our dynamically realloced tables are malloced to begin with. */ void set_hunkmax(void) { if (p_line == NULL) p_line = xmalloc(hunkmax * sizeof(char *)); if (p_len == NULL) p_len = xmalloc(hunkmax * sizeof(size_t)); if (p_char == NULL) p_char = xmalloc(hunkmax * sizeof(char)); } /* * Enlarge the arrays containing the current hunk of patch. */ void grow_hunkmax(void) { hunkmax *= 2; p_line = xrealloc(p_line, hunkmax * sizeof(char *)); p_len = xrealloc(p_len, hunkmax * sizeof(size_t)); p_char = xrealloc(p_char, hunkmax * sizeof(char)); } /* * True if the remainder of the patch file contains a diff of some sort. */ bool there_is_another_patch(void) { if (p_base != 0L && p_base >= p_filesize) { if (verbose) say("done\n"); return FALSE; } if (verbose) say("Hmm..."); diff_type = intuit_diff_type(); if (!diff_type) { if (p_base != 0L) { if (verbose) say(" Ignoring the trailing garbage.\n" "done\n"); } else say(" I can't seem to find a patch in there" " anywhere.\n"); return FALSE; } if (verbose) say(" %sooks like %s to me...\n", (p_base == 0L ? "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 (p_indent && verbose) say("(Patch is indented %d space%s.)\n", p_indent, p_indent == 1 ? "" : "s"); skip_to(p_start, p_sline); while (filearg[0] == NULL) { if (force || batch) { say("No file to patch. Skipping...\n"); if (bestguess) filearg[0] = xstrdup(bestguess); skip_rest_of_patch = TRUE; return TRUE; } ask("File to patch: "); if (*buf != '\n') { if (bestguess) free(bestguess); bestguess = xstrdup(buf); filearg[0] = fetchname(buf, 0, FALSE); } if (filearg[0] == NULL) { ask("No file found--skip this patch? [n] "); if (*buf != 'y') continue; if (verbose) say("Skipping patch...\n"); filearg[0] = fetchname(bestguess, 0, TRUE); skip_rest_of_patch = TRUE; return TRUE; } } return TRUE; } /* * Determine what kind of diff is in the remaining part of the patch file. */ int intuit_diff_type(void) { long this_line = 0; long previous_line; long first_command_line = -1; LINENUM fcl_line = -1; bool last_line_was_command = FALSE; bool this_is_a_command = FALSE; bool stars_last_line = FALSE; bool stars_this_line = FALSE; int indent; char *s; char *t; char *indtmp = NULL; char *oldtmp = NULL; char *newtmp = NULL; char *indname = NULL; char *oldname = NULL; char *newname = NULL; int retval; bool no_filearg = (filearg[0] == NULL); ok_to_create_file = FALSE; old_file_is_dev_null = FALSE; Fseek(pfp, p_base, 0); 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 = ftell(pfp); indent = 0; p_input_line++; if (fgets(buf, sizeof buf, pfp) == NULL) { if (first_command_line >= 0L) { /* 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 = 0; goto scan_exit; } } for (s = buf; *s == ' ' || *s == '\t' || *s == 'X'; s++) { if (*s == '\t') indent += 8 - (indent % 8); else indent++; } for (t = s; isdigit((unsigned char)*t) || *t == ','; t++) ; this_is_a_command = isdigit((unsigned char)*s) && (*t == 'd' || *t == 'c' || *t == 'a'); if (first_command_line < 0L && 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)) { if (oldtmp) free(oldtmp); oldtmp = xstrdup(s + 4); } else if (strnEQ(s, "--- ", 4)) { if (newtmp) free(newtmp); newtmp = xstrdup(s + 4); } else if (strnEQ(s, "+++ ", 4)) { if (oldtmp) free(oldtmp); oldtmp = xstrdup(s + 4); /* pretend it is the old name */ } else if (strnEQ(s, "Index:", 6)) { if (indtmp) free(indtmp); indtmp = xstrdup(s + 6); } else if (strnEQ(s, "Prereq:", 7)) { for (t = s + 7; isspace((unsigned char)*t); t++) ; if (revision) free(revision); revision = xstrdup(t); for (t = revision; *t && !isspace((unsigned char)*t); t++) ; *t = '\0'; if (*revision == '\0') { free(revision); revision = NULL; } } if ((!diff_type || diff_type == ED_DIFF) && first_command_line >= 0L && strEQ(s, ".\n") ) { p_indent = indent; p_start = first_command_line; p_sline = fcl_line; retval = ED_DIFF; goto scan_exit; } if ((!diff_type || diff_type == UNI_DIFF) && strnEQ(s, "@@ -", 4)) { if (!atol(s + 3)) ok_to_create_file = TRUE; p_indent = indent; p_start = this_line; p_sline = p_input_line; retval = UNI_DIFF; goto scan_exit; } stars_this_line = strnEQ(s, "********", 8); if ((!diff_type || diff_type == CONTEXT_DIFF) && stars_last_line && strnEQ(s, "*** ", 4)) { if (!atol(s + 4)) ok_to_create_file = TRUE; /* * 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); goto scan_exit; } if ((!diff_type || 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: if (no_filearg) { if (indtmp != NULL) indname = fetchname(indtmp, strippath, ok_to_create_file); if (oldtmp != NULL) { oldname = fetchname(oldtmp, strippath, ok_to_create_file); old_file_is_dev_null = filename_is_dev_null; } if (newtmp != NULL) newname = fetchname(newtmp, strippath, ok_to_create_file); if (oldname && newname) { if (strlen(oldname) < strlen(newname)) filearg[0] = xstrdup(oldname); else filearg[0] = xstrdup(newname); } else if (oldname) filearg[0] = xstrdup(oldname); else if (newname) filearg[0] = xstrdup(newname); else if (indname) filearg[0] = xstrdup(indname); } if (bestguess) { free(bestguess); bestguess = NULL; } if (filearg[0] != NULL) bestguess = xstrdup(filearg[0]); else if (indtmp != NULL) bestguess = fetchname(indtmp, strippath, TRUE); else { if (oldtmp != NULL) { oldname = fetchname(oldtmp, strippath, TRUE); old_file_is_dev_null = filename_is_dev_null; } if (newtmp != NULL) { if (newname) free(newname); newname = fetchname(newtmp, strippath, TRUE); } if (oldname && newname) { if (strlen(oldname) < strlen(newname)) bestguess = xstrdup(oldname); else bestguess = xstrdup(newname); } else if (oldname) bestguess = xstrdup(oldname); else if (newname) bestguess = xstrdup(newname); } if (indtmp != NULL) free(indtmp); if (oldtmp != NULL) free(oldtmp); if (newtmp != NULL) free(newtmp); if (indname != NULL) free(indname); if (oldname != NULL) free(oldname); if (newname != NULL) free(newname); return retval; } /* * Remember where this patch ends so we know where to start up again. */ void next_intuit_at(long file_pos, LINENUM file_line) { p_base = file_pos; p_bline = file_line; } /* * Basically a verbose fseek() to the actual diff listing. */ void skip_to(long file_pos, LINENUM file_line) { char *ret; if (p_base > file_pos) fatal("seeked too far %ld > %ld\n", p_base, file_pos); if (verbose && p_base < file_pos) { Fseek(pfp, p_base, 0); say("The text leading up to this was:\n" "--------------------------\n"); while (ftell(pfp) < file_pos) { ret = fgets(buf, sizeof buf, pfp); if (ret == NULL) fatal("Unexpected end of file\n"); say("|%s", buf); } say("--------------------------\n"); } else Fseek(pfp, file_pos, 0); p_input_line = file_line - 1; } /* * Make this a function for better debugging. */ static void malformed(void) { fatal("malformed patch at line %d: %s", p_input_line, buf); /* about as informative as "Syntax error" in C */ } /* * True if the line has been discarded (i.e. it is a line saying * "\ No newline at end of file".) */ static bool remove_special_line(void) { int c; c = fgetc(pfp); if (c == '\\') { do { c = fgetc(pfp); } while (c != EOF && c != '\n'); return TRUE; } if (c != EOF) fseek(pfp, -1L, SEEK_CUR); return FALSE; } /* * True if there is more of the current diff listing to process. */ bool another_hunk(void) { char *s; char *ret; int context = 0; 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--; } if (p_end != -1) fatal("Internal error\n"); p_efake = -1; p_max = hunkmax; /* gets reduced when --- found */ if (diff_type == CONTEXT_DIFF || diff_type == NEW_CONTEXT_DIFF) { long line_beginning = ftell(pfp); /* file pos of the current line */ LINENUM repl_beginning = 0; /* index of --- line */ LINENUM fillcnt = 0; /* #lines of missing ptrn or repl */ LINENUM fillsrc = 0; /* index of first line to copy */ LINENUM filldst = 0; /* index of first missing line */ bool ptrn_spaces_eaten = FALSE; /* ptrn was slightly misformed */ bool repl_could_be_missing = TRUE; /* no + or ! lines in this hunk */ bool repl_missing = FALSE; /* we are now backtracking */ long repl_backtrack_position = 0; /* file pos of first repl line */ LINENUM repl_patch_line = 0; /* input line number for same */ LINENUM ptrn_copiable = 0; /* # of copiable lines in ptrn */ ret = pgets(buf, sizeof buf, pfp); p_input_line++; if (ret == NULL || strnNE(buf, "********", 8)) { next_intuit_at(line_beginning,p_input_line); return FALSE; } p_context = 100; p_hunk_beg = p_input_line + 1; while (p_end < p_max) { line_beginning = ftell(pfp); ret = pgets(buf, sizeof buf, pfp); p_input_line++; if (ret == NULL) { if (p_max - p_end < 4) { /* assume blank lines got chopped */ strlcpy(buf, " \n", sizeof(buf)); } else { if (repl_beginning && repl_could_be_missing) { repl_missing = TRUE; goto hunk_done; } fatal("unexpected end of file in patch\n"); } } p_end++; if (p_end >= hunkmax) fatal("hunk larger than current buffer size\n"); p_char[p_end] = *buf; p_line[p_end] = NULL; 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 %d\n", p_input_line); } if (p_end != 0) { if (repl_beginning && repl_could_be_missing) { repl_missing = TRUE; goto hunk_done; } fatal("unexpected *** at line %d: %s", p_input_line, buf); } context = 0; p_line[p_end] = xstrdup(buf); for (s = buf; *s && !isdigit((unsigned char)*s); s++) ; if (!*s) malformed(); if (strnEQ(s, "0,0", 3)) strlcpy(s, s + 2, sizeof(buf) - (s - buf)); p_first = atoi(s); while (isdigit((unsigned char)*s)) s++; if (*s == ',') { for (; *s && !isdigit((unsigned char)*s); s++) ; if (!*s) malformed(); p_ptrn_lines = atoi(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) grow_hunkmax(); p_max = hunkmax; break; case '-': if (buf[1] == '-') { 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; fillsrc = p_end + 1; filldst = 1; fillcnt = p_ptrn_lines; } else { if (repl_beginning) { if (repl_could_be_missing) { repl_missing = TRUE; goto hunk_done; } fatal("duplicate \"---\" at line %d" "--check line numbers at line %d\n", p_input_line, p_hunk_beg + repl_beginning); } else { fatal("%s \"---\" at line %d" "--check line numbers at line %d\n", (p_end <= p_ptrn_lines ? "Premature" : "Overdue" ), p_input_line, p_hunk_beg); } } } repl_beginning = p_end; repl_backtrack_position = ftell(pfp); repl_patch_line = p_input_line; p_line[p_end] = xstrdup(buf); p_char[p_end] = '='; for (s = buf; *s && !isdigit((unsigned char)*s); s++) ; if (!*s) malformed(); p_newfirst = atoi(s); while (isdigit((unsigned char)*s)) s++; if (*s == ',') { for (; *s && !isdigit((unsigned char)*s); s++) ; if (!*s) malformed(); p_repl_lines = atoi(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; if (p_max > MAXHUNKSIZE) fatal("hunk too large (%d lines) at line %d: %s", p_max, p_input_line, buf); while (p_max >= hunkmax) grow_hunkmax(); if (p_repl_lines != ptrn_copiable && (p_context != 0 || p_repl_lines != 1)) repl_could_be_missing = FALSE; break; } goto change_line; case '+': case '!': repl_could_be_missing = FALSE; change_line: if (buf[1] == '\n' && canonicalize) strlcpy(buf + 1," \n", sizeof(buf) - 1); if (!isspace((unsigned char)buf[1]) && buf[1] != '>' && buf[1] != '<' && repl_beginning && repl_could_be_missing) { repl_missing = TRUE; goto hunk_done; } if (context >= 0) { if (context < p_context) p_context = context; context = -1000; } p_line[p_end] = xstrdup(buf + 2); if (p_end == p_ptrn_lines) { if (remove_special_line()) { int len; len = strlen(p_line[p_end]) - 1; (p_line[p_end])[len] = 0; } } break; case '\t': case '\n': /* assume the 2 spaces got eaten */ if (repl_beginning && repl_could_be_missing && (!ptrn_spaces_eaten || diff_type == NEW_CONTEXT_DIFF)) { repl_missing = TRUE; goto hunk_done; } p_line[p_end] = xstrdup(buf); if (p_end != p_ptrn_lines + 1) { ptrn_spaces_eaten |= (repl_beginning != 0); context++; if (!repl_beginning) ptrn_copiable++; p_char[p_end] = ' '; } break; case ' ': if (!isspace((unsigned char)buf[1]) && repl_beginning && repl_could_be_missing) { repl_missing = TRUE; goto hunk_done; } context++; if (!repl_beginning) ptrn_copiable++; p_line[p_end] = xstrdup(buf + 2); break; default: if (repl_beginning && repl_could_be_missing) { repl_missing = TRUE; goto hunk_done; } malformed(); } /* set up p_len for strncmp() so we don't have to */ /* assume null termination */ if (p_line[p_end]) p_len[p_end] = strlen(p_line[p_end]); else p_len[p_end] = 0; } hunk_done: if (p_end >= 0 && !repl_beginning) fatal("no --- found in patch at line %d\n", pch_hunk_beg()); if (repl_missing) { /* reset state back to just after --- */ p_input_line = repl_patch_line; for (p_end--; p_end > repl_beginning; p_end--) free(p_line[p_end]); Fseek(pfp, repl_backtrack_position, 0); /* redundant 'new' context lines were omitted - set */ /* up to fill them in from the old file context */ if (!p_context && p_repl_lines == 1) { p_repl_lines = 0; p_max--; } fillsrc = 1; filldst = repl_beginning + 1; fillcnt = p_repl_lines; p_end = p_max; } else if (!p_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; } if (diff_type == CONTEXT_DIFF && (fillcnt || (p_first > 1 && ptrn_copiable > 2 * p_context))) { if (verbose) say("%s\n", "(Fascinating--this is really a new-style context diff" "but without\nthe telltale extra asterisks on the *** " "line that usually indicate\nthe new style...)"); diff_type = 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 && p_char[fillsrc] != ' ') fillsrc++; if (fillsrc > p_end) fatal("replacement text or line numbers mangled in" " hunk at line %d\n", 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 && p_char[fillsrc] != ' ') fillsrc++; #ifdef DEBUGGING if (debug & 64) printf("fillsrc %d, filldst %d, rb %d, e %d\n", fillsrc, filldst, repl_beginning, p_end); #endif if (fillsrc != p_end + 1 && fillsrc != repl_beginning) malformed(); if (filldst != p_end + 1 && filldst != repl_beginning) malformed(); } if (p_line[p_end] != NULL) { if (remove_special_line()) { p_len[p_end] -= 1; (p_line[p_end])[p_len[p_end]] = 0; } } } else if (diff_type == UNI_DIFF) { long line_beginning = ftell(pfp); /* file pos of the current line */ LINENUM fillsrc; /* index of old lines */ LINENUM filldst; /* index of new lines */ char ch; ret = pgets(buf, sizeof buf, pfp); p_input_line++; if (ret == NULL || strnNE(buf, "@@ -", 4)) { next_intuit_at(line_beginning,p_input_line); return FALSE; } s = buf + 4; if (!*s) malformed(); p_first = atoi(s); while (isdigit((unsigned char)*s)) s++; if (*s == ',') { p_ptrn_lines = atoi(++s); while (isdigit((unsigned char)*s)) s++; } else p_ptrn_lines = 1; if (*s == ' ') s++; if (*s != '+' || !*++s) malformed(); p_newfirst = atoi(s); while (isdigit((unsigned char)*s)) s++; if (*s == ',') { p_repl_lines = atoi(++s); while (isdigit((unsigned char)*s)) s++; } else p_repl_lines = 1; if (*s == ' ') s++; if (*s != '@') malformed(); if (!p_ptrn_lines) p_first++; /* do append rather than insert */ p_max = p_ptrn_lines + p_repl_lines + 1; while (p_max >= hunkmax) grow_hunkmax(); fillsrc = 1; filldst = fillsrc + p_ptrn_lines; p_end = filldst + p_repl_lines; snprintf(buf, sizeof(buf), "*** %d,%d ****\n", p_first, p_first + p_ptrn_lines - 1); p_line[0] = xstrdup(buf); p_char[0] = '*'; snprintf(buf, sizeof(buf), "--- %d,%d ----\n", p_newfirst, p_newfirst + p_repl_lines - 1); p_line[filldst] = xstrdup(buf); p_char[filldst++] = '='; p_context = 100; context = 0; 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); p_input_line++; if (ret == NULL) { if (p_max - filldst < 3) { /* assume blank lines got chopped */ strlcpy(buf, " \n", sizeof(buf)); } else { fatal("unexpected end of file in patch\n"); } } if (*buf == '\t' || *buf == '\n') { ch = ' '; /* assume the space got eaten */ s = xstrdup(buf); } else { ch = *buf; s = xstrdup(buf + 1); } switch (ch) { case '-': if (fillsrc > p_ptrn_lines) { free(s); p_end = filldst - 1; malformed(); } p_char[fillsrc] = ch; p_line[fillsrc] = s; p_len[fillsrc++] = strlen(s); if (fillsrc > p_ptrn_lines) { if (remove_special_line()) { p_len[fillsrc - 1] -= 1; s[p_len[fillsrc - 1]] = 0; } } break; case '=': ch = ' '; /* FALLTHROUGH */ case ' ': if (fillsrc > p_ptrn_lines) { free(s); while (--filldst > p_ptrn_lines) free(p_line[filldst]); p_end = fillsrc - 1; malformed(); } context++; p_char[fillsrc] = ch; p_line[fillsrc] = s; p_len[fillsrc++] = strlen(s); s = xstrdup(s); /* FALLTHROUGH */ case '+': if (filldst > p_end) { free(s); while (--filldst > p_ptrn_lines) free(p_line[filldst]); p_end = fillsrc - 1; malformed(); } p_char[filldst] = ch; p_line[filldst] = s; p_len[filldst++] = strlen(s); if (fillsrc > p_ptrn_lines) { if (remove_special_line()) { p_len[filldst - 1] -= 1; s[p_len[filldst - 1]] = 0; } } break; default: p_end = filldst; malformed(); } if (ch != ' ' && context > 0) { if (context < p_context) p_context = context; context = -1000; } }/* while */ } else { /* normal diff--fake it up */ char hunk_type; int i; LINENUM min, max; long line_beginning = ftell(pfp); p_context = 0; ret = pgets(buf, sizeof buf, pfp); p_input_line++; if (ret == NULL || !isdigit((unsigned char)*buf)) { next_intuit_at(line_beginning, p_input_line); return FALSE; } p_first = atoi(buf); for (s = buf; isdigit((unsigned char)*s); s++) ; if (*s == ',') { p_ptrn_lines = atoi(++s) - p_first + 1; while (isdigit((unsigned char)*s)) s++; } else p_ptrn_lines = (*s != 'a'); hunk_type = *s; if (hunk_type == 'a') p_first++; /* do append rather than insert */ min = atoi(++s); for (; isdigit((unsigned char)*s); s++) ; if (*s == ',') max = atoi(++s); else max = min; if (hunk_type == 'd') min++; p_end = p_ptrn_lines + 1 + max - min + 1; if (p_end > MAXHUNKSIZE) fatal("hunk too large (%d lines) at line %d: %s", p_end, p_input_line, buf); while (p_end >= hunkmax) grow_hunkmax(); p_newfirst = min; p_repl_lines = max - min + 1; snprintf(buf, sizeof(buf), "*** %d,%d\n", p_first, p_first + p_ptrn_lines - 1); p_line[0] = xstrdup(buf); p_char[0] = '*'; for (i = 1; i <= p_ptrn_lines; i++) { ret = pgets(buf, sizeof buf, pfp); p_input_line++; if (ret == NULL) fatal("unexpected end of file in patch at line %d\n", p_input_line); if (*buf != '<') fatal("< expected at line %d of patch\n", p_input_line); p_line[i] = xstrdup(buf + 2); p_len[i] = strlen(p_line[i]); p_char[i] = '-'; } if (remove_special_line()) { p_len[i - 1] -= 1; (p_line[i - 1])[p_len[i - 1]] = 0; } if (hunk_type == 'c') { ret = pgets(buf, sizeof buf, pfp); p_input_line++; if (ret == NULL) fatal("unexpected end of file in patch at line %d\n", p_input_line); if (*buf != '-') fatal("--- expected at line %d of patch\n", p_input_line); } snprintf(buf, sizeof(buf), "--- %d,%d\n", min, max); p_line[i] = xstrdup(buf); p_char[i] = '='; for (i++; i <= p_end; i++) { ret = pgets(buf, sizeof buf, pfp); p_input_line++; if (ret == NULL) fatal("unexpected end of file in patch at line %d\n", p_input_line); if (*buf != '>') fatal("> expected at line %d of patch\n", p_input_line); p_line[i] = xstrdup(buf + 2); p_len[i] = strlen(p_line[i]); p_char[i] = '+'; } if (remove_special_line()) { p_len[i - 1] -= 1; (p_line[i - 1])[p_len[i - 1]] = 0; } } if (reverse) /* backwards patch? */ if (!pch_swap()) say("Not enough memory to swap next hunk!\n"); #ifdef DEBUGGING if (debug & 2) { int i; char special; for (i = 0; i <= p_end; i++) { if (i == p_ptrn_lines) special = '^'; else special = ' '; fprintf(stderr, "%3d %c %c %s", i, p_char[i], special, p_line[i]); Fflush(stderr); } } #endif if (p_end + 1 < hunkmax) /* paranoia reigns supreme... */ p_char[p_end + 1] = '^'; /* add a stopper for apply_hunk */ return TRUE; } /* * Input a line from the patch file, worrying about indentation. */ char * pgets(char *bf, int sz, FILE *fp) { char *ret = fgets(bf, sz, fp); char *s; int indent = 0; if (p_indent && ret != NULL) { for (s = buf; indent < p_indent && (*s == ' ' || *s == '\t' || *s == 'X'); s++) { if (*s == '\t') indent += 8 - (indent % 7); else indent++; } if (buf != s) strlcpy(buf, s, sizeof(buf)); } return ret; } /* * Reverse the old and new portions of the current hunk. */ bool pch_swap(void) { char **tp_line; /* the text of the hunk */ size_t *tp_len; /* length of each line */ char *tp_char; /* +, -, and ! */ LINENUM i; LINENUM n; bool blankline = FALSE; 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 = NULL; /* force set_hunkmax to allocate again */ p_len = NULL; p_char = NULL; set_hunkmax(); if (p_line == NULL || p_len == NULL || p_char == NULL) { if (p_line == NULL) free(p_line); p_line = tp_line; if (p_len == NULL) free(p_len); p_len = tp_len; if (p_char == NULL) 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++; } if (p_char[0] != '=') fatal("malformed patch at line %d: expected `=' found `%c'\n", p_input_line, p_char[0]); p_char[0] = '*'; for (s = p_line[0]; *s; s++) if (*s == '-') *s = '*'; /* now turn the old into the new */ if (tp_char[0] != '*') fatal("malformed patch at line %d: expected `*' found `%c'\n", p_input_line, 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]; } if (i != p_ptrn_lines + 1) fatal("malformed patch at line %d: need %d lines, got %d\n", p_input_line, p_ptrn_lines + 1, i); i = p_ptrn_lines; p_ptrn_lines = p_repl_lines; p_repl_lines = i; if (tp_line == NULL) free(tp_line); if (tp_len == NULL) free(tp_len); if (tp_char == NULL) free(tp_char); return TRUE; } /* * Return the specified line position in the old file of the old context. */ LINENUM pch_first(void) { return p_first; } /* * Return the number of lines of old context. */ LINENUM pch_ptrn_lines(void) { return p_ptrn_lines; } /* * Return the probable line position in the new file of the first line. */ LINENUM pch_newfirst(void) { return p_newfirst; } /* * Return the number of lines in the replacement text including context. */ LINENUM pch_repl_lines(void) { return p_repl_lines; } /* * Return the number of lines in the whole hunk. */ LINENUM pch_end(void) { return p_end; } /* * Return the number of context lines before the first changed line. */ LINENUM pch_context(void) { return p_context; } /* * Return the length of a particular patch line. */ size_t pch_line_len(LINENUM line) { return p_len[line]; } /* * Return the control character (+, -, *, !, etc) for a patch line. */ char pch_char(LINENUM line) { return p_char[line]; } /* * Return a pointer to a particular patch line. */ char * pfetch(LINENUM line) { return p_line[line]; } /* * Return where in the patch file this hunk began, for error messages. */ LINENUM pch_hunk_beg(void) { return p_hunk_beg; } /* * Apply an ed script by feeding ed itself. */ void do_ed_script(void) { char *t; long beginning_of_this_line; bool this_line_is_command = FALSE; FILE *pipefp = NULL; if (!skip_rest_of_patch) { Unlink(TMPOUTNAME); copy_file(filearg[0], TMPOUTNAME); if (verbose) snprintf(buf, sizeof(buf), "/bin/ed %s", TMPOUTNAME); else snprintf(buf, sizeof(buf), "/bin/ed - %s", TMPOUTNAME); pipefp = popen(buf, "w"); } for (;;) { beginning_of_this_line = ftell(pfp); if (pgets(buf, sizeof buf, pfp) == NULL) { next_intuit_at(beginning_of_this_line, p_input_line); break; } p_input_line++; for (t = buf; isdigit((unsigned char)*t) || *t == ','; t++) ; this_line_is_command = (isdigit((unsigned char)*buf) && (*t == 'd' || *t == 'c' || *t == 'a')); if (this_line_is_command) { if (!skip_rest_of_patch) fputs(buf, pipefp); if (*t != 'd') { while (pgets(buf, sizeof buf, pfp) != NULL) { p_input_line++; if (!skip_rest_of_patch) fputs(buf, pipefp); if (strEQ(buf, ".\n")) break; } } } else { next_intuit_at(beginning_of_this_line,p_input_line); break; } } if (skip_rest_of_patch) return; fprintf(pipefp, "w\n"); fprintf(pipefp, "q\n"); Fflush(pipefp); Pclose(pipefp); ignore_signals(); if (move_file(TMPOUTNAME, outname) < 0) { toutkeep = TRUE; chmod(TMPOUTNAME, filemode); } else chmod(outname, filemode); set_signals(1); }