diff options
Diffstat (limited to 'usr.bin/patch/pch.c')
| -rw-r--r-- | usr.bin/patch/pch.c | 1108 |
1 files changed, 0 insertions, 1108 deletions
diff --git a/usr.bin/patch/pch.c b/usr.bin/patch/pch.c deleted file mode 100644 index 8837212..0000000 --- a/usr.bin/patch/pch.c +++ /dev/null @@ -1,1108 +0,0 @@ -/* $Header: pch.c,v 2.0.1.6 87/06/04 16:18:13 lwall Exp $ - * - * $Log: pch.c,v $ - * Revision 2.0.1.6 87/06/04 16:18:13 lwall - * pch_swap didn't swap p_bfake and p_efake. - * - * Revision 2.0.1.5 87/01/30 22:47:42 lwall - * Improved responses to mangled patches. - * - * Revision 2.0.1.4 87/01/05 16:59:53 lwall - * New-style context diffs caused double call to free(). - * - * Revision 2.0.1.3 86/11/14 10:08:33 lwall - * Fixed problem where a long pattern wouldn't grow the hunk. - * Also restored p_input_line when backtracking so error messages are right. - * - * Revision 2.0.1.2 86/11/03 17:49:52 lwall - * New-style delete triggers spurious assertion error. - * - * Revision 2.0.1.1 86/10/29 15:52:08 lwall - * Could falsely report new-style context diff. - * - * Revision 2.0 86/09/17 15:39:37 lwall - * Baseline for netwide release. - * - */ - -#include "EXTERN.h" -#include "common.h" -#include "util.h" -#include "INTERN.h" -#include "pch.h" - -/* 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(char**); /* the text of the hunk */ -static short *p_len = Null(short*); /* length of each line */ -static char *p_char = Nullch; /* +, -, and ! */ -static int hunkmax = INITHUNKMAX; /* size of above arrays to begin with */ -static int p_indent; /* indent to patch */ -static LINENUM p_base; /* where to intuit this time */ -static LINENUM p_bline; /* line # of p_base */ -static LINENUM 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 */ - -/* Prepare to look for the next patch in the patch file. */ - -void -re_patch() -{ - p_first = Nulline; - p_newfirst = Nulline; - p_ptrn_lines = Nulline; - p_repl_lines = Nulline; - p_end = (LINENUM)-1; - p_max = Nulline; - p_indent = 0; -} - -/* Open the patch file at the beginning of time. */ - -void -open_patch_file(filename) -char *filename; -{ - if (filename == Nullch || !*filename || strEQ(filename, "-")) { - pfp = fopen(TMPPATNAME, "w"); - if (pfp == Nullfp) - fatal2("patch: can't create %s.\n", TMPPATNAME); - while (fgets(buf, sizeof buf, stdin) != Nullch) - fputs(buf, pfp); - Fclose(pfp); - filename = TMPPATNAME; - } - pfp = fopen(filename, "r"); - if (pfp == Nullfp) - fatal2("patch file %s not found\n", filename); - Fstat(fileno(pfp), &filestat); - p_filesize = filestat.st_size; - next_intuit_at(0L,1L); /* start at the beginning */ - set_hunkmax(); -} - -/* Make sure our dynamically realloced tables are malloced to begin with. */ - -void -set_hunkmax() -{ -#ifndef lint - if (p_line == Null(char**)) - p_line = (char**) malloc((MEM)hunkmax * sizeof(char *)); - if (p_len == Null(short*)) - p_len = (short*) malloc((MEM)hunkmax * sizeof(short)); -#endif - if (p_char == Nullch) - p_char = (char*) malloc((MEM)hunkmax * sizeof(char)); -} - -/* Enlarge the arrays containing the current hunk of patch. */ - -void -grow_hunkmax() -{ - hunkmax *= 2; - /* - * Note that on most systems, only the p_line array ever gets fresh memory - * since p_len can move into p_line's old space, and p_char can move into - * p_len's old space. Not on PDP-11's however. But it doesn't matter. - */ - assert(p_line != Null(char**) && p_len != Null(short*) && p_char != Nullch); -#ifndef lint - p_line = (char**) realloc((char*)p_line, (MEM)hunkmax * sizeof(char *)); - p_len = (short*) realloc((char*)p_len, (MEM)hunkmax * sizeof(short)); - p_char = (char*) realloc((char*)p_char, (MEM)hunkmax * sizeof(char)); -#endif - if (p_line != Null(char**) && p_len != Null(short*) && p_char != Nullch) - return; - if (!using_plan_a) - fatal1("patch: out of memory (grow_hunkmax)\n"); - out_of_mem = TRUE; /* whatever is null will be allocated again */ - /* from within plan_a(), of all places */ -} - -/* True if the remainder of the patch file contains a diff of some sort. */ - -bool -there_is_another_patch() -{ - if (p_base != 0L && p_base >= p_filesize) { - if (verbose) - say1("done\n"); - return FALSE; - } - if (verbose) - say1("Hmm..."); - diff_type = intuit_diff_type(); - if (!diff_type) { - if (p_base != 0L) { - if (verbose) - say1(" Ignoring the trailing garbage.\ndone\n"); - } - else - say1(" I can't seem to find a patch in there anywhere.\n"); - return FALSE; - } - if (verbose) - say3(" %sooks like %s to me...\n", - (p_base == 0L ? "L" : "The next patch l"), - 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) - say3("(Patch is indented %d space%s.)\n", p_indent, p_indent==1?"":"s"); - skip_to(p_start,p_sline); - while (filearg[0] == Nullch) { - if (force) { - say1("No file to patch. Skipping...\n"); - filearg[0] = savestr(bestguess); - return TRUE; - } - ask1("File to patch: "); - if (*buf != '\n') { - if (bestguess) - free(bestguess); - bestguess = savestr(buf); - filearg[0] = fetchname(buf, 0, FALSE); - } - if (filearg[0] == Nullch) { - ask1("No file found--skip this patch? [n] "); - if (*buf != 'y') { - continue; - } - if (verbose) - say1("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() -{ - Reg4 long this_line = 0; - Reg5 long previous_line; - Reg6 long first_command_line = -1; - long fcl_line; - Reg7 bool last_line_was_command = FALSE; - Reg8 bool this_is_a_command = FALSE; - Reg9 bool stars_last_line = FALSE; - Reg10 bool stars_this_line = FALSE; - Reg3 int indent; - Reg1 char *s; - Reg2 char *t; - char *indtmp = Nullch; - char *oldtmp = Nullch; - char *newtmp = Nullch; - char *indname = Nullch; - char *oldname = Nullch; - char *newname = Nullch; - Reg11 int retval; - bool no_filearg = (filearg[0] == Nullch); - - ok_to_create_file = 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) == Nullch) { - 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++) { - if (*s == '\t') - indent += 8 - (indent % 8); - else - indent++; - } - for (t=s; isdigit(*t) || *t == ','; t++) ; - this_is_a_command = (isdigit(*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)) - oldtmp = savestr(s+4); - else if (strnEQ(s, "--- ", 4)) - newtmp = savestr(s+4); - else if (strnEQ(s, "Index:", 6)) - indtmp = savestr(s+6); - else if (strnEQ(s, "Prereq:", 7)) { - for (t=s+7; isspace(*t); t++) ; - revision = savestr(t); - for (t=revision; *t && !isspace(*t); t++) ; - *t = '\0'; - if (!*revision) { - free(revision); - revision = Nullch; - } - } - 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; - } - 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 != Nullch) - indname = fetchname(indtmp, strippath, ok_to_create_file); - if (oldtmp != Nullch) - oldname = fetchname(oldtmp, strippath, ok_to_create_file); - if (newtmp != Nullch) - newname = fetchname(newtmp, strippath, ok_to_create_file); - if (oldname && newname) { - if (strlen(oldname) < strlen(newname)) - filearg[0] = savestr(oldname); - else - filearg[0] = savestr(newname); - } - else if (oldname) - filearg[0] = savestr(oldname); - else if (newname) - filearg[0] = savestr(newname); - else if (indname) - filearg[0] = savestr(indname); - } - if (bestguess) { - free(bestguess); - bestguess = Nullch; - } - if (filearg[0] != Nullch) - bestguess = savestr(filearg[0]); - else if (indtmp != Nullch) - bestguess = fetchname(indtmp, strippath, TRUE); - else { - if (oldtmp != Nullch) - oldname = fetchname(oldtmp, strippath, TRUE); - if (newtmp != Nullch) - newname = fetchname(newtmp, strippath, TRUE); - if (oldname && newname) { - if (strlen(oldname) < strlen(newname)) - bestguess = savestr(oldname); - else - bestguess = savestr(newname); - } - else if (oldname) - bestguess = savestr(oldname); - else if (newname) - bestguess = savestr(newname); - } - if (indtmp != Nullch) - free(indtmp); - if (oldtmp != Nullch) - free(oldtmp); - if (newtmp != Nullch) - free(newtmp); - if (indname != Nullch) - free(indname); - if (oldname != Nullch) - free(oldname); - if (newname != Nullch) - free(newname); - return retval; -} - -/* Remember where this patch ends so we know where to start up again. */ - -void -next_intuit_at(file_pos,file_line) -long file_pos; -long file_line; -{ - p_base = file_pos; - p_bline = file_line; -} - -/* Basically a verbose fseek() to the actual diff listing. */ - -void -skip_to(file_pos,file_line) -long file_pos; -long file_line; -{ - char *ret; - - assert(p_base <= file_pos); - if (verbose && p_base < file_pos) { - Fseek(pfp, p_base, 0); - say1("The text leading up to this was:\n--------------------------\n"); - while (ftell(pfp) < file_pos) { - ret = fgets(buf, sizeof buf, pfp); - assert(ret != Nullch); - say2("|%s", buf); - } - say1("--------------------------\n"); - } - else - Fseek(pfp, file_pos, 0); - p_input_line = file_line - 1; -} - -/* True if there is more of the current diff listing to process. */ - -bool -another_hunk() -{ - Reg1 char *s; - Reg8 char *ret; - Reg2 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--; - } - assert(p_end == -1); - 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 */ - Reg4 LINENUM fillcnt = 0; /* #lines of missing ptrn or repl */ - Reg5 LINENUM fillsrc; /* index of first line to copy */ - Reg6 LINENUM filldst; /* index of first missing line */ - bool ptrn_spaces_eaten = FALSE; /* ptrn was slightly misformed */ - Reg9 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; /* input line number for same */ - Reg7 LINENUM ptrn_copiable = 0; - /* # of copiable lines in ptrn */ - - ret = pgets(buf, sizeof buf, pfp); - p_input_line++; - if (ret == Nullch || 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 == Nullch) { - if (p_max - p_end < 4) - Strcpy(buf, " \n"); /* assume blank lines got chopped */ - else { - if (repl_beginning && repl_could_be_missing) { - repl_missing = TRUE; - goto hunk_done; - } - fatal1("Unexpected end of file in patch.\n"); - } - } - p_end++; - assert(p_end < hunkmax); - p_char[p_end] = *buf; - p_line[p_end] = Nullch; - switch (*buf) { - case '*': - if (strnEQ(buf, "********", 8)) { - if (repl_beginning && repl_could_be_missing) { - repl_missing = TRUE; - goto hunk_done; - } - else - fatal2("Unexpected end of hunk at line %ld.\n", - p_input_line); - } - if (p_end != 0) { - if (repl_beginning && repl_could_be_missing) { - repl_missing = TRUE; - goto hunk_done; - } - fatal3("Unexpected *** at line %ld: %s", p_input_line, buf); - } - context = 0; - p_line[p_end] = savestr(buf); - if (out_of_mem) { - p_end--; - return FALSE; - } - for (s=buf; *s && !isdigit(*s); s++) ; - if (!*s) - goto malformed; - p_first = (LINENUM) atol(s); - while (isdigit(*s)) s++; - if (*s == ',') { - for (; *s && !isdigit(*s); s++) ; - if (!*s) - goto 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) - 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; - } - fatal3( -"Duplicate \"---\" at line %ld--check line numbers at line %ld.\n", - p_input_line, p_hunk_beg + repl_beginning); - } - else { - fatal4( -"%s \"---\" at line %ld--check line numbers at line %ld.\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] = savestr(buf); - if (out_of_mem) { - p_end--; - return FALSE; - } - p_char[p_end] = '='; - for (s=buf; *s && !isdigit(*s); s++) ; - if (!*s) - goto malformed; - p_newfirst = (LINENUM) atol(s); - while (isdigit(*s)) s++; - if (*s == ',') { - for (; *s && !isdigit(*s); s++) ; - if (!*s) - goto malformed; - 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; - if (p_max > MAXHUNKSIZE) - fatal4("Hunk too large (%ld lines) at line %ld: %s", - p_max, p_input_line, buf); - while (p_max >= hunkmax) - grow_hunkmax(); - if (p_repl_lines != ptrn_copiable) - repl_could_be_missing = FALSE; - break; - } - goto change_line; - case '+': case '!': - repl_could_be_missing = FALSE; - change_line: - if (!isspace(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] = savestr(buf+2); - if (out_of_mem) { - p_end--; - return FALSE; - } - 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] = savestr(buf); - if (out_of_mem) { - p_end--; - return FALSE; - } - 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(buf[1]) && - repl_beginning && repl_could_be_missing) { - repl_missing = TRUE; - goto hunk_done; - } - context++; - if (!repl_beginning) - ptrn_copiable++; - p_line[p_end] = savestr(buf+2); - if (out_of_mem) { - p_end--; - return FALSE; - } - break; - default: - if (repl_beginning && repl_could_be_missing) { - repl_missing = TRUE; - goto hunk_done; - } - goto 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) - fatal2("No --- found in patch at line %ld\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 */ - fillsrc = 1; - filldst = repl_beginning+1; - fillcnt = p_repl_lines; - p_end = p_max; - } - - if (diff_type == CONTEXT_DIFF && - (fillcnt || (p_first > 1 && ptrn_copiable > 2*p_context)) ) { - if (verbose) - say1("\ -(Fascinating--this is really a new-style context diff but without the telltale\n\ -extra asterisks on the *** line that usually indicate the new style...)\n"); - 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) - fatal2("Replacement text or line numbers mangled in hunk at line %ld\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 %ld, filldst %ld, rb %ld, e+1 %ld\n", - fillsrc,filldst,repl_beginning,p_end+1); -#endif - assert(fillsrc==p_end+1 || fillsrc==repl_beginning); - assert(filldst==p_end+1 || filldst==repl_beginning); - } - } - else { /* normal diff--fake it up */ - char hunk_type; - Reg3 int i; - LINENUM min, max; - long line_beginning = ftell(pfp); - - p_context = 0; - ret = pgets(buf, sizeof buf, pfp); - p_input_line++; - if (ret == Nullch || !isdigit(*buf)) { - next_intuit_at(line_beginning,p_input_line); - return FALSE; - } - p_first = (LINENUM)atol(buf); - for (s=buf; isdigit(*s); s++) ; - 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); - for (; 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; - if (p_end > MAXHUNKSIZE) - fatal4("Hunk too large (%ld lines) at line %ld: %s", - p_end, p_input_line, buf); - while (p_end >= hunkmax) - grow_hunkmax(); - p_newfirst = min; - p_repl_lines = max - min + 1; - Sprintf(buf, "*** %ld,%ld\n", p_first, p_first + p_ptrn_lines - 1); - p_line[0] = savestr(buf); - if (out_of_mem) { - p_end = -1; - return FALSE; - } - p_char[0] = '*'; - for (i=1; i<=p_ptrn_lines; i++) { - ret = pgets(buf, sizeof buf, pfp); - p_input_line++; - if (ret == Nullch) - fatal2("Unexpected end of file in patch at line %ld.\n", - p_input_line); - if (*buf != '<') - fatal2("< expected at line %ld of patch.\n", p_input_line); - p_line[i] = savestr(buf+2); - if (out_of_mem) { - p_end = i-1; - return FALSE; - } - p_len[i] = strlen(p_line[i]); - p_char[i] = '-'; - } - if (hunk_type == 'c') { - ret = pgets(buf, sizeof buf, pfp); - p_input_line++; - if (ret == Nullch) - fatal2("Unexpected end of file in patch at line %ld.\n", - p_input_line); - if (*buf != '-') - fatal2("--- expected at line %ld of patch.\n", p_input_line); - } - Sprintf(buf, "--- %ld,%ld\n", min, max); - p_line[i] = savestr(buf); - if (out_of_mem) { - p_end = i-1; - return FALSE; - } - p_char[i] = '='; - for (i++; i<=p_end; i++) { - ret = pgets(buf, sizeof buf, pfp); - p_input_line++; - if (ret == Nullch) - fatal2("Unexpected end of file in patch at line %ld.\n", - p_input_line); - if (*buf != '>') - fatal2("> expected at line %ld of patch.\n", p_input_line); - p_line[i] = savestr(buf+2); - if (out_of_mem) { - p_end = i-1; - return FALSE; - } - p_len[i] = strlen(p_line[i]); - p_char[i] = '+'; - } - } - if (reverse) /* backwards patch? */ - if (!pch_swap()) - say1("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; - -malformed: - fatal3("Malformed patch at line %ld: %s", p_input_line, buf); - /* about as informative as "Syntax error" in C */ - return FALSE; /* for lint */ -} - -/* Input a line from the patch file, worrying about indentation. */ - -char * -pgets(bf,sz,fp) -char *bf; -int sz; -FILE *fp; -{ - char *ret = fgets(bf, sz, fp); - Reg1 char *s; - Reg2 int indent = 0; - - if (p_indent && ret != Nullch) { - for (s=buf; indent < p_indent && (*s == ' ' || *s == '\t'); s++) { - if (*s == '\t') - indent += 8 - (indent % 7); - else - indent++; - } - if (buf != s) - Strcpy(buf, s); - } - return ret; -} - -/* Reverse the old and new portions of the current hunk. */ - -bool -pch_swap() -{ - char **tp_line; /* the text of the hunk */ - short *tp_len; /* length of each line */ - char *tp_char; /* +, -, and ! */ - Reg1 LINENUM i; - Reg2 LINENUM n; - bool blankline = FALSE; - Reg3 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(char**); /* force set_hunkmax to allocate again */ - p_len = Null(short*); - p_char = Nullch; - set_hunkmax(); - if (p_line == Null(char**) || p_len == Null(short*) || p_char == Nullch) { -#ifndef lint - if (p_line == Null(char**)) - free((char*)p_line); - p_line = tp_line; - if (p_len == Null(short*)) - free((char*)p_len); - p_len = tp_len; -#endif - if (p_char == Nullch) - free((char*)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 */ - n = p_end - i + 1; - if (p_efake > i) - n = -n; - 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; -#ifndef lint - if (tp_line == Null(char**)) - free((char*)tp_line); - if (tp_len == Null(short*)) - free((char*)tp_len); -#endif - if (tp_char == Nullch) - free((char*)tp_char); - return TRUE; -} - -/* 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_context() -{ - return p_context; -} - -/* Return the length of a particular patch line. */ - -short -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]; -} - -/* 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() -{ - Reg1 char *t; - Reg2 long beginning_of_this_line; - Reg3 bool this_line_is_command = FALSE; - Reg4 FILE *pipefp; - FILE *popen(); - - if (!skip_rest_of_patch) { - Unlink(TMPOUTNAME); - copy_file(filearg[0], TMPOUTNAME); - if (verbose) - Sprintf(buf, "/bin/ed %s", TMPOUTNAME); - else - Sprintf(buf, "/bin/ed - %s", TMPOUTNAME); - pipefp = popen(buf, "w"); - } - for (;;) { - beginning_of_this_line = ftell(pfp); - if (pgets(buf, sizeof buf, pfp) == Nullch) { - next_intuit_at(beginning_of_this_line,p_input_line); - break; - } - p_input_line++; - for (t=buf; isdigit(*t) || *t == ','; t++) ; - this_line_is_command = (isdigit(*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) != Nullch) { - 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(); -} |
