Introduce nvim namespace: Move files.

Move files from src/ to src/nvim/.
- src/nvim/ becomes the new root dir for nvim executable sources.
- src/libnvim/ is planned to become root dir of the neovim library.

1 files changed, 3688 insertions, 0 deletions

diff --git a/src/nvim/quickfix.c b/src/nvim/quickfix.c
new file mode 100644
index 0000000000..94b2b05501
--- /dev/null
+++ b/src/nvim/quickfix.c
@@ -0,0 +1,3688 @@
+/*
+ * VIM - Vi IMproved	by Bram Moolenaar
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+
+/*
+ * quickfix.c: functions for quickfix mode, using a file with error messages
+ */
+
+#include <string.h>
+
+#include "vim.h"
+#include "quickfix.h"
+#include "buffer.h"
+#include "charset.h"
+#include "edit.h"
+#include "eval.h"
+#include "ex_cmds.h"
+#include "ex_cmds2.h"
+#include "ex_docmd.h"
+#include "ex_eval.h"
+#include "ex_getln.h"
+#include "fileio.h"
+#include "fold.h"
+#include "mark.h"
+#include "mbyte.h"
+#include "memline.h"
+#include "message.h"
+#include "misc1.h"
+#include "misc2.h"
+#include "memory.h"
+#include "move.h"
+#include "normal.h"
+#include "option.h"
+#include "os_unix.h"
+#include "path.h"
+#include "regexp.h"
+#include "screen.h"
+#include "search.h"
+#include "term.h"
+#include "ui.h"
+#include "window.h"
+#include "os/os.h"
+
+
+struct dir_stack_T {
+  struct dir_stack_T  *next;
+  char_u              *dirname;
+};
+
+static struct dir_stack_T   *dir_stack = NULL;
+
+/*
+ * For each error the next struct is allocated and linked in a list.
+ */
+typedef struct qfline_S qfline_T;
+struct qfline_S {
+  qfline_T    *qf_next;         /* pointer to next error in the list */
+  qfline_T    *qf_prev;         /* pointer to previous error in the list */
+  linenr_T qf_lnum;             /* line number where the error occurred */
+  int qf_fnum;                  /* file number for the line */
+  int qf_col;                   /* column where the error occurred */
+  int qf_nr;                    /* error number */
+  char_u      *qf_pattern;      /* search pattern for the error */
+  char_u      *qf_text;         /* description of the error */
+  char_u qf_viscol;             /* set to TRUE if qf_col is screen column */
+  char_u qf_cleared;            /* set to TRUE if line has been deleted */
+  char_u qf_type;               /* type of the error (mostly 'E'); 1 for
+                                   :helpgrep */
+  char_u qf_valid;              /* valid error message detected */
+};
+
+/*
+ * There is a stack of error lists.
+ */
+#define LISTCOUNT   10
+
+typedef struct qf_list_S {
+  qfline_T    *qf_start;        /* pointer to the first error */
+  qfline_T    *qf_ptr;          /* pointer to the current error */
+  int qf_count;                 /* number of errors (0 means no error list) */
+  int qf_index;                 /* current index in the error list */
+  int qf_nonevalid;             /* TRUE if not a single valid entry found */
+  char_u      *qf_title;        /* title derived from the command that created
+                                 * the error list */
+} qf_list_T;
+
+struct qf_info_S {
+  /*
+   * Count of references to this list. Used only for location lists.
+   * When a location list window reference this list, qf_refcount
+   * will be 2. Otherwise, qf_refcount will be 1. When qf_refcount
+   * reaches 0, the list is freed.
+   */
+  int qf_refcount;
+  int qf_listcount;                 /* current number of lists */
+  int qf_curlist;                   /* current error list */
+  qf_list_T qf_lists[LISTCOUNT];
+};
+
+static qf_info_T ql_info;       /* global quickfix list */
+
+#define FMT_PATTERNS 10         /* maximum number of % recognized */
+
+/*
+ * Structure used to hold the info of one part of 'errorformat'
+ */
+typedef struct efm_S efm_T;
+struct efm_S {
+  regprog_T       *prog;        /* pre-formatted part of 'errorformat' */
+  efm_T           *next;        /* pointer to next (NULL if last) */
+  char_u addr[FMT_PATTERNS];            /* indices of used % patterns */
+  char_u prefix;                /* prefix of this format line: */
+                                /*   'D' enter directory */
+                                /*   'X' leave directory */
+                                /*   'A' start of multi-line message */
+                                /*   'E' error message */
+                                /*   'W' warning message */
+                                /*   'I' informational message */
+                                /*   'C' continuation line */
+                                /*   'Z' end of multi-line message */
+                                /*   'G' general, unspecific message */
+                                /*   'P' push file (partial) message */
+                                /*   'Q' pop/quit file (partial) message */
+                                /*   'O' overread (partial) message */
+  char_u flags;                 /* additional flags given in prefix */
+                                /*   '-' do not include this line */
+                                /*   '+' include whole line in message */
+  int conthere;                 /* %> used */
+};
+
+static int qf_init_ext(qf_info_T *qi, char_u *efile, buf_T *buf,
+                       typval_T *tv, char_u *errorformat, int newlist,
+                       linenr_T lnumfirst,
+                       linenr_T lnumlast,
+                       char_u *qf_title);
+static void qf_new_list(qf_info_T *qi, char_u *qf_title);
+static void ll_free_all(qf_info_T **pqi);
+static int qf_add_entry(qf_info_T *qi, qfline_T **prevp, char_u *dir,
+                        char_u *fname, int bufnum, char_u *mesg,
+                        long lnum, int col, int vis_col,
+                        char_u *pattern, int nr, int type,
+                        int valid);
+static qf_info_T *ll_new_list(void);
+static void qf_msg(qf_info_T *qi);
+static void qf_free(qf_info_T *qi, int idx);
+static char_u   *qf_types(int, int);
+static int qf_get_fnum(char_u *, char_u *);
+static char_u   *qf_push_dir(char_u *, struct dir_stack_T **);
+static char_u   *qf_pop_dir(struct dir_stack_T **);
+static char_u   *qf_guess_filepath(char_u *);
+static void qf_fmt_text(char_u *text, char_u *buf, int bufsize);
+static void qf_clean_dir_stack(struct dir_stack_T **);
+static int qf_win_pos_update(qf_info_T *qi, int old_qf_index);
+static int is_qf_win(win_T *win, qf_info_T *qi);
+static win_T    *qf_find_win(qf_info_T *qi);
+static buf_T    *qf_find_buf(qf_info_T *qi);
+static void qf_update_buffer(qf_info_T *qi);
+static void qf_set_title(qf_info_T *qi);
+static void qf_fill_buffer(qf_info_T *qi);
+static char_u   *get_mef_name(void);
+static void restore_start_dir(char_u *dirname_start);
+static buf_T    *load_dummy_buffer(char_u *fname, char_u *dirname_start,
+                                           char_u *resulting_dir);
+static void wipe_dummy_buffer(buf_T *buf, char_u *dirname_start);
+static void unload_dummy_buffer(buf_T *buf, char_u *dirname_start);
+static qf_info_T *ll_get_or_alloc_list(win_T *);
+
+/* Quickfix window check helper macro */
+#define IS_QF_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref == NULL)
+/* Location list window check helper macro */
+#define IS_LL_WINDOW(wp) (bt_quickfix(wp->w_buffer) && wp->w_llist_ref != NULL)
+/*
+ * Return location list for window 'wp'
+ * For location list window, return the referenced location list
+ */
+#define GET_LOC_LIST(wp) (IS_LL_WINDOW(wp) ? wp->w_llist_ref : wp->w_llist)
+
+/*
+ * Read the errorfile "efile" into memory, line by line, building the error
+ * list. Set the error list's title to qf_title.
+ * Return -1 for error, number of errors for success.
+ */
+int 
+qf_init (
+    win_T *wp,
+    char_u *efile,
+    char_u *errorformat,
+    int newlist,                            /* TRUE: start a new error list */
+    char_u *qf_title
+)
+{
+  qf_info_T       *qi = &ql_info;
+
+  if (efile == NULL)
+    return FAIL;
+
+  if (wp != NULL) {
+    qi = ll_get_or_alloc_list(wp);
+  }
+
+  return qf_init_ext(qi, efile, curbuf, NULL, errorformat, newlist,
+      (linenr_T)0, (linenr_T)0,
+      qf_title);
+}
+
+/*
+ * Read the errorfile "efile" into memory, line by line, building the error
+ * list.
+ * Alternative: when "efile" is null read errors from buffer "buf".
+ * Always use 'errorformat' from "buf" if there is a local value.
+ * Then "lnumfirst" and "lnumlast" specify the range of lines to use.
+ * Set the title of the list to "qf_title".
+ * Return -1 for error, number of errors for success.
+ */
+static int 
+qf_init_ext (
+    qf_info_T *qi,
+    char_u *efile,
+    buf_T *buf,
+    typval_T *tv,
+    char_u *errorformat,
+    int newlist,                            /* TRUE: start a new error list */
+    linenr_T lnumfirst,                     /* first line number to use */
+    linenr_T lnumlast,                      /* last line number to use */
+    char_u *qf_title
+)
+{
+  char_u          *namebuf;
+  char_u          *errmsg;
+  char_u          *pattern;
+  char_u          *fmtstr = NULL;
+  int col = 0;
+  char_u use_viscol = FALSE;
+  int type = 0;
+  int valid;
+  linenr_T buflnum = lnumfirst;
+  long lnum = 0L;
+  int enr = 0;
+  FILE            *fd = NULL;
+  qfline_T        *qfprev = NULL;       /* init to make SASC shut up */
+  char_u          *efmp;
+  efm_T           *fmt_first = NULL;
+  efm_T           *fmt_last = NULL;
+  efm_T           *fmt_ptr;
+  efm_T           *fmt_start = NULL;
+  char_u          *efm;
+  char_u          *ptr;
+  char_u          *srcptr;
+  int len;
+  int i;
+  int round;
+  int idx = 0;
+  int multiline = FALSE;
+  int multiignore = FALSE;
+  int multiscan = FALSE;
+  int retval = -1;                      /* default: return error flag */
+  char_u          *directory = NULL;
+  char_u          *currfile = NULL;
+  char_u          *tail = NULL;
+  char_u          *p_str = NULL;
+  listitem_T      *p_li = NULL;
+  struct dir_stack_T  *file_stack = NULL;
+  regmatch_T regmatch;
+  static struct fmtpattern {
+    char_u convchar;
+    char    *pattern;
+  }               fmt_pat[FMT_PATTERNS] =
+  {
+    {'f', ".\\+"},                          /* only used when at end */
+    {'n', "\\d\\+"},
+    {'l', "\\d\\+"},
+    {'c', "\\d\\+"},
+    {'t', "."},
+    {'m', ".\\+"},
+    {'r', ".*"},
+    {'p', "[- 	.]*"},
+    {'v', "\\d\\+"},
+    {'s', ".\\+"}
+  };
+
+  namebuf = alloc(CMDBUFFSIZE + 1);
+  errmsg = alloc(CMDBUFFSIZE + 1);
+  pattern = alloc(CMDBUFFSIZE + 1);
+
+  if (efile != NULL && (fd = mch_fopen((char *)efile, "r")) == NULL) {
+    EMSG2(_(e_openerrf), efile);
+    goto qf_init_end;
+  }
+
+  if (newlist || qi->qf_curlist == qi->qf_listcount)
+    /* make place for a new list */
+    qf_new_list(qi, qf_title);
+  else if (qi->qf_lists[qi->qf_curlist].qf_count > 0)
+    /* Adding to existing list, find last entry. */
+    for (qfprev = qi->qf_lists[qi->qf_curlist].qf_start;
+         qfprev->qf_next != qfprev; qfprev = qfprev->qf_next)
+      ;
+
+  /*
+   * Each part of the format string is copied and modified from errorformat to
+   * regex prog.  Only a few % characters are allowed.
+   */
+  /* Use the local value of 'errorformat' if it's set. */
+  if (errorformat == p_efm && tv == NULL && *buf->b_p_efm != NUL)
+    efm = buf->b_p_efm;
+  else
+    efm = errorformat;
+  /*
+   * Get some space to modify the format string into.
+   */
+  i = 3 * FMT_PATTERNS + 4 * (int)STRLEN(efm);
+  for (round = FMT_PATTERNS; round > 0; )
+    i += (int)STRLEN(fmt_pat[--round].pattern);
+#ifdef COLON_IN_FILENAME
+  i += 12;   /* "%f" can become twelve chars longer */
+#else
+  i += 2;   /* "%f" can become two chars longer */
+#endif
+  fmtstr = alloc(i);
+
+  while (efm[0] != NUL) {
+    /*
+     * Allocate a new eformat structure and put it at the end of the list
+     */
+    fmt_ptr = xcalloc(1, sizeof(efm_T));
+    if (fmt_first == NULL)          /* first one */
+      fmt_first = fmt_ptr;
+    else
+      fmt_last->next = fmt_ptr;
+    fmt_last = fmt_ptr;
+
+    /*
+     * Isolate one part in the 'errorformat' option
+     */
+    for (len = 0; efm[len] != NUL && efm[len] != ','; ++len)
+      if (efm[len] == '\\' && efm[len + 1] != NUL)
+        ++len;
+
+    /*
+     * Build regexp pattern from current 'errorformat' option
+     */
+    ptr = fmtstr;
+    *ptr++ = '^';
+    round = 0;
+    for (efmp = efm; efmp < efm + len; ++efmp) {
+      if (*efmp == '%') {
+        ++efmp;
+        for (idx = 0; idx < FMT_PATTERNS; ++idx)
+          if (fmt_pat[idx].convchar == *efmp)
+            break;
+        if (idx < FMT_PATTERNS) {
+          if (fmt_ptr->addr[idx]) {
+            sprintf((char *)errmsg,
+                _("E372: Too many %%%c in format string"), *efmp);
+            EMSG(errmsg);
+            goto error2;
+          }
+          if ((idx
+               && idx < 6
+               && vim_strchr((char_u *)"DXOPQ",
+                   fmt_ptr->prefix) != NULL)
+              || (idx == 6
+                  && vim_strchr((char_u *)"OPQ",
+                      fmt_ptr->prefix) == NULL)) {
+            sprintf((char *)errmsg,
+                _("E373: Unexpected %%%c in format string"), *efmp);
+            EMSG(errmsg);
+            goto error2;
+          }
+          fmt_ptr->addr[idx] = (char_u)++ round;
+          *ptr++ = '\\';
+          *ptr++ = '(';
+#ifdef BACKSLASH_IN_FILENAME
+          if (*efmp == 'f') {
+            /* Also match "c:" in the file name, even when
+             * checking for a colon next: "%f:".
+             * "\%(\a:\)\=" */
+            STRCPY(ptr, "\\%(\\a:\\)\\=");
+            ptr += 10;
+          }
+#endif
+          if (*efmp == 'f' && efmp[1] != NUL) {
+            if (efmp[1] != '\\' && efmp[1] != '%') {
+              /* A file name may contain spaces, but this isn't
+               * in "\f".  For "%f:%l:%m" there may be a ":" in
+               * the file name.  Use ".\{-1,}x" instead (x is
+               * the next character), the requirement that :999:
+               * follows should work. */
+              STRCPY(ptr, ".\\{-1,}");
+              ptr += 7;
+            } else {
+              /* File name followed by '\\' or '%': include as
+               * many file name chars as possible. */
+              STRCPY(ptr, "\\f\\+");
+              ptr += 4;
+            }
+          } else {
+            srcptr = (char_u *)fmt_pat[idx].pattern;
+            while ((*ptr = *srcptr++) != NUL)
+              ++ptr;
+          }
+          *ptr++ = '\\';
+          *ptr++ = ')';
+        } else if (*efmp == '*') {
+          if (*++efmp == '[' || *efmp == '\\') {
+            if ((*ptr++ = *efmp) == '[') {              /* %*[^a-z0-9] etc. */
+              if (efmp[1] == '^')
+                *ptr++ = *++efmp;
+              if (efmp < efm + len) {
+                *ptr++ = *++efmp;                           /* could be ']' */
+                while (efmp < efm + len
+                       && (*ptr++ = *++efmp) != ']')
+                  /* skip */;
+                if (efmp == efm + len) {
+                  EMSG(_("E374: Missing ] in format string"));
+                  goto error2;
+                }
+              }
+            } else if (efmp < efm + len)                /* %*\D, %*\s etc. */
+              *ptr++ = *++efmp;
+            *ptr++ = '\\';
+            *ptr++ = '+';
+          } else {
+            /* TODO: scanf()-like: %*ud, %*3c, %*f, ... ? */
+            sprintf((char *)errmsg,
+                _("E375: Unsupported %%%c in format string"), *efmp);
+            EMSG(errmsg);
+            goto error2;
+          }
+        } else if (vim_strchr((char_u *)"%\\.^$~[", *efmp) != NULL)
+          *ptr++ = *efmp;                       /* regexp magic characters */
+        else if (*efmp == '#')
+          *ptr++ = '*';
+        else if (*efmp == '>')
+          fmt_ptr->conthere = TRUE;
+        else if (efmp == efm + 1) {                     /* analyse prefix */
+          if (vim_strchr((char_u *)"+-", *efmp) != NULL)
+            fmt_ptr->flags = *efmp++;
+          if (vim_strchr((char_u *)"DXAEWICZGOPQ", *efmp) != NULL)
+            fmt_ptr->prefix = *efmp;
+          else {
+            sprintf((char *)errmsg,
+                _("E376: Invalid %%%c in format string prefix"), *efmp);
+            EMSG(errmsg);
+            goto error2;
+          }
+        } else {
+          sprintf((char *)errmsg,
+              _("E377: Invalid %%%c in format string"), *efmp);
+          EMSG(errmsg);
+          goto error2;
+        }
+      } else {                        /* copy normal character */
+        if (*efmp == '\\' && efmp + 1 < efm + len)
+          ++efmp;
+        else if (vim_strchr((char_u *)".*^$~[", *efmp) != NULL)
+          *ptr++ = '\\';                /* escape regexp atoms */
+        if (*efmp)
+          *ptr++ = *efmp;
+      }
+    }
+    *ptr++ = '$';
+    *ptr = NUL;
+    if ((fmt_ptr->prog = vim_regcomp(fmtstr, RE_MAGIC + RE_STRING)) == NULL)
+      goto error2;
+    /*
+     * Advance to next part
+     */
+    efm = skip_to_option_part(efm + len);       /* skip comma and spaces */
+  }
+  if (fmt_first == NULL) {      /* nothing found */
+    EMSG(_("E378: 'errorformat' contains no pattern"));
+    goto error2;
+  }
+
+  /*
+   * got_int is reset here, because it was probably set when killing the
+   * ":make" command, but we still want to read the errorfile then.
+   */
+  got_int = FALSE;
+
+  /* Always ignore case when looking for a matching error. */
+  regmatch.rm_ic = TRUE;
+
+  if (tv != NULL) {
+    if (tv->v_type == VAR_STRING)
+      p_str = tv->vval.v_string;
+    else if (tv->v_type == VAR_LIST)
+      p_li = tv->vval.v_list->lv_first;
+  }
+
+  /*
+   * Read the lines in the error file one by one.
+   * Try to recognize one of the error formats in each line.
+   */
+  while (!got_int) {
+    /* Get the next line. */
+    if (fd == NULL) {
+      if (tv != NULL) {
+        if (tv->v_type == VAR_STRING) {
+          /* Get the next line from the supplied string */
+          char_u *p;
+
+          if (!*p_str)           /* Reached the end of the string */
+            break;
+
+          p = vim_strchr(p_str, '\n');
+          if (p)
+            len = (int)(p - p_str + 1);
+          else
+            len = (int)STRLEN(p_str);
+
+          if (len > CMDBUFFSIZE - 2)
+            vim_strncpy(IObuff, p_str, CMDBUFFSIZE - 2);
+          else
+            vim_strncpy(IObuff, p_str, len);
+
+          p_str += len;
+        } else if (tv->v_type == VAR_LIST) {
+          /* Get the next line from the supplied list */
+          while (p_li && p_li->li_tv.v_type != VAR_STRING)
+            p_li = p_li->li_next;               /* Skip non-string items */
+
+          if (!p_li)                            /* End of the list */
+            break;
+
+          len = (int)STRLEN(p_li->li_tv.vval.v_string);
+          if (len > CMDBUFFSIZE - 2)
+            len = CMDBUFFSIZE - 2;
+
+          vim_strncpy(IObuff, p_li->li_tv.vval.v_string, len);
+
+          p_li = p_li->li_next;                 /* next item */
+        }
+      } else {
+        /* Get the next line from the supplied buffer */
+        if (buflnum > lnumlast)
+          break;
+        vim_strncpy(IObuff, ml_get_buf(buf, buflnum++, FALSE),
+            CMDBUFFSIZE - 2);
+      }
+    } else if (fgets((char *)IObuff, CMDBUFFSIZE - 2, fd) == NULL)
+      break;
+
+    IObuff[CMDBUFFSIZE - 2] = NUL;      /* for very long lines */
+    remove_bom(IObuff);
+
+    if ((efmp = vim_strrchr(IObuff, '\n')) != NULL)
+      *efmp = NUL;
+#ifdef USE_CRNL
+    if ((efmp = vim_strrchr(IObuff, '\r')) != NULL)
+      *efmp = NUL;
+#endif
+
+    /* If there was no %> item start at the first pattern */
+    if (fmt_start == NULL)
+      fmt_ptr = fmt_first;
+    else {
+      fmt_ptr = fmt_start;
+      fmt_start = NULL;
+    }
+
+    /*
+     * Try to match each part of 'errorformat' until we find a complete
+     * match or no match.
+     */
+    valid = TRUE;
+restofline:
+    for (; fmt_ptr != NULL; fmt_ptr = fmt_ptr->next) {
+      idx = fmt_ptr->prefix;
+      if (multiscan && vim_strchr((char_u *)"OPQ", idx) == NULL)
+        continue;
+      namebuf[0] = NUL;
+      pattern[0] = NUL;
+      if (!multiscan)
+        errmsg[0] = NUL;
+      lnum = 0;
+      col = 0;
+      use_viscol = FALSE;
+      enr = -1;
+      type = 0;
+      tail = NULL;
+
+      regmatch.regprog = fmt_ptr->prog;
+      if (vim_regexec(&regmatch, IObuff, (colnr_T)0)) {
+        if ((idx == 'C' || idx == 'Z') && !multiline)
+          continue;
+        if (vim_strchr((char_u *)"EWI", idx) != NULL)
+          type = idx;
+        else
+          type = 0;
+        /*
+         * Extract error message data from matched line.
+         * We check for an actual submatch, because "\[" and "\]" in
+         * the 'errorformat' may cause the wrong submatch to be used.
+         */
+        if ((i = (int)fmt_ptr->addr[0]) > 0) {                  /* %f */
+          int c;
+
+          if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
+            continue;
+
+          /* Expand ~/file and $HOME/file to full path. */
+          c = *regmatch.endp[i];
+          *regmatch.endp[i] = NUL;
+          expand_env(regmatch.startp[i], namebuf, CMDBUFFSIZE);
+          *regmatch.endp[i] = c;
+
+          if (vim_strchr((char_u *)"OPQ", idx) != NULL
+              && !os_file_exists(namebuf))
+            continue;
+        }
+        if ((i = (int)fmt_ptr->addr[1]) > 0) {                  /* %n */
+          if (regmatch.startp[i] == NULL)
+            continue;
+          enr = (int)atol((char *)regmatch.startp[i]);
+        }
+        if ((i = (int)fmt_ptr->addr[2]) > 0) {                  /* %l */
+          if (regmatch.startp[i] == NULL)
+            continue;
+          lnum = atol((char *)regmatch.startp[i]);
+        }
+        if ((i = (int)fmt_ptr->addr[3]) > 0) {                  /* %c */
+          if (regmatch.startp[i] == NULL)
+            continue;
+          col = (int)atol((char *)regmatch.startp[i]);
+        }
+        if ((i = (int)fmt_ptr->addr[4]) > 0) {                  /* %t */
+          if (regmatch.startp[i] == NULL)
+            continue;
+          type = *regmatch.startp[i];
+        }
+        if (fmt_ptr->flags == '+' && !multiscan)                /* %+ */
+          STRCPY(errmsg, IObuff);
+        else if ((i = (int)fmt_ptr->addr[5]) > 0) {             /* %m */
+          if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
+            continue;
+          len = (int)(regmatch.endp[i] - regmatch.startp[i]);
+          vim_strncpy(errmsg, regmatch.startp[i], len);
+        }
+        if ((i = (int)fmt_ptr->addr[6]) > 0) {                  /* %r */
+          if (regmatch.startp[i] == NULL)
+            continue;
+          tail = regmatch.startp[i];
+        }
+        if ((i = (int)fmt_ptr->addr[7]) > 0) {                  /* %p */
+          char_u      *match_ptr;
+
+          if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
+            continue;
+          col = 0;
+          for (match_ptr = regmatch.startp[i];
+               match_ptr != regmatch.endp[i]; ++match_ptr) {
+            ++col;
+            if (*match_ptr == TAB) {
+              col += 7;
+              col -= col % 8;
+            }
+          }
+          ++col;
+          use_viscol = TRUE;
+        }
+        if ((i = (int)fmt_ptr->addr[8]) > 0) {                  /* %v */
+          if (regmatch.startp[i] == NULL)
+            continue;
+          col = (int)atol((char *)regmatch.startp[i]);
+          use_viscol = TRUE;
+        }
+        if ((i = (int)fmt_ptr->addr[9]) > 0) {                  /* %s */
+          if (regmatch.startp[i] == NULL || regmatch.endp[i] == NULL)
+            continue;
+          len = (int)(regmatch.endp[i] - regmatch.startp[i]);
+          if (len > CMDBUFFSIZE - 5)
+            len = CMDBUFFSIZE - 5;
+          STRCPY(pattern, "^\\V");
+          STRNCAT(pattern, regmatch.startp[i], len);
+          pattern[len + 3] = '\\';
+          pattern[len + 4] = '$';
+          pattern[len + 5] = NUL;
+        }
+        break;
+      }
+    }
+    multiscan = FALSE;
+
+    if (fmt_ptr == NULL || idx == 'D' || idx == 'X') {
+      if (fmt_ptr != NULL) {
+        if (idx == 'D') {                               /* enter directory */
+          if (*namebuf == NUL) {
+            EMSG(_("E379: Missing or empty directory name"));
+            goto error2;
+          }
+          if ((directory = qf_push_dir(namebuf, &dir_stack)) == NULL)
+            goto error2;
+        } else if (idx == 'X')                          /* leave directory */
+          directory = qf_pop_dir(&dir_stack);
+      }
+      namebuf[0] = NUL;                 /* no match found, remove file name */
+      lnum = 0;                         /* don't jump to this line */
+      valid = FALSE;
+      STRCPY(errmsg, IObuff);           /* copy whole line to error message */
+      if (fmt_ptr == NULL)
+        multiline = multiignore = FALSE;
+    } else if (fmt_ptr != NULL) {
+      /* honor %> item */
+      if (fmt_ptr->conthere)
+        fmt_start = fmt_ptr;
+
+      if (vim_strchr((char_u *)"AEWI", idx) != NULL) {
+        multiline = TRUE;    /* start of a multi-line message */
+        multiignore = FALSE; /* reset continuation */
+      } else if (vim_strchr((char_u *)"CZ", idx)
+                 != NULL) { /* continuation of multi-line msg */
+        if (qfprev == NULL)
+          goto error2;
+        if (*errmsg && !multiignore) {
+          len = (int)STRLEN(qfprev->qf_text);
+          ptr = alloc((unsigned)(len + STRLEN(errmsg) + 2));
+          STRCPY(ptr, qfprev->qf_text);
+          free(qfprev->qf_text);
+          qfprev->qf_text = ptr;
+          *(ptr += len) = '\n';
+          STRCPY(++ptr, errmsg);
+        }
+        if (qfprev->qf_nr == -1)
+          qfprev->qf_nr = enr;
+        if (vim_isprintc(type) && !qfprev->qf_type)
+          qfprev->qf_type = type;            /* only printable chars allowed */
+        if (!qfprev->qf_lnum)
+          qfprev->qf_lnum = lnum;
+        if (!qfprev->qf_col)
+          qfprev->qf_col = col;
+        qfprev->qf_viscol = use_viscol;
+        if (!qfprev->qf_fnum)
+          qfprev->qf_fnum = qf_get_fnum(directory,
+              *namebuf || directory ? namebuf
+              : currfile && valid ? currfile : 0);
+        if (idx == 'Z')
+          multiline = multiignore = FALSE;
+        line_breakcheck();
+        continue;
+      } else if (vim_strchr((char_u *)"OPQ", idx) != NULL) {
+        /* global file names */
+        valid = FALSE;
+        if (*namebuf == NUL || os_file_exists(namebuf)) {
+          if (*namebuf && idx == 'P')
+            currfile = qf_push_dir(namebuf, &file_stack);
+          else if (idx == 'Q')
+            currfile = qf_pop_dir(&file_stack);
+          *namebuf = NUL;
+          if (tail && *tail) {
+            STRMOVE(IObuff, skipwhite(tail));
+            multiscan = TRUE;
+            goto restofline;
+          }
+        }
+      }
+      if (fmt_ptr->flags == '-') {      /* generally exclude this line */
+        if (multiline)
+          multiignore = TRUE;           /* also exclude continuation lines */
+        continue;
+      }
+    }
+
+    if (qf_add_entry(qi, &qfprev,
+            directory,
+            (*namebuf || directory)
+            ? namebuf
+            : ((currfile && valid) ? currfile : (char_u *)NULL),
+            0,
+            errmsg,
+            lnum,
+            col,
+            use_viscol,
+            pattern,
+            enr,
+            type,
+            valid) == FAIL)
+      goto error2;
+    line_breakcheck();
+  }
+  if (fd == NULL || !ferror(fd)) {
+    if (qi->qf_lists[qi->qf_curlist].qf_index == 0) {
+      /* no valid entry found */
+      qi->qf_lists[qi->qf_curlist].qf_ptr =
+        qi->qf_lists[qi->qf_curlist].qf_start;
+      qi->qf_lists[qi->qf_curlist].qf_index = 1;
+      qi->qf_lists[qi->qf_curlist].qf_nonevalid = TRUE;
+    } else {
+      qi->qf_lists[qi->qf_curlist].qf_nonevalid = FALSE;
+      if (qi->qf_lists[qi->qf_curlist].qf_ptr == NULL)
+        qi->qf_lists[qi->qf_curlist].qf_ptr =
+          qi->qf_lists[qi->qf_curlist].qf_start;
+    }
+    /* return number of matches */
+    retval = qi->qf_lists[qi->qf_curlist].qf_count;
+    goto qf_init_ok;
+  }
+  EMSG(_(e_readerrf));
+error2:
+  qf_free(qi, qi->qf_curlist);
+  qi->qf_listcount--;
+  if (qi->qf_curlist > 0)
+    --qi->qf_curlist;
+qf_init_ok:
+  if (fd != NULL)
+    fclose(fd);
+  for (fmt_ptr = fmt_first; fmt_ptr != NULL; fmt_ptr = fmt_first) {
+    fmt_first = fmt_ptr->next;
+    vim_regfree(fmt_ptr->prog);
+    free(fmt_ptr);
+  }
+  qf_clean_dir_stack(&dir_stack);
+  qf_clean_dir_stack(&file_stack);
+qf_init_end:
+  free(namebuf);
+  free(errmsg);
+  free(pattern);
+  free(fmtstr);
+
+  qf_update_buffer(qi);
+
+  return retval;
+}
+
+/*
+ * Prepare for adding a new quickfix list.
+ */
+static void qf_new_list(qf_info_T *qi, char_u *qf_title)
+{
+  int i;
+
+  /*
+   * If the current entry is not the last entry, delete entries below
+   * the current entry.  This makes it possible to browse in a tree-like
+   * way with ":grep'.
+   */
+  while (qi->qf_listcount > qi->qf_curlist + 1)
+    qf_free(qi, --qi->qf_listcount);
+
+  /*
+   * When the stack is full, remove to oldest entry
+   * Otherwise, add a new entry.
+   */
+  if (qi->qf_listcount == LISTCOUNT) {
+    qf_free(qi, 0);
+    for (i = 1; i < LISTCOUNT; ++i)
+      qi->qf_lists[i - 1] = qi->qf_lists[i];
+    qi->qf_curlist = LISTCOUNT - 1;
+  } else
+    qi->qf_curlist = qi->qf_listcount++;
+  memset(&qi->qf_lists[qi->qf_curlist], 0, (size_t)(sizeof(qf_list_T)));
+  if (qf_title != NULL) {
+    char_u *p = alloc((int)STRLEN(qf_title) + 2);
+
+    qi->qf_lists[qi->qf_curlist].qf_title = p;
+    sprintf((char *)p, ":%s", (char *)qf_title);
+  }
+}
+
+/*
+ * Free a location list
+ */
+static void ll_free_all(qf_info_T **pqi)
+{
+  int i;
+  qf_info_T   *qi;
+
+  qi = *pqi;
+  if (qi == NULL)
+    return;
+  *pqi = NULL;          /* Remove reference to this list */
+
+  qi->qf_refcount--;
+  if (qi->qf_refcount < 1) {
+    /* No references to this location list */
+    for (i = 0; i < qi->qf_listcount; ++i)
+      qf_free(qi, i);
+    free(qi);
+  }
+}
+
+void qf_free_all(win_T *wp)
+{
+  int i;
+  qf_info_T   *qi = &ql_info;
+
+  if (wp != NULL) {
+    /* location list */
+    ll_free_all(&wp->w_llist);
+    ll_free_all(&wp->w_llist_ref);
+  } else
+    /* quickfix list */
+    for (i = 0; i < qi->qf_listcount; ++i)
+      qf_free(qi, i);
+}
+
+/*
+ * Add an entry to the end of the list of errors.
+ * Returns OK or FAIL.
+ */
+static int 
+qf_add_entry (
+    qf_info_T *qi,                /* quickfix list */
+    qfline_T **prevp,            /* pointer to previously added entry or NULL */
+    char_u *dir,               /* optional directory name */
+    char_u *fname,             /* file name or NULL */
+    int bufnum,                     /* buffer number or zero */
+    char_u *mesg,              /* message */
+    long lnum,                      /* line number */
+    int col,                        /* column */
+    int vis_col,                    /* using visual column */
+    char_u *pattern,           /* search pattern */
+    int nr,                         /* error number */
+    int type,                       /* type character */
+    int valid                      /* valid entry */
+)
+{
+  qfline_T    *qfp;
+
+  qfp = (qfline_T *)alloc((unsigned)sizeof(qfline_T));
+
+  if (bufnum != 0)
+    qfp->qf_fnum = bufnum;
+  else
+    qfp->qf_fnum = qf_get_fnum(dir, fname);
+  if ((qfp->qf_text = vim_strsave(mesg)) == NULL) {
+    free(qfp);
+    return FAIL;
+  }
+  qfp->qf_lnum = lnum;
+  qfp->qf_col = col;
+  qfp->qf_viscol = vis_col;
+  if (pattern == NULL || *pattern == NUL)
+    qfp->qf_pattern = NULL;
+  else if ((qfp->qf_pattern = vim_strsave(pattern)) == NULL) {
+    free(qfp->qf_text);
+    free(qfp);
+    return FAIL;
+  }
+  qfp->qf_nr = nr;
+  if (type != 1 && !vim_isprintc(type))   /* only printable chars allowed */
+    type = 0;
+  qfp->qf_type = type;
+  qfp->qf_valid = valid;
+
+  if (qi->qf_lists[qi->qf_curlist].qf_count == 0) {
+    /* first element in the list */
+    qi->qf_lists[qi->qf_curlist].qf_start = qfp;
+    qfp->qf_prev = qfp;         /* first element points to itself */
+  } else {
+    qfp->qf_prev = *prevp;
+    (*prevp)->qf_next = qfp;
+  }
+  qfp->qf_next = qfp;   /* last element points to itself */
+  qfp->qf_cleared = FALSE;
+  *prevp = qfp;
+  ++qi->qf_lists[qi->qf_curlist].qf_count;
+  if (qi->qf_lists[qi->qf_curlist].qf_index == 0 && qfp->qf_valid) {
+    /* first valid entry */
+    qi->qf_lists[qi->qf_curlist].qf_index =
+      qi->qf_lists[qi->qf_curlist].qf_count;
+    qi->qf_lists[qi->qf_curlist].qf_ptr = qfp;
+  }
+
+  return OK;
+}
+
+/*
+ * Allocate a new location list
+ */
+static qf_info_T *ll_new_list(void)
+{
+  qf_info_T *qi = xcalloc(1, sizeof(qf_info_T));
+  qi->qf_refcount++;
+
+  return qi;
+}
+
+/*
+ * Return the location list for window 'wp'.
+ * If not present, allocate a location list
+ */
+static qf_info_T *ll_get_or_alloc_list(win_T *wp)
+{
+  if (IS_LL_WINDOW(wp))
+    /* For a location list window, use the referenced location list */
+    return wp->w_llist_ref;
+
+  /*
+   * For a non-location list window, w_llist_ref should not point to a
+   * location list.
+   */
+  ll_free_all(&wp->w_llist_ref);
+
+  if (wp->w_llist == NULL)
+    wp->w_llist = ll_new_list();            /* new location list */
+  return wp->w_llist;
+}
+
+/*
+ * Copy the location list from window "from" to window "to".
+ */
+void copy_loclist(win_T *from, win_T *to)
+{
+  qf_info_T   *qi;
+  int idx;
+  int i;
+
+  /*
+   * When copying from a location list window, copy the referenced
+   * location list. For other windows, copy the location list for
+   * that window.
+   */
+  if (IS_LL_WINDOW(from))
+    qi = from->w_llist_ref;
+  else