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Diffstat (limited to 'gnu/usr.bin/cvs/lib/subr.c')
| -rw-r--r-- | gnu/usr.bin/cvs/lib/subr.c | 322 |
1 files changed, 0 insertions, 322 deletions
diff --git a/gnu/usr.bin/cvs/lib/subr.c b/gnu/usr.bin/cvs/lib/subr.c deleted file mode 100644 index 228581c5b1e0..000000000000 --- a/gnu/usr.bin/cvs/lib/subr.c +++ /dev/null @@ -1,322 +0,0 @@ -/* - * Copyright (c) 1992, Brian Berliner and Jeff Polk - * Copyright (c) 1989-1992, Brian Berliner - * - * You may distribute under the terms of the GNU General Public License as - * specified in the README file that comes with the CVS 1.4 kit. - * - * Various useful functions for the CVS support code. - */ - -#include "cvs.h" - -#ifndef lint -static const char rcsid[] = "$CVSid: @(#)subr.c 1.64 94/10/07 $"; -USE(rcsid); -#endif - -extern char *getlogin (); - -/* - * malloc some data and die if it fails - */ -char * -xmalloc (bytes) - size_t bytes; -{ - char *cp; - - /* Parts of CVS try to xmalloc zero bytes and then free it. Some - systems have a malloc which returns NULL for zero byte - allocations but a free which can't handle NULL, so compensate. */ - if (bytes == 0) - bytes = 1; - - cp = malloc (bytes); - if (cp == NULL) - error (1, 0, "can not allocate %lu bytes", (unsigned long) bytes); - return (cp); -} - -/* - * realloc data and die if it fails [I've always wanted to have "realloc" do - * a "malloc" if the argument is NULL, but you can't depend on it. Here, I - * can *force* it. - */ -char * -xrealloc (ptr, bytes) - char *ptr; - size_t bytes; -{ - char *cp; - - if (!ptr) - cp = malloc (bytes); - else - cp = realloc (ptr, bytes); - - if (cp == NULL) - error (1, 0, "can not reallocate %lu bytes", (unsigned long) bytes); - return (cp); -} - -/* - * Duplicate a string, calling xmalloc to allocate some dynamic space - */ -char * -xstrdup (str) - const char *str; -{ - char *s; - - if (str == NULL) - return ((char *) NULL); - s = xmalloc (strlen (str) + 1); - (void) strcpy (s, str); - return (s); -} - -/* Remove trailing newlines from STRING, destructively. */ -void -strip_trailing_newlines (str) - char *str; -{ - int len; - len = strlen (str) - 1; - - while (str[len] == '\n') - str[len--] = '\0'; -} - -/* - * Recover the space allocated by Find_Names() and line2argv() - */ -void -free_names (pargc, argv) - int *pargc; - char **argv; -{ - register int i; - - for (i = 0; i < *pargc; i++) - { /* only do through *pargc */ - free (argv[i]); - } - *pargc = 0; /* and set it to zero when done */ -} - -/* - * Convert a line into argc/argv components and return the result in the - * arguments as passed. Use free_names() to return the memory allocated here - * back to the free pool. - */ -void -line2argv (pargc, argv, line) - int *pargc; - char **argv; - char *line; -{ - char *cp; - - *pargc = 0; - for (cp = strtok (line, " \t"); cp; cp = strtok ((char *) NULL, " \t")) - { - argv[*pargc] = xstrdup (cp); - (*pargc)++; - } -} - -/* - * Returns the number of dots ('.') found in an RCS revision number - */ -int -numdots (s) - const char *s; -{ - int dots = 0; - - for (; *s; s++) - { - if (*s == '.') - dots++; - } - return (dots); -} - -/* - * Get the caller's login from his uid. If the real uid is "root" try LOGNAME - * USER or getlogin(). If getlogin() and getpwuid() both fail, return - * the uid as a string. - */ -char * -getcaller () -{ - static char uidname[20]; - struct passwd *pw; - char *name; - uid_t uid; - - uid = getuid (); - if (uid == (uid_t) 0) - { - /* super-user; try getlogin() to distinguish */ - if (((name = getlogin ()) || (name = getenv("LOGNAME")) || - (name = getenv("USER"))) && *name) - return (name); - } - if ((pw = (struct passwd *) getpwuid (uid)) == NULL) - { - (void) sprintf (uidname, "uid%lu", (unsigned long) uid); - return (uidname); - } - return (pw->pw_name); -} - -#ifdef lint -#ifndef __GNUC__ -/* ARGSUSED */ -time_t -get_date (date, now) - char *date; - struct timeb *now; -{ - time_t foo = 0; - - return (foo); -} -#endif -#endif - -/* Given two revisions, find their greatest common ancestor. If the - two input revisions exist, then rcs guarantees that the gca will - exist. */ - -char * -gca (rev1, rev2) - char *rev1; - char *rev2; -{ - int dots; - char gca[PATH_MAX]; - char *p[2]; - int j[2]; - - if (rev1 == NULL || rev2 == NULL) - { - error (0, 0, "sanity failure in gca"); - abort(); - } - - /* walk the strings, reading the common parts. */ - gca[0] = '\0'; - p[0] = rev1; - p[1] = rev2; - do - { - int i; - char c[2]; - char *s[2]; - - for (i = 0; i < 2; ++i) - { - /* swap out the dot */ - s[i] = strchr (p[i], '.'); - if (s[i] != NULL) { - c[i] = *s[i]; - } - - /* read an int */ - j[i] = atoi (p[i]); - - /* swap back the dot... */ - if (s[i] != NULL) { - *s[i] = c[i]; - p[i] = s[i] + 1; - } - else - { - /* or mark us at the end */ - p[i] = NULL; - } - - } - - /* use the lowest. */ - (void) sprintf (gca + strlen (gca), "%d.", - j[0] < j[1] ? j[0] : j[1]); - - } while (j[0] == j[1] - && p[0] != NULL - && p[1] != NULL); - - /* back up over that last dot. */ - gca[strlen(gca) - 1] = '\0'; - - /* numbers differ, or we ran out of strings. we're done with the - common parts. */ - - dots = numdots (gca); - if (dots == 0) - { - /* revisions differ in trunk major number. */ - - char *q; - char *s; - - s = (j[0] < j[1]) ? p[0] : p[1]; - - if (s == NULL) - { - /* we only got one number. this is strange. */ - error (0, 0, "bad revisions %s or %s", rev1, rev2); - abort(); - } - else - { - /* we have a minor number. use it. */ - q = gca + strlen (gca); - - *q++ = '.'; - for ( ; *s != '.' && *s != '\0'; ) - *q++ = *s++; - - *q = '\0'; - } - } - else if ((dots & 1) == 0) - { - /* if we have an even number of dots, then we have a branch. - remove the last number in order to make it a revision. */ - - char *s; - - s = strrchr(gca, '.'); - *s = '\0'; - } - - return (xstrdup (gca)); -} - -/* - * Sanity checks and any required fix-up on message passed to RCS via '-m'. - * RCS 5.7 requires that a non-total-whitespace, non-null message be provided - * with '-m'. - */ -char * -make_message_rcslegal (message) - char *message; -{ - if ((message == NULL) || (*message == '\0') || isspace (*message)) - { - char *t; - - if (message) - for (t = message; *t; t++) - if (!isspace (*t)) - return message; - - return "*** empty log message ***\n"; - } - - return message; -} |