2 ** utils.c -- various utility routines
4 ** This code is Copyright (c) 2006, by the authors of nmh. See the
5 ** COPYRIGHT file in the root directory of the nmh distribution for
6 ** complete copyright information.
19 ** We allocate space for messages (msgs array)
20 ** this number of elements at a time.
28 mh_xmalloc(size_t size)
33 adios(EX_SOFTWARE, NULL, "Tried to malloc 0 bytes");
35 memory = malloc(size);
37 adios(EX_OSERR, NULL, "Malloc failed");
43 ** Safely call realloc
46 mh_xrealloc(void *ptr, size_t size)
50 /* Some non-POSIX realloc()s don't cope with realloc(NULL,sz) */
52 return mh_xmalloc(size);
56 adios(EX_SOFTWARE, NULL, "Tried to realloc 0 bytes");
58 memory = realloc(ptr, size);
60 adios(EX_OSERR, NULL, "Realloc failed");
66 ** Return the present working directory, if the current directory does not
67 ** exist, or is too long, make / the pwd.
73 static char curwd[PATH_MAX];
75 if (!getcwd(curwd, PATH_MAX)) {
76 admonish(NULL, "unable to determine working directory");
77 if (!mypath || !*mypath ||
78 (strcpy(curwd, mypath), chdir(curwd)) == -1) {
85 if ((cp = curwd + strlen(curwd) - 1) > curwd && *cp == '/') {
86 /* strip trailing slash */
94 ** add -- If "s1" is NULL, this routine just creates a
95 ** -- copy of "s2" into newly malloc'ed memory.
96 ** -- (use getcpy() instead in this case)
98 ** -- If "s1" is not NULL, then copy the concatenation
99 ** -- of "s1" and "s2" (note the order) into newly
100 ** -- malloc'ed memory. Then free "s1".
103 add(char *s2, char *s1)
106 size_t len1 = 0, len2 = 0;
113 cp = mh_xmalloc(len1 + len2 + 1);
115 /* Copy s1 and free it */
117 memcpy(cp, s1, len1);
123 memcpy(cp + len1, s2, len2);
125 /* Now NULL terminate the string */
126 cp[len1 + len2] = '\0';
134 ** Check to see if a folder exists, if not, prompt the user to create it.
137 create_folder(char *folder, int autocreate, void (*done_callback)(int))
143 if (stat(folder, &st) == -1) {
145 adios(EX_IOERR, folder, "error on folder");
146 if (autocreate == 0) {
147 /* ask before creating folder */
148 cp = concat("Create folder \"", folder, "\"? ", NULL);
150 done_callback(EX_CANTCREAT);
152 } else if (autocreate == -1) {
153 /* do not create, so exit */
154 done_callback(EX_CANTCREAT);
156 if (!makedir(folder))
157 adios(EX_CANTCREAT, NULL, "unable to create folder %s", folder);
163 ** Return the number of digits in a nonnegative integer.
172 adios(EX_SOFTWARE, NULL, "oops, num_digits called with negative value");
186 ** Append a message arg to an array of them, resizing it if necessary.
187 ** The function is written to suit the arg parsing code it was extracted
188 ** from, and will probably be changed when the other code is cleaned up.
191 app_msgarg(struct msgs_array *msgs, char *cp)
193 if(msgs->size >= msgs->max)
194 msgs->msgs = mh_xrealloc(msgs->msgs,
195 (msgs->max+=MAXMSGS)*sizeof(*msgs->msgs));
196 msgs->msgs[msgs->size++] = cp;