diplodocus.org Git - nmh/blob - h/utils.h

   1
   2 /*
   3  * utils.h -- utility prototypes
   4  */
   5
   6 /* Call malloc(3), exiting on NULL return. */
   7 void *mh_xmalloc(size_t size);
   8
   9 /* Call realloc(3), exiting on NULL return. */
  10 void *mh_xrealloc(void *ptr, size_t size);
  11
  12 /* Call calloc(3), exiting on NULL return. */
  13 void *mh_xcalloc(size_t nelem, size_t elsize);
  14
  15 /* Call free(3), if ptr isn't NULL. */
  16 void mh_xfree(void *ptr);
  17
  18 /* Set p to point to newly allocated, uninitialised, memory. */
  19 #define NEW(p) ((p) = mh_xmalloc(sizeof *(p)))
  20
  21 /* Set p to point to newly allocated, zeroed, memory. */
  22 #define NEW0(p) ((p) = mh_xcalloc(1, sizeof *(p)))
  23
  24 char *pwd(void);
  25 char *add(const char *, char *);
  26 char *addlist(char *, const char *);
  27 int folder_exists(const char *);
  28 void create_folder(char *, int, void (*)(int));
  29 int num_digits(int);
  30
  31 /*
  32  * A vector of char array, used to hold a list of string message numbers
  33  * or command arguments.
  34  */
  35
  36 struct msgs_array {
  37         int max, size;
  38         char **msgs;
  39 };
  40
  41 /*
  42  * Same as msgs_array, but for a vector of ints
  43  */
  44
  45 struct msgnum_array {
  46         int max, size;
  47         int *msgnums;
  48 };
  49
  50 /*
  51  * Add a argument to the given msgs_array or msgnum_array structure; extend
  52  * the array size if necessary
  53  */
  54
  55 void app_msgarg(struct msgs_array *, char *);
  56 void app_msgnum(struct msgnum_array *, int);
  57
  58 int open_form(char **, char *);
  59 char *find_str (const char [], size_t, const char *);
  60 char *rfind_str (const char [], size_t, const char *);
  61 char *nmh_strcasestr (const char *, const char *);
  62
  63 /*
  64  * See if a string contains 8 bit characters (use isascii() for the test).
  65  * Arguments include:
  66  *
  67  * start        - Pointer to start of string to test.
  68  * end          - End of string to test (test will stop before reaching
  69  *                this point).  If NULL, continue until reaching '\0'.
  70  *
  71  * This function always stops at '\0' regardless of the value of 'end'.
  72  * Returns 1 if the string contains an 8-bit character, 0 if it does not.
  73  */
  74 int contains8bit(const char *start, const char *end);
  75
  76 /*
  77  * See if file has any 8-bit bytes.
  78  * Arguments include:
  79  *
  80  * fd           - file descriptor
  81  * eightbit     - address of result, will be set to 1 if the file contains
  82  *                any 8-bit bytes, 0 otherwise.
  83  *
  84  * Returns OK on success, NOTOK on read failure.
  85  *
  86  */
  87 int scan_input (int fd, int *eightbit);
  88
  89
  90 /*
  91  * Compares prior version of nmh with current version.  Returns 1
  92  * if they compare the be the same, 0 if not.
  93  *
  94  * older        - 0 for difference comparison, 1 for only if older
  95  */
  96 int nmh_version_changed (int older);