Added svector_find() function.

[nmh] / sbr / utils.c

diff --git a/sbr/utils.c b/sbr/utils.c
index 2a7a1ccfb150ac67826d8b23abb0a953711f6209..7f0760a0aefa46430c0f96352454b36392e22b45 100644 (file)
--- a/sbr/utils.c
+++ b/sbr/utils.c
@@ -2,8 +2,6 @@
 /*
  * utils.c -- various utility routines
  *
 /*
  * utils.c -- various utility routines
  *

- * $Id$
- *

  * This code is Copyright (c) 2006, by the authors of nmh.  See the
  * COPYRIGHT file in the root directory of the nmh distribution for
  * complete copyright information.
  * This code is Copyright (c) 2006, by the authors of nmh.  See the
  * COPYRIGHT file in the root directory of the nmh distribution for
  * complete copyright information.


@@ -11,8 +9,13 @@
 
 #include <h/mh.h>
 #include <h/utils.h>
 
 #include <h/mh.h>
 #include <h/utils.h>

-#include <stdlib.h>
-#include <errno.h>
+#include <fcntl.h>
+
+/*
+ * We allocate space for messages (msgs array)
+ * this number of elements at a time.
+ */
+#define MAXMSGS 256

 
 /*
  * Safely call malloc
 
 /*
  * Safely call malloc


@@ -40,6 +43,10 @@ mh_xrealloc(void *ptr, size_t size)
 {
     void *memory;
 
 {
     void *memory;
 

+    /* Some non-POSIX realloc()s don't cope with realloc(NULL,sz) */
+    if (!ptr)
+        return mh_xmalloc(size);
+

     if (size == 0)
         adios(NULL, "Tried to realloc 0bytes");
 
     if (size == 0)
         adios(NULL, "Tried to realloc 0bytes");
 


@@ -85,7 +92,7 @@ pwd(void)
  *       -- malloc'ed memory.  Then free "s1".
  */
 char *
  *       -- malloc'ed memory.  Then free "s1".
  */
 char *

-add (char *s2, char *s1)
+add (const char *s2, char *s1)

 {
     char *cp;
     size_t len1 = 0, len2 = 0;
 {
     char *cp;
     size_t len1 = 0, len2 = 0;


@@ -113,12 +120,48 @@ add (char *s2, char *s1)
     return cp;
 }
 
     return cp;
 }
 

+/*
+ * addlist
+ *     Append an item to a comma separated list
+ */
+char *
+addlist (char *list, const char *item)
+{
+    if (list)
+       list = add (", ", list);
+
+    return add (item, list);
+}
+
+/*
+ * folder_exists
+ *      Check to see if a folder exists.
+ */
+int folder_exists(const char *folder)
+{
+    struct stat st;
+    int exists = 0;
+
+    if (stat (folder, &st) == -1) {
+        /* The folder either doesn't exist, or we hit an error.  Either way
+         * return a failure.
+         */
+        exists = 0;
+    } else {
+        /* We can see a folder with the right name */
+        exists = 1;
+    }
+
+    return exists;
+}
+
+

 /*
  * create_folder
  *      Check to see if a folder exists, if not, prompt the user to create
  *      it.
  */
 /*
  * create_folder
  *      Check to see if a folder exists, if not, prompt the user to create
  *      it.
  */

-void create_folder(char *folder, int autocreate, void (*done_callback)())
+void create_folder(char *folder, int autocreate, void (*done_callback)(int))

 {
     struct stat st;
     extern int errno;
 {
     struct stat st;
     extern int errno;


@@ -141,3 +184,136 @@ void create_folder(char *folder, int autocreate, void (*done_callback)())
             adios (NULL, "unable to create folder %s", folder);
     }
 }
             adios (NULL, "unable to create folder %s", folder);
     }
 }

+
+/*
+ * num_digits
+ *      Return the number of digits in a nonnegative integer.
+ */
+int
+num_digits (int n)
+{
+    int ndigits = 0;
+
+    /* Sanity check */
+    if (n < 0)
+        adios (NULL, "oops, num_digits called with negative value");
+
+    if (n == 0)
+        return 1;
+
+    while (n) {
+        n /= 10;
+        ndigits++;
+    }
+
+    return ndigits;
+}
+
+/*
+ * Append a message arg to an array of them, resizing it if necessary.
+ * Really a simple vector-of-(char *) maintenance routine.
+ */
+void
+app_msgarg(struct msgs_array *msgs, char *cp)
+{
+       if(msgs->size >= msgs->max) {
+               msgs->max += MAXMSGS;
+               msgs->msgs = mh_xrealloc(msgs->msgs,
+                       msgs->max * sizeof(*msgs->msgs));
+       }
+       msgs->msgs[msgs->size++] = cp;
+}
+
+/*
+ * Append a message number to an array of them, resizing it if necessary.
+ * Like app_msgarg, but with a vector-of-ints instead.
+ */
+
+void
+app_msgnum(struct msgnum_array *msgs, int msgnum)
+{
+       if (msgs->size >= msgs->max) {
+               msgs->max += MAXMSGS;
+               msgs->msgnums = mh_xrealloc(msgs->msgnums,
+                       msgs->max * sizeof(*msgs->msgnums));
+       }
+       msgs->msgnums[msgs->size++] = msgnum;
+}
+
+/* Open a form or components file */
+int
+open_form(char **form, char *def)
+{
+       int in;
+       if (*form) {
+               if ((in = open (etcpath (*form), O_RDONLY)) == NOTOK)
+                       adios (*form, "unable to open form file");
+       } else {
+               if ((in = open (etcpath (def), O_RDONLY)) == NOTOK)
+                       adios (def, "unable to open default components file");
+               *form = def;
+       }
+       return in;
+}
+
+
+/*
+ * Finds first occurrence of str in buf.  buf is not a C string but a
+ * byte array of length buflen.  str is a null-terminated C string.
+ * find_str() does not modify buf but passes back a non-const char *
+ * pointer so that the caller can modify it.
+ */
+char *
+find_str (const char buf[], size_t buflen, const char *str) {
+    const size_t len = strlen (str);
+    size_t i;
+
+    for (i = 0; i + len <= buflen; ++i, ++buf) {
+        if (! memcmp (buf, str, len)) return (char *) buf;
+    }
+
+    return NULL;
+}
+
+
+/*
+ * Finds last occurrence of str in buf.  buf is not a C string but a
+ * byte array of length buflen.  str is a null-terminated C string.
+ * find_str() does not modify buf but passes back a non-const char *
+ * pointer so that the caller can modify it.
+ */
+char *
+rfind_str (const char buf[], size_t buflen, const char *str) {
+    const size_t len = strlen (str);
+    size_t i;
+
+    for (i = 0, buf += buflen - len; i + len <= buflen; ++i, --buf) {
+        if (! memcmp (buf, str, len)) return (char *) buf;
+    }
+
+    return NULL;
+}
+
+
+/* POSIX doesn't have strcasestr() so emulate it. */
+char *
+nmh_strcasestr (const char *s1, const char *s2) {
+    const size_t len = strlen (s2);
+
+    if (isupper ((unsigned char) s2[0])  ||  islower ((unsigned char)s2[0])) {
+        char first[3];
+        first[0] = (char) toupper ((unsigned char) s2[0]);
+        first[1] = (char) tolower ((unsigned char) s2[0]);
+        first[2] = '\0';
+
+        for (s1 = strpbrk (s1, first); s1; s1 = strpbrk (++s1, first)) {
+            if (! strncasecmp (s1, s2, len)) return (char *) s1;
+        }
+    } else {
+        for (s1 = strchr (s1, s2[0]); s1; s1 = strchr (++s1, s2[0])) {
+            if (! strncasecmp (s1, s2, len)) return (char *) s1;
+        }
+    }
+
+    return NULL;
+}