mhshow.man: more detail on use of -part and -type switches

[nmh] / sbr / utils.c

diff --git a/sbr/utils.c b/sbr/utils.c
index a279a327d16f70cf6b60e3500419d77362c4af97..c6f75e07379e3c47878359c7eb88c6a4485a945f 100644 (file)
--- a/sbr/utils.c
+++ b/sbr/utils.c
@@ -9,9 +9,14 @@
 
 #include <h/mh.h>
 #include <h/utils.h>
 
 #include <h/mh.h>
 #include <h/utils.h>

-#include <stdlib.h>

 #include <fcntl.h>
 #include <fcntl.h>

-#include <errno.h>
+
+/* sbr/signals.c */
+extern int setup_signal_handlers();
+
+/* sbr/m_mktemp.c */
+extern void remove_registered_files_atexit();
+

 
 /*
  * We allocate space for messages (msgs array)
 
 /*
  * We allocate space for messages (msgs array)


@@ -59,6 +64,24 @@ mh_xrealloc(void *ptr, size_t size)
     return memory;
 }
 
     return memory;
 }
 

+/*
+ * Safely call calloc
+ */
+void *
+mh_xcalloc(size_t nmemb, size_t size)
+{
+    void *memory;
+
+    if (nmemb == 0  ||  size == 0)
+        adios(NULL, "Tried to calloc 0 bytes");
+
+    if ((memory = calloc(nmemb, size))) {
+        return memory;
+    } else {
+        adios(NULL, "calloc failed");
+    }
+}
+

 /*
  * Return the present working directory, if the current directory does not
  * exist, or is too long, make / the pwd.
 /*
  * Return the present working directory, if the current directory does not
  * exist, or is too long, make / the pwd.


@@ -74,7 +97,9 @@ pwd(void)
         if (!mypath || !*mypath
                 || (strcpy (curwd, mypath), chdir (curwd)) == -1) {
             strcpy (curwd, "/");
         if (!mypath || !*mypath
                 || (strcpy (curwd, mypath), chdir (curwd)) == -1) {
             strcpy (curwd, "/");

-            chdir (curwd);
+            if (chdir (curwd) < 0) {
+                advise (curwd, "chdir");
+            }

         }
         return curwd;
     }
         }
         return curwd;
     }


@@ -94,7 +119,7 @@ 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;


@@ -127,7 +152,7 @@ add (char *s2, char *s1)
  *     Append an item to a comma separated list
  */
 char *
  *     Append an item to a comma separated list
  */
 char *

-addlist (char *list, char *item)
+addlist (char *list, const char *item)

 {
     if (list)
        list = add (", ", list);
 {
     if (list)
        list = add (", ", list);


@@ -139,7 +164,7 @@ addlist (char *list, char *item)
  * folder_exists
  *      Check to see if a folder exists.
  */
  * folder_exists
  *      Check to see if a folder exists.
  */

-int folder_exists(char *folder)
+int folder_exists(const char *folder)

 {
     struct stat st;
     int exists = 0;
 {
     struct stat st;
     int exists = 0;


@@ -226,6 +251,22 @@ app_msgarg(struct msgs_array *msgs, char *cp)
        msgs->msgs[msgs->size++] = cp;
 }
 
        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)
 /* Open a form or components file */
 int
 open_form(char **form, char *def)


@@ -241,3 +282,130 @@ open_form(char **form, char *def)
        }
        return in;
 }
        }
        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;
+}
+
+
+int
+nmh_init(const char *argv0, int read_context) {
+    if (! setlocale(LC_ALL, "")) {
+        admonish(NULL, "setlocale failed, check your LC_ALL, LC_CTYPE, and "
+                 "LANG environment variables");
+    }
+
+    invo_name = r1bindex ((char *) argv0, '/');
+
+    if (setup_signal_handlers()) {
+        admonish("sigaction", "unable to set up signal handlers");
+    }
+
+    /* POSIX atexit() does not define any error conditions. */
+    if (atexit(remove_registered_files_atexit)) {
+        admonish("atexit", "unable to register atexit function");
+    }
+
+    if (read_context) {
+        context_read();
+        return OK;
+    } else {
+        int status = context_foil(NULL);
+        if (status != OK) {
+            advise("", "failed to create minimal profile/conext");
+        }
+        return status;
+    }
+}
+
+
+/* Returns copy of argument str with all characters converted to upper
+   case, and trimmed whitespace (see cpytrim()) . */
+char *
+upcase (const char *str) {
+    char *up = cpytrim (str);
+    char *cp;
+
+    for (cp = up; *cp; ++cp) { *cp = toupper ((unsigned char) *cp); }
+
+    return up;
+}
+
+
+/*
+ * Scan for any 8-bit characters.  Return 1 if they exist.
+ *
+ * Scan up until the given endpoint (but not the actual endpoint itself).
+ * If the endpoint is NULL, scan until a '\0' is reached.
+ */
+
+int
+contains8bit(const char *start, const char *end)
+{
+    if (! start)
+       return 0;
+
+    while (*start != '\0' && (!end || (start < end)))
+       if (! isascii((unsigned char) *start++))
+           return 1;
+
+    return 0;
+}