aft.c: Simplify print_list_item().

[paraslash.git] / string.c

diff --git a/string.c b/string.c
index 0d7e05e66c3f8c88cb4738ff72ad9047f63cc07c..8c97ccf75e22397fe3929e84340a05f00b43003c 100644 (file)
--- a/string.c
+++ b/string.c
@@ -63,7 +63,8 @@ __must_check __malloc void *para_malloc(size_t size)
        void *p = malloc(size);
 
        if (!p) {
-               PARA_EMERG_LOG("%s", "malloc failed, aborting\n");
+               PARA_EMERG_LOG("malloc failed (size = %zu),  aborting\n",
+                       size);
                exit(EXIT_FAILURE);
        }
        return p;
@@ -300,8 +301,8 @@ __must_check __malloc char *para_logname(void)
  */
 __must_check __malloc char *para_homedir(void)
 {
-       char *h = getenv("HOME");
-       return para_strdup(h? h : "/tmp");
+       struct passwd *pw = getpwuid(getuid());
+       return para_strdup(pw? pw->pw_dir : "/tmp");
 }
 
 /**
@@ -393,7 +394,17 @@ __malloc char *para_hostname(void)
        return para_strdup(u.nodename);
 }
 
-enum for_each_line_modes{LINE_MODE_RO, LINE_MODE_RW};
+/**
+ * Used to distinguish between read-only and read-write mode.
+ *
+ * \sa for_each_line(), for_each_line_ro().
+ */
+enum for_each_line_modes{
+       /** Activate read-only mode. */
+       LINE_MODE_RO,
+       /** Activate read-write mode. */
+       LINE_MODE_RW
+};
 
 static int for_each_complete_line(enum for_each_line_modes mode, char *buf,
                size_t size, line_handler_t *line_handler, void *private_data)
@@ -446,12 +457,12 @@ static int for_each_complete_line(enum for_each_line_modes mode, char *buf,
 }
 
 /**
- * call a custom function for each complete line
+ * Call a custom function for each complete line.
  *
- * \param buf the buffer containing data seperated by newlines
- * \param size the number of bytes in \a buf
- * \param line_handler the custom function
- * \param private_data pointer to data which is passed to \a line_handler
+ * \param buf The buffer containing data seperated by newlines.
+ * \param size The number of bytes in \a buf.
+ * \param line_handler The custom function.
+ * \param private_data Pointer passed to \a line_handler.
  *
  * If \p line_handler is \p NULL, the function returns the number of complete
  * lines in \p buf.  Otherwise, \p line_handler is called for each complete
@@ -465,7 +476,7 @@ static int for_each_complete_line(enum for_each_line_modes mode, char *buf,
  * of bytes not handled to \p line_handler on success, or the negative return
  * value of the \p line_handler on errors.
  *
- * \sa for_each_line_ro()
+ * \sa for_each_line_ro().
  */
 int for_each_line(char *buf, size_t size, line_handler_t *line_handler,
                void *private_data)
@@ -475,21 +486,19 @@ int for_each_line(char *buf, size_t size, line_handler_t *line_handler,
 }
 
 /**
- * call a custom function for each complete line
- *
- * \param buf same meaning as in \p for_each_line
- * \param size same meaning as in \p for_each_line
- * \param line_handler same meaning as in \p for_each_line
- * \param private_data same meaning as in \p for_each_line
+ * Call a custom function for each complete line.
  *
- * This function behaves like \p for_each_line() with the following differences:
+ * \param buf Same meaning as in \p for_each_line().
+ * \param size Same meaning as in \p for_each_line().
+ * \param line_handler Same meaning as in \p for_each_line().
+ * \param private_data Same meaning as in \p for_each_line().
  *
- * - buf is left unchanged
+ * This function behaves like \p for_each_line(), but \a buf is left unchanged.
  *
  * \return On success, the function returns the number of complete lines in \p
  * buf, otherwise the (negative) return value of \p line_handler is returned.
  *
- * \sa for_each_line()
+ * \sa for_each_line().
  */
 int for_each_line_ro(char *buf, size_t size, line_handler_t *line_handler,
                void *private_data)
@@ -548,3 +557,66 @@ __printf_2_3 int para_printf(struct para_buffer *b, const char *fmt, ...)
        }
        return ret;
 }
+
+/** \cond LLONG_MAX and LLONG_LIN might not be defined. */
+#ifndef LLONG_MAX
+#define LLONG_MAX (1 << (sizeof(long) - 1))
+#endif
+#ifndef LLONG_MIN
+#define LLONG_MIN (-LLONG_MAX - 1LL)
+#endif
+/** \endcond */
+
+/**
+ * Convert a string to a 64-bit signed integer value.
+ *
+ * \param str The string to be converted.
+ * \param value Result pointer.
+ *
+ * \return Positive on success, negative on errors.
+ *
+ * \sa para_atoi32(), strtol(3), atoi(3).
+ */
+int para_atoi64(const char *str, int64_t *value)
+{
+       char *endptr;
+       long long tmp;
+
+       errno = 0; /* To distinguish success/failure after call */
+       tmp = strtoll(str, &endptr, 10);
+       if (errno == ERANGE && (tmp == LLONG_MAX || tmp == LLONG_MIN))
+               return -E_ATOI_OVERFLOW;
+       if (errno != 0 && tmp == 0) /* other error */
+               return -E_STRTOLL;
+       if (endptr == str)
+               return -E_ATOI_NO_DIGITS;
+       if (*endptr != '\0') /* Further characters after number */
+               return -E_ATOI_JUNK_AT_END;
+       *value = tmp;
+       return 1;
+}
+
+/**
+ * Convert a string to a 32-bit signed integer value.
+ *
+ * \param str The string to be converted.
+ * \param value Result pointer.
+ *
+ * \return Positive on success, negative on errors.
+ *
+ * \sa para_atoi64().
+*/
+int para_atoi32(const char *str, int32_t *value)
+{
+       int64_t tmp;
+       int ret;
+       const int32_t max = 2147483647;
+
+       ret = para_atoi64(str, &tmp);
+       if (ret < 0)
+               return ret;
+       if (tmp > max || tmp < -max - 1)
+               return -E_ATOI_OVERFLOW;
+       *value = tmp;
+       return 1;
+}