/*
- * Copyright (C) 2004-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2004-2008 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
-/** \file string.c memory allocation and string handling functions */
+/** \file string.c Memory allocation and string handling functions. */
#include "para.h"
#include "string.h"
#include "error.h"
/**
- * paraslash's version of realloc()
+ * Paraslash's version of realloc().
*
- * \param p pointer to the memory block, may be NULL
- * \param size desired new size
+ * \param p Pointer to the memory block, may be \p NULL.
+ * \param size The desired new size.
*
* A wrapper for realloc(3). It calls \p exit(\p EXIT_FAILURE) on errors,
* i.e. there is no need to check the return value in the caller.
*
* \return A pointer to the newly allocated memory, which is suitably aligned
- * for any kind of variable and may be different from \p p.
+ * for any kind of variable and may be different from \a p.
*
- * \sa realloc(3)
+ * \sa realloc(3).
*/
__must_check __malloc void *para_realloc(void *p, size_t size)
{
}
/**
- * paraslash's version of malloc()
+ * Paraslash's version of malloc().
*
- * \param size desired new size
+ * \param size The desired new size.
*
* A wrapper for malloc(3) which exits on errors.
*
* \return A pointer to the allocated memory, which is suitably aligned for any
- * kind of variable.
+ * kind of variable.
*
- * \sa malloc(3)
+ * \sa malloc(3).
*/
__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;
}
/**
- * paraslash's version of calloc()
+ * Paraslash's version of calloc().
*
- * \param size desired new size
+ * \param size The desired new size.
*
* A wrapper for calloc(3) which exits on errors.
*
* \return A pointer to the allocated and zeroed-out memory, which is suitably
- * aligned for any kind of variable.
+ * aligned for any kind of variable.
*
* \sa calloc(3)
*/
}
/**
- * paraslash's version of strdup()
+ * Paraslash's version of strdup().
*
- * \param s string to be duplicated
+ * \param s The string to be duplicated.
*
* A wrapper for strdup(3). It calls \p exit(EXIT_FAILURE) on errors, i.e.
* there is no need to check the return value in the caller.
if ((ret = strdup(s? s: "")))
return ret;
- PARA_EMERG_LOG("%s", "strdup failed, aborting\n");
+ PARA_EMERG_LOG("strdup failed, aborting\n");
exit(EXIT_FAILURE);
}
/**
- * allocate a sufficiently large string and print into it
+ * Allocate a sufficiently large string and print into it.
*
- * \param fmt usual format string
+ * \param fmt A usual format string.
*
* Produce output according to \p fmt. No artificial bound on the length of the
* resulting string is imposed.
* \return This function either returns a pointer to a string that must be
* freed by the caller or aborts without returning.
*
- * \sa printf(3)
+ * \sa printf(3).
*/
__must_check __printf_1_2 __malloc char *make_message(const char *fmt, ...)
{
}
/**
- * paraslash's version of strcat()
+ * Paraslash's version of strcat().
*
- * \param a string to be appended to
- * \param b string to append
+ * \param a String to be appended to.
+ * \param b String to append.
*
* Append \p b to \p a.
*
- * \return If \p a is NULL, return a pointer to a copy of \p b, i.e.
- * para_strcat(NULL, b) is equivalent to para_strdup(b). If \p b is NULL,
- * return \p a without making a copy of \p a. Otherwise, construct the
- * concatenation \p c, free \p a (but not \p b) and return \p c.
+ * \return If \a a is \p NULL, return a pointer to a copy of \a b, i.e.
+ * para_strcat(NULL, b) is equivalent to para_strdup(b). If \a b is \p NULL,
+ * return \a a without making a copy of \a a. Otherwise, construct the
+ * concatenation \a c, free \a a (but not \a b) and return \a c.
*
* \sa strcat(3)
*/
}
/**
- * paraslash's version of dirname()
+ * Paraslash's version of dirname().
*
- * \param name pointer to the full path
+ * \param name Pointer to the full path.
*
- * Compute the directory component of \p name
+ * Compute the directory component of \p name.
*
- * \return If \p name is \รพ NULL or the empty string, return \p NULL.
- * Otherwise, Make a copy of \p name and return its directory component. Caller
+ * \return If \a name is \p NULL or the empty string, return \p NULL.
+ * Otherwise, Make a copy of \a name and return its directory component. Caller
* is responsible to free the result.
*/
__must_check __malloc char *para_dirname(const char *name)
}
/**
- * paraslash's version of basename()
+ * Paraslash's version of basename().
*
- * \param name Pointer to the full path
+ * \param name Pointer to the full path.
*
- * Compute the filename component of \p name
+ * Compute the filename component of \a name.
*
- * \return If \p name is \p NULL or the empty string, return \p NULL,
- * Otherwise, make a copy of \p name and return its filename component. Caller
- * is responsible to free the result.
+ * \return \p NULL if (a) \a name is the empty string or \p NULL, or (b) name
+ * ends with a slash. Otherwise, a pointer within \a name is returned. Caller
+ * must not free the result.
*/
-__must_check __malloc char *para_basename(const char *name)
+__must_check const char *para_basename(const char *name)
{
- char *p;
+ const char *ret;
if (!name || !*name)
return NULL;
- p = strrchr(name, '/');
- if (!p)
- return para_strdup(name);
- p++;
- if (!*p)
- return NULL;
- return para_strdup(p);
+ ret = strrchr(name, '/');
+ if (!ret)
+ return name;
+ ret++;
+ return ret;
}
/**
- * cut trailing newline
+ * Cut trailing newline.
*
- * \param buf the string to be chopped.
+ * \param buf The string to be chopped.
*
* Replace the last character in \p buf by zero if it is euqal to
* the newline character.
}
/**
- * get a random filename
+ * Get a random filename.
*
* This is by no means a secure way to create temporary files in a hostile
* direcory like \p /tmp. However, it is OK to use for temp files, fifos,
* sockets that are created in ~/.paraslash. Result must be freed by the
* caller.
*
- * \return a pointer to a random filename.
+ * \return A pointer to a random filename.
*/
__must_check __malloc char *para_tmpname(void)
{
}
/**
- * create unique temporary file
- *
- * \param template the template to be passed to mkstemp()
- * \param mode the desired mode of the tempfile
- *
- * This wrapper for mkstemp additionally uses fchmod() to
- * set the given mode of the tempfile if mkstemp() returned success.
- *
- * \return The file descriptor of the temp file just created on success.
- * On errors, -E_MKSTEMP or -E_FCHMOD is returned.
- */
-__must_check int para_mkstemp(char *template, mode_t mode)
-{
- int tmp, fd = mkstemp(template);
-
- if (fd < 0)
- return -E_MKSTEMP;
- tmp = fchmod(fd, mode);
- if (tmp >= 0)
- return fd;
- close(fd);
- unlink(template);
- return -E_FCHMOD;
-}
-
-/**
- * get the logname of the current user
+ * Get the logname of the current user.
*
* \return A dynammically allocated string that must be freed by the caller. On
* errors, the string "unknown user" is returned, i.e. this function never
- * returns NULL.
+ * returns \p NULL.
*
- * \sa getpwuid(3)
+ * \sa getpwuid(3).
*/
__must_check __malloc char *para_logname(void)
{
}
/**
- * get the home directory of the current user
+ * Get the home directory of the current user.
*
* \return A dynammically allocated string that must be freed by the caller. If
* the home directory could not be found, this function returns "/tmp".
}
/**
- * split string and return pointers to its parts.
+ * Split string and return pointers to its parts.
*
- * \param args the string to be split
- * \param argv_ptr pointer to the list of substrings
- * \param delim delimiter
+ * \param args The string to be split.
+ * \param argv_ptr Pointer to the list of substrings.
+ * \param delim Delimiter.
*
* This function modifies \a args by replacing each occurance of \a delim by
* zero. A \p NULL-terminated array of pointers to char* is allocated dynamically
* and these pointers are initialized to point to the broken-up substrings
- * within \a args. A pointer to this array is returned via \a argv_ptr. It's OK
- * to call this function with \a args \a == \p NULL.
+ * within \a args. A pointer to this array is returned via \a argv_ptr.
*
* \return The number of substrings found in \a args.
*/
}
/**
- * ensure that file descriptors 0, 1, and 2 are valid
+ * Ensure that file descriptors 0, 1, and 2 are valid.
*
* Common approach that opens /dev/null until it gets a file descriptor greater
* than two.
void valid_fd_012(void)
{
while (1) {
- int fd;
-
- fd = open("/dev/null", O_RDWR);
+ int fd = open("/dev/null", O_RDWR);
if (fd < 0)
exit(EXIT_FAILURE);
if (fd > 2) {
}
/**
- * get the own hostname
+ * Get the own hostname.
*
* \return A dynammically allocated string containing the hostname.
*
- * \sa uname(2)
+ * \sa uname(2).
*/
__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)
}
/**
- * 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
* 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)
}
/**
- * 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)
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.
+ * \return Standard.
*
* \sa para_atoi32(), strtol(3), atoi(3).
*/
* \param str The string to be converted.
* \param value Result pointer.
*
- * \return Positive on success, negative on errors.
+ * \return Standard.
*
* \sa para_atoi64().
*/
projects / paraslash.git / blobdiff