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Added universal functions for creation of numbered filenames and date+time filenames (units with RTC only). Some size optimisations within code using these new functions. Everything should behave as before, except config saving will always find the highest file number + 1 even if the sequence is non-contiguous.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7449 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2005-09-02 01:15:35 +00:00
parent c7240cf844
commit 58e9412bff
4 changed files with 104 additions and 122 deletions
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113
apps/misc.c
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@ -89,7 +89,7 @@ char *output_dyn_value(char *buf, int buf_size, int value,
tbuf[i] = '\0';
talk_number(value, true);
if (strlen(tbuf))
if (tbuf[0] != 0)
{
talk_id(LANG_POINT, true);
talk_spell(tbuf, true);
@ -99,10 +99,78 @@ char *output_dyn_value(char *buf, int buf_size, int value,
return buf;
}
/* Create a filename with a number part in a way that the number is 1
higher than the highest numbered file matching the same pattern.
It is allowed that buffer and path point to the same memory location,
saving a strcpy(). Path must always be given without trailing slash,. */
char *create_numbered_filename(char *buffer, const char *path,
const char *prefix, const char *suffix,
int numberlen)
{
DIR *dir;
struct dirent *entry;
int max_num = 0;
int pathlen;
int prefixlen = strlen(prefix);
char fmtstring[12];
if (buffer != path)
strncpy(buffer, path, MAX_PATH);
pathlen = strlen(buffer);
dir = opendir(pathlen ? buffer : "/");
if (!dir)
return NULL;
while ((entry = readdir(dir)))
{
int curr_num;
if (strncasecmp(entry->d_name, prefix, prefixlen)
|| strcasecmp(entry->d_name + prefixlen + numberlen, suffix))
continue;
curr_num = atoi(entry->d_name + prefixlen);
if (curr_num > max_num)
max_num = curr_num;
}
closedir(dir);
snprintf(fmtstring, sizeof(fmtstring), "/%%s%%0%dd%%s", numberlen);
snprintf(buffer + pathlen, MAX_PATH - pathlen, fmtstring, prefix,
max_num + 1, suffix);
return buffer;
}
#ifdef HAVE_RTC
/* Create a filename with a date+time part.
It is allowed that buffer and path point to the same memory location,
saving a strcpy(). Path must always be given without trailing slash. */
char *create_datetime_filename(char *buffer, const char *path,
const char *prefix, const char *suffix)
{
struct tm *tm = get_time();
int pathlen;
if (buffer != path)
strncpy(buffer, path, MAX_PATH);
pathlen = strlen(buffer);
snprintf(buffer + pathlen, MAX_PATH - pathlen,
"/%s%02d%02d%02d-%02d%02d%02d%s", prefix,
tm->tm_year % 100, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec, suffix);
return buffer;
}
#endif /* HAVE_RTC */
/* Read (up to) a line of text from fd into buffer and return number of bytes
* read (which may be larger than the number of bytes stored in buffer). If
* an error occurs, -1 is returned (and buffer contains whatever could be
* read). A line is terminated by a LF char. Neither LF nor CR chars are
* an error occurs, -1 is returned (and buffer contains whatever could be
* read). A line is terminated by a LF char. Neither LF nor CR chars are
* stored in buffer.
*/
int read_line(int fd, char* buffer, int buffer_size)
@ -212,44 +280,9 @@ void screen_dump(void)
#endif
#ifdef HAVE_RTC
struct tm *tm = get_time();
snprintf(filename, MAX_PATH, "/dump %04d-%02d-%02d %02d-%02d-%02d.bmp",
tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
create_datetime_filename(filename, "", "dump ", ".bmp");
#else
{
DIR* dir;
int max_dump_file = 1; /* default to dump_0001.bmp */
dir = opendir("/");
if (dir) /* found */
{
/* Search for the highest screendump filename present,
increment behind that. So even with "holes"
(deleted files), the newest will always have the
highest number. */
while(true)
{
struct dirent* entry;
int curr_dump_file;
/* walk through the directory content */
entry = readdir(dir);
if (!entry)
{
closedir(dir);
break; /* end of dir */
}
if (strncasecmp(entry->d_name, "dump_", 5))
continue; /* no screendump file */
curr_dump_file = atoi(&entry->d_name[5]);
if (curr_dump_file >= max_dump_file)
max_dump_file = curr_dump_file + 1;
}
}
snprintf(filename, MAX_PATH,
"/dump_%04d.bmp", max_dump_file);
}
create_numbered_filename(filename, "", "dump_", ".bmp", 4);
#endif
fh = creat(filename, O_WRONLY);