dany/pdfio
1
0
Fork 0
mirror of https://github.com/michaelrsweet/pdfio.git synced 2025-08-29 07:12:02 +02:00
Code Issues Packages Projects Releases Wiki Activity

Update date/time parsing (Issue #115)

Browse Source
This commit is contained in:
Michael R Sweet
2025-04-04 19:12:16 -04:00
parent b8ea9ea064
commit 8cca645835
4 changed files with 241 additions and 76 deletions
Download Patch File Download Diff File Expand all files Collapse all files

90
pdfio-value.c
View File

@@ -351,7 +351,7 @@ _pdfioValueRead(pdfio_file_t *pdf, // I - PDF file
if ((v->value.dict = _pdfioDictRead(pdf, obj, tb, depth + 1)) == NULL)
return (NULL);
}
else if (!strncmp(token, "(D:", 3) && (timeval = get_date_time(token + 1)) != 0)
else if ((timeval = get_date_time(token + 1)) != 0)
{
v->type = PDFIO_VALTYPE_DATE;
v->value.date = timeval;
@@ -707,31 +707,59 @@ _pdfioValueWrite(pdfio_file_t *pdf, // I - PDF file
// 'get_date_time()' - Convert PDF date/time value to time_t.
//
static time_t // O - Time in seconds
static time_t // O - Time in seconds or `0` for none
get_date_time(const char *s) // I - PDF date/time value
{
int i; // Looping var
struct tm dateval; // Date value
int offset; // Date offset
int offset = 0; // Date offset in seconds
time_t t; // Time value
PDFIO_DEBUG("get_date_time(s=\"%s\")\n", s);
// Possible date value of the form:
//
// (D:YYYYMMDDhhmmssZ)
// (D:YYYYMMDDhhmmss+HH'mm)
// (D:YYYYMMDDhhmmss-HH'mm)
// D:YYYYMMDDhhmmssZ
// D:YYYYMMDDhhmmss+HH'mm
// D:YYYYMMDDhhmmss-HH'mm
//
if (strncmp(s, "D:", 2))
return (0);
for (i = 2; i < 16; i ++)
{
// Look for date/time digits...
if (!isdigit(s[i] & 255) || !s[i])
break;
}
if (i >= 16)
if (i < 6 || (i & 1))
{
// Short year or missing digit...
return (0);
}
memset(&dateval, 0, sizeof(dateval));
dateval.tm_year = (s[2] - '0') * 1000 + (s[3] - '0') * 100 + (s[4] - '0') * 10 + s[5] - '0' - 1900;
if (i > 6)
dateval.tm_mon = (s[6] - '0') * 10 + s[7] - '0' - 1;
if (i > 8)
dateval.tm_mday = (s[8] - '0') * 10 + s[9] - '0';
else
dateval.tm_mday = 1;
if (i > 10)
dateval.tm_hour = (s[10] - '0') * 10 + s[11] - '0';
if (i > 12)
dateval.tm_min = (s[12] - '0') * 10 + s[13] - '0';
if (i > 14)
dateval.tm_sec = (s[14] - '0') * 10 + s[15] - '0';
if (i >= 16 && s[i])
{
// Get zone info...
if (s[i] == 'Z')
{
// UTC...
@@ -742,14 +770,20 @@ get_date_time(const char *s) // I - PDF date/time value
// Timezone offset from UTC...
if (isdigit(s[i + 1] & 255) && isdigit(s[i + 2] & 255) && s[i + 3] == '\'' && isdigit(s[i + 4] & 255) && isdigit(s[i + 5] & 255))
{
offset = (s[i + 1] - '0') * 36000 + (s[i + 2] - '0') * 3600 + (s[i + 4] - '0') * 600 + (s[i + 5] - '0') * 60;
if (s[i] == '-')
offset = -offset;
i += 6;
// Accept trailing quote, per PDF spec...
if (s[i] == '\'')
i ++;
}
}
else if (!s[i])
else
{
// Missing zone info, invalid date string...
// Random zone info, invalid date string...
return (0);
}
}
@@ -760,26 +794,24 @@ get_date_time(const char *s) // I - PDF date/time value
return (0);
}
// Date value...
memset(&dateval, 0, sizeof(dateval));
// Convert date value to time_t...
#if _WIN32
if ((t = _mkgmtime(&dateval)) < 0)
return (0);
#elif defined(HAVE_TIMEGM)
if ((t = timegm(&dateval)) < 0)
return (0);
#else
if ((t = mktime(&dateval)) < 0)
return (0);
dateval.tm_year = (s[2] - '0') * 1000 + (s[3] - '0') * 100 + (s[4] - '0') * 10 + s[5] - '0' - 1900;
dateval.tm_mon = (s[6] - '0') * 10 + s[7] - '0' - 1;
dateval.tm_mday = (s[8] - '0') * 10 + s[9] - '0';
dateval.tm_hour = (s[10] - '0') * 10 + s[11] - '0';
dateval.tm_min = (s[12] - '0') * 10 + s[13] - '0';
dateval.tm_sec = (s[14] - '0') * 10 + s[15] - '0';
# if defined(HAVE_TM_GMTOFF)
localtime_r(&t, &dateval);
t -= dateval.tm_gmtoff;
# else
t -= timezone;
# endif // HAVE_TM_GMTOFF
#endif // _WIN32
if (s[16] == 'Z')
{
offset = 0;
}
else
{
offset = (s[17] - '0') * 600 + (s[18] - '0') * 60 + (s[19] - '0') * 10 + s[20] - '0';
if (s[16] == '-')
offset = -offset;
}
return (mktime(&dateval) + offset);
return (t + offset);
}