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Implement date value support (Issue #13)

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This commit is contained in:
Michael R Sweet
2021-07-07 22:06:25 -04:00
parent 43b5e03c71
commit d62faa51e1
7 changed files with 1225 additions and 105 deletions
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80
pdfio-value.c
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@ -137,8 +137,17 @@ _pdfioValueDebug(_pdfio_value_t *v, // I - Value
fputs(v->value.boolean ? " true" : " false", fp);
break;
case PDFIO_VALTYPE_DATE :
// TODO: Implement date value support
fputs("(D:YYYYMMDDhhmmssZ)", fp);
{
struct tm dateval; // Date value
#ifdef _WIN32
gmtime_s(&dateval, &v->value.date);
#else
gmtime_r(&v->value.date, &dateval);
#endif // _WIN32
fprintf(fp, "(D:%04d%02d%02d%02d%02d%02dZ)", dateval.tm_year + 1900, dateval.tm_mon + 1, dateval.tm_mday, dateval.tm_hour, dateval.tm_min, dateval.tm_sec);
}
break;
case PDFIO_VALTYPE_DICT :
fputs("<<", fp);
@ -226,9 +235,73 @@ _pdfioValueRead(pdfio_file_t *pdf, // I - PDF file
if ((v->value.dict = _pdfioDictRead(pdf, tb)) == NULL)
return (NULL);
}
else if (!strncmp(token, "(D:", 3))
{
// Possible date value of the form:
//
// (D:YYYYMMDDhhmmssZ)
// (D:YYYYMMDDhhmmss+HH'mm)
// (D:YYYYMMDDhhmmss-HH'mm)
//
int i; // Looping var
struct tm dateval; // Date value
int offset; // Date offset
for (i = 3; i < 17; i ++)
{
if (!isdigit(token[i] & 255))
break;
}
if (i >= 17)
{
if (token[i] == 'Z')
{
i ++;
}
else if (token[i] == '-' || token[i] == '+')
{
if (isdigit(token[i + 1] & 255) && isdigit(token[i + 2] & 255) && token[i + 3] == '\'' && isdigit(token[i + 4] & 255) && isdigit(token[i + 5] & 255))
{
i += 6;
if (token[i] == '\'')
i ++;
}
}
}
if (token[i])
{
// Just a string...
v->type = PDFIO_VALTYPE_STRING;
v->value.string = pdfioStringCreate(pdf, token + 1);
}
else
{
// Date value...
dateval.tm_year = (token[3] - '0') * 1000 + (token[4] - '0') * 100 + (token[5] - '0') * 10 + token[6] - '0' - 1900;
dateval.tm_mon = (token[7] - '0') * 10 + token[8] - '0' - 1;
dateval.tm_mday = (token[9] - '0') * 10 + token[10] - '0';
dateval.tm_hour = (token[11] - '0') * 10 + token[12] - '0';
dateval.tm_min = (token[13] - '0') * 10 + token[14] - '0';
dateval.tm_sec = (token[15] - '0') * 10 + token[16] - '0';
if (token[17] == 'Z')
{
offset = 0;
}
else
{
offset = (token[18] - '0') * 600 + (token[19] - '0') * 60 + (token[20] - '0') * 10 + token[21] - '0';
if (token[17] == '-')
offset = -offset;
}
v->type = PDFIO_VALTYPE_DATE;
v->value.date = mktime(&dateval) + offset;
}
}
else if (token[0] == '(')
{
// TODO: Add date value support
// String
v->type = PDFIO_VALTYPE_STRING;
v->value.string = pdfioStringCreate(pdf, token + 1);
@ -413,6 +486,7 @@ _pdfioValueWrite(pdfio_file_t *pdf, // I - PDF file
#else
gmtime_r(&v->value.date, &date);
#endif // _WIN32
return (_pdfioFilePrintf(pdf, "(D:%04d%02d%02d%02d%02d%02dZ)", date.tm_year + 1900, date.tm_mon + 1, date.tm_mday, date.tm_hour, date.tm_min, date.tm_sec));
}