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Load trailer dict.

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This commit is contained in:
Michael R Sweet 2021-05-04 12:24:29 -04:00
parent a5468b1b87
commit 516c6b9ace
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GPG Key ID: 999559A027815955
3 changed files with 66 additions and 6 deletions
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41
pdfio-file.c
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@ -453,9 +453,10 @@ static bool // O - `true` on success, `false` on failure
load_xref(pdfio_file_t *pdf, // I - PDF file
off_t xref_offset) // I - Offset to xref
{
bool done = false; // Are we done?
char line[1024], // Line from file
*ptr; // Pointer into line
bool done = false; // Are we done?
char line[1024], // Line from file
*ptr; // Pointer into line
_pdfio_value_t trailer; // Trailer dictionary
while (!done)
@ -496,7 +497,7 @@ load_xref(pdfio_file_t *pdf, // I - PDF file
// Read this group of objects...
for (; num_objects > 0; num_objects --, number ++)
{
intmax_t offset; // Offset in file
intmax_t offset; // Offset in file
int generation; // Generation number
pdfio_obj_t *obj; // Object
@ -558,8 +559,36 @@ load_xref(pdfio_file_t *pdf, // I - PDF file
return (false);
}
// TODO: Read trailer dict...
done = true;
if (!_pdfioValueRead(pdf, &trailer))
{
_pdfioFileError(pdf, "Unable to read trailer dictionary.");
return (false);
}
else
{
_pdfioFileError(pdf, "Trailer is not a dictionary.");
return (false);
}
if (!pdf->trailer)
{
// Save the trailer dictionary and grab the root (catalog) and info
// objects...
pdf->trailer = trailer.value.dict;
if ((pdf->root = pdfioDictGetObject(pdf->trailer, "Root")) == NULL)
{
_pdfioFileError(pdf, "Missing Root object.");
return (false);
}
pdf->info = pdfioDictGetObject(pdf->trailer, "Info");
pdf->encrypt = pdfioDictGetObject(pdf->trailer, "Encrypt");
pdf->id_array = pdfioDictGetArray(pdf->trailer, "ID");
}
if ((xref_offset = (off_t)pdfioDictGetNumber(pdf->trailer, "Prev")) <= 0)
done = true;
}
return (true);

2
pdfio-private.h
View File

@ -127,6 +127,8 @@ struct _pdfio_file_s // PDF file structure
pdfio_dict_t *trailer; // Trailer dictionary
pdfio_obj_t *root; // Root object/dictionary
pdfio_obj_t *info; // Information object/dictionary
pdfio_obj_t *encrypt; // Encryption object/dictionary
pdfio_array_t *id_array; // ID array
// Allocated data elements
size_t num_arrays, // Number of arrays

29
pdfio.xcodeproj/project.pbxproj
View File

@ -20,8 +20,19 @@
273440CD263D727800FBFD63 /* pdfio-page.c in Sources */ = {isa = PBXBuildFile; fileRef = 273440C2263D727800FBFD63 /* pdfio-page.c */; };
273440D8263D72E100FBFD63 /* testpdfio.c in Sources */ = {isa = PBXBuildFile; fileRef = 273440D7263D72E100FBFD63 /* testpdfio.c */; };
273440E4263DD7EA00FBFD63 /* pdfio-token.c in Sources */ = {isa = PBXBuildFile; fileRef = 273440E3263DD7EA00FBFD63 /* pdfio-token.c */; };
27ECBD8926419DAB0025312A /* libpdfio.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 273440B0263D6FE200FBFD63 /* libpdfio.a */; };
/* End PBXBuildFile section */
/* Begin PBXContainerItemProxy section */
27ECBD8626419DA40025312A /* PBXContainerItemProxy */ = {
isa = PBXContainerItemProxy;
containerPortal = 273440A8263D6FE200FBFD63 /* Project object */;
proxyType = 1;
remoteGlobalIDString = 273440AF263D6FE200FBFD63;
remoteInfo = pdfio;
};
/* End PBXContainerItemProxy section */
/* Begin PBXCopyFilesBuildPhase section */
273440D0263D72AE00FBFD63 /* CopyFiles */ = {
isa = PBXCopyFilesBuildPhase;
@ -73,6 +84,7 @@
isa = PBXFrameworksBuildPhase;
buildActionMask = 2147483647;
files = (
27ECBD8926419DAB0025312A /* libpdfio.a in Frameworks */,
);
runOnlyForDeploymentPostprocessing = 0;
};
@ -98,6 +110,7 @@
273440D7263D72E100FBFD63 /* testpdfio.c */,
273440D9263D72EF00FBFD63 /* Documentation */,
273440B1263D6FE200FBFD63 /* Products */,
27ECBD8826419DAB0025312A /* Frameworks */,
);
sourceTree = "<group>";
};
@ -125,6 +138,13 @@
name = Documentation;
sourceTree = "<group>";
};
27ECBD8826419DAB0025312A /* Frameworks */ = {
isa = PBXGroup;
children = (
);
name = Frameworks;
sourceTree = "<group>";
};
/* End PBXGroup section */
/* Begin PBXHeadersBuildPhase section */
@ -168,6 +188,7 @@
buildRules = (
);
dependencies = (
27ECBD8726419DA40025312A /* PBXTargetDependency */,
);
name = testpdfio;
productName = testpdfio;
@ -237,6 +258,14 @@
};
/* End PBXSourcesBuildPhase section */
/* Begin PBXTargetDependency section */
27ECBD8726419DA40025312A /* PBXTargetDependency */ = {
isa = PBXTargetDependency;
target = 273440AF263D6FE200FBFD63 /* pdfio */;
targetProxy = 27ECBD8626419DA40025312A /* PBXContainerItemProxy */;
};
/* End PBXTargetDependency section */
/* Begin XCBuildConfiguration section */
273440B2263D6FE200FBFD63 /* Debug */ = {
isa = XCBuildConfiguration;