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141 lines
3.3 KiB
C
141 lines
3.3 KiB
C
//
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// PDF value functions for pdfio.
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//
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// Copyright © 2021 by Michael R Sweet.
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//
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// Licensed under Apache License v2.0. See the file "LICENSE" for more
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// information.
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//
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//
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// Include necessary headers...
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//
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#include "pdfio-private.h"
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//
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// '_pdfioValueCopy()' - Copy a value to a PDF file.
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//
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_pdfio_value_t *
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_pdfioValueCopy(pdfio_file_t *pdfdst, // I - Destination PDF file
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_pdfio_value_t *vdst, // I - Destination value
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pdfio_file_t *pdfsrc, // I - Source PDF file
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_pdfio_value_t *vsrc) // I - Source value
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{
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// TODO: Implement me
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(void)pdfdst;
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(void)vdst;
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(void)pdfsrc;
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(void)vsrc;
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return (NULL);
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}
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//
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// '_pdfioValueDelete()' - Free the memory used by a value.
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//
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void
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_pdfioValueDelete(_pdfio_value_t *v) // I - Value
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{
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// TODO: Implement me
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(void)v;
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}
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//
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// '_pdfioValueWrite()' - Write a value to a PDF file.
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//
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bool // O - `true` on success, `false` on failure
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_pdfioValueWrite(pdfio_file_t *pdf, // I - PDF file
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_pdfio_value_t *v) // I - Value
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{
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switch (v->type)
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{
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default :
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return (false);
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case PDFIO_VALTYPE_ARRAY :
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return (_pdfioArrayWrite(v->value.array));
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case PDFIO_VALTYPE_BINARY :
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// TODO: Implement binary value support
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return (false);
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case PDFIO_VALTYPE_BOOLEAN :
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if (v->value.boolean)
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return (_pdfioFilePuts(pdf, " true"));
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else
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return (_pdfioFilePuts(pdf, " false"));
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case PDFIO_VALTYPE_DATE :
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// TODO: Implement date value support
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break;
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case PDFIO_VALTYPE_DICT :
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return (_pdfioDictWrite(v->value.dict, NULL));
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case PDFIO_VALTYPE_INDIRECT :
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return (_pdfioFilePrintf(pdf, " %lu %lu obj", (unsigned long)v->value.obj->number, (unsigned long)v->value.obj->generation));
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case PDFIO_VALTYPE_NAME :
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return (_pdfioFilePrintf(pdf, "/%s", v->value.name));
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case PDFIO_VALTYPE_NULL :
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return (_pdfioFilePuts(pdf, " null"));
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case PDFIO_VALTYPE_NUMBER :
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return (_pdfioFilePrintf(pdf, " %g", v->value.number));
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case PDFIO_VALTYPE_STRING :
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{
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const char *start, // Start of fragment
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*end; // End of fragment
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if (!_pdfioFilePuts(pdf, "("))
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return (false);
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// Write a quoted string value...
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for (start = v->value.string; *start; start = end)
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{
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// Find the next character that needs to be quoted...
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for (end = start; *end; end ++)
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{
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if (*end == '\\' || *end == ')' || (*end & 255) < ' ')
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break;
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}
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if (end > start)
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{
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// Write unquoted (safe) characters...
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if (!_pdfioFileWrite(pdf, start, (size_t)(end - start)))
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return (false);
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}
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if (*end)
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{
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// Quote this character...
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bool success; // Did the write work?
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if (*end == '\\' || *end == ')')
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success = _pdfioFilePrintf(pdf, "\\%c", *end);
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else
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success = _pdfioFilePrintf(pdf, "\\%03o", *end);
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if (!success)
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return (false);
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end ++;
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}
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}
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return (_pdfioFilePuts(pdf, ")"));
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}
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}
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return (false);
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}
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