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Implement value/array/dict reading, refactor indirect references.

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This commit is contained in:
Michael R Sweet
2021-05-04 10:34:17 -04:00
parent e6a6ed708a
commit a5468b1b87
5 changed files with 291 additions and 19 deletions
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46
pdfio-common.c
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@@ -23,6 +23,22 @@ static ssize_t read_buffer(pdfio_file_t *pdf, char *buffer, size_t bytes);
static bool write_buffer(pdfio_file_t *pdf, const void *buffer, size_t bytes);
//
// '_pdfioFileClearTokens()' - Clear the token stack.
//
void
_pdfioFileClearTokens(pdfio_file_t *pdf)// I - PDF file
{
while (pdf->num_tokens > 0)
{
pdf->num_tokens --;
free(pdf->tokens[pdf->num_tokens]);
pdf->tokens[pdf->num_tokens] = NULL;
}
}
//
// '_pdfioFileConsume()' - Consume bytes from the file.
//
@@ -131,6 +147,20 @@ _pdfioFileGetToken(pdfio_file_t *pdf, // I - PDF file
char *buffer,// I - String buffer
size_t bufsize)// I - Size of string buffer
{
// See if we have a token waiting on the stack...
if (pdf->num_tokens > 0)
{
// Yes, return it...
pdf->num_tokens --;
strncpy(buffer, pdf->tokens[pdf->num_tokens], bufsize - 1);
buffer[bufsize - 1] = '\0';
free(pdf->tokens[pdf->num_tokens]);
pdf->tokens[pdf->num_tokens] = NULL;
return (true);
}
// No, read a new one...
return (_pdfioTokenRead(pdf, buffer, bufsize, (_pdfio_tpeek_cb_t)_pdfioFilePeek, (_pdfio_tconsume_cb_t)_pdfioFileConsume, pdf));
}
@@ -268,6 +298,22 @@ _pdfioFilePrintf(pdfio_file_t *pdf, // I - PDF file
}
//
// '()' - Push a token on the token stack.
//
void
_pdfioFilePushToken(pdfio_file_t *pdf, // I - PDF file
const char *token)// I - Token
{
if (pdf->num_tokens < (sizeof(pdf->tokens) / sizeof(pdf->tokens[0])))
{
if ((pdf->tokens[pdf->num_tokens ++] = strdup(token)) == NULL)
pdf->num_tokens --;
}
}
//
// '_pdfioFilePuts()' - Write a literal string to a PDF file.
//