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Add string array, have the pdfio_file_t object manage allocated data.

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Michael R Sweet 2021-04-25 11:28:56 -04:00
parent 899feb15c7
commit 98c48e66c2
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GPG Key ID: 999559A027815955
5 changed files with 268 additions and 29 deletions
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1
Makefile
View File

@ -44,6 +44,7 @@ LIBOBJS = \
pdfio-object.o \
pdfio-page.o \
pdfio-stream.o \
pdfio-string.o \
pdfio-value.o
OBJS = \
$(LIBOBJS) \

69
pdfio-array.c
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@ -15,11 +15,40 @@
//
// '()' - .
// Array structure
//
bool pdfioArrayAppendArray(pdfio_array_t *a, pdfio_array_t *value)
struct _pdfio_array_s
{
size_t num_values, // Number of values in use
alloc_values; // Number of allocated values
_pdfio_value_t *values; // Array of values
};
//
// Local functions...
//
static bool append_value(pdfio_array_t *a, _pdfio_value_t *v);
//
// 'pdfioArrayAppendArray()' - Add an array value to an array.
//
bool // O - `true` on success, `false` on failure
pdfioArrayAppendArray(
pdfio_array_t *a, // I - Array
pdfio_array_t *value) // I - Value
{
_pdfio_value_t v; // Value for array
v.type = PDFIO_VALTYPE_ARRAY;
v.value.array = value;
return (append_value(a, &v));
}
@ -176,3 +205,39 @@ pdfio_valtype_t pdfioArrayGetType(pdfio_array_t *a, int n)
}
//
// '()' - .
//
_pdfio_value_t *
_pdfioArrayGetValue(pdfio_array_t *a, int n)
{
}
//
// 'append_value()' - Append a value.
//
static bool // O - `true` on success, `false` otherwise
append_value(pdfio_array_t *a, // I - Array
_pdfio_value_t *v) // I - Value
{
if (!a)
return (false);
if (a->num_values >= a->alloc_values)
{
_pdfio_value_t *temp = (_pdfio_value_t *)realloc(a->values, (a->alloc_values + 16) * sizeof(_pdfio_value_t));
if (!temp)
return (false);
a->values = temp;
a->alloc_values += 16;
}
a->values[a->num_values ++] = *v;
return (true);
}

47
pdfio-private.h
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@ -15,6 +15,11 @@
//
# include "pdfio.h"
# include <stdarg.h>
# include <fcntl.h>
# include <unistd.h>
# include <string.h>
# include <ctype.h>
//
@ -49,6 +54,34 @@
// Types and constants...
//
struct _pdfio_file_s // PDF file structure
{
int fd; // File descriptor
// Allocated data elements
size_t num_arrays, // Number of arrays
alloc_arrays; // Allocated arrays
pdfio_array_t **arrays; // Arrays
size_t num_dicts, // Number of dictionaries
alloc_dicts; // Allocated dictionaries
pdfio_dict_t **dicts; // Dictionaries
size_t num_objs, // Number of objects
alloc_objs; // Allocated objects
pdfio_obj_t **objs; // Objects
size_t num_strings, // Number of strings
alloc_strings; // Allocated strings
char **strings; // Nul-terminated strings
};
struct _pdfio_obj_s // Object
{
int number, // Number
generation; // Generation
off_t offset; // Offset in file
size_t length; // Length
pdfio_dict_t *dict; // Dictionary
};
typedef struct _pdfio_value_s // Value structure
{
pdfio_valtype_t type; // Type of value
@ -70,12 +103,14 @@ typedef struct _pdfio_value_s // Value structure
// Functions...
//
extern void _pdfioArrayDelete(pdfio_array_t *a) PDFIO_INTERNAL;
extern void _pdfioDictDelete(pdfio_dict_t *dict) PDFIO_INTERNAL;
extern void _pdfioFileDelete(pdfio_file_t *file) PDFIO_INTERNAL;
extern void _pdfioObjDelete(pdfio_object_t *obj) PDFIO_INTERNAL;
extern void _pdfioStreamDelete(pdfio_stream_t *obj) PDFIO_INTERNAL;
extern void _pdfioValueDelete(pdfio_value_t *v) PDFIO_INTERNAL;
extern void _pdfioArrayDelete(pdfio_array_t *a) PDFIO_INTERNAL;
extern _pdfio_value_t *_pdfioArrayGetValue(pdfio_array_t *a, size_t n) PDFIO_INTERNAL;
extern void _pdfioDictDelete(pdfio_dict_t *dict) PDFIO_INTERNAL;
extern void _pdfioFileDelete(pdfio_file_t *file) PDFIO_INTERNAL;
extern void _pdfioObjDelete(pdfio_obj_t *obj) PDFIO_INTERNAL;
extern void _pdfioStreamDelete(pdfio_stream_t *obj) PDFIO_INTERNAL;
extern bool _pdfioStringIsAllocated(pdfio_file_t *pdf, const char *s) PDFIO_INTERNAL;
extern void _pdfioValueDelete(_pdfio_value_t *v) PDFIO_INTERNAL;
#endif // !PDFIO_PRIVATE_H

132
pdfio-string.c Normal file
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@ -0,0 +1,132 @@
//
// PDF dictionary functions for pdfio.
//
// Copyright © 2021 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
//
// Include necessary headers...
//
#include "pdfio-private.h"
//
// Local functions...
//
static int compare_strings(char **a, char **b);
//
// 'pdfioStringCreate()' - Create a literal string.
//
// This function creates a literal string associated with the PDF file
// "pwg". The "s" string points to a nul-terminated C string.
//
// `NULL` is returned on error, otherwise a `char *` that is valid until
// `pdfioFileClose` is called.
//
char * // O - New string or `NULL` on error
pdfioStringCreate(
pdfio_file_t *pdf, // I - PDF file
const char *s) // I - Nul-terminated string
{
char *news; // New string
// Range check input...
if (!pdf || !s)
return (NULL);
// See if the string has already been added...
if (pdf->num_strings > 0 && (news = (char *)bsearch(&s, pdf->strings, pdf->num_strings, sizeof(char *), (int (*)(const void *, const void *))compare_strings)) != NULL)
return (news);
// Not already added, so add it...
if ((news = strdup(s)) == NULL)
return (NULL);
if (pdf->num_strings >= pdf->alloc_strings)
{
// Expand the string array...
char **temp = realloc(pdf->strings, (pdf->alloc_strings + 32) * sizeof(char *));
if (!temp)
return (NULL);
pdf->strings = temp;
pdf->alloc_strings += 32;
}
// TODO: Change to insertion sort as needed...
pdf->strings[pdf->num_strings ++] = news;
if (pdf->num_strings > 1)
qsort(pdf->strings, pdf->num_strings, sizeof(char *), (int (*)(const void *, const void *))compare_strings);
return (news);
}
//
// 'pdfioStringCreatef()' - Create a formatted string.
//
// This function creates a formatted string associated with the PDF file
// "pwg". The "format" string contains `printf`-style format characters.
//
// `NULL` is returned on error, otherwise a `char *` that is valid until
// `pdfioFileClose` is called.
//
char * // O - New string or `NULL` on error
pdfioStringCreatef(
pdfio_file_t *pdf, // I - PDF file
const char *format, // I - `printf`-style format string
...) // I - Additional args as needed
{
char buffer[8192]; // String buffer
va_list ap; // Argument list
// Range check input...
if (!pdf || !format)
return (NULL);
// Format the string...
va_start(ap, format);
vsnprintf(buffer, sizeof(buffer), format, ap);
va_end(ap);
// Create the string from the buffer...
return (pdfioStringCreate(pdf, buffer));
}
//
// '()' - Check whether a string has been allocated.
//
bool // O - `true` if allocated, `false` otherwise
_pdfioStringIsAllocated(
pdfio_file_t *pdf, // I - PDF file
const char *s) // I - String
{
return (pdf->num_strings > 0 && bsearch(&s, pdf->strings, pdf->num_strings, sizeof(char *), (int (*)(const void *, const void *))compare_strings) != NULL);
}
//
// 'compare_strings()' - Compare two strings.
//
static int // O - Result of comparison
compare_strings(char **a, // I - First string
char **b) // I - Second string
{
return (strcmp(*a, *b));
}

48
pdfio.h
View File

@ -14,7 +14,10 @@
// Include necessary headers...
//
# include <stdio.h>
# include <stdlib.h>
# include <stdbool.h>
# include <sys/types.h>
# include <time.h>
@ -53,10 +56,10 @@ typedef enum pdfio_compress_e // Types of compression to use when writing strea
} pdfio_compress_t;
typedef struct _pdfio_dict_s pdfio_dict_t;
// Key/value dictionary
typedef bool (pdfio_error_cb_t)(pdfio_t *pdf, const char *message, void *data);
// Error callback
typedef struct _pdfio_file_s pdfio_file_t;
// PDF file
typedef bool (pdfio_error_cb_t)(pdfio_file_t *pdf, const char *message, void *data);
// Error callback
typedef struct _pdfio_obj_s pdfio_obj_t;// Numbered object in PDF file
typedef struct pdfio_rect_s // PDF rectangle
{
@ -89,22 +92,22 @@ typedef struct _pdfio_value_s pdf_value_t;
//
extern bool pdfioArrayAppendArray(pdfio_array_t *a, pdfio_array_t *value) PDFIO_PUBLIC;
extern bool pdfioArrayAppendBoolean(pdfio_array_t *a, boolean value) PDFIO_PUBLIC;
extern bool pdfioArrayAppendBoolean(pdfio_array_t *a, bool value) PDFIO_PUBLIC;
extern bool pdfioArrayAppendDict(pdfio_array_t *a, pdfio_dict_t *value) PDFIO_PUBLIC;
extern bool pdfioArrayAppendName(pdfio_array_t *a, const char *value) PDFIO_PUBLIC;
extern bool pdfioArrayAppendNumber(pdfio_array_t *a, float value) PDFIO_PUBLIC;
extern bool pdfioArrayAppendObject(pdfio_array_t *a, pdfio_obj_t *value) PDFIO_PUBLIC;
extern bool pdfioArrayAppendString(pdfio_array_t *a, const char *value) PDFIO_PUBLIC;
extern pdfio_array_t *pdfioArrayCreate(pdfio_file_t *file) PDFIO_PUBLIC;
extern pdfio_array_t *pdfioArrayGetArray(pdfio_array_t *a, int n) PDFIO_PUBLIC;
extern bool pdfioArrayGetBoolean(pdfio_array_t *a, int n) PDFIO_PUBLIC;
extern pdfio_dict_t *pdfioArrayGetDict(pdfio_array_t *a, int n) PDFIO_PUBLIC;
extern const char *pdfioArrayGetName(pdfio_array_t *a, int n) PDFIO_PUBLIC;
extern float pdfioArrayGetNumber(pdfio_array_t *a, int n) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioArrayGetObject(pdfio_array_t *a, int n) PDFIO_PUBLIC;
extern int pdfioArrayGetSize(pdfio_array_t *a) PDFIO_PUBLIC;
extern const char *pdfioArrayGetString(pdfio_array_t *a, int n) PDFIO_PUBLIC;
extern pdfio_valtype_t pdfioArrayGetType(pdfio_array_t *a, int n) PDFIO_PUBLIC;
extern pdfio_array_t *pdfioArrayGetArray(pdfio_array_t *a, size_t n) PDFIO_PUBLIC;
extern bool pdfioArrayGetBoolean(pdfio_array_t *a, size_t n) PDFIO_PUBLIC;
extern pdfio_dict_t *pdfioArrayGetDict(pdfio_array_t *a, size_t n) PDFIO_PUBLIC;
extern const char *pdfioArrayGetName(pdfio_array_t *a, size_t n) PDFIO_PUBLIC;
extern float pdfioArrayGetNumber(pdfio_array_t *a, size_t n) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioArrayGetObject(pdfio_array_t *a, size_t n) PDFIO_PUBLIC;
extern size_t pdfioArrayGetSize(pdfio_array_t *a) PDFIO_PUBLIC;
extern const char *pdfioArrayGetString(pdfio_array_t *a, size_t n) PDFIO_PUBLIC;
extern pdfio_valtype_t pdfioArrayGetType(pdfio_array_t *a, size_t n) PDFIO_PUBLIC;
extern pdfio_dict_t *pdfioDictCreate(pdfio_file_t *file) PDFIO_PUBLIC;
extern pdfio_array_t *pdfioDictGetArray(pdfio_dict_t *dict, const char *name) PDFIO_PUBLIC;
@ -129,23 +132,23 @@ extern bool pdfioDictSetStringf(pdfio_dict_t *dict, const char *name, const cha
extern bool pdfioFileClose(pdfio_file_t *pdf) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileCreateObject(pdfio_file_t *file, pdfio_dict_t *dict) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileCreatePage(pdfio_t *pdf, pdfio_dict_t *dict) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileCreatePage(pdfio_file_t *pdf, pdfio_dict_t *dict) PDFIO_PUBLIC;
extern const char *pdfioFileGetName(pdfio_file_t *pdf) PDFIO_PUBLIC;
extern int pdfioFileGetNumObjects(pdfio_file_t *pdf) PDFIO_PUBLIC;
extern int pdfioFileGetNumPages(pdfio_file_t *pdf) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileGetObject(pdfio_file_t *pdf, int number) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileGetPage(pdfio_file_t *pdf, int number) PDFIO_PUBLIC;
extern unsigned pdfioFileGetNumObjects(pdfio_file_t *pdf) PDFIO_PUBLIC;
extern unsigned pdfioFileGetNumPages(pdfio_file_t *pdf) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileGetObject(pdfio_file_t *pdf, unsigned number) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileGetPage(pdfio_file_t *pdf, unsigned number) PDFIO_PUBLIC;
extern pdfio_file_t *pdfioFileOpen(const char *filename, const char *mode, pdfio_error_cb_t error_cb, void *error_data) PDFIO_PUBLIC;
extern bool pdfioObjClose(pdfio_object_t *obj) PDFIO_PUBLIC;
extern bool pdfioObjClose(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern pdfio_stream_t *pdfioObjCreateStream(pdfio_obj_t *obj, pdfio_compress_t compression) PDFIO_PUBLIC;
extern pdfio_dict_t *pdfioObjGetDict(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern int pdfioObjGetGeneration(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern int pdfioObjGetNumber(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern unsigned pdfioObjGetGeneration(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern unsigned pdfioObjGetNumber(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern pdfio_stream_t *pdfioObjGetStream(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern const char *pdfioObjGetType(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioPageCopy(pdfio_t *pdf, pdfio_obj_t *src) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioPageCopy(pdfio_file_t *pdf, pdfio_obj_t *src) PDFIO_PUBLIC;
extern bool pdfioStreamClose(pdfio_stream_t *st) PDFIO_PUBLIC;
extern bool pdfioStreamPrintf(pdfio_stream_t *st, const char *format, ...) PDFIO_PUBLIC PDFIO_FORMAT(2,3);
@ -153,6 +156,9 @@ extern bool pdfioStreamPuts(pdfio_stream_t *st, const char *s) PDFIO_PUBLIC;
extern ssize_t pdfioStreamRead(pdfio_stream_t *st, void *buffer, size_t bytes) PDFIO_PUBLIC;
extern bool pdfioStreamWrite(pdfio_stream_t *st, const void *buffer, size_t bytes) PDFIO_PUBLIC;
extern char *pdfioStringCreate(pdfio_file_t *pdf, const char *s) PDFIO_PUBLIC;
extern char *pdfioStringCreatef(pdfio_file_t *pdf, const char *format, ...) PDFIO_FORMAT(2,3) PDFIO_PUBLIC;
//
// C++ magic...