diff options
Diffstat (limited to 'pdf/base_object.c')
-rw-r--r-- | pdf/base_object.c | 1266 |
1 files changed, 1266 insertions, 0 deletions
diff --git a/pdf/base_object.c b/pdf/base_object.c new file mode 100644 index 00000000..460b89f2 --- /dev/null +++ b/pdf/base_object.c @@ -0,0 +1,1266 @@ +#include "fitz-internal.h" +#include "mupdf-internal.h" + +typedef enum pdf_objkind_e +{ + PDF_NULL, + PDF_BOOL, + PDF_INT, + PDF_REAL, + PDF_STRING, + PDF_NAME, + PDF_ARRAY, + PDF_DICT, + PDF_INDIRECT +} pdf_objkind; + +struct keyval +{ + pdf_obj *k; + pdf_obj *v; +}; + +struct pdf_obj_s +{ + int refs; + pdf_objkind kind; + fz_context *ctx; + union + { + int b; + int i; + float f; + struct { + unsigned short len; + char buf[1]; + } s; + char n[1]; + struct { + int len; + int cap; + pdf_obj **items; + } a; + struct { + char sorted; + char marked; + int len; + int cap; + struct keyval *items; + } d; + struct { + int num; + int gen; + struct pdf_xref_s *xref; + } r; + } u; +}; + +pdf_obj * +pdf_new_null(fz_context *ctx) +{ + pdf_obj *obj; + obj = Memento_label(fz_malloc(ctx, sizeof(pdf_obj)), "pdf_obj(null)"); + obj->ctx = ctx; + obj->refs = 1; + obj->kind = PDF_NULL; + return obj; +} + +pdf_obj * +pdf_new_bool(fz_context *ctx, int b) +{ + pdf_obj *obj; + obj = Memento_label(fz_malloc(ctx, sizeof(pdf_obj)), "pdf_obj(bool)"); + obj->ctx = ctx; + obj->refs = 1; + obj->kind = PDF_BOOL; + obj->u.b = b; + return obj; +} + +pdf_obj * +pdf_new_int(fz_context *ctx, int i) +{ + pdf_obj *obj; + obj = Memento_label(fz_malloc(ctx, sizeof(pdf_obj)), "pdf_obj(int)"); + obj->ctx = ctx; + obj->refs = 1; + obj->kind = PDF_INT; + obj->u.i = i; + return obj; +} + +pdf_obj * +pdf_new_real(fz_context *ctx, float f) +{ + pdf_obj *obj; + obj = Memento_label(fz_malloc(ctx, sizeof(pdf_obj)), "pdf_obj(real)"); + obj->ctx = ctx; + obj->refs = 1; + obj->kind = PDF_REAL; + obj->u.f = f; + return obj; +} + +pdf_obj * +pdf_new_string(fz_context *ctx, char *str, int len) +{ + pdf_obj *obj; + obj = Memento_label(fz_malloc(ctx, offsetof(pdf_obj, u.s.buf) + len + 1), "pdf_obj(string)"); + obj->ctx = ctx; + obj->refs = 1; + obj->kind = PDF_STRING; + obj->u.s.len = len; + memcpy(obj->u.s.buf, str, len); + obj->u.s.buf[len] = '\0'; + return obj; +} + +pdf_obj * +fz_new_name(fz_context *ctx, char *str) +{ + pdf_obj *obj; + obj = Memento_label(fz_malloc(ctx, offsetof(pdf_obj, u.n) + strlen(str) + 1), "pdf_obj(name)"); + obj->ctx = ctx; + obj->refs = 1; + obj->kind = PDF_NAME; + strcpy(obj->u.n, str); + return obj; +} + +pdf_obj * +pdf_new_indirect(fz_context *ctx, int num, int gen, void *xref) +{ + pdf_obj *obj; + obj = Memento_label(fz_malloc(ctx, sizeof(pdf_obj)), "pdf_obj(indirect)"); + obj->ctx = ctx; + obj->refs = 1; + obj->kind = PDF_INDIRECT; + obj->u.r.num = num; + obj->u.r.gen = gen; + obj->u.r.xref = xref; + return obj; +} + +pdf_obj * +pdf_keep_obj(pdf_obj *obj) +{ + assert(obj); + obj->refs ++; + return obj; +} + +int pdf_is_indirect(pdf_obj *obj) +{ + return obj ? obj->kind == PDF_INDIRECT : 0; +} + +#define RESOLVE(obj) \ + do { \ + if (obj && obj->kind == PDF_INDIRECT) \ + {\ + fz_assert_lock_not_held(obj->ctx, FZ_LOCK_FILE); \ + obj = pdf_resolve_indirect(obj); \ + } \ + } while (0) + +int pdf_is_null(pdf_obj *obj) +{ + RESOLVE(obj); + return obj ? obj->kind == PDF_NULL : 0; +} + +int pdf_is_bool(pdf_obj *obj) +{ + RESOLVE(obj); + return obj ? obj->kind == PDF_BOOL : 0; +} + +int pdf_is_int(pdf_obj *obj) +{ + RESOLVE(obj); + return obj ? obj->kind == PDF_INT : 0; +} + +int pdf_is_real(pdf_obj *obj) +{ + RESOLVE(obj); + return obj ? obj->kind == PDF_REAL : 0; +} + +int pdf_is_string(pdf_obj *obj) +{ + RESOLVE(obj); + return obj ? obj->kind == PDF_STRING : 0; +} + +int pdf_is_name(pdf_obj *obj) +{ + RESOLVE(obj); + return obj ? obj->kind == PDF_NAME : 0; +} + +int pdf_is_array(pdf_obj *obj) +{ + RESOLVE(obj); + return obj ? obj->kind == PDF_ARRAY : 0; +} + +int pdf_is_dict(pdf_obj *obj) +{ + RESOLVE(obj); + return obj ? obj->kind == PDF_DICT : 0; +} + +int pdf_to_bool(pdf_obj *obj) +{ + RESOLVE(obj); + if (!obj) + return 0; + return obj->kind == PDF_BOOL ? obj->u.b : 0; +} + +int pdf_to_int(pdf_obj *obj) +{ + RESOLVE(obj); + if (!obj) + return 0; + if (obj->kind == PDF_INT) + return obj->u.i; + if (obj->kind == PDF_REAL) + return (int)(obj->u.f + 0.5f); /* No roundf in MSVC */ + return 0; +} + +float pdf_to_real(pdf_obj *obj) +{ + RESOLVE(obj); + if (!obj) + return 0; + if (obj->kind == PDF_REAL) + return obj->u.f; + if (obj->kind == PDF_INT) + return obj->u.i; + return 0; +} + +char *pdf_to_name(pdf_obj *obj) +{ + RESOLVE(obj); + if (!obj || obj->kind != PDF_NAME) + return ""; + return obj->u.n; +} + +char *pdf_to_str_buf(pdf_obj *obj) +{ + RESOLVE(obj); + if (!obj || obj->kind != PDF_STRING) + return ""; + return obj->u.s.buf; +} + +int pdf_to_str_len(pdf_obj *obj) +{ + RESOLVE(obj); + if (!obj || obj->kind != PDF_STRING) + return 0; + return obj->u.s.len; +} + +/* for use by pdf_crypt_obj_imp to decrypt AES string in place */ +void pdf_set_str_len(pdf_obj *obj, int newlen) +{ + RESOLVE(obj); + if (!obj || obj->kind != PDF_STRING) + return; /* This should never happen */ + if (newlen > obj->u.s.len) + return; /* This should never happen */ + obj->u.s.len = newlen; +} + +pdf_obj *pdf_to_dict(pdf_obj *obj) +{ + RESOLVE(obj); + return (obj && obj->kind == PDF_DICT ? obj : NULL); +} + +int pdf_to_num(pdf_obj *obj) +{ + if (!obj || obj->kind != PDF_INDIRECT) + return 0; + return obj->u.r.num; +} + +int pdf_to_gen(pdf_obj *obj) +{ + if (!obj || obj->kind != PDF_INDIRECT) + return 0; + return obj->u.r.gen; +} + +void *pdf_get_indirect_document(pdf_obj *obj) +{ + if (!obj || obj->kind != PDF_INDIRECT) + return NULL; + return obj->u.r.xref; +} + +int +pdf_objcmp(pdf_obj *a, pdf_obj *b) +{ + int i; + + if (a == b) + return 0; + + if (!a || !b) + return 1; + + if (a->kind != b->kind) + return 1; + + switch (a->kind) + { + case PDF_NULL: + return 0; + + case PDF_BOOL: + return a->u.b - b->u.b; + + case PDF_INT: + return a->u.i - b->u.i; + + case PDF_REAL: + if (a->u.f < b->u.f) + return -1; + if (a->u.f > b->u.f) + return 1; + return 0; + + case PDF_STRING: + if (a->u.s.len < b->u.s.len) + { + if (memcmp(a->u.s.buf, b->u.s.buf, a->u.s.len) <= 0) + return -1; + return 1; + } + if (a->u.s.len > b->u.s.len) + { + if (memcmp(a->u.s.buf, b->u.s.buf, b->u.s.len) >= 0) + return 1; + return -1; + } + return memcmp(a->u.s.buf, b->u.s.buf, a->u.s.len); + + case PDF_NAME: + return strcmp(a->u.n, b->u.n); + + case PDF_INDIRECT: + if (a->u.r.num == b->u.r.num) + return a->u.r.gen - b->u.r.gen; + return a->u.r.num - b->u.r.num; + + case PDF_ARRAY: + if (a->u.a.len != b->u.a.len) + return a->u.a.len - b->u.a.len; + for (i = 0; i < a->u.a.len; i++) + if (pdf_objcmp(a->u.a.items[i], b->u.a.items[i])) + return 1; + return 0; + + case PDF_DICT: + if (a->u.d.len != b->u.d.len) + return a->u.d.len - b->u.d.len; + for (i = 0; i < a->u.d.len; i++) + { + if (pdf_objcmp(a->u.d.items[i].k, b->u.d.items[i].k)) + return 1; + if (pdf_objcmp(a->u.d.items[i].v, b->u.d.items[i].v)) + return 1; + } + return 0; + + } + return 1; +} + +static char * +pdf_objkindstr(pdf_obj *obj) +{ + if (!obj) + return "<NULL>"; + switch (obj->kind) + { + case PDF_NULL: return "null"; + case PDF_BOOL: return "boolean"; + case PDF_INT: return "integer"; + case PDF_REAL: return "real"; + case PDF_STRING: return "string"; + case PDF_NAME: return "name"; + case PDF_ARRAY: return "array"; + case PDF_DICT: return "dictionary"; + case PDF_INDIRECT: return "reference"; + } + return "<unknown>"; +} + +pdf_obj * +pdf_new_array(fz_context *ctx, int initialcap) +{ + pdf_obj *obj; + int i; + + obj = Memento_label(fz_malloc(ctx, sizeof(pdf_obj)), "pdf_obj(array)"); + obj->ctx = ctx; + obj->refs = 1; + obj->kind = PDF_ARRAY; + + obj->u.a.len = 0; + obj->u.a.cap = initialcap > 1 ? initialcap : 6; + + fz_try(ctx) + { + obj->u.a.items = Memento_label(fz_malloc_array(ctx, obj->u.a.cap, sizeof(pdf_obj*)), "pdf_obj(array items)"); + } + fz_catch(ctx) + { + fz_free(ctx, obj); + fz_rethrow(ctx); + } + for (i = 0; i < obj->u.a.cap; i++) + obj->u.a.items[i] = NULL; + + return obj; +} + +static void +pdf_array_grow(pdf_obj *obj) +{ + int i; + + obj->u.a.cap = (obj->u.a.cap * 3) / 2; + obj->u.a.items = fz_resize_array(obj->ctx, obj->u.a.items, obj->u.a.cap, sizeof(pdf_obj*)); + + for (i = obj->u.a.len ; i < obj->u.a.cap; i++) + obj->u.a.items[i] = NULL; +} + +pdf_obj * +pdf_copy_array(fz_context *ctx, pdf_obj *obj) +{ + pdf_obj *arr; + int i; + int n; + + RESOLVE(obj); + if (!obj || obj->kind != PDF_ARRAY) + fz_warn(ctx, "assert: not an array (%s)", pdf_objkindstr(obj)); + + arr = pdf_new_array(ctx, pdf_array_len(obj)); + n = pdf_array_len(obj); + for (i = 0; i < n; i++) + pdf_array_push(arr, pdf_array_get(obj, i)); + + return arr; +} + +int +pdf_array_len(pdf_obj *obj) +{ + RESOLVE(obj); + if (!obj || obj->kind != PDF_ARRAY) + return 0; + return obj->u.a.len; +} + +pdf_obj * +pdf_array_get(pdf_obj *obj, int i) +{ + RESOLVE(obj); + + if (!obj || obj->kind != PDF_ARRAY) + return NULL; + + if (i < 0 || i >= obj->u.a.len) + return NULL; + + return obj->u.a.items[i]; +} + +void +pdf_array_put(pdf_obj *obj, int i, pdf_obj *item) +{ + RESOLVE(obj); + + if (!obj) + return; /* Can't warn :( */ + if (obj->kind != PDF_ARRAY) + fz_warn(obj->ctx, "assert: not an array (%s)", pdf_objkindstr(obj)); + else if (i < 0) + fz_warn(obj->ctx, "assert: index %d < 0", i); + else if (i >= obj->u.a.len) + fz_warn(obj->ctx, "assert: index %d > length %d", i, obj->u.a.len); + else + { + if (obj->u.a.items[i]) + pdf_drop_obj(obj->u.a.items[i]); + obj->u.a.items[i] = pdf_keep_obj(item); + } +} + +void +pdf_array_push(pdf_obj *obj, pdf_obj *item) +{ + RESOLVE(obj); + + if (!obj) + return; /* Can't warn :( */ + if (obj->kind != PDF_ARRAY) + fz_warn(obj->ctx, "assert: not an array (%s)", pdf_objkindstr(obj)); + else + { + if (obj->u.a.len + 1 > obj->u.a.cap) + pdf_array_grow(obj); + obj->u.a.items[obj->u.a.len] = pdf_keep_obj(item); + obj->u.a.len++; + } +} + +void +pdf_array_insert(pdf_obj *obj, pdf_obj *item) +{ + RESOLVE(obj); + + if (!obj) + return; /* Can't warn :( */ + if (obj->kind != PDF_ARRAY) + fz_warn(obj->ctx, "assert: not an array (%s)", pdf_objkindstr(obj)); + else + { + if (obj->u.a.len + 1 > obj->u.a.cap) + pdf_array_grow(obj); + memmove(obj->u.a.items + 1, obj->u.a.items, obj->u.a.len * sizeof(pdf_obj*)); + obj->u.a.items[0] = pdf_keep_obj(item); + obj->u.a.len++; + } +} + +int +pdf_array_contains(pdf_obj *arr, pdf_obj *obj) +{ + int i; + + for (i = 0; i < pdf_array_len(arr); i++) + if (!pdf_objcmp(pdf_array_get(arr, i), obj)) + return 1; + + return 0; +} + +/* dicts may only have names as keys! */ + +static int keyvalcmp(const void *ap, const void *bp) +{ + const struct keyval *a = ap; + const struct keyval *b = bp; + return strcmp(pdf_to_name(a->k), pdf_to_name(b->k)); +} + +pdf_obj * +pdf_new_dict(fz_context *ctx, int initialcap) +{ + pdf_obj *obj; + int i; + + obj = Memento_label(fz_malloc(ctx, sizeof(pdf_obj)), "pdf_obj(dict)"); + obj->ctx = ctx; + obj->refs = 1; + obj->kind = PDF_DICT; + + obj->u.d.sorted = 0; + obj->u.d.marked = 0; + obj->u.d.len = 0; + obj->u.d.cap = initialcap > 1 ? initialcap : 10; + + fz_try(ctx) + { + obj->u.d.items = Memento_label(fz_malloc_array(ctx, obj->u.d.cap, sizeof(struct keyval)), "pdf_obj(dict items)"); + } + fz_catch(ctx) + { + fz_free(ctx, obj); + fz_rethrow(ctx); + } + for (i = 0; i < obj->u.d.cap; i++) + { + obj->u.d.items[i].k = NULL; + obj->u.d.items[i].v = NULL; + } + + return obj; +} + +static void +pdf_dict_grow(pdf_obj *obj) +{ + int i; + + obj->u.d.cap = (obj->u.d.cap * 3) / 2; + obj->u.d.items = fz_resize_array(obj->ctx, obj->u.d.items, obj->u.d.cap, sizeof(struct keyval)); + + for (i = obj->u.d.len; i < obj->u.d.cap; i++) + { + obj->u.d.items[i].k = NULL; + obj->u.d.items[i].v = NULL; + } +} + +pdf_obj * +pdf_copy_dict(fz_context *ctx, pdf_obj *obj) +{ + pdf_obj *dict; + int i, n; + + RESOLVE(obj); + if (obj && obj->kind != PDF_DICT) + fz_warn(ctx, "assert: not a dict (%s)", pdf_objkindstr(obj)); + + n = pdf_dict_len(obj); + dict = pdf_new_dict(ctx, n); + for (i = 0; i < n; i++) + fz_dict_put(dict, pdf_dict_get_key(obj, i), pdf_dict_get_val(obj, i)); + + return dict; +} + +int +pdf_dict_len(pdf_obj *obj) +{ + RESOLVE(obj); + if (!obj || obj->kind != PDF_DICT) + return 0; + return obj->u.d.len; +} + +pdf_obj * +pdf_dict_get_key(pdf_obj *obj, int i) +{ + RESOLVE(obj); + if (!obj || obj->kind != PDF_DICT) + return NULL; + + if (i < 0 || i >= obj->u.d.len) + return NULL; + + return obj->u.d.items[i].k; +} + +pdf_obj * +pdf_dict_get_val(pdf_obj *obj, int i) +{ + RESOLVE(obj); + if (!obj || obj->kind != PDF_DICT) + return NULL; + + if (i < 0 || i >= obj->u.d.len) + return NULL; + + return obj->u.d.items[i].v; +} + +static int +pdf_dict_finds(pdf_obj *obj, char *key, int *location) +{ + if (obj->u.d.sorted && obj->u.d.len > 0) + { + int l = 0; + int r = obj->u.d.len - 1; + + if (strcmp(pdf_to_name(obj->u.d.items[r].k), key) < 0) + { + if (location) + *location = r + 1; + return -1; + } + + while (l <= r) + { + int m = (l + r) >> 1; + int c = -strcmp(pdf_to_name(obj->u.d.items[m].k), key); + if (c < 0) + r = m - 1; + else if (c > 0) + l = m + 1; + else + return m; + + if (location) + *location = l; + } + } + + else + { + int i; + for (i = 0; i < obj->u.d.len; i++) + if (strcmp(pdf_to_name(obj->u.d.items[i].k), key) == 0) + return i; + + if (location) + *location = obj->u.d.len; + } + + return -1; +} + +pdf_obj * +pdf_dict_gets(pdf_obj *obj, char *key) +{ + int i; + + RESOLVE(obj); + if (!obj || obj->kind != PDF_DICT) + return NULL; + + i = pdf_dict_finds(obj, key, NULL); + if (i >= 0) + return obj->u.d.items[i].v; + + return NULL; +} + +pdf_obj * +pdf_dict_get(pdf_obj *obj, pdf_obj *key) +{ + if (!key || key->kind != PDF_NAME) + return NULL; + return pdf_dict_gets(obj, pdf_to_name(key)); +} + +pdf_obj * +pdf_dict_getsa(pdf_obj *obj, char *key, char *abbrev) +{ + pdf_obj *v; + v = pdf_dict_gets(obj, key); + if (v) + return v; + return pdf_dict_gets(obj, abbrev); +} + +void +fz_dict_put(pdf_obj *obj, pdf_obj *key, pdf_obj *val) +{ + int location; + char *s; + int i; + + RESOLVE(obj); + if (!obj || obj->kind != PDF_DICT) + { + fz_warn(obj->ctx, "assert: not a dict (%s)", pdf_objkindstr(obj)); + return; + } + + RESOLVE(key); + if (!key || key->kind != PDF_NAME) + { + fz_warn(obj->ctx, "assert: key is not a name (%s)", pdf_objkindstr(obj)); + return; + } + else + s = pdf_to_name(key); + + if (!val) + { + fz_warn(obj->ctx, "assert: val does not exist for key (%s)", s); + return; + } + + if (obj->u.d.len > 100 && !obj->u.d.sorted) + pdf_sort_dict(obj); + + i = pdf_dict_finds(obj, s, &location); + if (i >= 0 && i < obj->u.d.len) + { + pdf_drop_obj(obj->u.d.items[i].v); + obj->u.d.items[i].v = pdf_keep_obj(val); + } + else + { + if (obj->u.d.len + 1 > obj->u.d.cap) + pdf_dict_grow(obj); + + i = location; + if (obj->u.d.sorted && obj->u.d.len > 0) + memmove(&obj->u.d.items[i + 1], + &obj->u.d.items[i], + (obj->u.d.len - i) * sizeof(struct keyval)); + + obj->u.d.items[i].k = pdf_keep_obj(key); + obj->u.d.items[i].v = pdf_keep_obj(val); + obj->u.d.len ++; + } +} + +void +pdf_dict_puts(pdf_obj *obj, char *key, pdf_obj *val) +{ + pdf_obj *keyobj = fz_new_name(obj->ctx, key); + fz_dict_put(obj, keyobj, val); + pdf_drop_obj(keyobj); +} + +void +pdf_dict_dels(pdf_obj *obj, char *key) +{ + RESOLVE(obj); + + if (!obj || obj->kind != PDF_DICT) + fz_warn(obj->ctx, "assert: not a dict (%s)", pdf_objkindstr(obj)); + else + { + int i = pdf_dict_finds(obj, key, NULL); + if (i >= 0) + { + pdf_drop_obj(obj->u.d.items[i].k); + pdf_drop_obj(obj->u.d.items[i].v); + obj->u.d.sorted = 0; + obj->u.d.items[i] = obj->u.d.items[obj->u.d.len-1]; + obj->u.d.len --; + } + } +} + +void +pdf_dict_del(pdf_obj *obj, pdf_obj *key) +{ + RESOLVE(key); + if (!key || key->kind != PDF_NAME) + fz_warn(obj->ctx, "assert: key is not a name (%s)", pdf_objkindstr(obj)); + else + pdf_dict_dels(obj, key->u.n); +} + +void +pdf_sort_dict(pdf_obj *obj) +{ + RESOLVE(obj); + if (!obj || obj->kind != PDF_DICT) + return; + if (!obj->u.d.sorted) + { + qsort(obj->u.d.items, obj->u.d.len, sizeof(struct keyval), keyvalcmp); + obj->u.d.sorted = 1; + } +} + +int +pdf_dict_marked(pdf_obj *obj) +{ + RESOLVE(obj); + if (!obj || obj->kind != PDF_DICT) + return 0; + return obj->u.d.marked; +} + +int +pdf_dict_mark(pdf_obj *obj) +{ + int marked; + RESOLVE(obj); + if (!obj || obj->kind != PDF_DICT) + return 0; + marked = obj->u.d.marked; + obj->u.d.marked = 1; + return marked; +} + +void +pdf_dict_unmark(pdf_obj *obj) +{ + RESOLVE(obj); + if (!obj || obj->kind != PDF_DICT) + return; + obj->u.d.marked = 0; +} + +static void +pdf_free_array(pdf_obj *obj) +{ + int i; + + for (i = 0; i < obj->u.a.len; i++) + if (obj->u.a.items[i]) + pdf_drop_obj(obj->u.a.items[i]); + + fz_free(obj->ctx, obj->u.a.items); + fz_free(obj->ctx, obj); +} + +static void +pdf_free_dict(pdf_obj *obj) +{ + int i; + + for (i = 0; i < obj->u.d.len; i++) { + if (obj->u.d.items[i].k) + pdf_drop_obj(obj->u.d.items[i].k); + if (obj->u.d.items[i].v) + pdf_drop_obj(obj->u.d.items[i].v); + } + + fz_free(obj->ctx, obj->u.d.items); + fz_free(obj->ctx, obj); +} + +void +pdf_drop_obj(pdf_obj *obj) +{ + if (!obj) + return; + if (--obj->refs) + return; + if (obj->kind == PDF_ARRAY) + pdf_free_array(obj); + else if (obj->kind == PDF_DICT) + pdf_free_dict(obj); + else + fz_free(obj->ctx, obj); +} + +/* Pretty printing objects */ + +struct fmt +{ + char *buf; + int cap; + int len; + int indent; + int tight; + int col; + int sep; + int last; +}; + +static void fmt_obj(struct fmt *fmt, pdf_obj *obj); + +static inline int iswhite(int ch) +{ + return + ch == '\000' || + ch == '\011' || + ch == '\012' || + ch == '\014' || + ch == '\015' || + ch == '\040'; +} + +static inline int isdelim(int ch) +{ + return ch == '(' || ch == ')' || + ch == '<' || ch == '>' || + ch == '[' || ch == ']' || + ch == '{' || ch == '}' || + ch == '/' || + ch == '%'; +} + +static inline void fmt_putc(struct fmt *fmt, int c) +{ + if (fmt->sep && !isdelim(fmt->last) && !isdelim(c)) { + fmt->sep = 0; + fmt_putc(fmt, ' '); + } + fmt->sep = 0; + + if (fmt->buf && fmt->len < fmt->cap) + fmt->buf[fmt->len] = c; + + if (c == '\n') + fmt->col = 0; + else + fmt->col ++; + + fmt->len ++; + + fmt->last = c; +} + +static inline void fmt_indent(struct fmt *fmt) +{ + int i = fmt->indent; + while (i--) { + fmt_putc(fmt, ' '); + fmt_putc(fmt, ' '); + } +} + +static inline void fmt_puts(struct fmt *fmt, char *s) +{ + while (*s) + fmt_putc(fmt, *s++); +} + +static inline void fmt_sep(struct fmt *fmt) +{ + fmt->sep = 1; +} + +static void fmt_str(struct fmt *fmt, pdf_obj *obj) +{ + char *s = pdf_to_str_buf(obj); + int n = pdf_to_str_len(obj); + int i, c; + + fmt_putc(fmt, '('); + for (i = 0; i < n; i++) + { + c = (unsigned char)s[i]; + if (c == '\n') + fmt_puts(fmt, "\\n"); + else if (c == '\r') + fmt_puts(fmt, "\\r"); + else if (c == '\t') + fmt_puts(fmt, "\\t"); + else if (c == '\b') + fmt_puts(fmt, "\\b"); + else if (c == '\f') + fmt_puts(fmt, "\\f"); + else if (c == '(') + fmt_puts(fmt, "\\("); + else if (c == ')') + fmt_puts(fmt, "\\)"); + else if (c < 32 || c >= 127) { + char buf[16]; + fmt_putc(fmt, '\\'); + sprintf(buf, "%03o", c); + fmt_puts(fmt, buf); + } + else + fmt_putc(fmt, c); + } + fmt_putc(fmt, ')'); +} + +static void fmt_hex(struct fmt *fmt, pdf_obj *obj) +{ + char *s = pdf_to_str_buf(obj); + int n = pdf_to_str_len(obj); + int i, b, c; + + fmt_putc(fmt, '<'); + for (i = 0; i < n; i++) { + b = (unsigned char) s[i]; + c = (b >> 4) & 0x0f; + fmt_putc(fmt, c < 0xA ? c + '0' : c + 'A' - 0xA); + c = (b) & 0x0f; + fmt_putc(fmt, c < 0xA ? c + '0' : c + 'A' - 0xA); + } + fmt_putc(fmt, '>'); +} + +static void fmt_name(struct fmt *fmt, pdf_obj *obj) +{ + unsigned char *s = (unsigned char *) pdf_to_name(obj); + int i, c; + + fmt_putc(fmt, '/'); + + for (i = 0; s[i]; i++) + { + if (isdelim(s[i]) || iswhite(s[i]) || + s[i] == '#' || s[i] < 32 || s[i] >= 127) + { + fmt_putc(fmt, '#'); + c = (s[i] >> 4) & 0xf; + fmt_putc(fmt, c < 0xA ? c + '0' : c + 'A' - 0xA); + c = s[i] & 0xf; + fmt_putc(fmt, c < 0xA ? c + '0' : c + 'A' - 0xA); + } + else + { + fmt_putc(fmt, s[i]); + } + } +} + +static void fmt_array(struct fmt *fmt, pdf_obj *obj) +{ + int i, n; + + n = pdf_array_len(obj); + if (fmt->tight) { + fmt_putc(fmt, '['); + for (i = 0; i < n; i++) { + fmt_obj(fmt, pdf_array_get(obj, i)); + fmt_sep(fmt); + } + fmt_putc(fmt, ']'); + } + else { + fmt_puts(fmt, "[ "); + for (i = 0; i < n; i++) { + if (fmt->col > 60) { + fmt_putc(fmt, '\n'); + fmt_indent(fmt); + } + fmt_obj(fmt, pdf_array_get(obj, i)); + fmt_putc(fmt, ' '); + } + fmt_putc(fmt, ']'); + fmt_sep(fmt); + } +} + +static void fmt_dict(struct fmt *fmt, pdf_obj *obj) +{ + int i, n; + pdf_obj *key, *val; + + n = pdf_dict_len(obj); + if (fmt->tight) { + fmt_puts(fmt, "<<"); + for (i = 0; i < n; i++) { + fmt_obj(fmt, pdf_dict_get_key(obj, i)); + fmt_sep(fmt); + fmt_obj(fmt, pdf_dict_get_val(obj, i)); + fmt_sep(fmt); + } + fmt_puts(fmt, ">>"); + } + else { + fmt_puts(fmt, "<<\n"); + fmt->indent ++; + for (i = 0; i < n; i++) { + key = pdf_dict_get_key(obj, i); + val = pdf_dict_get_val(obj, i); + fmt_indent(fmt); + fmt_obj(fmt, key); + fmt_putc(fmt, ' '); + if (!pdf_is_indirect(val) && pdf_is_array(val)) + fmt->indent ++; + fmt_obj(fmt, val); + fmt_putc(fmt, '\n'); + if (!pdf_is_indirect(val) && pdf_is_array(val)) + fmt->indent --; + } + fmt->indent --; + fmt_indent(fmt); + fmt_puts(fmt, ">>"); + } +} + +static void fmt_obj(struct fmt *fmt, pdf_obj *obj) +{ + char buf[256]; + + if (!obj) + fmt_puts(fmt, "<NULL>"); + else if (pdf_is_indirect(obj)) + { + sprintf(buf, "%d %d R", pdf_to_num(obj), pdf_to_gen(obj)); + fmt_puts(fmt, buf); + } + else if (pdf_is_null(obj)) + fmt_puts(fmt, "null"); + else if (pdf_is_bool(obj)) + fmt_puts(fmt, pdf_to_bool(obj) ? "true" : "false"); + else if (pdf_is_int(obj)) + { + sprintf(buf, "%d", pdf_to_int(obj)); + fmt_puts(fmt, buf); + } + else if (pdf_is_real(obj)) + { + sprintf(buf, "%g", pdf_to_real(obj)); + if (strchr(buf, 'e')) /* bad news! */ + sprintf(buf, fabsf(pdf_to_real(obj)) > 1 ? "%1.1f" : "%1.8f", pdf_to_real(obj)); + fmt_puts(fmt, buf); + } + else if (pdf_is_string(obj)) + { + char *str = pdf_to_str_buf(obj); + int len = pdf_to_str_len(obj); + int added = 0; + int i, c; + for (i = 0; i < len; i++) { + c = (unsigned char)str[i]; + if (strchr("()\\\n\r\t\b\f", c)) + added ++; + else if (c < 32 || c >= 127) + added += 3; + } + if (added < len) + fmt_str(fmt, obj); + else + fmt_hex(fmt, obj); + } + else if (pdf_is_name(obj)) + fmt_name(fmt, obj); + else if (pdf_is_array(obj)) + fmt_array(fmt, obj); + else if (pdf_is_dict(obj)) + fmt_dict(fmt, obj); + else + fmt_puts(fmt, "<unknown object>"); +} + +static int +pdf_sprint_obj(char *s, int n, pdf_obj *obj, int tight) +{ + struct fmt fmt; + + fmt.indent = 0; + fmt.col = 0; + fmt.sep = 0; + fmt.last = 0; + + fmt.tight = tight; + fmt.buf = s; + fmt.cap = n; + fmt.len = 0; + fmt_obj(&fmt, obj); + + if (fmt.buf && fmt.len < fmt.cap) + fmt.buf[fmt.len] = '\0'; + + return fmt.len; +} + +int +pdf_fprint_obj(FILE *fp, pdf_obj *obj, int tight) +{ + char buf[1024]; + char *ptr; + int n; + + n = pdf_sprint_obj(NULL, 0, obj, tight); + if ((n + 1) < sizeof buf) + { + pdf_sprint_obj(buf, sizeof buf, obj, tight); + fputs(buf, fp); + fputc('\n', fp); + } + else + { + ptr = fz_malloc(obj->ctx, n + 1); + pdf_sprint_obj(ptr, n + 1, obj, tight); + fputs(ptr, fp); + fputc('\n', fp); + fz_free(obj->ctx, ptr); + } + return n; +} + +void +pdf_print_obj(pdf_obj *obj) +{ + pdf_fprint_obj(stdout, obj, 0); +} + +void +pdf_print_ref(pdf_obj *ref) +{ + pdf_print_obj(pdf_resolve_indirect(ref)); +} |