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comparison src/lstream.h @ 647:b39c14581166

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[xemacs-hg @ 2001-08-13 04:45:47 by ben] removal of unsigned, size_t, etc.
author ben
date Mon, 13 Aug 2001 04:46:48 +0000
parents af57a77cbc92
children fdefd0186b75
comparison
equal deleted inserted replaced
646:00c54252fe4f 647:b39c14581166
59 unrepresentable as an ssize_t, so code that checks to see how many 59 unrepresentable as an ssize_t, so code that checks to see how many
60 bytes are actually written (which is mandatory if you are dealing 60 bytes are actually written (which is mandatory if you are dealing
61 with certain types of devices) will get completely screwed up. 61 with certain types of devices) will get completely screwed up.
62 */ 62 */
63 63
64 typedef EMACS_INT Lstream_data_count; 64 typedef EMACS_INT Lstream_Data_Count;
65 65
66 typedef enum lstream_buffering 66 typedef enum lstream_buffering
67 { 67 {
68 /* No buffering. */ 68 /* No buffering. */
69 LSTREAM_UNBUFFERED, 69 LSTREAM_UNBUFFERED,
94 however -- e.g. on process output. */ 94 however -- e.g. on process output. */
95 95
96 typedef struct lstream_implementation 96 typedef struct lstream_implementation
97 { 97 {
98 const char *name; 98 const char *name;
99 Lstream_data_count size; /* Number of additional bytes to be 99 Lstream_Data_Count size; /* Number of additional bytes to be
100 allocated with this stream. Access this 100 allocated with this stream. Access this
101 data using Lstream_data(). */ 101 data using Lstream_data(). */
102 /* Read some data from the stream's end and store it into DATA, which 102 /* Read some data from the stream's end and store it into DATA, which
103 can hold SIZE bytes. Return the number of bytes read. A return 103 can hold SIZE bytes. Return the number of bytes read. A return
104 value of 0 means no bytes can be read at this time. This may 104 value of 0 means no bytes can be read at this time. This may
115 115
116 This function can be NULL if the stream is output-only. */ 116 This function can be NULL if the stream is output-only. */
117 /* The omniscient mly, blinded by the irresistible thrall of Common 117 /* The omniscient mly, blinded by the irresistible thrall of Common
118 Lisp, thinks that it is bogus that the types and implementations 118 Lisp, thinks that it is bogus that the types and implementations
119 of input and output streams are the same. */ 119 of input and output streams are the same. */
120 Lstream_data_count (*reader) (Lstream *stream, unsigned char *data, 120 Lstream_Data_Count (*reader) (Lstream *stream, unsigned char *data,
121 Lstream_data_count size); 121 Lstream_Data_Count size);
122 /* Send some data to the stream's end. Data to be sent is in DATA 122 /* Send some data to the stream's end. Data to be sent is in DATA
123 and is SIZE bytes. Return the number of bytes sent. This 123 and is SIZE bytes. Return the number of bytes sent. This
124 function can send and return fewer bytes than is passed in; in 124 function can send and return fewer bytes than is passed in; in
125 that case, the function will just be called again until there is 125 that case, the function will just be called again until there is
126 no data left or 0 is returned. A return value of 0 means that no 126 no data left or 0 is returned. A return value of 0 means that no
127 more data can be currently stored, but there is no error; the 127 more data can be currently stored, but there is no error; the
128 data will be squirrelled away until the writer can accept 128 data will be squirrelled away until the writer can accept
129 data. (This is useful, e.g., of you're dealing with a 129 data. (This is useful, e.g., of you're dealing with a
130 non-blocking file descriptor and are getting EWOULDBLOCK errors.) 130 non-blocking file descriptor and are getting EWOULDBLOCK errors.)
131 This function can be NULL if the stream is input-only. */ 131 This function can be NULL if the stream is input-only. */
132 Lstream_data_count (*writer) (Lstream *stream, const unsigned char *data, 132 Lstream_Data_Count (*writer) (Lstream *stream, const unsigned char *data,
133 Lstream_data_count size); 133 Lstream_Data_Count size);
134 /* Return non-zero if the last write operation on the stream resulted 134 /* Return non-zero if the last write operation on the stream resulted
135 in an attempt to block (EWOULDBLOCK). If this method does not 135 in an attempt to block (EWOULDBLOCK). If this method does not
136 exists, the implementation returns 0 */ 136 exists, the implementation returns 0 */
137 int (*was_blocked_p) (Lstream *stream); 137 int (*was_blocked_p) (Lstream *stream);
138 /* Rewind the stream. If this is NULL, the stream is not seekable. */ 138 /* Rewind the stream. If this is NULL, the stream is not seekable. */
169 struct lstream 169 struct lstream
170 { 170 {
171 struct lcrecord_header header; 171 struct lcrecord_header header;
172 const Lstream_implementation *imp; /* methods for this stream */ 172 const Lstream_implementation *imp; /* methods for this stream */
173 Lstream_buffering buffering; /* type of buffering in use */ 173 Lstream_buffering buffering; /* type of buffering in use */
174 Lstream_data_count buffering_size; /* number of bytes buffered */ 174 Lstream_Data_Count buffering_size; /* number of bytes buffered */
175 175
176 unsigned char *in_buffer; /* holds characters read from stream end */ 176 unsigned char *in_buffer; /* holds characters read from stream end */
177 Lstream_data_count in_buffer_size; /* allocated size of buffer */ 177 Lstream_Data_Count in_buffer_size; /* allocated size of buffer */
178 Lstream_data_count in_buffer_current; /* number of characters in buffer */ 178 Lstream_Data_Count in_buffer_current; /* number of characters in buffer */
179 Lstream_data_count in_buffer_ind; /* pointer to next character to 179 Lstream_Data_Count in_buffer_ind; /* pointer to next character to
180 take from buffer */ 180 take from buffer */
181 181
182 unsigned char *out_buffer; /* holds characters to write to stream end */ 182 unsigned char *out_buffer; /* holds characters to write to stream end */
183 Lstream_data_count out_buffer_size; /* allocated size of buffer */ 183 Lstream_Data_Count out_buffer_size; /* allocated size of buffer */
184 Lstream_data_count out_buffer_ind; /* pointer to next buffer spot to 184 Lstream_Data_Count out_buffer_ind; /* pointer to next buffer spot to
185 write a character */ 185 write a character */
186 186
187 /* The unget buffer is more or less a stack -- things get pushed 187 /* The unget buffer is more or less a stack -- things get pushed
188 onto the end and read back from the end. Lstream_read() 188 onto the end and read back from the end. Lstream_read()
189 basically reads backwards from the end to get stuff; Lstream_unread() 189 basically reads backwards from the end to get stuff; Lstream_unread()
190 similarly has to push the data on backwards. */ 190 similarly has to push the data on backwards. */
191 unsigned char *unget_buffer; /* holds characters pushed back onto input */ 191 unsigned char *unget_buffer; /* holds characters pushed back onto input */
192 Lstream_data_count unget_buffer_size; /* allocated size of buffer */ 192 Lstream_Data_Count unget_buffer_size; /* allocated size of buffer */
193 Lstream_data_count unget_buffer_ind; /* pointer to next buffer spot 193 Lstream_Data_Count unget_buffer_ind; /* pointer to next buffer spot
194 to write a character */ 194 to write a character */
195 195
196 Lstream_data_count byte_count; 196 Lstream_Data_Count byte_count;
197 int flags; 197 int flags;
198 max_align_t data[1]; 198 max_align_t data[1];
199 }; 199 };
200 200
201 #define LSTREAM_TYPE_P(lstr, type) \ 201 #define LSTREAM_TYPE_P(lstr, type) \
234 int Lstream_flush (Lstream *lstr); 234 int Lstream_flush (Lstream *lstr);
235 int Lstream_flush_out (Lstream *lstr); 235 int Lstream_flush_out (Lstream *lstr);
236 int Lstream_fputc (Lstream *lstr, int c); 236 int Lstream_fputc (Lstream *lstr, int c);
237 int Lstream_fgetc (Lstream *lstr); 237 int Lstream_fgetc (Lstream *lstr);
238 void Lstream_fungetc (Lstream *lstr, int c); 238 void Lstream_fungetc (Lstream *lstr, int c);
239 Lstream_data_count Lstream_read (Lstream *lstr, void *data, 239 Lstream_Data_Count Lstream_read (Lstream *lstr, void *data,
240 Lstream_data_count size); 240 Lstream_Data_Count size);
241 Lstream_data_count Lstream_write (Lstream *lstr, const void *data, 241 Lstream_Data_Count Lstream_write (Lstream *lstr, const void *data,
242 Lstream_data_count size); 242 Lstream_Data_Count size);
243 int Lstream_was_blocked_p (Lstream *lstr); 243 int Lstream_was_blocked_p (Lstream *lstr);
244 void Lstream_unread (Lstream *lstr, const void *data, Lstream_data_count size); 244 void Lstream_unread (Lstream *lstr, const void *data, Lstream_Data_Count size);
245 int Lstream_rewind (Lstream *lstr); 245 int Lstream_rewind (Lstream *lstr);
246 int Lstream_seekable_p (Lstream *lstr); 246 int Lstream_seekable_p (Lstream *lstr);
247 int Lstream_close (Lstream *lstr); 247 int Lstream_close (Lstream *lstr);
248 void Lstream_delete (Lstream *lstr); 248 void Lstream_delete (Lstream *lstr);
249 void Lstream_set_character_mode (Lstream *str); 249 void Lstream_set_character_mode (Lstream *str);
368 int filedesc_stream_fd (Lstream *stream); 368 int filedesc_stream_fd (Lstream *stream);
369 Lisp_Object make_lisp_string_input_stream (Lisp_Object string, 369 Lisp_Object make_lisp_string_input_stream (Lisp_Object string,
370 Bytecount offset, 370 Bytecount offset,
371 Bytecount len); 371 Bytecount len);
372 Lisp_Object make_fixed_buffer_input_stream (const void *buf, 372 Lisp_Object make_fixed_buffer_input_stream (const void *buf,
373 Lstream_data_count size); 373 Lstream_Data_Count size);
374 Lisp_Object make_fixed_buffer_output_stream (void *buf, 374 Lisp_Object make_fixed_buffer_output_stream (void *buf,
375 Lstream_data_count size); 375 Lstream_Data_Count size);
376 const unsigned char *fixed_buffer_input_stream_ptr (Lstream *stream); 376 const unsigned char *fixed_buffer_input_stream_ptr (Lstream *stream);
377 unsigned char *fixed_buffer_output_stream_ptr (Lstream *stream); 377 unsigned char *fixed_buffer_output_stream_ptr (Lstream *stream);
378 Lisp_Object make_resizing_buffer_output_stream (void); 378 Lisp_Object make_resizing_buffer_output_stream (void);
379 unsigned char *resizing_buffer_stream_ptr (Lstream *stream); 379 unsigned char *resizing_buffer_stream_ptr (Lstream *stream);
380 Lisp_Object make_dynarr_output_stream (unsigned_char_dynarr *dyn); 380 Lisp_Object make_dynarr_output_stream (unsigned_char_dynarr *dyn);