diff options
Diffstat (limited to 'Utilities/cmpdcurses/pdcurses/scr_dump.c')
| -rw-r--r-- | Utilities/cmpdcurses/pdcurses/scr_dump.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/Utilities/cmpdcurses/pdcurses/scr_dump.c b/Utilities/cmpdcurses/pdcurses/scr_dump.c new file mode 100644 index 0000000..d9105bd --- /dev/null +++ b/Utilities/cmpdcurses/pdcurses/scr_dump.c @@ -0,0 +1,217 @@ +/* PDCurses */ + +#include <curspriv.h> + +/*man-start************************************************************** + +scr_dump +-------- + +### Synopsis + + int putwin(WINDOW *win, FILE *filep); + WINDOW *getwin(FILE *filep); + int scr_dump(const char *filename); + int scr_init(const char *filename); + int scr_restore(const char *filename); + int scr_set(const char *filename); + +### Description + + getwin() reads window-related data previously stored in a file by + putwin(). It then creates and initialises a new window using that + data. + + putwin() writes all data associated with a window into a file, using + an unspecified format. This information can be retrieved later using + getwin(). + + scr_dump() writes the current contents of the virtual screen to the + file named by filename in an unspecified format. + + scr_restore() function sets the virtual screen to the contents of the + file named by filename, which must have been written using + scr_dump(). The next refresh operation restores the screen to the way + it looked in the dump file. + + In PDCurses, scr_init() does nothing, and scr_set() is a synonym for + scr_restore(). Also, scr_dump() and scr_restore() save and load from + curscr. This differs from some other implementations, where + scr_init() works with curscr, and scr_restore() works with newscr; + but the effect should be the same. (PDCurses has no newscr.) + +### Return Value + + On successful completion, getwin() returns a pointer to the window it + created. Otherwise, it returns a null pointer. Other functions return + OK or ERR. + +### Portability + X/Open ncurses NetBSD + putwin Y Y Y + getwin Y Y Y + scr_dump Y Y - + scr_init Y Y - + scr_restore Y Y - + scr_set Y Y - + +**man-end****************************************************************/ + +#include <stdlib.h> +#include <string.h> + +#define DUMPVER 1 /* Should be updated whenever the WINDOW struct is + changed */ + +int putwin(WINDOW *win, FILE *filep) +{ + static const char *marker = "PDC"; + static const unsigned char version = DUMPVER; + + PDC_LOG(("putwin() - called\n")); + + /* write the marker and the WINDOW struct */ + + if (filep && fwrite(marker, strlen(marker), 1, filep) + && fwrite(&version, 1, 1, filep) + && fwrite(win, sizeof(WINDOW), 1, filep)) + { + int i; + + /* write each line */ + + for (i = 0; i < win->_maxy && win->_y[i]; i++) + if (!fwrite(win->_y[i], win->_maxx * sizeof(chtype), 1, filep)) + return ERR; + + return OK; + } + + return ERR; +} + +WINDOW *getwin(FILE *filep) +{ + WINDOW *win; + char marker[4]; + int i, nlines, ncols; + + PDC_LOG(("getwin() - called\n")); + + win = malloc(sizeof(WINDOW)); + if (!win) + return (WINDOW *)NULL; + + /* check for the marker, and load the WINDOW struct */ + + if (!filep || !fread(marker, 4, 1, filep) || strncmp(marker, "PDC", 3) + || marker[3] != DUMPVER || !fread(win, sizeof(WINDOW), 1, filep)) + { + free(win); + return (WINDOW *)NULL; + } + + nlines = win->_maxy; + ncols = win->_maxx; + + /* allocate the line pointer array */ + + win->_y = malloc(nlines * sizeof(chtype *)); + if (!win->_y) + { + free(win); + return (WINDOW *)NULL; + } + + /* allocate the minchng and maxchng arrays */ + + win->_firstch = malloc(nlines * sizeof(int)); + if (!win->_firstch) + { + free(win->_y); + free(win); + return (WINDOW *)NULL; + } + + win->_lastch = malloc(nlines * sizeof(int)); + if (!win->_lastch) + { + free(win->_firstch); + free(win->_y); + free(win); + return (WINDOW *)NULL; + } + + /* allocate the lines */ + + win = PDC_makelines(win); + if (!win) + return (WINDOW *)NULL; + + /* read them */ + + for (i = 0; i < nlines; i++) + { + if (!fread(win->_y[i], ncols * sizeof(chtype), 1, filep)) + { + delwin(win); + return (WINDOW *)NULL; + } + } + + touchwin(win); + + return win; +} + +int scr_dump(const char *filename) +{ + FILE *filep; + + PDC_LOG(("scr_dump() - called: filename %s\n", filename)); + + if (filename && (filep = fopen(filename, "wb")) != NULL) + { + int result = putwin(curscr, filep); + fclose(filep); + return result; + } + + return ERR; +} + +int scr_init(const char *filename) +{ + PDC_LOG(("scr_init() - called: filename %s\n", filename)); + + return OK; +} + +int scr_restore(const char *filename) +{ + FILE *filep; + + PDC_LOG(("scr_restore() - called: filename %s\n", filename)); + + if (filename && (filep = fopen(filename, "rb")) != NULL) + { + WINDOW *replacement = getwin(filep); + fclose(filep); + + if (replacement) + { + int result = overwrite(replacement, curscr); + delwin(replacement); + return result; + } + } + + return ERR; +} + +int scr_set(const char *filename) +{ + PDC_LOG(("scr_set() - called: filename %s\n", filename)); + + return scr_restore(filename); +} |