pdcurses/scanw.c@9d640b94ef02
pdcurses/scanw.c
Mon, 11 Jan 2016 03:02:26 +0200
- author
- Teemu Piippo <crimsondusk64@gmail.com>
- date
- Mon, 11 Jan 2016 03:02:26 +0200
- changeset 121
- 9d640b94ef02
- parent 97
- 2d43f05b284c
- permissions
- -rw-r--r--
Removed the unused IS_RELEASE commented macro (we use HG_TAG for detecting releases for version strings instead)
/* Public Domain Curses */ #include <curspriv.h> RCSID("$Id: scanw.c,v 1.42 2008/07/14 12:22:13 wmcbrine Exp $") /*man-start************************************************************** Name: scanw Synopsis: int scanw(const char *fmt, ...); int wscanw(WINDOW *win, const char *fmt, ...); int mvscanw(int y, int x, const char *fmt, ...); int mvwscanw(WINDOW *win, int y, int x, const char *fmt, ...); int vwscanw(WINDOW *win, const char *fmt, va_list varglist); int vw_scanw(WINDOW *win, const char *fmt, va_list varglist); Description: These routines correspond to the standard C library's scanf() family. Each gets a string from the window via wgetnstr(), and uses the resulting line as input for the scan. Return Value: On successful completion, these functions return the number of items successfully matched. Otherwise they return ERR. Portability X/Open BSD SYS V scanw Y Y Y wscanw Y Y Y mvscanw Y Y Y mvwscanw Y Y Y vwscanw Y - 4.0 vw_scanw Y **man-end****************************************************************/ #include <string.h> #ifndef HAVE_VSSCANF # include <stdlib.h> # include <ctype.h> # include <limits.h> static int _pdc_vsscanf(const char *, const char *, va_list); # define vsscanf _pdc_vsscanf #endif int vwscanw(WINDOW *win, const char *fmt, va_list varglist) { char scanbuf[256]; PDC_LOG(("vwscanw() - called\n")); if (wgetnstr(win, scanbuf, 255) == ERR) return ERR; return vsscanf(scanbuf, fmt, varglist); } int scanw(const char *fmt, ...) { va_list args; int retval; PDC_LOG(("scanw() - called\n")); va_start(args, fmt); retval = vwscanw(stdscr, fmt, args); va_end(args); return retval; } int wscanw(WINDOW *win, const char *fmt, ...) { va_list args; int retval; PDC_LOG(("wscanw() - called\n")); va_start(args, fmt); retval = vwscanw(win, fmt, args); va_end(args); return retval; } int mvscanw(int y, int x, const char *fmt, ...) { va_list args; int retval; PDC_LOG(("mvscanw() - called\n")); if (move(y, x) == ERR) return ERR; va_start(args, fmt); retval = vwscanw(stdscr, fmt, args); va_end(args); return retval; } int mvwscanw(WINDOW *win, int y, int x, const char *fmt, ...) { va_list args; int retval; PDC_LOG(("mvscanw() - called\n")); if (wmove(win, y, x) == ERR) return ERR; va_start(args, fmt); retval = vwscanw(win, fmt, args); va_end(args); return retval; } int vw_scanw(WINDOW *win, const char *fmt, va_list varglist) { PDC_LOG(("vw_scanw() - called\n")); return vwscanw(win, fmt, varglist); } #ifndef HAVE_VSSCANF /* _pdc_vsscanf() - Internal routine to parse and format an input buffer. It scans a series of input fields; each field is formatted according to a supplied format string and the formatted input is stored in the variable number of addresses passed. Returns the number of input fields or EOF on error. Don't compile this unless required. Some compilers (at least Borland C++ 3.0) have to link with math libraries due to the use of floats. Based on vsscanf.c and input.c from emx 0.8f library source, Copyright (c) 1990-1992 by Eberhard Mattes, who has kindly agreed to its inclusion in PDCurses. */ #define WHITE(x) ((x) == ' ' || (x) == '\t' || (x) == '\n') #define NEXT(x) \ do { \ x = *buf++; \ if (!x) \ return (count ? count : EOF); \ ++chars; \ } while (0) #define UNGETC() \ do { \ --buf; --chars; \ } while (0) static int _pdc_vsscanf(const char *buf, const char *fmt, va_list arg_ptr) { int count, chars, c, width, radix, d, i; int *int_ptr; long *long_ptr; short *short_ptr; char *char_ptr; unsigned char f; char neg, assign, ok, size; long n; char map[256], end; double dx, dd, *dbl_ptr; float *flt_ptr; int exp; char eneg; count = 0; chars = 0; c = 0; while ((f = *fmt) != 0) { if (WHITE(f)) { do { ++fmt; f = *fmt; } while (WHITE(f)); do { c = *buf++; if (!c) { if (!f || count) return count; else return EOF; } else ++chars; } while (WHITE(c)); UNGETC(); } else if (f != '%') { NEXT(c); if (c != f) return count; ++fmt; } else { assign = TRUE; width = INT_MAX; char_ptr = NULL; ++fmt; if (*fmt == '*') { assign = FALSE; ++fmt; } if (isdigit(*fmt)) { width = 0; while (isdigit(*fmt)) width = width * 10 + (*fmt++ - '0'); if (!width) width = INT_MAX; } size = 0; if (*fmt == 'h' || *fmt == 'l') size = *fmt++; f = *fmt; switch (f) { case 'c': if (width == INT_MAX) width = 1; if (assign) char_ptr = va_arg(arg_ptr, char *); while (width > 0) { --width; NEXT(c); if (assign) { *char_ptr++ = (char) c; ++count; } } break; case '[': memset(map, 0, 256); end = 0; ++fmt; if (*fmt == '^') { ++fmt; end = 1; } i = 0; for (;;) { f = (unsigned char) *fmt; switch (f) { case 0: /* avoid skipping past 0 */ --fmt; NEXT(c); goto string; case ']': if (i > 0) { NEXT(c); goto string; } /* no break */ default: if (fmt[1] == '-' && fmt[2] && f < (unsigned char)fmt[2]) { memset(map + f, 1, (unsigned char)fmt[2] - f); fmt += 2; } else map[f] = 1; break; } ++fmt; ++i; } case 's': memset(map, 0, 256); map[' '] = 1; map['\n'] = 1; map['\r'] = 1; map['\t'] = 1; end = 1; do { NEXT(c); } while (WHITE(c)); string: if (assign) char_ptr = va_arg(arg_ptr, char *); while (width > 0 && map[(unsigned char) c] != end) { --width; if (assign) *char_ptr++ = (char) c; c = *buf++; if (!c) break; else ++chars; } if (assign) { *char_ptr = 0; ++count; } if (!c) return count; else UNGETC(); break; case 'f': case 'e': case 'E': case 'g': case 'G': neg = ok = FALSE; dx = 0.0; do { NEXT(c); } while (WHITE(c)); if (c == '+') { NEXT(c); --width; } else if (c == '-') { neg = TRUE; NEXT(c); --width; } while (width > 0 && isdigit(c)) { --width; dx = dx * 10.0 + (double) (c - '0'); ok = TRUE; c = *buf++; if (!c) break; else ++chars; } if (width > 0 && c == '.') { --width; dd = 10.0; NEXT(c); while (width > 0 && isdigit(c)) { --width; dx += (double) (c - '0') / dd; dd *= 10.0; ok = TRUE; c = *buf++; if (!c) break; else ++chars; } } if (!ok) return count; if (width > 0 && (c == 'e' || c == 'E')) { eneg = FALSE; exp = 0; NEXT(c); --width; if (width > 0 && c == '+') { NEXT(c); --width; } else if (width > 0 && c == '-') { eneg = TRUE; NEXT(c); --width; } if (!(width > 0 && isdigit(c))) { UNGETC(); return count; } while (width > 0 && isdigit(c)) { --width; exp = exp * 10 + (c - '0'); c = *buf++; if (!c) break; else ++chars; } if (eneg) exp = -exp; while (exp > 0) { dx *= 10.0; --exp; } while (exp < 0) { dx /= 10.0; ++exp; } } if (assign) { if (neg) dx = -dx; if (size == 'l') { dbl_ptr = va_arg(arg_ptr, double *); *dbl_ptr = dx; } else { flt_ptr = va_arg(arg_ptr, float *); *flt_ptr = (float)dx; } ++count; } if (!c) return count; else UNGETC(); break; case 'i': neg = FALSE; radix = 10; do { NEXT(c); } while (WHITE(c)); if (!(width > 0 && c == '0')) goto scan_complete_number; NEXT(c); --width; if (width > 0 && (c == 'x' || c == 'X')) { NEXT(c); radix = 16; --width; } else if (width > 0 && (c >= '0' && c <= '7')) radix = 8; goto scan_unsigned_number; case 'd': case 'u': case 'o': case 'x': case 'X': do { NEXT(c); } while (WHITE(c)); switch (f) { case 'o': radix = 8; break; case 'x': case 'X': radix = 16; break; default: radix = 10; break; } scan_complete_number: neg = FALSE; if (width > 0 && c == '+') { NEXT(c); --width; } else if (width > 0 && c == '-' && radix == 10) { neg = TRUE; NEXT(c); --width; } scan_unsigned_number: n = 0; ok = FALSE; while (width > 0) { --width; if (isdigit(c)) d = c - '0'; else if (isupper(c)) d = c - 'A' + 10; else if (islower(c)) d = c - 'a' + 10; else break; if (d < 0 || d >= radix) break; ok = TRUE; n = n * radix + d; c = *buf++; if (!c) break; else ++chars; } if (!ok) return count; if (assign) { if (neg) n = -n; switch (size) { case 'h': short_ptr = va_arg(arg_ptr, short *); *short_ptr = (short) n; break; case 'l': long_ptr = va_arg(arg_ptr, long *); *long_ptr = (long) n; break; default: int_ptr = va_arg(arg_ptr, int *); *int_ptr = (int) n; } ++count; } if (!c) return count; else UNGETC(); break; case 'n': if (assign) { int_ptr = va_arg(arg_ptr, int *); *int_ptr = chars; ++count; } break; default: if (!f) /* % at end of string */ return count; NEXT(c); if (c != f) return count; break; } ++fmt; } } return count; } #endif /* HAVE_VSSCANF */
