ref: a50be99567d1b6018a0a1f019a51c0bc7a0f11ff
dir: /libmemdraw/openmemsubfont.c/
#include <u.h> #include <libc.h> #include <draw.h> #include <memdraw.h> Memsubfont* openmemsubfont(char *name) { Memsubfont *sf; Memimage *i; Fontchar *fc; int fd, n; char hdr[3*12+4+1]; uchar *p; fd = open(name, OREAD); if(fd < 0) return nil; p = nil; i = readmemimage(fd); if(i == nil) goto Err; if(readn(fd, hdr, 3*12) != 3*12){ werrstr("openmemsubfont: header read error: %r"); goto Err; } n = atoi(hdr); if(n <= 0 || n > 0x7fff){ werrstr("openmemsubfont: bad fontchar count %d", n); goto Err; } p = malloc(6*(n+1)); if(p == nil) goto Err; if(readn(fd, p, 6*(n+1)) != 6*(n+1)){ werrstr("openmemsubfont: fontchar read error: %r"); goto Err; } fc = malloc(sizeof(Fontchar)*(n+1)); if(fc == nil) goto Err; _unpackinfo(fc, p, n); sf = allocmemsubfont(name, n, atoi(hdr+12), atoi(hdr+24), fc, i); if(sf == nil){ free(fc); goto Err; } close(fd); free(p); return sf; Err: close(fd); free(p); freememimage(i); return nil; }