diff options
Diffstat (limited to 'converter/pbm/pbmto4425.c')
| -rw-r--r-- | converter/pbm/pbmto4425.c | 219 |
1 files changed, 98 insertions, 121 deletions
diff --git a/converter/pbm/pbmto4425.c b/converter/pbm/pbmto4425.c index 1d97ac6a..f18b2e5a 100644 --- a/converter/pbm/pbmto4425.c +++ b/converter/pbm/pbmto4425.c @@ -1,178 +1,155 @@ +#include <assert.h> #include <string.h> #include "nstring.h" +#include "mallocvar.h" #include "pbm.h" -static char bit_table[2][3] = { -{1, 4, 0x10}, -{2, 8, 0x40} +static char const bit_table[2][3] = { + {1, 4, 0x10}, + {2, 8, 0x40} }; -static int vmap_width; -static int vmap_height; +static unsigned int const vmapWidth = 132; +static unsigned int const vmapHeight = 23; -static int xres; -static int yres; - -static char *vmap; static void -init_map() -{ - int x, y; +initMap(char * const vmap) { + unsigned int col; - for(x = 0; x < vmap_width; ++x) - { - for(y = 0; y < vmap_height; ++y) - { - vmap[y*(vmap_width) + x] = 0x20; - } + for (col = 0; col < vmapWidth; ++col) { + unsigned int row; + + for (row = 0; row < vmapHeight; ++row) + vmap[row * vmapWidth + col] = ' '; } } static void -set_vmap(x, y) - int x, y; -{ - int ix, iy; +setVmap(char * const vmap, + unsigned int const x, + unsigned int const y) { + + unsigned int const ix = x/2; + unsigned int const iy = y/3; - ix = x/2; - iy = y/3; + assert(ix < vmapWidth); + assert(iy < vmapHeight); - vmap[iy*(vmap_width) + ix] |= bit_table[x % 2][y % 3]; + vmap[iy * vmapWidth + ix] |= bit_table[x % 2][y % 3]; } static void -fill_map(pbmfp) - FILE *pbmfp; -{ - bit **pbm_image; +fillMap(FILE * const pbmFileP, + char * const vmap) { + + unsigned int const xres = vmapWidth * 2; + unsigned int const yres = vmapHeight * 3; + + bit ** pbmImage; int cols; int rows; - int x; - int y; - - pbm_image = pbm_readpbm(pbmfp, &cols, &rows); - for(y = 0; y < rows && y < yres; ++y) - { - for(x = 0; x < cols && x < xres; ++x) - { - if(pbm_image[y][x] == PBM_WHITE) - { - set_vmap(x, y); - } + unsigned int row; + + pbmImage = pbm_readpbm(pbmFileP, &cols, &rows); + + for (row = 0; row < rows && row < yres; ++row) { + unsigned int col; + + for (col = 0; col < cols && col < xres; ++col) { + if (pbmImage[row][col] == PBM_WHITE) + setVmap(vmap, col, row); } } } + static void -print_map() -{ - int x, y; - int last_byte; - -#ifdef BUFFERED - char *iobuf; - iobuf = (char *)malloc(BUFSIZ); - if(iobuf == NULL) - { - pm_message( "Can't allocate space for I/O buffer. " - "Using unbuffered I/O...\n" ); - setbuf(stdout, NULL); - } - else - { - setbuf(stdout, iobuf); - } -#endif - - fputs("\033[H\033[J", stdout); /* clear screen */ - fputs("\033[?3h", stdout); /* 132 column mode */ - fputs("\033)}\016", stdout); /* mosaic mode */ - - for(y = 0; y < vmap_height; ++y) - { - for(last_byte = vmap_width - 1; - last_byte >= 0 - && vmap[y * vmap_width + last_byte] == 0x20; - --last_byte) +printMap(char * const vmap, + FILE * const ofP) { + + unsigned int row; + + fputs("\033[H\033[J", ofP); /* clear screen */ + fputs("\033[?3h", ofP); /* 132 column mode */ + fputs("\033)}\016", ofP); /* mosaic mode */ + + for (row = 0; row < vmapHeight; ++row) { + unsigned int endCol; + /* Column number just past the non-space data in the row; + (i.e. spaces on the right are padding; not data + */ + unsigned int col; + + for (endCol = vmapWidth; + endCol > 0 && vmap[row * vmapWidth + (endCol-1)] == ' '; + --endCol) ; - for(x = 0; x <= last_byte; ++x) - { - fputc(vmap[y*(vmap_width) + x], stdout); - } - fputc('\n', stdout); + for (col = 0; col < endCol; ++col) + fputc(vmap[row * vmapWidth + col], ofP); + + fputc('\n', ofP); } - fputs("\033(B\017", stdout); + fputs("\033(B\017", ofP); } int -main(int argc, char * argv[]) { - int argn; - const char *pbmfile; - FILE *pbmfp; - const char *usage="[pbmfile]"; - - pbm_init( &argc, argv ); - for(argn = 1; - argn < argc && argv[argn][0] == '-' && strlen(argv[argn]) > 1; - ++argn) - { - pm_usage(usage); - } +main(int argc, const char ** argv) { - if(argn >= argc) - { - pbmfile = "-"; - } - else if(argc - argn != 1) - { - pm_usage(usage); - } - else - { - pbmfile = argv[argn]; - } + unsigned int argn; + const char * inputFileNm; + FILE * ifP; + + char * vmap; /* malloced */ + + pm_proginit(&argc, argv); - if(streq(pbmfile, "-")) - { - pbmfp = stdin; + for (argn = 1; + argn < argc && argv[argn][0] == '-' && strlen(argv[argn]) > 1; + ++argn) { + pm_error("Unrecognized option '%s'", argv[argn]); } - else - { - pbmfp = pm_openr( argv[argn] ); + + if (argn >= argc) { + inputFileNm = "-"; + } else if(argc - argn != 1) { + pm_error("Too many arguments. At most one argument is allowed: " + "Name of the input file"); + } else { + inputFileNm = argv[argn]; } - vmap_width = 132; - vmap_height = 23; + ifP = pm_openr(inputFileNm); + + assert(vmapWidth < UINT_MAX/vmapHeight); + + MALLOCARRAY(vmap, vmapWidth * vmapHeight); + if (!vmap) + pm_error("Cannot allocate memory for %u x %u pixels", + vmapWidth, vmapHeight); - xres = vmap_width * 2; - yres = vmap_height * 3; + initMap(vmap); + fillMap(ifP, vmap); + printMap(vmap, stdout); - vmap = malloc(vmap_width * vmap_height * sizeof(char)); - if(vmap == NULL) - { - pm_error( "Cannot allocate memory" ); - } + free(vmap); - init_map(); - fill_map(pbmfp); - print_map(); /* If the program failed, it previously aborted with nonzero completion code, via various function calls. */ - return 0; + return 0; } |