1 files changed, 117 insertions, 0 deletions
diff --git a/generator/ppmmake.c b/generator/ppmmake.c
new file mode 100644
index 00000000..eee32485
--- /dev/null
+++ b/generator/ppmmake.c
@@ -0,0 +1,117 @@
+/* ppmmake.c - create a pixmap of a specified color and size
+**
+** Copyright (C) 1991 by Jef Poskanzer.
+**
+** Permission to use, copy, modify, and distribute this software and its
+** documentation for any purpose and without fee is hereby granted, provided
+** that the above copyright notice appear in all copies and that both that
+** copyright notice and this permission notice appear in supporting
+** documentation.  This software is provided "as is" without express or
+** implied warranty.
+*/
+
+#include "pm_c_util.h"
+#include "mallocvar.h"
+#include "shhopt.h"
+#include "ppm.h"
+
+struct cmdlineInfo {
+    /* All the information the user supplied in the command line,
+       in a form easy for the program to use.
+    */
+    pixel color;
+    unsigned int cols;
+    unsigned int rows;
+    pixval maxval;
+};
+
+
+
+static void
+parseCommandLine(int argc, char ** argv,
+                 struct cmdlineInfo * const cmdlineP) {
+/*----------------------------------------------------------------------------
+  Convert program invocation arguments (argc,argv) into a format the 
+  program can use easily, struct cmdlineInfo.  Validate arguments along
+  the way and exit program with message if invalid.
+
+  Note that some string information we return as *cmdlineP is in the storage 
+  argv[] points to.
+-----------------------------------------------------------------------------*/
+    optEntry * option_def;
+        /* Instructions to OptParseOptions3 on how to parse our options.
+         */
+    optStruct3 opt;
+
+    unsigned int maxvalSpec;
+    unsigned int option_def_index;
+
+    MALLOCARRAY(option_def, 100);
+
+    option_def_index = 0;   /* incremented by OPTENTRY */
+    OPTENT3(0,   "maxval",    OPT_UINT, &cmdlineP->maxval, &maxvalSpec,    0);
+
+    opt.opt_table = option_def;
+    opt.short_allowed = false;  /* We have no short (old-fashioned) options */
+    opt.allowNegNum = false;  /* We have no parms that are negative numbers */
+
+    optParseOptions3(&argc, argv, opt, sizeof(opt), 0);
+        /* Uses and sets argc, argv, and some of *cmdlineP and others. */
+
+    if (!maxvalSpec)
+        cmdlineP->maxval = PPM_MAXMAXVAL;
+    else {
+        if (cmdlineP->maxval > PPM_OVERALLMAXVAL)
+            pm_error("The value you specified for -maxval (%u) is too big.  "
+                     "Max allowed is %u", cmdlineP->maxval, PPM_OVERALLMAXVAL);
+        
+        if (cmdlineP->maxval < 1)
+            pm_error("You cannot specify 0 for -maxval");
+    }    
+
+    if (argc-1 < 3)
+        pm_error("Need 3 arguments: color, width, height.");
+    else if (argc-1 > 3)
+        pm_error("Only 3 arguments allowed: color, width, height.  "
+                 "You specified %d", argc-1);
+    else {
+        cmdlineP->color = ppm_parsecolor(argv[1], cmdlineP->maxval);
+        cmdlineP->cols = atoi(argv[2]);
+        cmdlineP->rows = atoi(argv[3]);
+        if (cmdlineP->cols <= 0)
+            pm_error("width argument must be a positive number.  You "
+                     "specified '%s'", argv[2]);
+        if (cmdlineP->rows <= 0)
+            pm_error("height argument must be a positive number.  You "
+                     "specified '%s'", argv[3]);
+    }
+}
+
+
+
+int
+main(int argc, char *argv[]) {
+
+    struct cmdlineInfo cmdline;
+    pixel * pixrow;
+    unsigned int row;
+
+    ppm_init(&argc, argv);
+
+    parseCommandLine(argc, argv, &cmdline);
+
+    ppm_writeppminit(stdout, cmdline.cols, cmdline.rows, cmdline.maxval, 0);
+    pixrow = ppm_allocrow(cmdline.cols);
+
+    for (row = 0; row < cmdline.rows; ++row) {
+        unsigned int col;
+        for (col = 0; col < cmdline.cols; ++col)
+            pixrow[col] = cmdline.color;
+        ppm_writeppmrow(stdout, pixrow, cmdline.cols, cmdline.maxval, 0);
+	}
+
+    ppm_freerow(pixrow);
+    pm_close(stdout);
+
+    return 0;
+}