[6model/c] initial Configure and Makefile machinery

c/Configure.sh

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+#!/bin/sh
+cc -Wall -o tools/build/Configure tools/build/Configure.c
+tools/build/Configure tools/build/Makefile.in Makefile

c/tools/build/Configure.c

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+/* Configure.c */
+/* Compiled and run by 6model/c/Configure.(sh|bat) */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define LINEBUFFERSIZE 128
+
+
+/* slurp */
+/* Read an entire file into a string allocated on the heap */
+char *
+slurp(char * filename)
+{
+    FILE * infile;
+    int linesize, textsize = 0;
+    char linebuffer[LINEBUFFERSIZE];
+    char * filetext = NULL;
+
+    infile = fopen(filename, "r");
+    while (fgets(linebuffer, LINEBUFFERSIZE, infile)) {
+        linesize = strlen(linebuffer);
+        filetext = textsize
+            ? realloc(filetext, textsize+linesize+1)
+            : malloc(linesize+1);     /* +1 for '\0' at end of string */
+        strcpy(filetext+textsize, linebuffer);
+        textsize += linesize;
+    }
+    return filetext;
+}
+
+
+/* subst */
+/* Perform a global search and replace on a string */
+void
+subst(char ** text, char * search, char * replace)
+{
+    int textindex, searchlength, replacelength, foundcount = 0;
+    int pass = 1, textlength, lengthdifference;
+    char * textend, * found;
+    textlength       = strlen(* text);
+    searchlength     = strlen(search);
+    replacelength    = strlen(replace);
+    lengthdifference = replacelength - searchlength;
+    textend          = (* text) + textlength; /* point to '\0' at end */
+    /* To reallocate the text memory only once, if replace is longer */
+    /* than search, first do a pass to count matches and resize the */
+    /* text. */
+    /* If the text will not become longer, skip the search pass. */
+    if (lengthdifference <= 0) {
+        pass = 2;  /* no need to count before replacing */
+    }
+    while (pass <= 2) {
+        textindex = 0;
+        while ( (found=strstr((* text)+textindex, search)) != NULL) {
+            switch (pass) {
+                case 1:
+                    /* first pass is only for counting */
+                    ++ foundcount;
+                    textindex = found - (* text) + searchlength;
+                    break;
+                case 2:
+                    /* do the replacement */
+                    if (lengthdifference)
+                        memmove(found+replacelength, found+searchlength,
+                                    (textend-found)-searchlength+1);
+                    memcpy(found,replace,replacelength);
+                    textlength += lengthdifference;
+                    textend    += lengthdifference;
+                    textindex = (found - (* text)) + replacelength;
+                    break;
+            }
+        }
+        if ((pass==1) && foundcount) {
+            /* The text will become longer, so re-allocate once only */
+            * text = realloc(* text, textlength + 1
+                                     + foundcount * lengthdifference );
+        }
+        ++pass;
+    }
+    /* Check whether the text should now be shorter, and make it so */
+    if (lengthdifference < 0 && foundcount) {
+        * text = realloc(* text, textlength + 1
+                                 + foundcount * lengthdifference );
+    }
+}
+
+
+/* squirt */
+/* Write a string to a file */
+void
+squirt(char * text, char * filename)
+{
+    FILE * outfile;
+    outfile = fopen(filename, "w");
+    fputs(text, outfile);
+    fclose(outfile);
+}
+
+
+/* main */
+int
+main(int argc, char * argv[])
+{
+    char * makefiletext;
+    makefiletext = slurp(argv[1]);
+    subst(&makefiletext, "# Makefile.in",    "# Makefile");
+    subst(&makefiletext, "This is the file", "This is NOT the file");
+    squirt(makefiletext, argv[2]);
+    free(makefiletext);
+    return 0;
+}

c/tools/build/Makefile.in

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+# Makefile.in for 6model/c
+# This is the file to edit and commit changes.  Depending on the
+# operating system, use 6model/c/Configure.sh or 6model/c/Configure.bat
+# to compile and run 6model/c/tools/build/Configure.c which reads from
+# 6model/c/tools/build/Makefile.in and generates 6model/c/Makefile.
+
+# Targets that do not produce files (tells make not to waste time
+# checking that such files exist).
+.PHONY: clean test test01 test02
+
+t/01-toolchain/01a-cc.exe: t/01-toolchain/01a-cc.c
+	cc -ldl -o t/01-toolchain/01a-cc.exe t/01-toolchain/01a-cc.c
+
+t/01-toolchain/01b-icu.exe: t/01-toolchain/01b-icu.c
+	cc -ldl -o t/01-toolchain/01b-icu.exe t/01-toolchain/01b-icu.c
+
+t/02-components/02a-hashtable.exe: t/02-components/02a-hashtable.c
+	cc -o t/02-components/02a-hashtable.exe t/02-components/02a-hashtable.c
+
+test01: t/01-toolchain/01a-cc.exe t/01-toolchain/01b-icu.exe
+	prove -e '' --ext '.exe' t/01-toolchain
+
+test02: t/02-components/02a-hashtable.exe
+	prove -e '' --ext '.exe' t/02-components
+
+test: test01 test02
+
+clean:
+	perl -MExtUtils::Command -e rm_rf *.exe *~
+
+realclean: clean
+	perl -MExtUtils::Command -e rm_f Makefile
+
+help:
+	@echo 'In this 6model/c directory you can make the following targets:'
+	@echo 'test01 - tests the toolchain (C compiler, ICU etc)'
+	@echo 'help - you already found this'