reactos/sdk/tools/mkconfig.c

140 lines
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#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#ifndef max
#define max(a, b) ((a) > (b) ? (a) : (b))
#endif
int
write_if_change(char* outbuf, char* filename)
{
FILE* out;
unsigned int end;
char* cmpbuf;
unsigned int stat;
out = fopen(filename, "rb");
if (out == NULL)
{
out = fopen(filename, "wb");
if (out == NULL)
{
fprintf(stderr, "Unable to create output file\n");
return(1);
}
fputs(outbuf, out);
fclose(out);
return(0);
}
fseek(out, 0, SEEK_END);
end = ftell(out);
cmpbuf = malloc(end);
if (cmpbuf == NULL)
{
fprintf(stderr, "Out of memory\n");
fclose(out);
return(1);
}
fseek(out, 0, SEEK_SET);
stat = fread(cmpbuf, 1, end, out);
if (stat != end)
{
fprintf(stderr, "Failed to read data\n");
fclose(out);
free(cmpbuf);
return(1);
}
if (end == strlen(outbuf) && memcmp(cmpbuf, outbuf, end) == 0)
{
fclose(out);
free(cmpbuf);
return(0);
}
fclose(out);
free(cmpbuf);
out = fopen(filename, "wb");
if (out == NULL)
{
fprintf(stderr, "Unable to create output file\n");
return(1);
}
stat = fwrite(outbuf, 1, strlen(outbuf), out);
if (strlen(outbuf) != stat)
{
fprintf(stderr, "Unable to write output file\n");
fclose(out);
return(1);
}
fclose(out);
return(0);
}
int
main(int argc, char* argv[])
{
int include_tests;
unsigned int i;
char* outbuf;
char* s;
char config[512];
if (argc == 1)
{
fprintf(stderr, "Not enough arguments\n");
return(1);
}
outbuf = malloc(256 * 1024);
if (outbuf == NULL)
{
fprintf(stderr, "Out of memory 1\n");
return(1);
}
s = outbuf;
s = s + sprintf(s, "/* Automatically generated, ");
s = s + sprintf(s, "Edit the Makefile to change configuration */\n");
s = s + sprintf(s, "#ifndef __INCLUDE_CONFIG_H\n");
s = s + sprintf(s, "#define __INCLUDE_CONFIG_H\n");
strcpy(config, "");
include_tests = 0;
for (i = 2; i < argc; i++)
{
if (strcmp(argv[i], "REGTESTS") == 0)
{
include_tests = 1;
}
else
{
s = s + sprintf(s, "#ifndef %s\n", argv[i]);
s = s + sprintf(s, "#define %s\n", argv[i]);
s = s + sprintf(s, "#endif /* %s */\n", argv[i]);
}
strcat(config, argv[i]);
if (i != (argc - 1))
{
strcat(config, " ");
}
}
if (include_tests)
{
s = s + sprintf(s, "#ifndef __ASM__\n");
s = s + sprintf(s, "extern void PrepareTests();\n");
s = s + sprintf(s, "#define PREPARE_TESTS PrepareTests();\n");
s = s + sprintf(s, "#endif /* __ASM__ */\n");
}
else
{
s = s + sprintf(s, "#define PREPARE_TESTS\n");
}
s = s + sprintf(s, "#define CONFIG \"%s\"\n", config);
s = s + sprintf(s, "#endif /* __INCLUDE_CONFIG_H */\n");
return(write_if_change(outbuf, argv[1]));
}