Permit to write input file or create output file from scratch - addrom - Simple tool for adding a rom entry to a Pandora's Box 3 list.dat
DIR Log
DIR Files
DIR Refs
DIR LICENSE
---
DIR commit be215e106234f8a2061cfedb8d4561c7281629fa
DIR parent ed830780cc8dd15c040cb5a6dd8e3f9d08ec16b6
HTML Author: Quentin Rameau <quinq@fifth.space>
Date: Tue, 10 Nov 2015 02:23:03 +0100
Permit to write input file or create output file from scratch
Diffstat:
addrom.c | 95 +++++++++++++++++++++----------
config.mk | 2 +-
2 files changed, 66 insertions(+), 31 deletions(-)
---
DIR diff --git a/addrom.c b/addrom.c
@@ -64,18 +64,35 @@ addrom(char *datfile, const Rom *rom)
}
static uint32_t
-setgamecount(uint64_t n)
+getbingamecount(uint64_t n)
{
return (n << 32 << 6) / 0x88888888;
}
static void
+setgamecount(char *buf, const uint32_t hexcount)
+{
+ *(uint32_t *)(buf) = hexcount;
+}
+
+static void
ereadinfile(char *datbuf, const ssize_t size, FILE *infile)
{
if (fread(datbuf, 1, size, infile) != size)
die("Couldn't read %zu bytes of input file %s\n", size, in);
}
+static void *
+ecalloc(const ssize_t size)
+{
+ char *buf;
+
+ if (!(buf = calloc(size, 1)))
+ die("Can't allocate enough memory for buffer\n");
+
+ return buf;
+}
+
static void
usage(void)
{
@@ -130,56 +147,74 @@ main(int argc, char *argv[])
break;
} ARGEND
- if (!in || !out || !rom.romname)
+ if (!(in || out) || !rom.romname)
usage();
- if (access(out, F_OK) != -1)
+ if (out && access(out, F_OK) != -1)
die("Output file %s exists and will not be overwritten\n",
out);
- if ((infd = open(in, O_RDONLY)) == -1)
- die("Can't open input file %s\n", in);
+ /* create and populate buffer */
+ if (in) { /* from existing file */
+ if ((infd = open(in, out ? O_RDONLY : O_RDWR)) == -1)
+ die("Can't open input file %s\n", in);
- if (fstat(infd, &st) == -1 || !S_ISREG(st.st_mode))
- die("File %s is not a regular file\n", in);
+ if (fstat(infd, &st) == -1 || !S_ISREG(st.st_mode))
+ die("Input file %s is not a regular file\n", in);
- if ((infilesize = st.st_size) < HEADERSZ)
- die("Corrupted input file %s\n", in);
+ if ((infilesize = st.st_size) < HEADERSZ)
+ die("Corrupted input file %s\n", in);
- if (!(infile = fdopen(infd, "r")))
- die("Can't open input file %s\n", in);
+ if (!(infile = fdopen(infd, out ? "r" : "r+")))
+ die("Can't open input file %s\n", in);
- outbufsize = infilesize + ENTRYSZ;
+ outbufsize = infilesize + ENTRYSZ;
- if (!(outbuf = calloc(outbufsize, 1)))
- die("Can't allocate enough memory for reading input file\n");
+ outbuf = ecalloc(outbufsize);
- if (place == 0 || place * ENTRYSZ + HEADERSZ > infilesize)
- offset = infilesize;
- else
- offset = HEADERSZ + (place - 1) * ENTRYSZ;
+ if (place == 0 || place * ENTRYSZ + HEADERSZ > infilesize)
+ offset = infilesize;
+ else
+ offset = HEADERSZ + (place - 1) * ENTRYSZ;
- ereadinfile(outbuf, offset, infile);
+ ereadinfile(outbuf, offset, infile);
- *(uint32_t *)(outbuf + HEADERSZSZ) = setgamecount(
- (infilesize - HEADERSZ) / ENTRYSZ + 1);
+ setgamecount(outbuf + HEADERSZSZ,
+ getbingamecount((infilesize - HEADERSZ) / ENTRYSZ + 1));
- addrom(outbuf + offset, &rom);
+ addrom(outbuf + offset, &rom);
- ereadinfile(outbuf + offset + ENTRYSZ, infilesize - offset, infile);
+ ereadinfile(outbuf + offset + ENTRYSZ, infilesize - offset,
+ infile);
+ } else { /* from scratch, position is ignored */
+ outbufsize = HEADERSZ + ENTRYSZ;
- if (fclose(infile) == EOF)
- fprintf(stderr, "There was an error while closing input file "
- "%s\n", in);
+ outbuf = ecalloc(outbufsize);
+
+ *(uint32_t *)(outbuf) = HEADERSZ;
+
+ setgamecount(outbuf + HEADERSZSZ, getbingamecount(1));
+
+ offset = HEADERSZ;
- if (!(outfile = fopen(out, "w")))
+ addrom(outbuf + offset, &rom);
+ }
+
+ /* write out buffer */
+ if (out && !(outfile = fopen(out, "w")))
die("Can't open output file %s\n", out);
+ else if (!out && fseeko(infile, 0, SEEK_SET) == -1)
+ die("Couldn't seek input file %s\n", in);
- if (fwrite(outbuf, 1, outbufsize, outfile) !=
+ if (fwrite(outbuf, 1, outbufsize, out ? outfile : infile) !=
outbufsize)
- die("Couldn't write all data to output file %s\n", out);
+ die("Couldn't write all data to file %s\n", out ? out : in);
+
+ if (in && fclose(infile) == EOF)
+ fprintf(stderr, "There was an error while closing input file "
+ "%s\n", in);
- if (fclose(outfile) == EOF)
+ if (out && fclose(outfile) == EOF)
fprintf(stderr, "There was an error while closing output file "
"%s\n", out);
DIR diff --git a/config.mk b/config.mk
@@ -7,7 +7,7 @@ INCS = -I. -I/usr/include
LIBS = -L/usr/lib
# flags
-CPPFLAGS += -D_POSIX_SOURCE
+CPPFLAGS += -D_POSIX_SOURCE -D_XOPEN_SOURCE=600
CFLAGS += -std=c99 -pedantic -Wall -Os -s ${INCS} ${CPPFLAGS}
LDFLAGS += -s ${LIBS}