Fix icons and speed up building

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 180 insertions, 0 deletions

diff --git a/conv.c b/conv.c
new file mode 100644
index 0000000..7c5480e
--- /dev/null
+++ b/conv.c
@@ -0,0 +1,180 @@
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+static char *argv0;
+
+
+static int
+single(int argc, char *argv[])
+{
+	char size[10], target[4096], source[4096];
+	char *p;
+	ssize_t r;
+	int fd;
+
+	p = strchr(argv[0], 'x');
+	if (!p)
+		return 1;
+	*p = '\0';
+	stpcpy(size, argv[0]);
+	*p = 'x';
+
+	p = strchr(p, '/');
+	if (!p)
+		return 1;
+	p = stpcpy(stpcpy(source, "scalable"), p);
+	if (strcmp(&p[-4], ".png"))
+		return 1;
+	stpcpy(&p[-4], ".svg");
+
+	for (p = argv[0]; (p = strchr(p, '/')); p++) {
+		*p = '\0';
+		if (mkdir(argv[0], 0777) && errno != EEXIST) {
+			fprintf(stderr, "%s: mkdir %s 0777: %s\n", argv0, argv[0], strerror(errno));
+			return 1;
+		}
+		*p = '/';
+	}
+
+	r = readlink(source, target, sizeof(target) - 1);
+	if (r >= 0)
+		target[r] = 0;
+	if (r >= 0 && (r >= sizeof(target) - 1 || r < 4 || strcmp(&target[r - 4], ".svg"))) {
+		return 1;
+	} else if (r < 0 && errno == EINVAL) {
+		fd = open(argv[0], O_WRONLY | O_CREAT | O_TRUNC, 0666);
+		if (fd < 0) {
+			fprintf(stderr, "%s: open %s O_WRONLY|O_CREAT|O_TRUNC 0666: %s\n", argv0, argv[0], strerror(errno));
+			return 1;
+		}
+		if (fd != STDOUT_FILENO) {
+			if (dup2(fd, STDOUT_FILENO) != STDOUT_FILENO)
+				fprintf(stderr, "%s: dup2 %i 1: %s\n", argv0, fd, strerror(errno));
+			close(fd);
+		}
+		execlp("rsvg-convert", "rsvg-convert", "-w", size, "-h", size, "-f", "png", source, NULL);
+		fprintf(stderr, "%s: execvp rsvg-convert: %s\n", argv0, strerror(errno));
+		return 1;
+	} else if (r < 0) {
+		fprintf(stderr, "%s: readlink %s: %s\n", argv0, source, strerror(errno));
+		return 1;
+	} else {
+		stpcpy(&target[r - 4], ".png");
+		if (symlink(target, argv[0])) {
+			if (errno == EEXIST) {
+				unlink(argv[0]);
+				if (!symlink(target, argv[0]))
+					return 0;
+			}
+			fprintf(stderr, "%s: symlink %s %s: %s\n", argv0, target, argv[0], strerror(errno));
+			return 1;
+		}
+		return 0;
+	}
+}
+
+
+static int
+multi(int argc, char *argv[])
+{
+	char *source, output[4096], target[4096];
+	char *p, *q;
+	pid_t pid;
+	int status, fd, i;
+	ssize_t r;
+
+	source = *argv++, argc--;
+
+	q = strchr(source, '/');
+	if (!q)
+		return 1;
+
+	for (i = 0; i < argc; i++) {
+		stpcpy(stpcpy(stpcpy(stpcpy(output, argv[i]), "x"), argv[i]), q);
+		for (p = output; (p = strchr(p, '/')); p++) {
+			*p = '\0';
+			if (mkdir(output, 0777) && errno != EEXIST) {
+				fprintf(stderr, "%s: mkdir %s 0777: %s\n", argv0, output, strerror(errno));
+				return 1;
+			}
+			*p = '/';
+		}
+	}
+
+	r = readlink(source, target, sizeof(target) - 1);
+	if (r >= 0)
+		target[r] = 0;
+	if (r >= 0 && (r >= sizeof(target) - 1 || r < 4 || strcmp(&target[r - 4], ".svg"))) {
+		return 1;
+	} else if (r < 0 && errno == EINVAL) {
+		p = stpcpy(stpcpy(stpcpy(stpcpy(output, argv[0]), "x"), argv[0]), q);
+		stpcpy(&p[-4], ".png");
+		for (; *argv; argv++, argc--) {
+			pid = argc == 1 ? 0 : fork();
+			if (pid == -1) {
+				fprintf(stderr, "%s: fork: %s\n", argv0, strerror(errno));
+				return 1;
+			}
+			if (pid) {
+				p = stpcpy(stpcpy(stpcpy(stpcpy(output, argv[1]), "x"), argv[1]), q);
+				stpcpy(&p[-4], ".png");
+				if (waitpid(pid, &status, 0) != pid) {
+					fprintf(stderr, "%s: waitpid rsvg-convert: %s\n", argv0, strerror(errno));
+					return 1;
+				}
+				if (status)
+					return 1;
+				continue;
+			}
+			fd = open(output, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+			if (fd < 0) {
+				fprintf(stderr, "%s: open %s O_WRONLY|O_CREAT|O_TRUNC 0666: %s\n", argv0, output, strerror(errno));
+				return 1;
+			}
+			if (fd != STDOUT_FILENO) {
+				if (dup2(fd, STDOUT_FILENO) != STDOUT_FILENO)
+					fprintf(stderr, "%s: dup2 %i 1: %s\n", argv0, fd, strerror(errno));
+				close(fd);
+			}
+			execlp("rsvg-convert", "rsvg-convert", "-w", *argv, "-h", *argv, "-f", "png", source, NULL);
+			fprintf(stderr, "%s: execvp rsvg-convert: %s\n", argv0, strerror(errno));
+			return 1;
+		}
+	} else if (r < 0) {
+		fprintf(stderr, "%s: readlink %s: %s\n", argv0, source, strerror(errno));
+		return 1;
+	} else {
+		stpcpy(&target[r - 4], ".png");
+		for (; *argv; argv++) {
+			p = stpcpy(stpcpy(stpcpy(stpcpy(output, *argv), "x"), *argv), q);
+			stpcpy(&p[-4], ".png");
+			if (symlink(target, output)) {
+				if (errno == EEXIST) {
+					unlink(output);
+					if (!symlink(target, output))
+						continue;
+				}
+				fprintf(stderr, "%s: symlink %s %s: %s\n", argv0, target, output, strerror(errno));
+				return 1;
+			}
+		}
+		return 0;
+	}
+}
+
+
+int
+main(int argc, char *argv[])
+{
+	argv0 = *argv++, argc--;
+	if (argc == 1)
+		return single(argc, argv);
+	if (argc > 1)
+		return multi(argc, argv);
+	return 1;
+}