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authorRoberto E. Vargas Caballero <k0ga@shike2.com>2012-09-12 21:25:35 +0200
committerRoberto E. Vargas Caballero <k0ga@shike2.com>2012-09-12 21:25:35 +0200
commitadc463157490fa4c15cf3daf3fc9780e8d8abcb1 (patch)
treed33460dc4e682f5faf63df222ddd7c7a8ccaeb4e
parent91d32161fc1d16f5b0235f0ffe7b56b4c9c07e45 (diff)
downloadst-adc463157490fa4c15cf3daf3fc9780e8d8abcb1.tar.gz
st-adc463157490fa4c15cf3daf3fc9780e8d8abcb1.tar.bz2
Add xmalloc and xrealloc wrappers
If malloc or realloc fail they return NULL. Theorically this condition should be tested in the code, but it's a strange condition today (basically if this is hapenning thenyou have a big problem), and even Linux never returns NULL in the default configuration (only if the process don't have room in the space address, something a bit impossible in the case of st). But stis enough small for being executed in low resources computers where this can be a real problem. So the easy way is creating a wrappers function for them and call to die in case of error. --- st.c | 44 +++++++++++++++++++++++++++++++------------- 1 file changed, 31 insertions(+), 13 deletions(-)
-rw-r--r--st.c44
1 files changed, 31 insertions, 13 deletions
diff --git a/st.c b/st.c
index 75c6cea..8741145 100644
--- a/st.c
+++ b/st.c
@@ -326,6 +326,9 @@ static int utf8encode(long *, char *);
static int utf8size(char *);
static int isfullutf8(char *, int);
+static void *xmalloc(size_t);
+static void *xrealloc(void *, size_t);
+
static void (*handler[LASTEvent])(XEvent *) = {
[KeyPress] = kpress,
[ClientMessage] = cmessage,
@@ -359,6 +362,21 @@ static char *opt_title = NULL;
static char *opt_embed = NULL;
static char *opt_class = NULL;
+void *
+xmalloc(size_t len) {
+ void *p = malloc(len);
+ if(!p)
+ die("Out of memory");
+ return p;
+}
+
+void *
+xrealloc(void *p, size_t len) {
+ if((p = realloc(p, len)) == NULL)
+ die("Out of memory");
+ return p;
+}
+
int
utf8decode(char *s, long *u) {
uchar c;
@@ -565,7 +583,7 @@ selcopy(void) {
else {
bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
- ptr = str = malloc(bufsize);
+ ptr = str = xmalloc(bufsize);
/* append every set & selected glyph to the selection */
for(y = 0; y < term.row; y++) {
@@ -918,14 +936,14 @@ void
tnew(int col, int row) {
/* set screen size */
term.row = row, term.col = col;
- term.line = malloc(term.row * sizeof(Line));
- term.alt = malloc(term.row * sizeof(Line));
- term.dirty = malloc(term.row * sizeof(*term.dirty));
- term.tabs = malloc(term.col * sizeof(*term.tabs));
+ term.line = xmalloc(term.row * sizeof(Line));
+ term.alt = xmalloc(term.row * sizeof(Line));
+ term.dirty = xmalloc(term.row * sizeof(*term.dirty));
+ term.tabs = xmalloc(term.col * sizeof(*term.tabs));
for(row = 0; row < term.row; row++) {
- term.line[row] = malloc(term.col * sizeof(Glyph));
- term.alt [row] = malloc(term.col * sizeof(Glyph));
+ term.line[row] = xmalloc(term.col * sizeof(Glyph));
+ term.alt [row] = xmalloc(term.col * sizeof(Glyph));
term.dirty[row] = 0;
}
memset(term.tabs, 0, term.col * sizeof(*term.tabs));
@@ -1761,16 +1779,16 @@ tresize(int col, int row) {
}
/* resize to new height */
- term.line = realloc(term.line, row * sizeof(Line));
- term.alt = realloc(term.alt, row * sizeof(Line));
- term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
- term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
+ term.line = xrealloc(term.line, row * sizeof(Line));
+ term.alt = xrealloc(term.alt, row * sizeof(Line));
+ term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
+ term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
/* resize each row to new width, zero-pad if needed */
for(i = 0; i < minrow; i++) {
term.dirty[i] = 1;
- term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
- term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
+ term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
+ term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
for(x = mincol; x < col; x++) {
term.line[i][x].state = 0;
term.alt[i][x].state = 0;