Clang Warnings

[a-p-jo]

kilo.c:71:8: warning: padding size of 'struct editorSyntax' with 4 bytes to alignment boundary [-Wpadded]
struct editorSyntax {
       ^
kilo.c:106:11: warning: padding struct 'struct editorConfig' with 4 bytes to align 'filename' [-Wpadded]
    char *filename; /* Currently open filename */

kilo.c:85:11: warning: padding struct 'struct erow' with 4 bytes to align 'chars' [-Wpadded]
    char *chars;        /* Row content. */
          ^
kilo.c:81:16: warning: padding size of 'struct erow' with 4 bytes to alignment boundary [-Wpadded]
typedef struct erow {

kilo.c:229:20: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
    raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
                ~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kilo.c:231:20: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
    raw.c_oflag &= ~(OPOST);

kilo.c:256:21: warning: implicit conversion loses integer precision: 'ssize_t' (aka 'long') to 'int' [-Wshorten-64-to-32]
    while ((nread = read(fd,&c,1)) == 0);

kilo.c:383:36: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
    row->hl = realloc(row->hl,row->rsize);
              ~~~~~~~         ~~~~~^~~~~
kilo.c:485:28: warning: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Wshorten-64-to-32]
                int klen = strlen(keywords[j]);

kilo.c:489:43: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
                if (!memcmp(p,keywords[j],klen) &&

kilo.c:541:26: warning: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Wshorten-64-to-32]
            int patlen = strlen(s->filematch[i]);
                ~~~~~~   ^~~~~~~~~~~~~~~~~~~~~~~
kilo.c:573:31: warning: implicit conversion changes signedness: 'int' to 'unsigned int' [-Wsign-conversion]
    row->render = malloc(row->size + tabs*8 + nonprint*9 + 1);

kilo.c:594:50: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
    E.row = realloc(E.row,sizeof(erow)*(E.numrows+1));
                                      ~ ~~~~~~~~~^~
kilo.c:596:64: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
        memmove(E.row+at+1,E.row+at,sizeof(E.row[0])*(E.numrows-at));

kilo.c:599:22: warning: implicit conversion loses integer precision: 'size_t' (aka 'unsigned long') to 'int' [-Wshorten-64-to-32]
    E.row[at].size = len;

kilo.c:627:63: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
    memmove(E.row+at,E.row+at+1,sizeof(E.row[0])*(E.numrows-at-1));

kilo.c:648:22: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
    p = buf = malloc(totlen);

kilo.c:667:57: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
        row->chars = realloc(row->chars,row->size+padlen+2);
                     ~~~~~~~            ~~~~~~~~~~~~~~~~^~
kilo.c:674:50: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
        row->chars = realloc(row->chars,row->size+2);
                     ~~~~~~~            ~~~~~~~~~^~
kilo.c:678:22: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
    row->chars[at] = c;

kilo.c:685:42: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
    row->chars = realloc(row->chars,row->size+len+1);

kilo.c:744:63: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
        editorInsertRow(filerow+1,row->chars+filecol,row->size-filecol);

kilo.c:771:65: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
        editorRowAppendString(&E.row[filerow-1],row->chars,row->size);

kilo.c:821:40: warning: implicit conversion changes signedness: 'ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
        editorInsertRow(E.numrows,line,linelen);
        ~~~~~~~~~~~~~~~                ^~~~~~~
kilo.c:839:22: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
    if (write(fd,buf,len) != len) goto writeerr;
        ~~~~~        ^~~
kilo.c:868:38: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
    char *new = realloc(ab->b,ab->len+len);
                ~~~~~~~       ~~~~~~~^~~~
kilo.c:860:8: warning: padding size of 'struct abuf' with 4 bytes to alignment boundary [-Wpadded]
struct abuf {
       ^
kilo.c:939:30: warning: declaration shadows a local variable [-Wshadow]
                        char buf[16];
                             ^
kilo.c:885:10: note: previous declaration is here
    char buf[32];
         ^
kilo.c:996:33: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
    write(STDOUT_FILENO,ab.b,ab.len);
    ~~~~~                    ~~~^~~
kilo.c:976:18: warning: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Wshorten-64-to-32]
    int msglen = strlen(E.statusmsg);
        ~~~~~~   ^~~~~~~~~~~~~~~~~~~
kilo.c:994:22: warning: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Wshorten-64-to-32]
    abAppend(&ab,buf,strlen(buf));
    ~~~~~~~~         ^~~~~~~~~~~
kilo.c:1005:47: warning: format string is not a string literal [-Wformat-nonliteral]
    vsnprintf(E.statusmsg,sizeof(E.statusmsg),fmt,ap);
                                              ^~~
kilo.c:1057:33: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
                query[qlen++] = c;
                              ~ ^
kilo.c:1090:44: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
                    saved_hl = malloc(row->rsize);
                               ~~~~~~ ~~~~~^~~~~
kilo.c:1076:41: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
                    match_offset = match-E.row[current].render;
                                 ~ ~~~~~^~~~~~~~~~~~~~~~~~~~~~
kilo.c:1211:9: warning: 'break' will never be executed [-Wunreachable-code-break]
        break;
kilo.c:1307:12: warning: 'return' will never be executed [-Wunreachable-code-return]
    return 0;

[a-p-jo]

Not to mention a lot of malloc()s and realloc()s are not checked !