/* extract_pattern: copy a pattern string from the command buffer; return
pointer to the copy */
char *
extract_pattern(int delimiter)
{
static char *lhbuf = NULL; /* buffer */
static int lhbufsz = 0; /* buffer size */
char *nd;
int len;
for (nd = ibufp; *nd != delimiter && *nd != '\n'; nd++)
switch (*nd) {
default:
break;
case '[':
if ((nd = parse_char_class(++nd)) == NULL) {
seterrmsg("unbalanced brackets ([])");
return NULL;
}
break;
case '\\':
if (*++nd == '\n') {
seterrmsg("trailing backslash (\\)");
return NULL;
}
break;
}
len = nd - ibufp;
REALLOC(lhbuf, lhbufsz, len + 1, NULL);
memcpy(lhbuf, ibufp, len);
lhbuf[len] = '\0';
ibufp = nd;
return (isbinary) ? NUL_TO_NEWLINE(lhbuf, len) : lhbuf;
}
/* push_undo_stack: return pointer to initialized undo node */
undo_t *
push_undo_stack(int type, long from, long to)
{
undo_t *t;
#if defined(sun) || defined(NO_REALLOC_NULL)
if (ustack == NULL &&
(ustack = (undo_t *) malloc((usize = USIZE) * sizeof(undo_t))) == NULL) {
fprintf(stderr, "%s\n", strerror(errno));
seterrmsg("out of memory");
return NULL;
}
#endif
t = ustack;
if (u_p < usize ||
(t = (undo_t *) realloc(ustack, (usize += USIZE) * sizeof(undo_t))) != NULL) {
ustack = t;
ustack[u_p].type = type;
ustack[u_p].t = get_addressed_line_node(to);
ustack[u_p].h = get_addressed_line_node(from);
return ustack + u_p++;
}
/* out of memory - release undo stack */
fprintf(stderr, "%s\n", strerror(errno));
seterrmsg("out of memory");
clear_undo_stack();
free(ustack);
ustack = NULL;
usize = 0;
return NULL;
}
/* set_active_node: add a line node to the global-active list */
int
set_active_node(line_t *lp)
{
if (active_last + 1 > active_size) {
int ti = active_size;
line_t **ts;
SPL1();
#if defined(sun) || defined(NO_REALLOC_NULL)
if (active_list != NULL) {
#endif
if ((ts = (line_t **) realloc(active_list,
(ti += MINBUFSZ) * sizeof(line_t **))) == NULL) {
fprintf(stderr, "%s\n", strerror(errno));
seterrmsg("out of memory");
SPL0();
return ERR;
}
#if defined(sun) || defined(NO_REALLOC_NULL)
} else {
if ((ts = (line_t **) malloc((ti += MINBUFSZ) *
sizeof(line_t **))) == NULL) {
fprintf(stderr, "%s\n", strerror(errno));
seterrmsg("out of memory");
SPL0();
return ERR;
}
}
#endif
active_size = ti;
active_list = ts;
SPL0();
}
active_list[active_last++] = lp;
return 0;
}
/* get_compiled_pattern: return pointer to compiled pattern from command
buffer */
pattern_t *
get_compiled_pattern(void)
{
static pattern_t *exp = NULL;
char *exps;
char delimiter;
int n;
if ((delimiter = *ibufp) == ' ') {
seterrmsg("invalid pattern delimiter");
return NULL;
} else if (delimiter == '\n' || *++ibufp == '\n' || *ibufp == delimiter) {
if (!exp)
seterrmsg("no previous pattern");
return exp;
} else if ((exps = extract_pattern(delimiter)) == NULL)
return NULL;
/* buffer alloc'd && not reserved */
if (exp && !patlock)
regfree(exp);
else if ((exp = (pattern_t *) malloc(sizeof(pattern_t))) == NULL) {
perror(NULL);
seterrmsg("out of memory");
return NULL;
}
patlock = 0;
if ((n = regcomp(exp, exps, 0)) != 0) {
regerror(n, exp, errmsg, sizeof errmsg);
free(exp);
return exp = NULL;
}
return exp;
}
/* exec_global: apply command list in the command buffer to the active
lines in a range; return command status */
int
exec_global(int interact, int gflag)
{
static char *ocmd = NULL;
static int ocmdsz = 0;
line_t *lp = NULL;
int status;
int n;
char *cmd = NULL;
if (!interact) {
if (!strcmp(ibufp, "\n"))
cmd = "p\n"; /* null cmd-list == `p' */
else if ((cmd = get_extended_line(&n, 0)) == NULL)
return ERR;
}
clear_undo_stack();
while ((lp = next_active_node()) != NULL) {
if ((current_addr = get_line_node_addr(lp)) < 0)
return ERR;
if (interact) {
/* print current_addr; get a command in global syntax */
if (display_lines(current_addr, current_addr, gflag) < 0)
return ERR;
while ((n = get_tty_line()) > 0 &&
ibuf[n - 1] != '\n')
clearerr(stdin);
if (n < 0)
return ERR;
else if (n == 0) {
seterrmsg("unexpected end-of-file");
return ERR;
} else if (n == 1 && !strcmp(ibuf, "\n"))
continue;
else if (n == 2 && !strcmp(ibuf, "&\n")) {
if (cmd == NULL) {
seterrmsg("no previous command");
return ERR;
} else cmd = ocmd;
} else if ((cmd = get_extended_line(&n, 0)) == NULL)
return ERR;
else {
REALLOC(ocmd, ocmdsz, n + 1, ERR);
memcpy(ocmd, cmd, n + 1);
cmd = ocmd;
}
}
ibufp = cmd;
for (; *ibufp;)
if ((status = extract_addr_range()) < 0 ||
(status = exec_command()) < 0 ||
(status > 0 && (status = display_lines(
current_addr, current_addr, status)) < 0))
return status;
}
return 0;
}
tpl_doc *tpl_ctx_get_tpl_doc(tpl_ctx *t, const char *inpath)
{
char tpath[MAXPATHLEN] = { 0 };
int err;
tpl_doc *tdoc = NULL;
tpl_doc *ndoc;
tpl_doc *mdoc;
const char *ext = NULL;
char pext[MAXPATHLEN] = { 0 };
const char *next = NULL;
int off = 0;
ext = getext(inpath);
if(ext == NULL) {
seterrmsg(t, "File path has no extensions");
return NULL;
}
do {
if(next != NULL) {
if(strcmp(next, pext) != 0)
off = 0;
ext = next;
}
err = get_tpl_path(t, ext, tpath, &off);
if(err) {
if(tdoc != NULL)
return tdoc;
seterrmsg(t, "Did not find template for file extension '%s'", ext);
return NULL;
}
ndoc = tpl_doc_parse(t, tpath);
if(ndoc == NULL) {
seterrmsg(t, "Failed to parse template file '%s': %s", tpath, tpl_ctx_error(t));
return NULL;
}
if(tdoc == NULL)
tdoc = ndoc;
else {
mdoc = tpl_doc_merge(ndoc, tdoc);
strncpy(pext, ext, sizeof(pext));
tpl_doc_destroy(tdoc);
tpl_doc_destroy(ndoc);
tdoc = mdoc;
}
} while((next = tpl_doc_get_definition(tdoc, "-template")) != NULL);
return tdoc;
}
/* build_active_list: add line matching a pattern to the global-active list */
int
build_active_list(int isgcmd)
{
regex_t *pat;
line_t *lp;
int n;
char *s;
char delimiter;
if ((delimiter = *ibufp) == ' ' || delimiter == '\n') {
seterrmsg("invalid pattern delimiter");
return ERR;
} else if ((pat = get_compiled_pattern()) == NULL)
return ERR;
else if (*ibufp == delimiter)
ibufp++;
clear_active_list();
lp = get_addressed_line_node(first_addr);
for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw) {
if ((s = get_sbuf_line(lp)) == NULL)
return ERR;
if (isbinary)
NUL_TO_NEWLINE(s, lp->len);
if (!regexec(pat, s, 0, NULL, 0) == isgcmd &&
set_active_node(lp) < 0)
return ERR;
}
return 0;
}
/* get_stream_line: read a line of text from a stream; return line length */
int
get_stream_line(FILE *fp)
{
int c;
int i = 0;
while (((c = DESGETCHAR(fp)) != EOF || (!feof(fp) &&
!ferror(fp))) && c != '\n') {
REALLOC(sbuf, sbufsz, i + 1, ERR);
if (!(sbuf[i++] = c))
isbinary = 1;
}
REALLOC(sbuf, sbufsz, i + 2, ERR);
if (c == '\n')
sbuf[i++] = c;
else if (ferror(fp)) {
perror(NULL);
seterrmsg("cannot read input file");
return ERR;
} else if (i) {
sbuf[i++] = '\n';
newline_added = 1;
}
sbuf[i] = '\0';
return (isbinary && newline_added && i) ? --i : i;
}
/* get_stream_line: read a line of text from a stream; return line length */
int
get_stream_line(FILE *fp)
{
int c;
int i = 0;
while (((c = des ? get_des_char(fp) : getc(fp)) != EOF || (!feof(fp) &&
!ferror(fp))) && c != '\n') {
REALLOC(sbuf, sbufsz, i + 1, ERR);
if (!(sbuf[i++] = c))
isbinary = 1;
}
REALLOC(sbuf, sbufsz, i + 2, ERR);
if (c == '\n')
sbuf[i++] = c;
else if (ferror(fp)) {
fprintf(stderr, "%s\n", strerror(errno));
seterrmsg("cannot read input file");
return ERR;
} else if (i) {
sbuf[i++] = '\n';
newline_added = 1;
}
sbuf[i] = '\0';
return (isbinary && newline_added && i) ? --i : i;
}
/* extract_subst_template: return pointer to copy of substitution template
in the command buffer */
char *
extract_subst_template(void)
{
int n = 0;
int i = 0;
char c;
char delimiter = *ibufp++;
if (*ibufp == '%' && *(ibufp + 1) == delimiter) {
ibufp++;
if (!rhbuf)
seterrmsg("no previous substitution");
return rhbuf;
}
while (*ibufp != delimiter) {
REALLOC(rhbuf, rhbufsz, i + 2, NULL);
if ((c = rhbuf[i++] = *ibufp++) == '\n' && *ibufp == '\0') {
i--, ibufp--;
break;
} else if (c != '\\')
;
else if ((rhbuf[i++] = *ibufp++) != '\n')
;
else if (!isglobal) {
while ((n = get_tty_line()) == 0 ||
(n > 0 && ibuf[n - 1] != '\n'))
clearerr(stdin);
if (n < 0)
return NULL;
}
}
REALLOC(rhbuf, rhbufsz, i + 1, NULL);
rhbuf[rhbufi = i] = '\0';
return rhbuf;
}
/* put_stream_line: write a line of text to a stream; return status */
int
put_stream_line(FILE *fp, char *s, int len)
{
while (len--)
if ((des ? put_des_char(*s++, fp) : fputc(*s++, fp)) < 0) {
fprintf(stderr, "%s\n", strerror(errno));
seterrmsg("cannot write file");
return ERR;
}
return 0;
}
/* write_file: write a range of lines to a named file/pipe; return line count */
int
write_file(char *fn, char *mode, int n, int m)
{
FILE *fp;
int size;
fp = (*fn == '!') ? popen(fn+1, "w") : fopen(strip_escapes(fn), mode);
if (fp == NULL) {
perror(fn);
seterrmsg("cannot open output file");
return ERR;
} else if ((size = write_stream(fp, n, m)) < 0)
return ERR;
else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) {
perror(fn);
seterrmsg("cannot close output file");
return ERR;
}
fprintf(stderr, !scripted ? "%d\n" : "", size);
return n ? m - n + 1 : 0;
}
/* substitute_matching_text: replace text matched by a pattern according to
a substitution template; return pointer to the modified text */
int
substitute_matching_text(pattern_t *pat, line_t *lp, int gflag, int kth)
{
int off = 0;
int changed = 0;
int matchno = 0;
int i = 0;
regmatch_t rm[SE_MAX];
char *txt;
char *eot;
if ((txt = get_sbuf_line(lp)) == NULL)
return ERR;
if (isbinary)
NUL_TO_NEWLINE(txt, lp->len);
eot = txt + lp->len;
if (!regexec(pat, txt, SE_MAX, rm, 0)) {
do {
if (!kth || kth == ++matchno) {
changed++;
i = rm[0].rm_so;
REALLOC(rbuf, rbufsz, off + i, ERR);
if (isbinary)
NEWLINE_TO_NUL(txt, rm[0].rm_eo);
memcpy(rbuf + off, txt, i);
off += i;
if ((off = apply_subst_template(txt, rm, off,
pat->re_nsub)) < 0)
return ERR;
} else {
i = rm[0].rm_eo;
REALLOC(rbuf, rbufsz, off + i, ERR);
if (isbinary)
NEWLINE_TO_NUL(txt, i);
memcpy(rbuf + off, txt, i);
off += i;
}
txt += rm[0].rm_eo;
} while (*txt && (!changed || ((gflag & GSG) && rm[0].rm_eo)) &&
!regexec(pat, txt, SE_MAX, rm, REG_NOTBOL));
i = eot - txt;
REALLOC(rbuf, rbufsz, off + i + 2, ERR);
if (i > 0 && !rm[0].rm_eo && (gflag & GSG)) {
seterrmsg("infinite substitution loop");
return ERR;
}
if (isbinary)
NEWLINE_TO_NUL(txt, i);
memcpy(rbuf + off, txt, i);
memcpy(rbuf + off + i, "\n", 2);
}
return changed ? off + i + 1 : 0;
}
/* write_file: write a range of lines to a named file/pipe; return line count */
long
write_file(const char *fn, const char *mode, long n, long m)
{
FILE *fp;
long size;
fp = (*fn == '!') ? popen(fn+1, "w") : fopen(strip_escapes(fn), mode);
if (fp == NULL) {
fprintf(stderr, "%s: %s\n", fn, strerror(errno));
seterrmsg("cannot open output file");
return ERR;
} else if ((size = write_stream(fp, n, m)) < 0)
return ERR;
else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) {
fprintf(stderr, "%s: %s\n", fn, strerror(errno));
seterrmsg("cannot close output file");
return ERR;
}
if (!scripted)
fprintf(stderr, "%lu\n", size);
return n ? m - n + 1 : 0;
}
/* put_stream_line: write a line of text to a stream; return status */
int
put_stream_line(FILE *fp, char *s, int len)
{
while (len--) {
if (DESPUTCHAR(*s, fp) < 0) {
perror(NULL);
seterrmsg("cannot write file");
return ERR;
}
s++;
}
return 0;
}
/* read_file: read a named file/pipe into the buffer; return line count */
int
read_file(char *fn, int n)
{
FILE *fp;
int size;
fp = (*fn == '!') ? popen(fn + 1, "r") : fopen(strip_escapes(fn), "r");
if (fp == NULL) {
perror(fn);
seterrmsg("cannot open input file");
return ERR;
} else if ((size = read_stream(fp, n)) < 0)
return ERR;
else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) {
perror(fn);
seterrmsg("cannot close input file");
return ERR;
}
fprintf(stderr, !scripted ? "%d\n" : "", size);
return current_addr - n;
}
int tpl_ctx_process(tpl_ctx *ctx, const char *inpath, void *in, void *out)
{
tpl_doc *tdoc;
tdoc = tpl_ctx_get_tpl_doc(ctx, inpath);
if(tdoc == NULL) {
seterrmsg(ctx, "Failed to gather template for file '%s': %s", inpath, tpl_ctx_error(ctx));
return -1;
}
tpl_doc_process(tdoc, in, out);
return 0;
}
/* read_file: read a named file/pipe into the buffer; return line count */
long
read_file(char *fn, long n)
{
FILE *fp;
long size;
fp = (*fn == '!') ? popen(fn + 1, "r") : fopen(strip_escapes(fn), "r");
if (fp == NULL) {
fprintf(stderr, "%s: %s\n", fn, strerror(errno));
seterrmsg("cannot open input file");
return ERR;
} else if ((size = read_stream(fp, n)) < 0)
return ERR;
else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) {
fprintf(stderr, "%s: %s\n", fn, strerror(errno));
seterrmsg("cannot close input file");
return ERR;
}
if (!scripted)
fprintf(stderr, "%lu\n", size);
return current_addr - n;
}
/* search_and_replace: for each line in a range, change text matching a pattern
according to a substitution template; return status */
int
search_and_replace(pattern_t *pat, int gflag, int kth)
{
undo_t *up;
char *txt;
char *eot;
int lc;
int xa = current_addr;
int nsubs = 0;
line_t *lp;
int len;
current_addr = first_addr - 1;
for (lc = 0; lc <= second_addr - first_addr; lc++) {
lp = get_addressed_line_node(++current_addr);
if ((len = substitute_matching_text(pat, lp, gflag, kth)) < 0)
return ERR;
else if (len) {
up = NULL;
if (delete_lines(current_addr, current_addr) < 0)
return ERR;
txt = rbuf;
eot = rbuf + len;
SPL1();
do {
if ((txt = put_sbuf_line(txt)) == NULL) {
SPL0();
return ERR;
} else if (up)
up->t = get_addressed_line_node(current_addr);
else if ((up = push_undo_stack(UADD,
current_addr, current_addr)) == NULL) {
SPL0();
return ERR;
}
} while (txt != eot);
SPL0();
nsubs++;
xa = current_addr;
}
}
current_addr = xa;
if (nsubs == 0 && !(gflag & GLB)) {
seterrmsg("no match");
return ERR;
} else if ((gflag & (GPR | GLS | GNP)) &&
display_lines(current_addr, current_addr, gflag) < 0)
return ERR;
return 0;
}
int tpl_ctx_get_outpath(tpl_ctx *ctx, const char *inpath, char outpath[MAXPATHLEN])
{
tpl_doc *t;
char *outext;
char *inext;
t = tpl_ctx_get_tpl_doc(ctx, inpath);
if(t == NULL) {
seterrmsg(ctx, "Did not find templates for file '%s': %s", inpath, tpl_ctx_error(ctx));
return -1;
}
outext = tpl_doc_get_definition(t, "-output");
if(outext == NULL) {
seterrmsg(ctx, "Template output file extension not defined for '%s'", inpath);
return -1;
}
strncpy(outpath, inpath, MAXPATHLEN);
inext = (char *)getext(outpath);
strncpy(inext, outext, MAXPATHLEN - strlen(inpath));
return 0;
}
/* pop_undo_stack: undo last change to the editor buffer */
int
pop_undo_stack(void)
{
long n;
long o_current_addr = current_addr;
long o_addr_last = addr_last;
if (u_current_addr == -1 || u_addr_last == -1) {
seterrmsg("nothing to undo");
return ERR;
} else if (u_p)
modified = 1;
get_addressed_line_node(0); /* this get_addressed_line_node last! */
SPL1();
for (n = u_p; n-- > 0;) {
switch(ustack[n].type) {
case UADD:
REQUE(ustack[n].h->q_back, ustack[n].t->q_forw);
break;
case UDEL:
REQUE(ustack[n].h->q_back, ustack[n].h);
REQUE(ustack[n].t, ustack[n].t->q_forw);
break;
case UMOV:
case VMOV:
REQUE(ustack[n - 1].h, ustack[n].h->q_forw);
REQUE(ustack[n].t->q_back, ustack[n - 1].t);
REQUE(ustack[n].h, ustack[n].t);
n--;
break;
default:
/*NOTREACHED*/
;
}
ustack[n].type ^= 1;
}
/* reverse undo stack order */
for (n = u_p; n-- > (u_p + 1)/ 2;)
USWAP(ustack[n], ustack[u_p - 1 - n]);
if (isglobal)
clear_active_list();
current_addr = u_current_addr, u_current_addr = o_current_addr;
addr_last = u_addr_last, u_addr_last = o_addr_last;
SPL0();
return 0;
}
/* get_extended_line: get a an extended line from stdin */
char *
get_extended_line(int *sizep, int nonl)
{
static char *cvbuf = NULL; /* buffer */
static int cvbufsz = 0; /* buffer size */
int l, n;
char *t = ibufp;
while (*t++ != '\n')
;
if ((l = t - ibufp) < 2 || !has_trailing_escape(ibufp, ibufp + l - 1)) {
*sizep = l;
return ibufp;
}
*sizep = -1;
REALLOC(cvbuf, cvbufsz, l, NULL);
memcpy(cvbuf, ibufp, l);
*(cvbuf + --l - 1) = '\n'; /* strip trailing esc */
if (nonl)
l--; /* strip newline */
for (;;) {
if ((n = get_tty_line()) < 0)
return NULL;
else if (n == 0 || ibuf[n - 1] != '\n') {
seterrmsg("unexpected end-of-file");
return NULL;
}
REALLOC(cvbuf, cvbufsz, l + n, NULL);
memcpy(cvbuf + l, ibuf, n);
l += n;
if (n < 2 || !has_trailing_escape(cvbuf, cvbuf + l - 1))
break;
*(cvbuf + --l - 1) = '\n'; /* strip trailing esc */
if (nonl) l--; /* strip newline */
}
REALLOC(cvbuf, cvbufsz, l + 1, NULL);
cvbuf[l] = '\0';
*sizep = l;
return cvbuf;
}
/* set_active_node: add a line node to the global-active list */
static int
set_active_node(line_t *lp)
{
if (active_last + 1 > active_size) {
int ti = active_size;
line_t **ts;
SPL1();
if ((ts = reallocarray(active_list,
(ti += MINBUFSZ), sizeof(line_t **))) == NULL) {
perror(NULL);
seterrmsg("out of memory");
SPL0();
return ERR;
}
active_size = ti;
active_list = ts;
SPL0();
}
active_list[active_last++] = lp;
return 0;
}
/* get_tty_line: read a line of text from stdin; return line length */
int
get_tty_line(void)
{
int oi = 0;
int i = 0;
int c;
for (;;)
switch (c = getchar()) {
default:
oi = 0;
REALLOC(ibuf, ibufsz, i + 2, ERR);
if (!(ibuf[i++] = c)) isbinary = 1;
if (c != '\n')
continue;
lineno++;
ibuf[i] = '\0';
ibufp = ibuf;
return i;
case EOF:
if (ferror(stdin)) {
fprintf(stderr, "stdin: %s\n", strerror(errno));
seterrmsg("cannot read stdin");
clearerr(stdin);
ibufp = NULL;
return ERR;
} else {
clearerr(stdin);
if (i != oi) {
oi = i;
continue;
} else if (i)
ibuf[i] = '\0';
ibufp = ibuf;
return i;
}
}
}
/* push_undo_stack: return pointer to initialized undo node */
undo_t *
push_undo_stack(int type, int from, int to)
{
undo_t *t;
t = ustack;
if (u_p < usize ||
(t = reallocarray(ustack, (usize += USIZE), sizeof(undo_t))) != NULL) {
ustack = t;
ustack[u_p].type = type;
ustack[u_p].t = get_addressed_line_node(to);
ustack[u_p].h = get_addressed_line_node(from);
return ustack + u_p++;
}
/* out of memory - release undo stack */
perror(NULL);
seterrmsg("out of memory");
clear_undo_stack();
free(ustack);
ustack = NULL;
usize = 0;
return NULL;
}
