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smu.c: Format source code

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Enno Tensing 2025-01-20 18:49:00 +01:00
parent 82048dd49e
commit c702617acd
Signed by: tenno
GPG key ID: 95265603BD36E66C
1 changed files with 273 additions and 237 deletions
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smu.c
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@ -10,7 +10,13 @@
#include <ctype.h>
#define LENGTH(x) sizeof(x) / sizeof(x[0])
#define ADDC(b,i) if(i % BUFSIZ == 0) { b = realloc(b, (i + BUFSIZ) * sizeof(char)); if(!b) eprint("Malloc failed."); } b[i]
#define ADDC(b, i) \
if (i % BUFSIZ == 0) { \
b = realloc(b, (i + BUFSIZ) * sizeof(char)); \
if (!b) \
eprint("Malloc failed."); \
} \
b[i]
typedef int (*Parser)(const char *, const char *, int);
typedef struct {
@ -19,26 +25,40 @@ typedef struct {
char *before, *after;
} Tag;
static int doamp(const char *begin, const char *end, int newblock); /* Parser for & */
static int docomment(const char *begin, const char *end, int newblock); /* Parser for html-comments */
static int dogtlt(const char *begin, const char *end, int newblock); /* Parser for < and > */
static int dohtml(const char *begin, const char *end, int newblock); /* Parser for html */
static int dolineprefix(const char *begin, const char *end, int newblock);/* Parser for line prefix tags */
static int dolink(const char *begin, const char *end, int newblock); /* Parser for links and images */
static int dolist(const char *begin, const char *end, int newblock); /* Parser for lists */
static int doparagraph(const char *begin, const char *end, int newblock); /* Parser for paragraphs */
static int doreplace(const char *begin, const char *end, int newblock); /* Parser for simple replaces */
static int doshortlink(const char *begin, const char *end, int newblock); /* Parser for links and images */
static int dosurround(const char *begin, const char *end, int newblock); /* Parser for surrounding tags */
static int dounderline(const char *begin, const char *end, int newblock); /* Parser for underline tags */
static int doamp(const char *begin, const char *end,
int newblock); /* Parser for & */
static int docomment(const char *begin, const char *end,
int newblock); /* Parser for html-comments */
static int dogtlt(const char *begin, const char *end,
int newblock); /* Parser for < and > */
static int dohtml(const char *begin, const char *end,
int newblock); /* Parser for html */
static int dolineprefix(const char *begin, const char *end,
int newblock); /* Parser for line prefix tags */
static int dolink(const char *begin, const char *end,
int newblock); /* Parser for links and images */
static int dolist(const char *begin, const char *end,
int newblock); /* Parser for lists */
static int doparagraph(const char *begin, const char *end,
int newblock); /* Parser for paragraphs */
static int doreplace(const char *begin, const char *end,
int newblock); /* Parser for simple replaces */
static int doshortlink(const char *begin, const char *end,
int newblock); /* Parser for links and images */
static int dosurround(const char *begin, const char *end,
int newblock); /* Parser for surrounding tags */
static int dounderline(const char *begin, const char *end,
int newblock); /* Parser for underline tags */
static void *ereallocz(void *p, size_t size);
static void eprint(const char *format, ...);
static void hprint(const char *begin, const char *end); /* escapes HTML and prints it to output */
static void process(const char *begin, const char *end, int isblock); /* Processes range between begin and end. */
static void hprint(const char *begin,
const char *end); /* escapes HTML and prints it to output */
static void process(const char *begin, const char *end,
int isblock); /* Processes range between begin and end. */
/* list of parsers */
static Parser parsers[] = { dounderline, docomment, dolineprefix,
dolist, doparagraph, dogtlt, dosurround, dolink,
static Parser parsers[] = { dounderline, docomment, dolineprefix, dolist,
doparagraph, dogtlt, dosurround, dolink,
doshortlink, dohtml, doamp, doreplace };
static int nohtml = 0;
@ -72,29 +92,18 @@ static Tag surround[] = {
};
static const char *replace[][2] = {
{ "\\\\", "\\" },
{ "\\`", "`" },
{ "\\*", "*" },
{ "\\_", "_" },
{ "\\{", "{" },
{ "\\}", "}" },
{ "\\[", "[" },
{ "\\]", "]" },
{ "\\(", "(" },
{ "\\)", ")" },
{ "\\#", "#" },
{ "\\+", "+" },
{ "\\-", "-" },
{ "\\.", "." },
{ "\\!", "!" },
{ "\\\\", "\\" }, { "\\`", "`" }, { "\\*", "*" }, { "\\_", "_" },
{ "\\{", "{" }, { "\\}", "}" }, { "\\[", "[" }, { "\\]", "]" },
{ "\\(", "(" }, { "\\)", ")" }, { "\\#", "#" }, { "\\+", "+" },
{ "\\-", "-" }, { "\\.", "." }, { "\\!", "!" },
};
static const char *insert[][2] = {
{ " \n", "<br />" },
};
void
eprint(const char *format, ...) {
void eprint(const char *format, ...)
{
va_list ap;
va_start(ap, format);
@ -103,14 +112,15 @@ eprint(const char *format, ...) {
exit(EXIT_FAILURE);
}
int
doamp(const char *begin, const char *end, int newblock) {
int doamp(const char *begin, const char *end, int newblock)
{
const char *p;
if (*begin != '&')
return 0;
if (!nohtml) {
for(p = begin + 1; p != end && !strchr("; \\\n\t", *p); p++);
for (p = begin + 1; p != end && !strchr("; \\\n\t", *p); p++)
;
if (p == end || *p == ';')
return 0;
}
@ -118,8 +128,8 @@ doamp(const char *begin, const char *end, int newblock) {
return 1;
}
int
dogtlt(const char *begin, const char *end, int newblock) {
int dogtlt(const char *begin, const char *end, int newblock)
{
int brpos;
char c;
@ -132,16 +142,16 @@ dogtlt(const char *begin, const char *end, int newblock) {
if (!brpos && (c < 'a' || c > 'z') && (c < 'A' || c > 'Z')) {
fputs("&lt;", stdout);
return 1;
}
else if(brpos && (c < 'a' || c > 'z') && (c < 'A' || c > 'Z') && !strchr("/\"'",c)) {
} else if (brpos && (c < 'a' || c > 'z') && (c < 'A' || c > 'Z') &&
!strchr("/\"'", c)) {
fprintf(stdout, "%c&gt;", c);
return 2;
}
return 0;
}
int
docomment(const char *begin, const char *end, int newblock) {
int docomment(const char *begin, const char *end, int newblock)
{
char *p;
if (nohtml || strncmp("<!--", begin, 4))
@ -153,8 +163,8 @@ docomment(const char *begin, const char *end, int newblock) {
return (p + 3 - begin) * (newblock ? -1 : 1);
}
int
dohtml(const char *begin, const char *end, int newblock) {
int dohtml(const char *begin, const char *end, int newblock)
{
const char *p, *tag, *tagend;
if (nohtml || begin + 2 >= end)
@ -164,15 +174,18 @@ dohtml(const char *begin, const char *end, int newblock) {
return 0;
p++;
tag = p;
for(; isalnum(*p) && p < end; p++);
for (; isalnum(*p) && p < end; p++)
;
tagend = p;
if (p > end || tag == tagend)
return 0;
while ((p = strstr(p, "</")) && p < end) {
p += 2;
if(strncmp(p, tag, tagend - tag) == 0 && p[tagend - tag] == '>') {
if (strncmp(p, tag, tagend - tag) == 0 &&
p[tagend - tag] == '>') {
p++;
fwrite(begin, sizeof(char), p - begin + tagend - tag - 1, stdout);
fwrite(begin, sizeof(char),
p - begin + tagend - tag - 1, stdout);
return p - begin + tagend - tag - 1;
}
}
@ -180,13 +193,12 @@ dohtml(const char *begin, const char *end, int newblock) {
if (p) {
fwrite(begin, sizeof(char), p - begin + 1, stdout);
return p - begin + 1;
}
else
} else
return 0;
}
int
dolineprefix(const char *begin, const char *end, int newblock) {
int dolineprefix(const char *begin, const char *end, int newblock)
{
unsigned int i, j, l;
char *buffer;
const char *p;
@ -216,7 +228,8 @@ dolineprefix(const char *begin, const char *end, int newblock) {
/* Collect lines into buffer while they start with the prefix */
j = 0;
while((strncmp(lineprefix[i].search, p, l) == 0) && p + l < end) {
while ((strncmp(lineprefix[i].search, p, l) == 0) &&
p + l < end) {
p += l;
/* Special case for blockquotes: optional space after > */
@ -239,7 +252,8 @@ dolineprefix(const char *begin, const char *end, int newblock) {
ADDC(buffer, j) = '\0';
if (lineprefix[i].process)
process(buffer, buffer + strlen(buffer), lineprefix[i].process >= 2);
process(buffer, buffer + strlen(buffer),
lineprefix[i].process >= 2);
else
hprint(buffer, buffer + strlen(buffer));
puts(lineprefix[i].after);
@ -249,8 +263,8 @@ dolineprefix(const char *begin, const char *end, int newblock) {
return 0;
}
int
dolink(const char *begin, const char *end, int newblock) {
int dolink(const char *begin, const char *end, int newblock)
{
int img, len, sep, parens_depth = 1;
const char *desc, *link, *p, *q, *descend, *linkend;
const char *title = NULL, *titleend = NULL;
@ -264,7 +278,8 @@ dolink(const char *begin, const char *end, int newblock) {
p = desc = begin + 1 + img;
if (!(p = strstr(desc, "](")) || p > end)
return 0;
for(q = strstr(desc, "!["); q && q < end && q < p; q = strstr(q + 1, "!["))
for (q = strstr(desc, "!["); q && q < end && q < p;
q = strstr(q + 1, "!["))
if (!(p = strstr(p + 1, "](")) || p > end)
return 0;
descend = p;
@ -287,13 +302,16 @@ dolink(const char *begin, const char *end, int newblock) {
sep = p[0]; /* separator: can be " or ' */
title = p + 1;
/* strip trailing whitespace */
for(linkend = p; linkend > link && isspace(*(linkend - 1)); linkend--);
for(titleend = q - 1; titleend > title && isspace(*(titleend)); titleend--);
for (linkend = p; linkend > link && isspace(*(linkend - 1));
linkend--)
;
for (titleend = q - 1; titleend > title && isspace(*(titleend));
titleend--)
;
if (*titleend != sep) {
return 0;
}
}
else {
} else {
linkend = q;
}
@ -316,8 +334,7 @@ dolink(const char *begin, const char *end, int newblock) {
fputs("\" ", stdout);
}
fputs("/>", stdout);
}
else {
} else {
fputs("<a href=\"", stdout);
hprint(link, linkend);
fputs("\"", stdout);
@ -333,8 +350,8 @@ dolink(const char *begin, const char *end, int newblock) {
return len;
}
int
dolist(const char *begin, const char *end, int newblock) {
int dolist(const char *begin, const char *end, int newblock)
{
unsigned int i, j, indent, run, ul, isblock;
const char *p, *q;
char *buffer = NULL;
@ -353,14 +370,16 @@ dolist(const char *begin, const char *end, int newblock) {
marker = *p;
} else {
ul = 0;
for(; p < end && *p >= '0' && *p <= '9'; p++);
for (; p < end && *p >= '0' && *p <= '9'; p++)
;
if (p >= end || *p != '.')
return 0;
}
p++;
if (p >= end || !(*p == ' ' || *p == '\t'))
return 0;
for(p++; p != end && (*p == ' ' || *p == '\t'); p++);
for (p++; p != end && (*p == ' ' || *p == '\t'); p++)
;
indent = p - q;
buffer = ereallocz(buffer, BUFSIZ);
if (!newblock)
@ -374,7 +393,11 @@ dolist(const char *begin, const char *end, int newblock) {
break;
else {
/* Handle empty lines */
for(q = p + 1; (*q == ' ' || *q == '\t') && q < end; q++);
for (q = p + 1;
(*q == ' ' || *q == '\t') &&
q < end;
q++)
;
if (*q == '\n') {
ADDC(buffer, i) = '\n';
i++;
@ -388,7 +411,10 @@ dolist(const char *begin, const char *end, int newblock) {
if (ul && *q == marker)
j = 1;
else if (!ul) {
for(; q + j != end && q[j] >= '0' && q[j] <= '9' && j < indent; j++);
for (; q + j != end && q[j] >= '0' &&
q[j] <= '9' && j < indent;
j++)
;
if (q + j == end)
break;
if (j > 0 && q[j] == '.')
@ -397,7 +423,10 @@ dolist(const char *begin, const char *end, int newblock) {
j = 0;
}
if (q + indent < end)
for(; (q[j] == ' ' || q[j] == '\t') && j < indent; j++);
for (; (q[j] == ' ' || q[j] == '\t') &&
j < indent;
j++)
;
if (j == indent) {
ADDC(buffer, i) = '\n';
i++;
@ -407,26 +436,27 @@ dolist(const char *begin, const char *end, int newblock) {
p++;
else
break;
}
else if (j < indent)
} else if (j < indent)
run = 0;
}
ADDC(buffer, i) = *p;
}
ADDC(buffer, i) = '\0';
fputs("<li>", stdout);
process(buffer, buffer + i, isblock > 1 || (isblock == 1 && run));
process(buffer, buffer + i,
isblock > 1 || (isblock == 1 && run));
fputs("</li>\n", stdout);
}
fputs(ul ? "</ul>\n" : "</ol>\n", stdout);
free(buffer);
p--;
while(*(--p) == '\n');
while (*(--p) == '\n')
;
return -(p - begin + 1);
}
int
doparagraph(const char *begin, const char *end, int newblock) {
int doparagraph(const char *begin, const char *end, int newblock)
{
const char *p;
if (!newblock)
@ -442,8 +472,8 @@ doparagraph(const char *begin, const char *end, int newblock) {
return -(p - begin);
}
int
doreplace(const char *begin, const char *end, int newblock) {
int doreplace(const char *begin, const char *end, int newblock)
{
unsigned int i, l;
for (i = 0; i < LENGTH(insert); i++)
@ -461,8 +491,8 @@ doreplace(const char *begin, const char *end, int newblock) {
return 0;
}
int
doshortlink(const char *begin, const char *end, int newblock) {
int doshortlink(const char *begin, const char *end, int newblock)
{
const char *p, *c;
int ismail = 0;
@ -488,14 +518,14 @@ doshortlink(const char *begin, const char *end, int newblock) {
fputs("<a href=\"", stdout);
if (ismail == 1) {
/* mailto: */
fputs("&#x6D;&#x61;i&#x6C;&#x74;&#x6F;:", stdout);
fputs("&#x6D;&#x61;i&#x6C;&#x74;&#x6F;:",
stdout);
for (c = begin + 1; *c != '>'; c++)
fprintf(stdout, "&#%u;", *c);
fputs("\">", stdout);
for (c = begin + 1; *c != '>'; c++)
fprintf(stdout, "&#%u;", *c);
}
else {
} else {
hprint(begin + 1, p);
fputs("\">", stdout);
hprint(begin + 1, p);
@ -507,14 +537,15 @@ doshortlink(const char *begin, const char *end, int newblock) {
return 0;
}
int
dosurround(const char *begin, const char *end, int newblock) {
int dosurround(const char *begin, const char *end, int newblock)
{
unsigned int i, l;
const char *p, *start, *stop;
for (i = 0; i < LENGTH(surround); i++) {
l = strlen(surround[i].search);
if(end - begin < 2*l || strncmp(begin, surround[i].search, l) != 0)
if (end - begin < 2 * l ||
strncmp(begin, surround[i].search, l) != 0)
continue;
start = begin + l;
p = start - 1;
@ -545,20 +576,24 @@ dosurround(const char *begin, const char *end, int newblock) {
return 0;
}
int
dounderline(const char *begin, const char *end, int newblock) {
int dounderline(const char *begin, const char *end, int newblock)
{
unsigned int i, j, l;
const char *p;
if (!newblock)
return 0;
p = begin;
for(l = 0; p + l + 1 != end && p[l] != '\n'; l++);
for (l = 0; p + l + 1 != end && p[l] != '\n'; l++)
;
p += l + 1;
if (l == 0)
return 0;
for (i = 0; i < LENGTH(underline); i++) {
for(j = 0; p + j != end && p[j] != '\n' && p[j] == underline[i].search[0]; j++);
for (j = 0; p + j != end && p[j] != '\n' &&
p[j] == underline[i].search[0];
j++)
;
if (j >= l) {
fputs(underline[i].before, stdout);
if (underline[i].process)
@ -572,8 +607,8 @@ dounderline(const char *begin, const char *end, int newblock) {
return 0;
}
void *
ereallocz(void *p, size_t size) {
void *ereallocz(void *p, size_t size)
{
void *res;
if (p)
res = realloc(p, size);
@ -585,8 +620,8 @@ ereallocz(void *p, size_t size) {
return res;
}
void
hprint(const char *begin, const char *end) {
void hprint(const char *begin, const char *end)
{
const char *p;
for (p = begin; p != end; p++) {
@ -603,8 +638,8 @@ hprint(const char *begin, const char *end) {
}
}
void
process(const char *begin, const char *end, int newblock) {
void process(const char *begin, const char *end, int newblock)
{
const char *p, *q;
int affected;
unsigned int i;
@ -625,7 +660,8 @@ process(const char *begin, const char *end, int newblock) {
fputc(*p, stdout);
p++;
}
for(q = p; q != end && *q == '\n'; q++);
for (q = p; q != end && *q == '\n'; q++)
;
if (q == end)
return;
else if (p[0] == '\n' && p + 1 != end && p[1] == '\n')
@ -635,8 +671,8 @@ process(const char *begin, const char *end, int newblock) {
}
}
int
main(int argc, char *argv[]) {
int main(int argc, char *argv[])
{
char *buffer = NULL;
int s, i;
unsigned long len, bsize;
@ -652,9 +688,9 @@ main(int argc, char *argv[]) {
else if (!strcmp("--", argv[i])) {
i++;
break;
}
else
eprint("Usage %s [-n] [file]\n -n escape html strictly\n", argv[0]);
} else
eprint("Usage %s [-n] [file]\n -n escape html strictly\n",
argv[0]);
}
if (i < argc && !(source = fopen(argv[i], "r")))
eprint("Cannot open file `%s`\n", argv[i]);