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do...-functions return now a value < 0 if the are block or > 0 of they are inline

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gottox@rootkit.lan 2007-12-14 17:31:40 +01:00
parent f86e34f88c
commit 49343dc73c
1 changed files with 57 additions and 71 deletions
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128
cmarkdown.c
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@ -24,25 +24,25 @@ struct Tag {
void eprint(const char *format, ...); /* Prints error and exits */ void eprint(const char *format, ...); /* Prints error and exits */
unsigned int doamp(const char *begin, const char *end, int first); unsigned int doamp(const char *begin, const char *end, int newblock);
/* Parser for & */ /* Parser for & */
unsigned int dohtml(const char *begin, const char *end, int first); unsigned int dohtml(const char *begin, const char *end, int newblock);
/* Parser for html */ /* Parser for html */
unsigned int dolineprefix(const char *begin, const char *end, int first); unsigned int dolineprefix(const char *begin, const char *end, int newblock);
/* Parser for line prefix tags */ /* Parser for line prefix tags */
unsigned int dolink(const char *begin, const char *end, int first); unsigned int dolink(const char *begin, const char *end, int newblock);
/* Parser for links and images */ /* Parser for links and images */
unsigned int dolist(const char *begin, const char *end, int first); unsigned int dolist(const char *begin, const char *end, int newblock);
/* Parser for lists */ /* Parser for lists */
unsigned int doparagraph(const char *begin, const char *end, int first); unsigned int doparagraph(const char *begin, const char *end, int newblock);
/* Parser for paragraphs */ /* Parser for paragraphs */
unsigned int doreplace(const char *begin, const char *end, int first); unsigned int doreplace(const char *begin, const char *end, int newblock);
/* Parser for simple replaces */ /* Parser for simple replaces */
unsigned int doshortlink(const char *begin, const char *end, int first); unsigned int doshortlink(const char *begin, const char *end, int newblock);
/* Parser for links and images */ /* Parser for links and images */
unsigned int dosurround(const char *begin, const char *end, int first); unsigned int dosurround(const char *begin, const char *end, int newblock);
/* Parser for surrounding tags */ /* Parser for surrounding tags */
unsigned int dounderline(const char *begin, const char *end, int first); unsigned int dounderline(const char *begin, const char *end, int newblock);
/* Parser for underline tags */ /* Parser for underline tags */
void hprint(const char *begin, const char *end); /* escapes HTML and prints it to stdout*/ void hprint(const char *begin, const char *end); /* escapes HTML and prints it to stdout*/
void process(const char *begin, const char *end, int isblock); void process(const char *begin, const char *end, int isblock);
@ -64,8 +64,8 @@ struct Tag lineprefix[] = {
{ "# ", 1, "h1" }, { "# ", 1, "h1" },
}; };
struct Tag underline[] = { struct Tag underline[] = {
{ "=", 1, "h1" }, { "=", 1, "<h1>" },
{ "-", 1, "h2" }, { "-", 1, "<h2>" },
}; };
struct Tag surround[] = { struct Tag surround[] = {
{ "``", 0, "code" }, { "``", 0, "code" },
@ -118,7 +118,7 @@ eprint(const char *format, ...) {
} }
unsigned int unsigned int
doamp(const char *begin, const char *end, int first) { doamp(const char *begin, const char *end, int newblock) {
const char *p; const char *p;
if(*begin != '&') if(*begin != '&')
@ -132,7 +132,7 @@ doamp(const char *begin, const char *end, int first) {
return 1; return 1;
} }
unsigned int unsigned int
dohtml(const char *begin, const char *end, int first) { dohtml(const char *begin, const char *end, int newblock) {
const char *p, *tag, *tagend; const char *p, *tag, *tagend;
if(nohtml || *begin != '\n' || !*begin) if(nohtml || *begin != '\n' || !*begin)
return 0; return 0;
@ -151,29 +151,24 @@ dohtml(const char *begin, const char *end, int first) {
p++; p++;
fwrite(begin, sizeof(char), p - begin + tagend - tag,stdout); fwrite(begin, sizeof(char), p - begin + tagend - tag,stdout);
puts("\n"); puts("\n");
return p - begin + tagend - tag; return -(p - begin + tagend - tag);
} }
} }
return 0; return 0;
} }
unsigned int unsigned int
dolineprefix(const char *begin, const char *end, int first) { dolineprefix(const char *begin, const char *end, int newblock) {
unsigned int i, j, l; unsigned int i, j, l;
char *buffer; char *buffer;
const char *p; const char *p;
if(*begin != '\n' && !first) if(!newblock)
return 0; return 0;
if(first)
p = begin; p = begin;
else
p = begin + 1;
for(i = 0; i < LENGTH(lineprefix); i++) { for(i = 0; i < LENGTH(lineprefix); i++) {
l = strlen(lineprefix[i].search); l = strlen(lineprefix[i].search);
if(end - p < l) if(end - p < l)
continue; continue;
if(!first && *begin != '\n')
continue;
if(strncmp(lineprefix[i].search,p,l)) if(strncmp(lineprefix[i].search,p,l))
continue; continue;
if(!(buffer = malloc(BUFFERSIZE))) if(!(buffer = malloc(BUFFERSIZE)))
@ -195,13 +190,13 @@ dolineprefix(const char *begin, const char *end, int first) {
hprint(buffer,buffer+strlen(buffer)); hprint(buffer,buffer+strlen(buffer));
printf("</%s>\n",lineprefix[i].tag); printf("</%s>\n",lineprefix[i].tag);
free(buffer); free(buffer);
return p - begin; return -(p - begin);
} }
return 0; return 0;
} }
unsigned int unsigned int
dolink(const char *begin, const char *end, int first) { dolink(const char *begin, const char *end, int newblock) {
int img; int img;
const char *desc, *link, *p, *q, *descend, *linkend; const char *desc, *link, *p, *q, *descend, *linkend;
@ -240,16 +235,14 @@ dolink(const char *begin, const char *end, int first) {
} }
unsigned int unsigned int
dolist(const char *begin, const char *end, int first) { dolist(const char *begin, const char *end, int newblock) {
unsigned int i, j, indent, run, ul, isblock; unsigned int i, j, indent, run, ul, isblock;
const char *p, *q; const char *p, *q;
char *buffer; char *buffer;
if((*begin != '\n' || begin[1] != '\n') && !first) if(!newblock)
return 0; return 0;
p = begin; p = begin;
if(!first)
p += 2;
q = p; q = p;
isblock = 0; isblock = 0;
if((*p == '-' || *p == '*' || *p == '+') && (p[1] == ' ' || p[1] == '\t')) { if((*p == '-' || *p == '*' || *p == '+') && (p[1] == ' ' || p[1] == '\t')) {
@ -313,32 +306,29 @@ dolist(const char *begin, const char *end, int first) {
free(buffer); free(buffer);
p--; p--;
while(*(--p) == '\n'); while(*(--p) == '\n');
return p - begin + 1; return -(p - begin + 1);
} }
unsigned int unsigned int
doparagraph(const char *begin, const char *end, int first) { doparagraph(const char *begin, const char *end, int newblock) {
const char *p, *q; const char *p, *q;
if(first) if(!newblock)
p = begin;
else if(*begin == '\n' && begin[1] == '\n')
p = begin + 2;
else
return 0; return 0;
p = begin;
q = strstr(p, "\n\n"); q = strstr(p, "\n\n");
if(!q || q > end) if(!q || q > end)
q = end; q = end;
if(q - begin <= 1) if(q - begin <= 1)
return 0; return 0;
fputs("<p>",stdout); fputs("<p>\n",stdout);
process(p,q,0); process(p,q,0);
fputs("</p>\n",stdout); fputs("\n</p>\n",stdout);
return q - begin; return -(q - begin);
} }
unsigned int unsigned int
doreplace(const char *begin, const char *end, int first) { doreplace(const char *begin, const char *end, int newblock) {
unsigned int i, l; unsigned int i, l;
for(i = 0; i < LENGTH(insert); i++) for(i = 0; i < LENGTH(insert); i++)
@ -357,7 +347,7 @@ doreplace(const char *begin, const char *end, int first) {
} }
unsigned int unsigned int
doshortlink(const char *begin, const char *end, int first) { doshortlink(const char *begin, const char *end, int newblock) {
const char *p, *c; const char *p, *c;
int ismail = 0; int ismail = 0;
@ -401,7 +391,7 @@ doshortlink(const char *begin, const char *end, int first) {
} }
unsigned int unsigned int
dosurround(const char *begin, const char *end, int first) { dosurround(const char *begin, const char *end, int newblock) {
unsigned int i,l; unsigned int i,l;
const char *p, *ps, *q, *qend; const char *p, *ps, *q, *qend;
@ -431,18 +421,13 @@ dosurround(const char *begin, const char *end, int first) {
} }
unsigned int unsigned int
dounderline(const char *begin, const char *end, int first) { dounderline(const char *begin, const char *end, int newblock) {
unsigned int i, j, l, nl; unsigned int i, j, l;
const char *p; const char *p;
if(*begin != '\n' && !first) if(!newblock)
return 0; return 0;
p = begin; p = begin;
nl = 0;
if(!first) {
nl = 1;
p++;
}
for(l = 0; p[l] != '\n' && p[l] && p+l != end; l++); for(l = 0; p[l] != '\n' && p[l] && p+l != end; l++);
p += l + 1; p += l + 1;
if(l == 0) if(l == 0)
@ -452,11 +437,11 @@ dounderline(const char *begin, const char *end, int first) {
if(j >= l) { if(j >= l) {
printf("<%s>",underline[i].tag); printf("<%s>",underline[i].tag);
if(underline[i].process) if(underline[i].process)
process(begin + nl, begin + l + nl, 0); process(begin, begin + l, 0);
else else
hprint(begin + nl, begin + l + nl); hprint(begin, begin + l);
printf("</%s>\n",underline[i].tag); printf("</%s>\n",underline[i].tag);
return j + p - begin; return -(j + p - begin);
} }
} }
return 0; return 0;
@ -481,32 +466,32 @@ hprint(const char *begin, const char *end) {
} }
void void
process(const char *begin, const char *end, int isblock) { process(const char *begin, const char *end, int newblock) {
const char *p, *q; const char *p, *q;
int affected; int affected;
unsigned int i; unsigned int i;
for(p = begin; *p && *p == '\n' && p < end;p++); for(p = begin; *p && p < end;) {
for(; *p && p < end;) { if(newblock)
while(*p == '\n') p++;
affected = 0; affected = 0;
for(i = 0; i < LENGTH(parsers) && affected == 0; i++) for(i = 0; i < LENGTH(parsers) && affected == 0; i++)
affected = parsers[i](p, end, isblock); affected = parsers[i](p, end, newblock);
if(affected) { p += abs(affected);
p += affected; if(!affected) {
while(*p+1 == '\n') if(nohtml)
p++; hprint(p,p+1);
} else
else { putchar(*p);
for(q = p; *q == '\n' && q != end; q++);
if(q != end && *q) {
if(nohtml)
hprint(p,p+1);
else
putchar(*p);
}
p++; p++;
} }
isblock = 0; for(q = p; *q == '\n' && q < end; q++);
if(q == end)
return;
else if(p[0] == '\n' && p[1] == '\n')
newblock = 1;
else
newblock = affected < 0;
} }
} }
@ -522,7 +507,8 @@ main(int argc, char *argv[]) {
eprint("Usage %s [-n] [file]\n -n escape html strictly\n",argv[0]); eprint("Usage %s [-n] [file]\n -n escape html strictly\n",argv[0]);
if(argc > 1 && strcmp("-n", argv[1]) == 0) if(argc > 1 && strcmp("-n", argv[1]) == 0)
nohtml = 1; nohtml = 1;
if(argc > 1 + nohtml && strcmp("-", argv[1 + nohtml]) != 0 && !(source = fopen(argv[1 + nohtml],"r"))) if(argc > 1 + nohtml && strcmp("-", argv[1 + nohtml]) != 0
&& !(source = fopen(argv[1 + nohtml],"r")))
eprint("Cannot open file `%s`\n",argv[1 + nohtml]); eprint("Cannot open file `%s`\n",argv[1 + nohtml]);
if(!(buffer = malloc(BUFFERSIZE))) if(!(buffer = malloc(BUFFERSIZE)))
eprint("Malloc failed."); eprint("Malloc failed.");