diff options
Diffstat (limited to 'funtools/scan.c')
| -rw-r--r-- | funtools/scan.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/funtools/scan.c b/funtools/scan.c new file mode 100644 index 0000000..f6f2227 --- /dev/null +++ b/funtools/scan.c @@ -0,0 +1,231 @@ +#include <stdio.h> +#include <string.h> +#include <funtoolsP.h> + +static char macrobuf[SZ_LINE]; + +typedef struct hcstruct{ + int args; + int eflag; + int clen; + int maxlen; + char *fmt; + char *expr; + char mbuf[SZ_LINE]; + char tbuf[SZ_LINE]; +} *HC, HCRec; + +static char *_HeadColumnCB(char *name, void *client_data) +{ + HC hc = (HC)client_data; + + /* macro replacement */ + if( !strcmp(name, "name") || !strcmp(name, "col") ){ + if( strchr(hc->mbuf, 'n') ){ + hc->eflag = 1; + gerror(stderr, + "$%s can only be specified once in headcol format\n", name); + return NULL; + } + strncpy(macrobuf, "%s", SZ_LINE); + strncat(hc->mbuf, "n", SZ_LINE); + hc->args++; + return macrobuf; + } + else if( !strcmp(name, "format") || !strcmp(name, "fmt") ){ + if( strchr(hc->mbuf, 'f') ){ + hc->eflag = 1; + gerror(stderr, + "$%s can only be specified once in headcol format\n", name); + return NULL; + } + strncpy(macrobuf, "%[a-zA-Z0-9.]", SZ_LINE); + strncat(hc->mbuf, "f", SZ_LINE); + hc->args++; + return macrobuf; + } + else if( !strcmp(name, "skip") ){ + strncpy(macrobuf, "%*s", SZ_LINE); + return macrobuf; + } + else if( !strcmp(name, "skipi") ){ + strncpy(macrobuf, "%*d", SZ_LINE); + return macrobuf; + } + else if( !strcmp(name, "skipf") ){ + strncpy(macrobuf, "%*f", SZ_LINE); + return macrobuf; + } + else{ + return NULL; + } +} + +void HeadColumnFree(HC hc) +{ + /* sanity check */ + if( !hc ) return; + if( hc->fmt ) xfree(hc->fmt); + xfree(hc); +} + +HC HeadColumnNew(char *s) +{ + HC hc=NULL; + + /* sanity check */ + if( !s ) return NULL; + /* allocate record */ + if( !(hc=xcalloc(1, sizeof(HCRec))) ) return NULL; + /* expand format specification to make a scanf format */ + if( !(hc->fmt = ExpandMacro(s, NULL, NULL, 0, _HeadColumnCB, hc)) || + hc->eflag ){ + HeadColumnFree(hc); + return NULL; + } + fprintf(stderr, "format: %s mbuf=%s args=%d\n", hc->fmt, hc->mbuf, hc->args); + return hc; +} + +char *HeadColumnProcess(HC hc, char *s) +{ + int got; + int len; + char tbuf[SZ_LINE]; + char tbuf1[SZ_LINE]; + char tbuf2[SZ_LINE]; + + /* sanity check */ + if( !hc || !*hc->mbuf || !hc->fmt || !s ) return NULL; + + /* clear buffers */ + *tbuf = '\0'; + *tbuf1 = '\0'; + *tbuf2 = '\0'; + + if( !strcmp(hc->mbuf, "n") ){ + if( (got = sscanf(s, hc->fmt, tbuf1)) != hc->args ) return NULL; + strncpy(tbuf, tbuf1, SZ_LINE); + } + else if( !strcmp(hc->mbuf, "f") ){ + if( (got = sscanf(s, hc->fmt, tbuf1)) != hc->args ) return NULL; + strncpy(tbuf, tbuf1, SZ_LINE); + } + else if( !strcmp(hc->mbuf, "nf") ){ + if( (got = sscanf(s, hc->fmt, tbuf1, tbuf2)) != hc->args ) return NULL; + switch(*tbuf2){ + case 'I': + snprintf(tbuf, SZ_LINE, "%s:J", tbuf1); + break; + case 'F': + snprintf(tbuf, SZ_LINE, "%s:D", tbuf1); + break; + case 'A': + snprintf(tbuf, SZ_LINE, "%s:%s", tbuf1, tbuf2); + break; + default: + snprintf(tbuf, SZ_LINE, "%s:%s", tbuf1, tbuf2); + break; + } + } + else if( !strcmp(hc->mbuf, "fn") ){ + if( (got = sscanf(s, hc->fmt, tbuf1, tbuf2)) != hc->args ) return NULL; + switch(*tbuf2){ + case 'I': + snprintf(tbuf, SZ_LINE, "%s:J", tbuf2); + break; + case 'F': + snprintf(tbuf, SZ_LINE, "%s:D", tbuf2); + break; + case 'A': + snprintf(tbuf, SZ_LINE, "%s:%s", tbuf2, tbuf1); + break; + default: + snprintf(tbuf, SZ_LINE, "%s:%s", tbuf2, tbuf1); + break; + } + } + else{ + *tbuf = '\0'; + } + + /* add to expression */ + if( hc->tbuf ){ + len = strlen(tbuf); + if( (len + hc->clen + 1) >= hc->maxlen ){ + while( (len + hc->clen +1) > hc->maxlen ){ + hc->maxlen += SZ_LINE; + } + if( hc->clen == 0 ) + hc->expr = (char *)xcalloc(hc->maxlen, sizeof(char)); + else + hc->expr = (char *)xrealloc(hc->expr, hc->maxlen); + } + if( *hc->expr ) strncat(hc->expr, ",", SZ_LINE-1); + strncat(hc->expr, tbuf, SZ_LINE-1); + } + + /* return what we just got */ + return hc->tbuf; +} + +char *HeadColumnExpr(HC hc) +{ + /* sanity check */ + if( !hc ) return NULL; + /* return current expression */ + return hc->expr; +} + +int main(int argc, char **argv) +{ + int i; + char *fptr=NULL; + char *expr=NULL; + char *lptr; + char lbuf[SZ_LINE]; + HC hc; + + if( argc >= 2 ){ + fptr = argv[1]; + } + else{ + fptr = "Column $name ($format)"; + } + + /* initialize columnheader priocessing */ + if( !(hc = HeadColumnNew(fptr)) ){ + gerror(stderr, "can't init headcolumn\n"); + return 1; + } + + /* read comment lines and look for column specifications */ + if( argc > 2 ){ + for(i=2; i<argc; i++){ + strncpy(lbuf, argv[i], SZ_LINE); + lptr = lbuf; + if( *lptr == '#' ) lptr++; + if( HeadColumnProcess(hc, lptr) ){ + fprintf(stderr, "+"); + } + } + } + else{ + while( fgets(lbuf, SZ_LINE, stdin) ){ + lptr = lbuf; + if( *lptr == '#' ) lptr++; + if( HeadColumnProcess(hc, lptr) ){ + fprintf(stderr, "+"); + } + } + } + + /* display result -- the column specification */ + if( HeadColumnExpr(hc) ){ + fprintf(stderr, "\n%s\n", HeadColumnExpr(hc)); + } + + /* clean up */ + HeadColumnFree(hc); + return 0; +} |