a8d8eb4870
* configure.in: -Wmissing-prototypes -Wmissing-declarations
* camlibs/agfa-cl18/commands.c:
* camlibs/agfa-cl18/usb.c:
* frontends/command-line/foreach.c:
* frontends/command-line/interface.c:
* frontends/command-line/main.c:
* frontends/command-line/options.c:
* frontends/command-line/range.c:
* frontends/command-line/shell.h:
* include/gphoto2-file.h:
* libgphoto2/file.c: First step towards a compilation with -Werror
git-svn-id: https://svn.code.sf.net/p/gphoto/code/trunk/libgphoto2@2017 67ed7778-7388-44ab-90cf-0a291f65f57c
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "main.h"
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#include "range.h"
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/*
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str_grab_nat() - Grab positive decimal integer (natural number) from str
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starting with pos byte. On return pos points to the first byte after
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grabbed integer.
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*/
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int str_grab_nat(const char *str, int *pos) {
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int result, old_pos = *pos;
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char *buf;
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if (!(buf = (char*)strdup(str))) /* we can not modify str */
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return -1;
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*pos += strspn(&buf[*pos], "0123456789");
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buf[*pos] = 0;
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result = atoi(&buf[old_pos]);
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free(buf);
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return result;
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}
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/*
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parse_range() - Intentionally, parse list of images given in range. Syntax
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of range is:
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( m | m-n ) { , ( m | m-n ) }
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where m,n are decimal integers with 1 <= m <= n <= MAX_IMAGE_NUMBER.
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Ranges are XOR (exclusive or), so that
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1-5,3,7
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is equivalent to
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1,2,4,5,7
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Conversion from 1-based to 0-based numbering is performed, that is,
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n-th image corresponds to (n-1)-th byte in index. The value of
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index[n] is either 0 or 1. 0 means not selected, 1 selected.
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index passed to parse_range() must be an array of MAX_IMAGE_NUMBER
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char-s set to 0 (use memset() or bzero()).
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*/
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int parse_range(const char *range, char *index) {
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int i = 0, l = -1, r = -1, j;
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do {
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switch (range[i]) {
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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l = str_grab_nat(range, &i);
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if (l <= 0 || MAX_IMAGE_NUMBER < l)
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return (GP_ERROR);
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break;
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case '-' :
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if (i == 0)
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return (GP_ERROR); /* '-' begins range */
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i++;
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r = str_grab_nat(range, &i);
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if (r <= 0 || MAX_IMAGE_NUMBER < r)
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return (GP_ERROR);
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break;
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case '\0' :
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break;
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case ',' :
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break;
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default :
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return (GP_ERROR); /* unexpected character */
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}
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} while (range[i] != '\0' && range[i] != ','); /* scan range till its end or ',' */
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if (i == 0)
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return (GP_ERROR); /* empty range or ',' at the begining */
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if (0 < r) { /* update range of bytes */
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if (r < l)
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return (GP_ERROR); /* decreasing ranges are not allowed */
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for (j = l; j <= r; j++)
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index[j - 1] ^= 1; /* convert to 0-based numbering */
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}
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else /* update single byte */
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index[l - 1] ^= 1; /* convert to 0-based numbering */
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if (range[i] == ',')
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return parse_range(&range[i + 1], index); /* parse remainder */
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return (GP_OK);
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}
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